/* * Copyright © 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "igt.h" #include "igt_sysfs.h" #include "drm.h" IGT_TEST_DESCRIPTION("Test the i915 perf metrics streaming interface"); #define GEN6_MI_REPORT_PERF_COUNT ((0x28 << 23) | (3 - 2)) #define GEN8_MI_REPORT_PERF_COUNT ((0x28 << 23) | (4 - 2)) #define OAREPORT_REASON_MASK 0x3f #define OAREPORT_REASON_SHIFT 19 #define OAREPORT_REASON_TIMER (1<<0) #define OAREPORT_REASON_INTERNAL (3<<1) #define OAREPORT_REASON_CTX_SWITCH (1<<3) #define OAREPORT_REASON_GO (1<<4) #define OAREPORT_REASON_CLK_RATIO (1<<5) #define GFX_OP_PIPE_CONTROL ((3 << 29) | (3 << 27) | (2 << 24)) #define PIPE_CONTROL_CS_STALL (1 << 20) #define PIPE_CONTROL_GLOBAL_SNAPSHOT_COUNT_RESET (1 << 19) #define PIPE_CONTROL_TLB_INVALIDATE (1 << 18) #define PIPE_CONTROL_SYNC_GFDT (1 << 17) #define PIPE_CONTROL_MEDIA_STATE_CLEAR (1 << 16) #define PIPE_CONTROL_NO_WRITE (0 << 14) #define PIPE_CONTROL_WRITE_IMMEDIATE (1 << 14) #define PIPE_CONTROL_WRITE_DEPTH_COUNT (2 << 14) #define PIPE_CONTROL_WRITE_TIMESTAMP (3 << 14) #define PIPE_CONTROL_DEPTH_STALL (1 << 13) #define PIPE_CONTROL_RENDER_TARGET_FLUSH (1 << 12) #define PIPE_CONTROL_INSTRUCTION_INVALIDATE (1 << 11) #define PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE (1 << 10) /* GM45+ only */ #define PIPE_CONTROL_ISP_DIS (1 << 9) #define PIPE_CONTROL_INTERRUPT_ENABLE (1 << 8) #define PIPE_CONTROL_FLUSH_ENABLE (1 << 7) /* Gen7+ only */ /* GT */ #define PIPE_CONTROL_DATA_CACHE_INVALIDATE (1 << 5) #define PIPE_CONTROL_VF_CACHE_INVALIDATE (1 << 4) #define PIPE_CONTROL_CONST_CACHE_INVALIDATE (1 << 3) #define PIPE_CONTROL_STATE_CACHE_INVALIDATE (1 << 2) #define PIPE_CONTROL_STALL_AT_SCOREBOARD (1 << 1) #define PIPE_CONTROL_DEPTH_CACHE_FLUSH (1 << 0) #define PIPE_CONTROL_PPGTT_WRITE (0 << 2) #define PIPE_CONTROL_GLOBAL_GTT_WRITE (1 << 2) #define MAX_OA_BUF_SIZE (16 * 1024 * 1024) struct accumulator { #define MAX_RAW_OA_COUNTERS 62 enum drm_i915_oa_format format; uint64_t deltas[MAX_RAW_OA_COUNTERS]; }; struct oa_format { const char *name; size_t size; int a40_high_off; /* bytes */ int a40_low_off; int n_a40; int a_off; int n_a; int first_a; int b_off; int n_b; int c_off; int n_c; }; static struct oa_format hsw_oa_formats[I915_OA_FORMAT_MAX] = { [I915_OA_FORMAT_A13] = { /* HSW only */ "A13", .size = 64, .a_off = 12, .n_a = 13, }, [I915_OA_FORMAT_A29] = { /* HSW only */ "A29", .size = 128, .a_off = 12, .n_a = 29, }, [I915_OA_FORMAT_A13_B8_C8] = { /* HSW only */ "A13_B8_C8", .size = 128, .a_off = 12, .n_a = 13, .b_off = 64, .n_b = 8, .c_off = 96, .n_c = 8, }, [I915_OA_FORMAT_A45_B8_C8] = { /* HSW only */ "A45_B8_C8", .size = 256, .a_off = 12, .n_a = 45, .b_off = 192, .n_b = 8, .c_off = 224, .n_c = 8, }, [I915_OA_FORMAT_B4_C8] = { /* HSW only */ "B4_C8", .size = 64, .b_off = 16, .n_b = 4, .c_off = 32, .n_c = 8, }, [I915_OA_FORMAT_B4_C8_A16] = { /* HSW only */ "B4_C8_A16", .size = 128, .b_off = 16, .n_b = 4, .c_off = 32, .n_c = 8, .a_off = 60, .n_a = 16, .first_a = 29, }, [I915_OA_FORMAT_C4_B8] = { /* HSW+ (header differs from HSW-Gen8+) */ "C4_B8", .size = 64, .c_off = 16, .n_c = 4, .b_off = 28, .n_b = 8 }, }; static struct oa_format gen8_oa_formats[I915_OA_FORMAT_MAX] = { [I915_OA_FORMAT_A12] = { "A12", .size = 64, .a_off = 12, .n_a = 12, .first_a = 7, }, [I915_OA_FORMAT_A12_B8_C8] = { "A12_B8_C8", .size = 128, .a_off = 12, .n_a = 12, .b_off = 64, .n_b = 8, .c_off = 96, .n_c = 8, .first_a = 7, }, [I915_OA_FORMAT_A32u40_A4u32_B8_C8] = { "A32u40_A4u32_B8_C8", .size = 256, .a40_high_off = 160, .a40_low_off = 16, .n_a40 = 32, .a_off = 144, .n_a = 4, .first_a = 32, .b_off = 192, .n_b = 8, .c_off = 224, .n_c = 8, }, [I915_OA_FORMAT_C4_B8] = { "C4_B8", .size = 64, .c_off = 16, .n_c = 4, .b_off = 32, .n_b = 8, }, }; static bool hsw_undefined_a_counters[45] = { [4] = true, [6] = true, [9] = true, [11] = true, [14] = true, [16] = true, [19] = true, [21] = true, [24] = true, [26] = true, [29] = true, [31] = true, [34] = true, [43] = true, [44] = true, }; /* No A counters currently reserved/undefined for gen8+ so far */ static bool gen8_undefined_a_counters[45]; static int drm_fd = -1; static int sysfs = -1; static int pm_fd = -1; static int stream_fd = -1; static uint32_t devid; static int n_eus; static uint64_t test_metric_set_id = UINT64_MAX; static uint64_t timestamp_frequency = 12500000; static uint64_t gt_max_freq_mhz = 0; static enum drm_i915_oa_format test_oa_format; static bool *undefined_a_counters; static uint64_t oa_exp_1_millisec; static igt_render_copyfunc_t render_copy = NULL; static uint32_t (*read_report_ticks)(uint32_t *report, enum drm_i915_oa_format format); static void (*sanity_check_reports)(uint32_t *oa_report0, uint32_t *oa_report1, enum drm_i915_oa_format format); static struct oa_format get_oa_format(enum drm_i915_oa_format format) { if (IS_HASWELL(devid)) return hsw_oa_formats[format]; return gen8_oa_formats[format]; } static void __perf_close(int fd) { close(fd); stream_fd = -1; if (pm_fd >= 0) { close(pm_fd); pm_fd = -1; } } static int __perf_open(int fd, struct drm_i915_perf_open_param *param, bool prevent_pm) { int ret; int32_t pm_value = 0; if (stream_fd >= 0) __perf_close(stream_fd); if (pm_fd >= 0) { close(pm_fd); pm_fd = -1; } ret = igt_ioctl(fd, DRM_IOCTL_I915_PERF_OPEN, param); igt_assert(ret >= 0); errno = 0; if (prevent_pm) { pm_fd = open("/dev/cpu_dma_latency", O_RDWR); igt_assert(pm_fd >= 0); igt_assert_eq(write(pm_fd, &pm_value, sizeof(pm_value)), sizeof(pm_value)); } return ret; } static int lookup_format(int i915_perf_fmt_id) { igt_assert(i915_perf_fmt_id < I915_OA_FORMAT_MAX); igt_assert(get_oa_format(i915_perf_fmt_id).name); return i915_perf_fmt_id; } static uint64_t read_u64_file(const char *path) { FILE *f; uint64_t val; f = fopen(path, "r"); igt_assert(f); igt_assert_eq(fscanf(f, "%"PRIu64, &val), 1); fclose(f); return val; } static void write_u64_file(const char *path, uint64_t val) { FILE *f; f = fopen(path, "w"); igt_assert(f); igt_assert(fprintf(f, "%"PRIu64, val) > 0); fclose(f); } static bool try_sysfs_read_u64(const char *path, uint64_t *val) { return igt_sysfs_scanf(sysfs, path, "%"PRIu64, val) == 1; } static unsigned long sysfs_read(const char *path) { unsigned long value; igt_assert(igt_sysfs_scanf(sysfs, path, "%lu", &value) == 1); return value; } /* XXX: For Haswell this utility is only applicable to the render basic * metric set. * * C2 corresponds to a clock counter for the Haswell render basic metric set * but it's not included in all of the formats. */ static uint32_t hsw_read_report_ticks(uint32_t *report, enum drm_i915_oa_format format) { uint32_t *c = (uint32_t *)(((uint8_t *)report) + get_oa_format(format).c_off); igt_assert_neq(get_oa_format(format).n_c, 0); return c[2]; } static uint32_t gen8_read_report_ticks(uint32_t *report, enum drm_i915_oa_format format) { return report[3]; } static void gen8_read_report_clock_ratios(uint32_t *report, uint32_t *slice_freq_mhz, uint32_t *unslice_freq_mhz) { uint32_t unslice_freq = report[0] & 0x1ff; uint32_t slice_freq_low = (report[0] >> 25) & 0x7f; uint32_t slice_freq_high = (report[0] >> 9) & 0x3; uint32_t slice_freq = slice_freq_low | (slice_freq_high << 7); *slice_freq_mhz = (slice_freq * 16666) / 1000; *unslice_freq_mhz = (unslice_freq * 16666) / 1000; } static const char * gen8_read_report_reason(const uint32_t *report) { uint32_t reason = ((report[0] >> OAREPORT_REASON_SHIFT) & OAREPORT_REASON_MASK); if (reason & (1<<0)) return "timer"; else if (reason & (1<<1)) return "internal trigger 1"; else if (reason & (1<<2)) return "internal trigger 2"; else if (reason & (1<<3)) return "context switch"; else if (reason & (1<<4)) return "GO 1->0 transition (enter RC6)"; else if (reason & (1<<5)) return "[un]slice clock ratio change"; else return "unknown"; } static uint64_t timebase_scale(uint32_t u32_delta) { return ((uint64_t)u32_delta * NSEC_PER_SEC) / timestamp_frequency; } /* Returns: the largest OA exponent that will still result in a sampling period * less than or equal to the given @period. */ static int max_oa_exponent_for_period_lte(uint64_t period) { /* NB: timebase_scale() takes a uint32_t and an exponent of 30 * would already represent a period of ~3 minutes so there's * really no need to consider higher exponents. */ for (int i = 0; i < 30; i++) { uint64_t oa_period = timebase_scale(2 << i); if (oa_period > period) return max(0, i - 1); } igt_assert(!"reached"); return -1; } /* Return: the largest OA exponent that will still result in a sampling * frequency greater than the given @frequency. */ static int max_oa_exponent_for_freq_gt(uint64_t frequency) { uint64_t period = NSEC_PER_SEC / frequency; igt_assert_neq(period, 0); return max_oa_exponent_for_period_lte(period - 1); } static uint64_t oa_exponent_to_ns(int exponent) { return 1000000000ULL * (2ULL << exponent) / timestamp_frequency; } static bool oa_report_is_periodic(uint32_t oa_exponent, const uint32_t *report) { if (IS_HASWELL(devid)) { /* For Haswell we don't have a documented report reason field * (though empirically report[0] bit 10 does seem to correlate * with a timer trigger reason) so we instead infer which * reports are timer triggered by checking if the least * significant bits are zero and the exponent bit is set. */ uint32_t oa_exponent_mask = (1 << (oa_exponent + 1)) - 1; if ((report[1] & oa_exponent_mask) == (1 << oa_exponent)) return true; } else { if ((report[0] >> OAREPORT_REASON_SHIFT) & OAREPORT_REASON_TIMER) return true; } return false; } static bool oa_report_ctx_is_valid(uint32_t *report) { if (IS_HASWELL(devid)) { return false; /* TODO */ } else if (IS_GEN8(devid)) { return report[0] & (1ul << 25); } else if (AT_LEAST_GEN(devid, 9)) { return report[0] & (1ul << 16); } igt_assert(!"Please update this function for newer Gen"); } static uint32_t oa_report_get_ctx_id(uint32_t *report) { if (!oa_report_ctx_is_valid(report)) return 0xffffffff; return report[2]; } static void scratch_buf_memset(drm_intel_bo *bo, int width, int height, uint32_t color) { int ret; ret = drm_intel_bo_map(bo, true /* writable */); igt_assert_eq(ret, 0); for (int i = 0; i < width * height; i++) ((uint32_t *)bo->virtual)[i] = color; drm_intel_bo_unmap(bo); } static void scratch_buf_init(drm_intel_bufmgr *bufmgr, struct igt_buf *buf, int width, int height, uint32_t color) { size_t stride = width * 4; size_t size = stride * height; drm_intel_bo *bo = drm_intel_bo_alloc(bufmgr, "", size, 4096); scratch_buf_memset(bo, width, height, color); memset(buf, 0, sizeof(*buf)); buf->bo = bo; buf->stride = stride; buf->tiling = I915_TILING_NONE; buf->size = size; buf->bpp = 32; } static void emit_report_perf_count(struct intel_batchbuffer *batch, drm_intel_bo *dst_bo, int dst_offset, uint32_t report_id) { if (IS_HASWELL(devid)) { BEGIN_BATCH(3, 1); OUT_BATCH(GEN6_MI_REPORT_PERF_COUNT); OUT_RELOC(dst_bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, dst_offset); OUT_BATCH(report_id); ADVANCE_BATCH(); } else { /* XXX: NB: n dwords arg is actually magic since it internally * automatically accounts for larger addresses on gen >= 8... */ BEGIN_BATCH(3, 1); OUT_BATCH(GEN8_MI_REPORT_PERF_COUNT); OUT_RELOC(dst_bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, dst_offset); OUT_BATCH(report_id); ADVANCE_BATCH(); } } static void hsw_sanity_check_render_basic_reports(uint32_t *oa_report0, uint32_t *oa_report1, enum drm_i915_oa_format fmt) { uint32_t time_delta = timebase_scale(oa_report1[1] - oa_report0[1]); uint32_t clock_delta; uint32_t max_delta; struct oa_format format = get_oa_format(fmt); igt_assert_neq(time_delta, 0); /* As a special case we have to consider that on Haswell we * can't explicitly derive a clock delta for all OA report * formats... */ if (format.n_c == 0) { /* Assume running at max freq for sake of * below sanity check on counters... */ clock_delta = (gt_max_freq_mhz * (uint64_t)time_delta) / 1000; } else { uint32_t ticks0 = read_report_ticks(oa_report0, fmt); uint32_t ticks1 = read_report_ticks(oa_report1, fmt); uint64_t freq; clock_delta = ticks1 - ticks0; igt_assert_neq(clock_delta, 0); freq = ((uint64_t)clock_delta * 1000) / time_delta; igt_debug("freq = %"PRIu64"\n", freq); igt_assert(freq <= gt_max_freq_mhz); } igt_debug("clock delta = %"PRIu32"\n", clock_delta); /* The maximum rate for any HSW counter = * clock_delta * N EUs * * Sanity check that no counters exceed this delta. */ max_delta = clock_delta * n_eus; /* 40bit A counters were only introduced for Gen8+ */ igt_assert_eq(format.n_a40, 0); for (int j = 0; j < format.n_a; j++) { uint32_t *a0 = (uint32_t *)(((uint8_t *)oa_report0) + format.a_off); uint32_t *a1 = (uint32_t *)(((uint8_t *)oa_report1) + format.a_off); int a_id = format.first_a + j; uint32_t delta = a1[j] - a0[j]; if (undefined_a_counters[a_id]) continue; igt_debug("A%d: delta = %"PRIu32"\n", a_id, delta); igt_assert(delta <= max_delta); } for (int j = 0; j < format.n_b; j++) { uint32_t *b0 = (uint32_t *)(((uint8_t *)oa_report0) + format.b_off); uint32_t *b1 = (uint32_t *)(((uint8_t *)oa_report1) + format.b_off); uint32_t delta = b1[j] - b0[j]; igt_debug("B%d: delta = %"PRIu32"\n", j, delta); igt_assert(delta <= max_delta); } for (int j = 0; j < format.n_c; j++) { uint32_t *c0 = (uint32_t *)(((uint8_t *)oa_report0) + format.c_off); uint32_t *c1 = (uint32_t *)(((uint8_t *)oa_report1) + format.c_off); uint32_t delta = c1[j] - c0[j]; igt_debug("C%d: delta = %"PRIu32"\n", j, delta); igt_assert(delta <= max_delta); } } static uint64_t gen8_read_40bit_a_counter(uint32_t *report, enum drm_i915_oa_format fmt, int a_id) { struct oa_format format = get_oa_format(fmt); uint8_t *a40_high = (((uint8_t *)report) + format.a40_high_off); uint32_t *a40_low = (uint32_t *)(((uint8_t *)report) + format.a40_low_off); uint64_t high = (uint64_t)(a40_high[a_id]) << 32; return a40_low[a_id] | high; } static uint64_t gen8_40bit_a_delta(uint64_t value0, uint64_t value1) { if (value0 > value1) return (1ULL << 40) + value1 - value0; else return value1 - value0; } static void accumulate_uint32(size_t offset, uint32_t *report0, uint32_t *report1, uint64_t *delta) { uint32_t value0 = *(uint32_t *)(((uint8_t *)report0) + offset); uint32_t value1 = *(uint32_t *)(((uint8_t *)report1) + offset); *delta += (uint32_t)(value1 - value0); } static void accumulate_uint40(int a_index, uint32_t *report0, uint32_t *report1, enum drm_i915_oa_format format, uint64_t *delta) { uint64_t value0 = gen8_read_40bit_a_counter(report0, format, a_index), value1 = gen8_read_40bit_a_counter(report1, format, a_index); *delta += gen8_40bit_a_delta(value0, value1); } static void accumulate_reports(struct accumulator *accumulator, uint32_t *start, uint32_t *end) { struct oa_format format = get_oa_format(accumulator->format); uint64_t *deltas = accumulator->deltas; int idx = 0; if (intel_gen(devid) >= 8) { /* timestamp */ accumulate_uint32(4, start, end, deltas + idx++); /* clock cycles */ accumulate_uint32(12, start, end, deltas + idx++); } else { /* timestamp */ accumulate_uint32(4, start, end, deltas + idx++); } for (int i = 0; i < format.n_a40; i++) { accumulate_uint40(i, start, end, accumulator->format, deltas + idx++); } for (int i = 0; i < format.n_a; i++) { accumulate_uint32(format.a_off + 4 * i, start, end, deltas + idx++); } for (int i = 0; i < format.n_b; i++) { accumulate_uint32(format.b_off + 4 * i, start, end, deltas + idx++); } for (int i = 0; i < format.n_c; i++) { accumulate_uint32(format.c_off + 4 * i, start, end, deltas + idx++); } } static void accumulator_print(struct accumulator *accumulator, const char *title) { struct oa_format format = get_oa_format(accumulator->format); uint64_t *deltas = accumulator->deltas; int idx = 0; igt_debug("%s:\n", title); if (intel_gen(devid) >= 8) { igt_debug("\ttime delta = %"PRIu64"\n", deltas[idx++]); igt_debug("\tclock cycle delta = %"PRIu64"\n", deltas[idx++]); for (int i = 0; i < format.n_a40; i++) igt_debug("\tA%u = %"PRIu64"\n", i, deltas[idx++]); } else { igt_debug("\ttime delta = %"PRIu64"\n", deltas[idx++]); } for (int i = 0; i < format.n_a; i++) { int a_id = format.first_a + i; igt_debug("\tA%u = %"PRIu64"\n", a_id, deltas[idx++]); } for (int i = 0; i < format.n_a; i++) igt_debug("\tB%u = %"PRIu64"\n", i, deltas[idx++]); for (int i = 0; i < format.n_c; i++) igt_debug("\tC%u = %"PRIu64"\n", i, deltas[idx++]); } /* The TestOa metric set is designed so */ static void gen8_sanity_check_test_oa_reports(uint32_t *oa_report0, uint32_t *oa_report1, enum drm_i915_oa_format fmt) { struct oa_format format = get_oa_format(fmt); uint32_t time_delta = timebase_scale(oa_report1[1] - oa_report0[1]); uint32_t ticks0 = read_report_ticks(oa_report0, fmt); uint32_t ticks1 = read_report_ticks(oa_report1, fmt); uint32_t clock_delta = ticks1 - ticks0; uint32_t max_delta; uint64_t freq; uint32_t *rpt0_b = (uint32_t *)(((uint8_t *)oa_report0) + format.b_off); uint32_t *rpt1_b = (uint32_t *)(((uint8_t *)oa_report1) + format.b_off); uint32_t b; uint32_t ref; igt_assert_neq(time_delta, 0); igt_assert_neq(clock_delta, 0); freq = ((uint64_t)clock_delta * 1000) / time_delta; igt_debug("freq = %"PRIu64"\n", freq); igt_assert(freq <= gt_max_freq_mhz); igt_debug("clock delta = %"PRIu32"\n", clock_delta); max_delta = clock_delta * n_eus; /* Gen8+ has some 40bit A counters... */ for (int j = 0; j < format.n_a40; j++) { uint64_t value0 = gen8_read_40bit_a_counter(oa_report0, fmt, j); uint64_t value1 = gen8_read_40bit_a_counter(oa_report1, fmt, j); uint64_t delta = gen8_40bit_a_delta(value0, value1); if (undefined_a_counters[j]) continue; igt_debug("A%d: delta = %"PRIu64"\n", j, delta); igt_assert(delta <= max_delta); } for (int j = 0; j < format.n_a; j++) { uint32_t *a0 = (uint32_t *)(((uint8_t *)oa_report0) + format.a_off); uint32_t *a1 = (uint32_t *)(((uint8_t *)oa_report1) + format.a_off); int a_id = format.first_a + j; uint32_t delta = a1[j] - a0[j]; if (undefined_a_counters[a_id]) continue; igt_debug("A%d: delta = %"PRIu32"\n", a_id, delta); igt_assert(delta <= max_delta); } /* The TestOa metric set defines all B counters to be a * multiple of the gpu clock */ if (format.n_b) { b = rpt1_b[0] - rpt0_b[0]; igt_debug("B0: delta = %"PRIu32"\n", b); igt_assert_eq(b, 0); b = rpt1_b[1] - rpt0_b[1]; igt_debug("B1: delta = %"PRIu32"\n", b); igt_assert_eq(b, clock_delta); b = rpt1_b[2] - rpt0_b[2]; igt_debug("B2: delta = %"PRIu32"\n", b); igt_assert_eq(b, clock_delta); b = rpt1_b[3] - rpt0_b[3]; ref = clock_delta / 2; igt_debug("B3: delta = %"PRIu32"\n", b); igt_assert(b >= ref - 1 && b <= ref + 1); b = rpt1_b[4] - rpt0_b[4]; ref = clock_delta / 3; igt_debug("B4: delta = %"PRIu32"\n", b); igt_assert(b >= ref - 1 && b <= ref + 1); b = rpt1_b[5] - rpt0_b[5]; ref = clock_delta / 3; igt_debug("B5: delta = %"PRIu32"\n", b); igt_assert(b >= ref - 1 && b <= ref + 1); b = rpt1_b[6] - rpt0_b[6]; ref = clock_delta / 6; igt_debug("B6: delta = %"PRIu32"\n", b); igt_assert(b >= ref - 1 && b <= ref + 1); b = rpt1_b[7] - rpt0_b[7]; ref = clock_delta * 2 / 3; igt_debug("B7: delta = %"PRIu32"\n", b); igt_assert(b >= ref - 1 && b <= ref + 1); } for (int j = 0; j < format.n_c; j++) { uint32_t *c0 = (uint32_t *)(((uint8_t *)oa_report0) + format.c_off); uint32_t *c1 = (uint32_t *)(((uint8_t *)oa_report1) + format.c_off); uint32_t delta = c1[j] - c0[j]; igt_debug("C%d: delta = %"PRIu32"\n", j, delta); igt_assert(delta <= max_delta); } } static uint64_t get_cs_timestamp_frequency(void) { int cs_ts_freq = 0; drm_i915_getparam_t gp; gp.param = I915_PARAM_CS_TIMESTAMP_FREQUENCY; gp.value = &cs_ts_freq; if (igt_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp) == 0) return cs_ts_freq; igt_debug("Couldn't query CS timestamp frequency, trying to guess based on PCI-id\n"); if (IS_GEN7(devid) || IS_GEN8(devid)) return 12500000; if (IS_SKYLAKE(devid) || IS_KABYLAKE(devid) || IS_COFFEELAKE(devid)) return 12000000; if (IS_BROXTON(devid) || IS_GEMINILAKE(devid)) return 19200000; igt_skip("Kernel with PARAM_CS_TIMESTAMP_FREQUENCY support required\n"); } static bool init_sys_info(void) { const char *test_set_name = NULL; const char *test_set_uuid = NULL; char buf[256]; igt_assert_neq(devid, 0); timestamp_frequency = get_cs_timestamp_frequency(); igt_assert_neq(timestamp_frequency, 0); if (IS_HASWELL(devid)) { /* We don't have a TestOa metric set for Haswell so use * RenderBasic */ test_set_name = "RenderBasic"; test_set_uuid = "403d8832-1a27-4aa6-a64e-f5389ce7b212"; test_oa_format = I915_OA_FORMAT_A45_B8_C8; undefined_a_counters = hsw_undefined_a_counters; read_report_ticks = hsw_read_report_ticks; sanity_check_reports = hsw_sanity_check_render_basic_reports; if (intel_gt(devid) == 0) n_eus = 10; else if (intel_gt(devid) == 1) n_eus = 20; else if (intel_gt(devid) == 2) n_eus = 40; else { igt_assert(!"reached"); return false; } } else { drm_i915_getparam_t gp; test_set_name = "TestOa"; test_oa_format = I915_OA_FORMAT_A32u40_A4u32_B8_C8; undefined_a_counters = gen8_undefined_a_counters; read_report_ticks = gen8_read_report_ticks; sanity_check_reports = gen8_sanity_check_test_oa_reports; if (IS_BROADWELL(devid)) { test_set_uuid = "d6de6f55-e526-4f79-a6a6-d7315c09044e"; } else if (IS_CHERRYVIEW(devid)) { test_set_uuid = "4a534b07-cba3-414d-8d60-874830e883aa"; } else if (IS_SKYLAKE(devid)) { switch (intel_gt(devid)) { case 1: test_set_uuid = "1651949f-0ac0-4cb1-a06f-dafd74a407d1"; break; case 2: test_set_uuid = "2b985803-d3c9-4629-8a4f-634bfecba0e8"; break; case 3: test_set_uuid = "882fa433-1f4a-4a67-a962-c741888fe5f5"; break; default: igt_debug("unsupported Skylake GT size\n"); return false; } } else if (IS_BROXTON(devid)) { test_set_uuid = "5ee72f5c-092f-421e-8b70-225f7c3e9612"; } else if (IS_KABYLAKE(devid)) { switch (intel_gt(devid)) { case 1: test_set_uuid = "baa3c7e4-52b6-4b85-801e-465a94b746dd"; break; case 2: test_set_uuid = "f1792f32-6db2-4b50-b4b2-557128f1688d"; break; default: igt_debug("unsupported Kabylake GT size\n"); return false; } } else if (IS_GEMINILAKE(devid)) { test_set_uuid = "dd3fd789-e783-4204-8cd0-b671bbccb0cf"; } else if (IS_COFFEELAKE(devid)) { switch (intel_gt(devid)) { case 1: test_set_uuid = "74fb4902-d3d3-4237-9e90-cbdc68d0a446"; break; case 2: test_set_uuid = "577e8e2c-3fa0-4875-8743-3538d585e3b0"; break; default: igt_debug("unsupported Coffeelake GT size\n"); return false; } } else if (IS_CANNONLAKE(devid)) { test_set_uuid = "db41edd4-d8e7-4730-ad11-b9a2d6833503"; } else if (IS_ICELAKE(devid)) { test_set_uuid = "a291665e-244b-4b76-9b9a-01de9d3c8068"; } else { igt_debug("unsupported GT\n"); return false; } gp.param = I915_PARAM_EU_TOTAL; gp.value = &n_eus; do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp); } igt_debug("%s metric set UUID = %s\n", test_set_name, test_set_uuid); oa_exp_1_millisec = max_oa_exponent_for_period_lte(1000000); snprintf(buf, sizeof(buf), "metrics/%s/id", test_set_uuid); return try_sysfs_read_u64(buf, &test_metric_set_id); } static int i915_read_reports_until_timestamp(enum drm_i915_oa_format oa_format, uint8_t *buf, uint32_t max_size, uint32_t start_timestamp, uint32_t end_timestamp) { size_t format_size = get_oa_format(oa_format).size; uint32_t last_seen_timestamp = start_timestamp; int total_len = 0; while (last_seen_timestamp < end_timestamp) { int offset, len; /* Running out of space. */ if ((max_size - total_len) < format_size) { igt_warn("run out of space before reaching " "end timestamp (%u/%u)\n", last_seen_timestamp, end_timestamp); return -1; } while ((len = read(stream_fd, &buf[total_len], max_size - total_len)) < 0 && errno == EINTR) ; /* Intentionally return an error. */ if (len <= 0) { if (errno == EAGAIN) return total_len; else { igt_warn("error read OA stream : %i\n", errno); return -1; } } offset = total_len; total_len += len; while (offset < total_len) { const struct drm_i915_perf_record_header *header = (const struct drm_i915_perf_record_header *) &buf[offset]; uint32_t *report = (uint32_t *) (header + 1); if (header->type == DRM_I915_PERF_RECORD_SAMPLE) last_seen_timestamp = report[1]; offset += header->size; } } return total_len; } /* CAP_SYS_ADMIN is required to open system wide metrics, unless the system * control parameter dev.i915.perf_stream_paranoid == 0 */ static void test_system_wide_paranoid(void) { igt_fork(child, 1) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_FD_NONBLOCK, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); igt_drop_root(); do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EACCES); } igt_waitchildren(); igt_fork(child, 1) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_FD_NONBLOCK, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 0); igt_drop_root(); stream_fd = __perf_open(drm_fd, ¶m, false); __perf_close(stream_fd); } igt_waitchildren(); /* leave in paranoid state */ write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); } static void test_invalid_open_flags(void) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, }; struct drm_i915_perf_open_param param = { .flags = ~0, /* Undefined flag bits set! */ .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); } static void test_invalid_oa_metric_set_id(void) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, DRM_I915_PERF_PROP_OA_METRICS_SET, UINT64_MAX, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_FD_NONBLOCK, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); properties[ARRAY_SIZE(properties) - 1] = 0; /* ID 0 is also be reserved as invalid */ do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); /* Check that we aren't just seeing false positives... */ properties[ARRAY_SIZE(properties) - 1] = test_metric_set_id; stream_fd = __perf_open(drm_fd, ¶m, false); __perf_close(stream_fd); /* There's no valid default OA metric set ID... */ param.num_properties--; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); } static void test_invalid_oa_format_id(void) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, DRM_I915_PERF_PROP_OA_FORMAT, UINT64_MAX, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_FD_NONBLOCK, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); properties[ARRAY_SIZE(properties) - 1] = 0; /* ID 0 is also be reserved as invalid */ do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); /* Check that we aren't just seeing false positives... */ properties[ARRAY_SIZE(properties) - 1] = test_oa_format; stream_fd = __perf_open(drm_fd, ¶m, false); __perf_close(stream_fd); /* There's no valid default OA format... */ param.num_properties--; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); } static void test_missing_sample_flags(void) { uint64_t properties[] = { /* No _PROP_SAMPLE_xyz flags */ /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); } static void read_2_oa_reports(int format_id, int exponent, uint32_t *oa_report0, uint32_t *oa_report1, bool timer_only) { size_t format_size = get_oa_format(format_id).size; size_t sample_size = (sizeof(struct drm_i915_perf_record_header) + format_size); const struct drm_i915_perf_record_header *header; uint32_t exponent_mask = (1 << (exponent + 1)) - 1; /* Note: we allocate a large buffer so that each read() iteration * should scrape *all* pending records. * * The largest buffer the OA unit supports is 16MB. * * Being sure we are fetching all buffered reports allows us to * potentially throw away / skip all reports whenever we see * a _REPORT_LOST notification as a way of being sure are * measurements aren't skewed by a lost report. * * Note: that is is useful for some tests but also not something * applications would be expected to resort to. Lost reports are * somewhat unpredictable but typically don't pose a problem - except * to indicate that the OA unit may be over taxed if lots of reports * are being lost. */ int max_reports = MAX_OA_BUF_SIZE / format_size; int buf_size = sample_size * max_reports * 1.5; uint8_t *buf = malloc(buf_size); int n = 0; for (int i = 0; i < 1000; i++) { ssize_t len; while ((len = read(stream_fd, buf, buf_size)) < 0 && errno == EINTR) ; igt_assert(len > 0); igt_debug("read %d bytes\n", (int)len); for (size_t offset = 0; offset < len; offset += header->size) { const uint32_t *report; header = (void *)(buf + offset); igt_assert_eq(header->pad, 0); /* Reserved */ /* Currently the only test that should ever expect to * see a _BUFFER_LOST error is the buffer_fill test, * otherwise something bad has probably happened... */ igt_assert_neq(header->type, DRM_I915_PERF_RECORD_OA_BUFFER_LOST); /* At high sampling frequencies the OA HW might not be * able to cope with all write requests and will notify * us that a report was lost. We restart our read of * two sequential reports due to the timeline blip this * implies */ if (header->type == DRM_I915_PERF_RECORD_OA_REPORT_LOST) { igt_debug("read restart: OA trigger collision / report lost\n"); n = 0; /* XXX: break, because we don't know where * within the series of already read reports * there could be a blip from the lost report. */ break; } /* Currently the only other record type expected is a * _SAMPLE. Notably this test will need updating if * i915-perf is extended in the future with additional * record types. */ igt_assert_eq(header->type, DRM_I915_PERF_RECORD_SAMPLE); igt_assert_eq(header->size, sample_size); report = (const void *)(header + 1); igt_debug("read report: reason = %x, timestamp = %x, exponent mask=%x\n", report[0], report[1], exponent_mask); /* Don't expect zero for timestamps */ igt_assert_neq(report[1], 0); if (timer_only) { if (!oa_report_is_periodic(exponent, report)) { igt_debug("skipping non timer report\n"); continue; } } if (n++ == 0) memcpy(oa_report0, report, format_size); else { memcpy(oa_report1, report, format_size); free(buf); return; } } } free(buf); igt_assert(!"reached"); } static void open_and_read_2_oa_reports(int format_id, int exponent, uint32_t *oa_report0, uint32_t *oa_report1, bool timer_only) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, format_id, DRM_I915_PERF_PROP_OA_EXPONENT, exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; stream_fd = __perf_open(drm_fd, ¶m, false); read_2_oa_reports(format_id, exponent, oa_report0, oa_report1, timer_only); __perf_close(stream_fd); } static void print_reports(uint32_t *oa_report0, uint32_t *oa_report1, int fmt) { struct oa_format format = get_oa_format(fmt); igt_debug("TIMESTAMP: 1st = %"PRIu32", 2nd = %"PRIu32", delta = %"PRIu32"\n", oa_report0[1], oa_report1[1], oa_report1[1] - oa_report0[1]); if (IS_HASWELL(devid) && format.n_c == 0) { igt_debug("CLOCK = N/A\n"); } else { uint32_t clock0 = read_report_ticks(oa_report0, fmt); uint32_t clock1 = read_report_ticks(oa_report1, fmt); igt_debug("CLOCK: 1st = %"PRIu32", 2nd = %"PRIu32", delta = %"PRIu32"\n", clock0, clock1, clock1 - clock0); } if (intel_gen(devid) >= 8) { uint32_t slice_freq0, slice_freq1, unslice_freq0, unslice_freq1; const char *reason0 = gen8_read_report_reason(oa_report0); const char *reason1 = gen8_read_report_reason(oa_report1); igt_debug("CTX ID: 1st = %"PRIu32", 2nd = %"PRIu32"\n", oa_report0[2], oa_report1[2]); gen8_read_report_clock_ratios(oa_report0, &slice_freq0, &unslice_freq0); gen8_read_report_clock_ratios(oa_report1, &slice_freq1, &unslice_freq1); igt_debug("SLICE CLK: 1st = %umhz, 2nd = %umhz, delta = %d\n", slice_freq0, slice_freq1, ((int)slice_freq1 - (int)slice_freq0)); igt_debug("UNSLICE CLK: 1st = %umhz, 2nd = %umhz, delta = %d\n", unslice_freq0, unslice_freq1, ((int)unslice_freq1 - (int)unslice_freq0)); igt_debug("REASONS: 1st = \"%s\", 2nd = \"%s\"\n", reason0, reason1); } /* Gen8+ has some 40bit A counters... */ for (int j = 0; j < format.n_a40; j++) { uint64_t value0 = gen8_read_40bit_a_counter(oa_report0, fmt, j); uint64_t value1 = gen8_read_40bit_a_counter(oa_report1, fmt, j); uint64_t delta = gen8_40bit_a_delta(value0, value1); if (undefined_a_counters[j]) continue; igt_debug("A%d: 1st = %"PRIu64", 2nd = %"PRIu64", delta = %"PRIu64"\n", j, value0, value1, delta); } for (int j = 0; j < format.n_a; j++) { uint32_t *a0 = (uint32_t *)(((uint8_t *)oa_report0) + format.a_off); uint32_t *a1 = (uint32_t *)(((uint8_t *)oa_report1) + format.a_off); int a_id = format.first_a + j; uint32_t delta = a1[j] - a0[j]; if (undefined_a_counters[a_id]) continue; igt_debug("A%d: 1st = %"PRIu32", 2nd = %"PRIu32", delta = %"PRIu32"\n", a_id, a0[j], a1[j], delta); } for (int j = 0; j < format.n_b; j++) { uint32_t *b0 = (uint32_t *)(((uint8_t *)oa_report0) + format.b_off); uint32_t *b1 = (uint32_t *)(((uint8_t *)oa_report1) + format.b_off); uint32_t delta = b1[j] - b0[j]; igt_debug("B%d: 1st = %"PRIu32", 2nd = %"PRIu32", delta = %"PRIu32"\n", j, b0[j], b1[j], delta); } for (int j = 0; j < format.n_c; j++) { uint32_t *c0 = (uint32_t *)(((uint8_t *)oa_report0) + format.c_off); uint32_t *c1 = (uint32_t *)(((uint8_t *)oa_report1) + format.c_off); uint32_t delta = c1[j] - c0[j]; igt_debug("C%d: 1st = %"PRIu32", 2nd = %"PRIu32", delta = %"PRIu32"\n", j, c0[j], c1[j], delta); } } /* Debug function, only useful when reports don't make sense. */ #if 0 static void print_report(uint32_t *report, int fmt) { struct oa_format format = get_oa_format(fmt); igt_debug("TIMESTAMP: %"PRIu32"\n", report[1]); if (IS_HASWELL(devid) && format.n_c == 0) { igt_debug("CLOCK = N/A\n"); } else { uint32_t clock = read_report_ticks(report, fmt); igt_debug("CLOCK: %"PRIu32"\n", clock); } if (intel_gen(devid) >= 8) { uint32_t slice_freq, unslice_freq; const char *reason = gen8_read_report_reason(report); gen8_read_report_clock_ratios(report, &slice_freq, &unslice_freq); igt_debug("SLICE CLK: %umhz\n", slice_freq); igt_debug("UNSLICE CLK: %umhz\n", unslice_freq); igt_debug("REASON: \"%s\"\n", reason); igt_debug("CTX ID: %"PRIu32"/%"PRIx32"\n", report[2], report[2]); } /* Gen8+ has some 40bit A counters... */ for (int j = 0; j < format.n_a40; j++) { uint64_t value = gen8_read_40bit_a_counter(report, fmt, j); if (undefined_a_counters[j]) continue; igt_debug("A%d: %"PRIu64"\n", j, value); } for (int j = 0; j < format.n_a; j++) { uint32_t *a = (uint32_t *)(((uint8_t *)report) + format.a_off); int a_id = format.first_a + j; if (undefined_a_counters[a_id]) continue; igt_debug("A%d: %"PRIu32"\n", a_id, a[j]); } for (int j = 0; j < format.n_b; j++) { uint32_t *b = (uint32_t *)(((uint8_t *)report) + format.b_off); igt_debug("B%d: %"PRIu32"\n", j, b[j]); } for (int j = 0; j < format.n_c; j++) { uint32_t *c = (uint32_t *)(((uint8_t *)report) + format.c_off); igt_debug("C%d: %"PRIu32"\n", j, c[j]); } } #endif static void test_oa_formats(void) { for (int i = 0; i < I915_OA_FORMAT_MAX; i++) { struct oa_format format = get_oa_format(i); uint32_t oa_report0[64]; uint32_t oa_report1[64]; if (!format.name) /* sparse, indexed by ID */ continue; igt_debug("Checking OA format %s\n", format.name); open_and_read_2_oa_reports(i, oa_exp_1_millisec, oa_report0, oa_report1, false); /* timer reports only */ print_reports(oa_report0, oa_report1, i); sanity_check_reports(oa_report0, oa_report1, i); } } enum load { LOW, HIGH }; #define LOAD_HELPER_PAUSE_USEC 500 static struct load_helper { int devid; drm_intel_bufmgr *bufmgr; drm_intel_context *context; uint32_t context_id; struct intel_batchbuffer *batch; enum load load; bool exit; struct igt_helper_process igt_proc; struct igt_buf src, dst; } lh = { 0, }; static void load_helper_signal_handler(int sig) { if (sig == SIGUSR2) lh.load = lh.load == LOW ? HIGH : LOW; else lh.exit = true; } static void load_helper_set_load(enum load load) { igt_assert(lh.igt_proc.running); if (lh.load == load) return; lh.load = load; kill(lh.igt_proc.pid, SIGUSR2); } static void load_helper_run(enum load load) { /* * FIXME fork helpers won't get cleaned up when started from within a * subtest, so handle the case where it sticks around a bit too long. */ if (lh.igt_proc.running) { load_helper_set_load(load); return; } lh.load = load; igt_fork_helper(&lh.igt_proc) { signal(SIGUSR1, load_helper_signal_handler); signal(SIGUSR2, load_helper_signal_handler); while (!lh.exit) { int ret; render_copy(lh.batch, lh.context, &lh.src, 0, 0, 1920, 1080, &lh.dst, 0, 0); intel_batchbuffer_flush_with_context(lh.batch, lh.context); ret = drm_intel_gem_context_get_id(lh.context, &lh.context_id); igt_assert_eq(ret, 0); drm_intel_bo_wait_rendering(lh.dst.bo); /* Lower the load by pausing after every submitted * write. */ if (lh.load == LOW) usleep(LOAD_HELPER_PAUSE_USEC); } } } static void load_helper_stop(void) { kill(lh.igt_proc.pid, SIGUSR1); igt_assert(igt_wait_helper(&lh.igt_proc) == 0); } static void load_helper_init(void) { int ret; lh.devid = intel_get_drm_devid(drm_fd); /* MI_STORE_DATA can only use GTT address on gen4+/g33 and needs * snoopable mem on pre-gen6. Hence load-helper only works on gen6+, but * that's also all we care about for the rps testcase*/ igt_assert(intel_gen(lh.devid) >= 6); lh.bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096); igt_assert(lh.bufmgr); drm_intel_bufmgr_gem_enable_reuse(lh.bufmgr); lh.context = drm_intel_gem_context_create(lh.bufmgr); igt_assert(lh.context); lh.context_id = 0xffffffff; ret = drm_intel_gem_context_get_id(lh.context, &lh.context_id); igt_assert_eq(ret, 0); igt_assert_neq(lh.context_id, 0xffffffff); lh.batch = intel_batchbuffer_alloc(lh.bufmgr, lh.devid); igt_assert(lh.batch); scratch_buf_init(lh.bufmgr, &lh.dst, 1920, 1080, 0); scratch_buf_init(lh.bufmgr, &lh.src, 1920, 1080, 0); } static void load_helper_fini(void) { if (lh.igt_proc.running) load_helper_stop(); if (lh.src.bo) drm_intel_bo_unreference(lh.src.bo); if (lh.dst.bo) drm_intel_bo_unreference(lh.dst.bo); if (lh.batch) intel_batchbuffer_free(lh.batch); if (lh.context) drm_intel_gem_context_destroy(lh.context); if (lh.bufmgr) drm_intel_bufmgr_destroy(lh.bufmgr); } static bool expected_report_timing_delta(uint32_t delta, uint32_t expected_delta) { /* * On ICL, the OA unit appears to be a bit more relaxed about * its timing for emitting OA reports (often missing the * deadline by 1 timestamp). */ if (IS_ICELAKE(devid)) return delta <= (expected_delta + 3); else return delta <= expected_delta; } static void test_oa_exponents(void) { load_helper_init(); load_helper_run(HIGH); /* It's asking a lot to sample with a 160 nanosecond period and the * test can fail due to buffer overflows if it wasn't possible to * keep up, so we don't start from an exponent of zero... */ for (int exponent = 5; exponent < 20; exponent++) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = ARRAY_SIZE(properties) / 2, .properties_ptr = to_user_pointer(properties), }; uint64_t expected_timestamp_delta = 2ULL << exponent; size_t format_size = get_oa_format(test_oa_format).size; size_t sample_size = (sizeof(struct drm_i915_perf_record_header) + format_size); int max_reports = MAX_OA_BUF_SIZE / format_size; int buf_size = sample_size * max_reports * 1.5; uint8_t *buf = calloc(1, buf_size); int ret, n_timer_reports = 0; uint32_t matches = 0; struct { uint32_t report[64]; } timer_reports[30]; igt_debug("testing OA exponent %d," " expected ts delta = %"PRIu64" (%"PRIu64"ns/%.2fus/%.2fms)\n", exponent, expected_timestamp_delta, oa_exponent_to_ns(exponent), oa_exponent_to_ns(exponent) / 1000.0, oa_exponent_to_ns(exponent) / (1000.0 * 1000.0)); stream_fd = __perf_open(drm_fd, ¶m, true /* prevent_pm */); while (n_timer_reports < ARRAY_SIZE(timer_reports)) { struct drm_i915_perf_record_header *header; while ((ret = read(stream_fd, buf, buf_size)) < 0 && errno == EINTR) ; /* igt_debug(" > read %i bytes\n", ret); */ /* We should never have no data. */ igt_assert(ret > 0); for (int offset = 0; offset < ret && n_timer_reports < ARRAY_SIZE(timer_reports); offset += header->size) { uint32_t *report; header = (void *)(buf + offset); if (header->type == DRM_I915_PERF_RECORD_OA_BUFFER_LOST) { igt_assert(!"reached"); break; } if (header->type == DRM_I915_PERF_RECORD_OA_REPORT_LOST) igt_debug("report loss\n"); if (header->type != DRM_I915_PERF_RECORD_SAMPLE) continue; report = (void *)(header + 1); if (!oa_report_is_periodic(exponent, report)) continue; memcpy(timer_reports[n_timer_reports].report, report, sizeof(timer_reports[n_timer_reports].report)); n_timer_reports++; } } __perf_close(stream_fd); igt_debug("report%04i ts=%08x hw_id=0x%08x\n", 0, timer_reports[0].report[1], oa_report_get_ctx_id(timer_reports[0].report)); for (int i = 1; i < n_timer_reports; i++) { uint32_t delta = timer_reports[i].report[1] - timer_reports[i - 1].report[1]; igt_debug("report%04i ts=%08x hw_id=0x%08x delta=%u %s\n", i, timer_reports[i].report[1], oa_report_get_ctx_id(timer_reports[i].report), delta, expected_report_timing_delta(delta, expected_timestamp_delta) ? "" : "******"); matches += expected_report_timing_delta(delta,expected_timestamp_delta); } igt_debug("matches=%u/%u\n", matches, n_timer_reports - 1); /* Allow for a couple of errors. */ igt_assert_lte(n_timer_reports - 3, matches); } load_helper_stop(); load_helper_fini(); } /* The OA exponent selects a timestamp counter bit to trigger reports on. * * With a 64bit timestamp and least significant bit approx == 80ns then the MSB * equates to > 40 thousand years and isn't exposed via the i915 perf interface. * * The max exponent exposed is expected to be 31, which is still a fairly * ridiculous period (>5min) but is the maximum exponent where it's still * possible to use periodic sampling as a means for tracking the overflow of * 32bit OA report timestamps. */ static void test_invalid_oa_exponent(void) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, 31, /* maximum exponent expected to be accepted */ }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; stream_fd = __perf_open(drm_fd, ¶m, false); __perf_close(stream_fd); for (int i = 32; i < 65; i++) { properties[7] = i; do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EINVAL); } } /* The lowest periodic sampling exponent equates to a period of 160 nanoseconds * or a frequency of 6.25MHz which is only possible to request as root by * default. By default the maximum OA sampling rate is 100KHz */ static void test_low_oa_exponent_permissions(void) { int max_freq = read_u64_file("/proc/sys/dev/i915/oa_max_sample_rate"); int bad_exponent = max_oa_exponent_for_freq_gt(max_freq); int ok_exponent = bad_exponent + 1; uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, bad_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; uint64_t oa_period, oa_freq; igt_assert_eq(max_freq, 100000); /* Avoid EACCES errors opening a stream without CAP_SYS_ADMIN */ write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 0); igt_fork(child, 1) { igt_drop_root(); do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EACCES); } igt_waitchildren(); properties[7] = ok_exponent; igt_fork(child, 1) { igt_drop_root(); stream_fd = __perf_open(drm_fd, ¶m, false); __perf_close(stream_fd); } igt_waitchildren(); oa_period = timebase_scale(2 << ok_exponent); oa_freq = NSEC_PER_SEC / oa_period; write_u64_file("/proc/sys/dev/i915/oa_max_sample_rate", oa_freq - 100); igt_fork(child, 1) { igt_drop_root(); do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m, EACCES); } igt_waitchildren(); /* restore the defaults */ write_u64_file("/proc/sys/dev/i915/oa_max_sample_rate", 100000); write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); } static void test_per_context_mode_unprivileged(void) { uint64_t properties[] = { /* Single context sampling */ DRM_I915_PERF_PROP_CTX_HANDLE, UINT64_MAX, /* updated below */ /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; /* should be default, but just to be sure... */ write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); igt_fork(child, 1) { drm_intel_context *context; drm_intel_bufmgr *bufmgr; uint32_t ctx_id = 0xffffffff; /* invalid id */ int ret; igt_drop_root(); bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096); context = drm_intel_gem_context_create(bufmgr); igt_assert(context); ret = drm_intel_gem_context_get_id(context, &ctx_id); igt_assert_eq(ret, 0); igt_assert_neq(ctx_id, 0xffffffff); properties[1] = ctx_id; stream_fd = __perf_open(drm_fd, ¶m, false); __perf_close(stream_fd); drm_intel_gem_context_destroy(context); drm_intel_bufmgr_destroy(bufmgr); } igt_waitchildren(); } static int64_t get_time(void) { struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts); return ts.tv_sec * 1000000000 + ts.tv_nsec; } /* Note: The interface doesn't currently provide strict guarantees or control * over the upper bound for how long it might take for a POLLIN event after * some OA report is written by the OA unit. * * The plan is to add a property later that gives some control over the maximum * latency, but for now we expect it is tuned for a fairly low latency * suitable for applications wanting to provide live feedback for captured * metrics. * * At the time of writing this test the driver was using a fixed 200Hz hrtimer * regardless of the OA sampling exponent. * * There is no lower bound since a stream configured for periodic sampling may * still contain other automatically triggered reports. * * What we try and check for here is that blocking reads don't return EAGAIN * and that we aren't spending any significant time burning the cpu in * kernelspace. */ static void test_blocking(void) { /* ~40 milliseconds * * Having a period somewhat > sysconf(_SC_CLK_TCK) helps to stop * scheduling (liable to kick in when we make blocking poll()s/reads) * from interfering with the test. */ int oa_exponent = max_oa_exponent_for_period_lte(40000000); uint64_t oa_period = oa_exponent_to_ns(oa_exponent); uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_DISABLED, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; uint8_t buf[1024 * 1024]; struct tms start_times; struct tms end_times; int64_t user_ns, kernel_ns; int64_t tick_ns = 1000000000 / sysconf(_SC_CLK_TCK); int64_t test_duration_ns = tick_ns * 1000; int max_iterations = (test_duration_ns / oa_period) + 2; int n_extra_iterations = 0; /* It's a bit tricky to put a lower limit here, but we expect a * relatively low latency for seeing reports, while we don't currently * give any control over this in the api. * * We assume a maximum latency of 6 millisecond to deliver a POLLIN and * read() after a new sample is written (46ms per iteration) considering * the knowledge that that the driver uses a 200Hz hrtimer (5ms period) * to check for data and giving some time to read(). */ int min_iterations = (test_duration_ns / (oa_period + 6000000ull)); int64_t start, end; int n = 0; stream_fd = __perf_open(drm_fd, ¶m, true /* prevent_pm */); times(&start_times); igt_debug("tick length = %dns, test duration = %"PRIu64"ns, min iter. = %d," " estimated max iter. = %d, oa_period = %"PRIu64"ns\n", (int)tick_ns, test_duration_ns, min_iterations, max_iterations, oa_period); /* In the loop we perform blocking polls while the HW is sampling at * ~25Hz, with the expectation that we spend most of our time blocked * in the kernel, and shouldn't be burning cpu cycles in the kernel in * association with this process (verified by looking at stime before * and after loop). * * We're looking to assert that less than 1% of the test duration is * spent in the kernel dealing with polling and read()ing. * * The test runs for a relatively long time considering the very low * resolution of stime in ticks of typically 10 milliseconds. Since we * don't know the fractional part of tick values we read from userspace * so our minimum threshold needs to be >= one tick since any * measurement might really be +- tick_ns (assuming we effectively get * floor(real_stime)). * * We Loop for 1000 x tick_ns so one tick corresponds to 0.1% * * Also enable the stream just before poll/read to minimize * the error delta. */ start = get_time(); do_ioctl(stream_fd, I915_PERF_IOCTL_ENABLE, 0); for (/* nop */; ((end = get_time()) - start) < test_duration_ns; /* nop */) { struct drm_i915_perf_record_header *header; bool timer_report_read = false; bool non_timer_report_read = false; int ret; while ((ret = read(stream_fd, buf, sizeof(buf))) < 0 && errno == EINTR) ; igt_assert(ret > 0); /* For Haswell reports don't contain a well defined reason * field we so assume all reports to be 'periodic'. For gen8+ * we want to to consider that the HW automatically writes some * non periodic reports (e.g. on context switch) which might * lead to more successful read()s than expected due to * periodic sampling and we don't want these extra reads to * cause the test to fail... */ if (intel_gen(devid) >= 8) { for (int offset = 0; offset < ret; offset += header->size) { header = (void *)(buf + offset); if (header->type == DRM_I915_PERF_RECORD_SAMPLE) { uint32_t *report = (void *)(header + 1); if (oa_report_is_periodic(oa_exponent, report)) timer_report_read = true; else non_timer_report_read = true; } } } if (non_timer_report_read && !timer_report_read) n_extra_iterations++; n++; } times(&end_times); /* Using nanosecond units is fairly silly here, given the tick in- * precision - ah well, it's consistent with the get_time() units. */ user_ns = (end_times.tms_utime - start_times.tms_utime) * tick_ns; kernel_ns = (end_times.tms_stime - start_times.tms_stime) * tick_ns; igt_debug("%d blocking reads during test with ~25Hz OA sampling (expect no more than %d)\n", n, max_iterations); igt_debug("%d extra iterations seen, not related to periodic sampling (e.g. context switches)\n", n_extra_iterations); igt_debug("time in userspace = %"PRIu64"ns (+-%dns) (start utime = %d, end = %d)\n", user_ns, (int)tick_ns, (int)start_times.tms_utime, (int)end_times.tms_utime); igt_debug("time in kernelspace = %"PRIu64"ns (+-%dns) (start stime = %d, end = %d)\n", kernel_ns, (int)tick_ns, (int)start_times.tms_stime, (int)end_times.tms_stime); /* With completely broken blocking (but also not returning an error) we * could end up with an open loop, */ igt_assert(n <= (max_iterations + n_extra_iterations)); /* Make sure the driver is reporting new samples with a reasonably * low latency... */ igt_assert(n > (min_iterations + n_extra_iterations)); igt_assert(kernel_ns <= (test_duration_ns / 100ull)); __perf_close(stream_fd); } static void test_polling(void) { /* ~40 milliseconds * * Having a period somewhat > sysconf(_SC_CLK_TCK) helps to stop * scheduling (liable to kick in when we make blocking poll()s/reads) * from interfering with the test. */ int oa_exponent = max_oa_exponent_for_period_lte(40000000); uint64_t oa_period = oa_exponent_to_ns(oa_exponent); uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_DISABLED | I915_PERF_FLAG_FD_NONBLOCK, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; uint8_t buf[1024 * 1024]; struct tms start_times; struct tms end_times; int64_t user_ns, kernel_ns; int64_t tick_ns = 1000000000 / sysconf(_SC_CLK_TCK); int64_t test_duration_ns = tick_ns * 1000; int max_iterations = (test_duration_ns / oa_period) + 2; int n_extra_iterations = 0; /* It's a bit tricky to put a lower limit here, but we expect a * relatively low latency for seeing reports, while we don't currently * give any control over this in the api. * * We assume a maximum latency of 6 millisecond to deliver a POLLIN and * read() after a new sample is written (46ms per iteration) considering * the knowledge that that the driver uses a 200Hz hrtimer (5ms period) * to check for data and giving some time to read(). */ int min_iterations = (test_duration_ns / (oa_period + 6000000ull)); int64_t start, end; int n = 0; stream_fd = __perf_open(drm_fd, ¶m, true /* prevent_pm */); times(&start_times); igt_debug("tick length = %dns, test duration = %"PRIu64"ns, min iter. = %d, max iter. = %d\n", (int)tick_ns, test_duration_ns, min_iterations, max_iterations); /* In the loop we perform blocking polls while the HW is sampling at * ~25Hz, with the expectation that we spend most of our time blocked * in the kernel, and shouldn't be burning cpu cycles in the kernel in * association with this process (verified by looking at stime before * and after loop). * * We're looking to assert that less than 1% of the test duration is * spent in the kernel dealing with polling and read()ing. * * The test runs for a relatively long time considering the very low * resolution of stime in ticks of typically 10 milliseconds. Since we * don't know the fractional part of tick values we read from userspace * so our minimum threshold needs to be >= one tick since any * measurement might really be +- tick_ns (assuming we effectively get * floor(real_stime)). * * We Loop for 1000 x tick_ns so one tick corresponds to 0.1% * * Also enable the stream just before poll/read to minimize * the error delta. */ start = get_time(); do_ioctl(stream_fd, I915_PERF_IOCTL_ENABLE, 0); for (/* nop */; ((end = get_time()) - start) < test_duration_ns; /* nop */) { struct pollfd pollfd = { .fd = stream_fd, .events = POLLIN }; struct drm_i915_perf_record_header *header; bool timer_report_read = false; bool non_timer_report_read = false; int ret; while ((ret = poll(&pollfd, 1, -1)) < 0 && errno == EINTR) ; igt_assert_eq(ret, 1); igt_assert(pollfd.revents & POLLIN); while ((ret = read(stream_fd, buf, sizeof(buf))) < 0 && errno == EINTR) ; /* Don't expect to see EAGAIN if we've had a POLLIN event * * XXX: actually this is technically overly strict since we do * knowingly allow false positive POLLIN events. At least in * the future when supporting context filtering of metrics for * Gen8+ handled in the kernel then POLLIN events may be * delivered when we know there are pending reports to process * but before we've done any filtering to know for certain that * any reports are destined to be copied to userspace. * * Still, for now it's a reasonable sanity check. */ if (ret < 0) igt_debug("Unexpected error when reading after poll = %d\n", errno); igt_assert_neq(ret, -1); /* For Haswell reports don't contain a well defined reason * field we so assume all reports to be 'periodic'. For gen8+ * we want to to consider that the HW automatically writes some * non periodic reports (e.g. on context switch) which might * lead to more successful read()s than expected due to * periodic sampling and we don't want these extra reads to * cause the test to fail... */ if (intel_gen(devid) >= 8) { for (int offset = 0; offset < ret; offset += header->size) { header = (void *)(buf + offset); if (header->type == DRM_I915_PERF_RECORD_SAMPLE) { uint32_t *report = (void *)(header + 1); if (oa_report_is_periodic(oa_exponent, report)) timer_report_read = true; else non_timer_report_read = true; } } } if (non_timer_report_read && !timer_report_read) n_extra_iterations++; /* At this point, after consuming pending reports (and hoping * the scheduler hasn't stopped us for too long we now * expect EAGAIN on read. */ while ((ret = read(stream_fd, buf, sizeof(buf))) < 0 && errno == EINTR) ; igt_assert_eq(ret, -1); igt_assert_eq(errno, EAGAIN); n++; } times(&end_times); /* Using nanosecond units is fairly silly here, given the tick in- * precision - ah well, it's consistent with the get_time() units. */ user_ns = (end_times.tms_utime - start_times.tms_utime) * tick_ns; kernel_ns = (end_times.tms_stime - start_times.tms_stime) * tick_ns; igt_debug("%d blocking reads during test with ~25Hz OA sampling (expect no more than %d)\n", n, max_iterations); igt_debug("%d extra iterations seen, not related to periodic sampling (e.g. context switches)\n", n_extra_iterations); igt_debug("time in userspace = %"PRIu64"ns (+-%dns) (start utime = %d, end = %d)\n", user_ns, (int)tick_ns, (int)start_times.tms_utime, (int)end_times.tms_utime); igt_debug("time in kernelspace = %"PRIu64"ns (+-%dns) (start stime = %d, end = %d)\n", kernel_ns, (int)tick_ns, (int)start_times.tms_stime, (int)end_times.tms_stime); /* With completely broken blocking while polling (but still somehow * reporting a POLLIN event) we could end up with an open loop. */ igt_assert(n <= (max_iterations + n_extra_iterations)); /* Make sure the driver is reporting new samples with a reasonably * low latency... */ igt_assert(n > (min_iterations + n_extra_iterations)); igt_assert(kernel_ns <= (test_duration_ns / 100ull)); __perf_close(stream_fd); } static void test_buffer_fill(void) { /* ~5 micro second period */ int oa_exponent = max_oa_exponent_for_period_lte(5000); uint64_t oa_period = oa_exponent_to_ns(oa_exponent); uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; struct drm_i915_perf_record_header *header; int buf_size = 65536 * (256 + sizeof(struct drm_i915_perf_record_header)); uint8_t *buf = malloc(buf_size); int len; size_t oa_buf_size = MAX_OA_BUF_SIZE; size_t report_size = get_oa_format(test_oa_format).size; int n_full_oa_reports = oa_buf_size / report_size; uint64_t fill_duration = n_full_oa_reports * oa_period; igt_assert(fill_duration < 1000000000); stream_fd = __perf_open(drm_fd, ¶m, true /* prevent_pm */); for (int i = 0; i < 5; i++) { bool overflow_seen; uint32_t n_periodic_reports; uint32_t first_timestamp = 0, last_timestamp = 0; uint32_t last_periodic_report[64]; do_ioctl(stream_fd, I915_PERF_IOCTL_ENABLE, 0); nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = fill_duration * 1.25 }, NULL); while ((len = read(stream_fd, buf, buf_size)) == -1 && errno == EINTR) ; igt_assert_neq(len, -1); overflow_seen = false; for (int offset = 0; offset < len; offset += header->size) { header = (void *)(buf + offset); if (header->type == DRM_I915_PERF_RECORD_OA_BUFFER_LOST) overflow_seen = true; } igt_assert_eq(overflow_seen, true); do_ioctl(stream_fd, I915_PERF_IOCTL_DISABLE, 0); igt_debug("fill_duration = %"PRIu64"ns, oa_exponent = %u\n", fill_duration, oa_exponent); do_ioctl(stream_fd, I915_PERF_IOCTL_ENABLE, 0); nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = fill_duration / 2 }, NULL); n_periodic_reports = 0; /* Because of the race condition between notification of new * reports and reports landing in memory, we need to rely on * timestamps to figure whether we've read enough of them. */ while (((last_timestamp - first_timestamp) * oa_period) < (fill_duration / 2)) { igt_debug("dts=%u elapsed=%"PRIu64" duration=%"PRIu64"\n", last_timestamp - first_timestamp, (last_timestamp - first_timestamp) * oa_period, fill_duration / 2); while ((len = read(stream_fd, buf, buf_size)) == -1 && errno == EINTR) ; igt_assert_neq(len, -1); for (int offset = 0; offset < len; offset += header->size) { uint32_t *report; header = (void *) (buf + offset); report = (void *) (header + 1); switch (header->type) { case DRM_I915_PERF_RECORD_OA_REPORT_LOST: igt_debug("report loss, trying again\n"); break; case DRM_I915_PERF_RECORD_SAMPLE: igt_debug(" > report ts=%u" " ts_delta_last_periodic=%8u is_timer=%i ctx_id=%8x nb_periodic=%u\n", report[1], n_periodic_reports > 0 ? report[1] - last_periodic_report[1] : 0, oa_report_is_periodic(oa_exponent, report), oa_report_get_ctx_id(report), n_periodic_reports); if (first_timestamp == 0) first_timestamp = report[1]; last_timestamp = report[1]; if (oa_report_is_periodic(oa_exponent, report)) { memcpy(last_periodic_report, report, sizeof(last_periodic_report)); n_periodic_reports++; } break; case DRM_I915_PERF_RECORD_OA_BUFFER_LOST: igt_assert(!"unexpected overflow"); break; } } } do_ioctl(stream_fd, I915_PERF_IOCTL_DISABLE, 0); igt_debug("%f < %zu < %f\n", report_size * n_full_oa_reports * 0.45, n_periodic_reports * report_size, report_size * n_full_oa_reports * 0.55); igt_assert(n_periodic_reports * report_size > report_size * n_full_oa_reports * 0.45); igt_assert(n_periodic_reports * report_size < report_size * n_full_oa_reports * 0.55); } free(buf); __perf_close(stream_fd); } static void test_enable_disable(void) { /* ~5 micro second period */ int oa_exponent = max_oa_exponent_for_period_lte(5000); uint64_t oa_period = oa_exponent_to_ns(oa_exponent); uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_DISABLED, /* Verify we start disabled */ .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; int buf_size = 65536 * (256 + sizeof(struct drm_i915_perf_record_header)); uint8_t *buf = malloc(buf_size); size_t oa_buf_size = MAX_OA_BUF_SIZE; size_t report_size = get_oa_format(test_oa_format).size; int n_full_oa_reports = oa_buf_size / report_size; uint64_t fill_duration = n_full_oa_reports * oa_period; load_helper_init(); load_helper_run(HIGH); stream_fd = __perf_open(drm_fd, ¶m, true /* prevent_pm */); for (int i = 0; i < 5; i++) { int len; uint32_t n_periodic_reports; struct drm_i915_perf_record_header *header; uint32_t first_timestamp = 0, last_timestamp = 0; uint32_t last_periodic_report[64]; /* Giving enough time for an overflow might help catch whether * the OA unit has been enabled even if the driver might at * least avoid copying reports while disabled. */ nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = fill_duration * 1.25 }, NULL); while ((len = read(stream_fd, buf, buf_size)) == -1 && errno == EINTR) ; igt_assert_eq(len, -1); igt_assert_eq(errno, EIO); do_ioctl(stream_fd, I915_PERF_IOCTL_ENABLE, 0); nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = fill_duration / 2 }, NULL); n_periodic_reports = 0; /* Because of the race condition between notification of new * reports and reports landing in memory, we need to rely on * timestamps to figure whether we've read enough of them. */ while (((last_timestamp - first_timestamp) * oa_period) < (fill_duration / 2)) { while ((len = read(stream_fd, buf, buf_size)) == -1 && errno == EINTR) ; igt_assert_neq(len, -1); for (int offset = 0; offset < len; offset += header->size) { uint32_t *report; header = (void *) (buf + offset); report = (void *) (header + 1); switch (header->type) { case DRM_I915_PERF_RECORD_OA_REPORT_LOST: break; case DRM_I915_PERF_RECORD_SAMPLE: if (first_timestamp == 0) first_timestamp = report[1]; last_timestamp = report[1]; igt_debug(" > report ts=%8x" " ts_delta_last_periodic=%s%8u" " is_timer=%i ctx_id=0x%8x\n", report[1], oa_report_is_periodic(oa_exponent, report) ? " " : "*", n_periodic_reports > 0 ? (report[1] - last_periodic_report[1]) : 0, oa_report_is_periodic(oa_exponent, report), oa_report_get_ctx_id(report)); if (oa_report_is_periodic(oa_exponent, report)) { memcpy(last_periodic_report, report, sizeof(last_periodic_report)); /* We want to measure only the * periodic reports, ctx-switch * might inflate the content of * the buffer and skew or * measurement. */ n_periodic_reports++; } break; case DRM_I915_PERF_RECORD_OA_BUFFER_LOST: igt_assert(!"unexpected overflow"); break; } } } do_ioctl(stream_fd, I915_PERF_IOCTL_DISABLE, 0); igt_debug("%f < %zu < %f\n", report_size * n_full_oa_reports * 0.45, n_periodic_reports * report_size, report_size * n_full_oa_reports * 0.55); igt_assert((n_periodic_reports * report_size) > (report_size * n_full_oa_reports * 0.45)); igt_assert((n_periodic_reports * report_size) < report_size * n_full_oa_reports * 0.55); /* It's considered an error to read a stream while it's disabled * since it would block indefinitely... */ len = read(stream_fd, buf, buf_size); igt_assert_eq(len, -1); igt_assert_eq(errno, EIO); } free(buf); __perf_close(stream_fd); load_helper_stop(); load_helper_fini(); } static void test_short_reads(void) { int oa_exponent = max_oa_exponent_for_period_lte(5000); uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; size_t record_size = 256 + sizeof(struct drm_i915_perf_record_header); size_t page_size = sysconf(_SC_PAGE_SIZE); int zero_fd = open("/dev/zero", O_RDWR|O_CLOEXEC); uint8_t *pages = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE, MAP_PRIVATE, zero_fd, 0); struct drm_i915_perf_record_header *header; int ret; igt_assert_neq(zero_fd, -1); close(zero_fd); zero_fd = -1; igt_assert(pages); ret = mprotect(pages + page_size, page_size, PROT_NONE); igt_assert_eq(ret, 0); stream_fd = __perf_open(drm_fd, ¶m, false); nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = 5000000 }, NULL); /* At this point there should be lots of pending reports to read */ /* A read that can return at least one record should result in a short * read not an EFAULT if the buffer is smaller than the requested read * size... * * Expect to see a sample record here, but at least skip over any * _RECORD_LOST notifications. */ do { header = (void *)(pages + page_size - record_size); ret = read(stream_fd, header, page_size); igt_assert(ret > 0); } while (header->type == DRM_I915_PERF_RECORD_OA_REPORT_LOST); igt_assert_eq(ret, record_size); /* A read that can't return a single record because it would result * in a fault on buffer overrun should result in an EFAULT error... */ ret = read(stream_fd, pages + page_size - 16, page_size); igt_assert_eq(ret, -1); igt_assert_eq(errno, EFAULT); /* A read that can't return a single record because the buffer is too * small should result in an ENOSPC error.. * * Again, skip over _RECORD_LOST records (smaller than record_size/2) */ do { header = (void *)(pages + page_size - record_size / 2); ret = read(stream_fd, header, record_size / 2); } while (ret > 0 && header->type == DRM_I915_PERF_RECORD_OA_REPORT_LOST); igt_assert_eq(ret, -1); igt_assert_eq(errno, ENOSPC); __perf_close(stream_fd); munmap(pages, page_size * 2); } static void test_non_sampling_read_error(void) { uint64_t properties[] = { /* XXX: even without periodic sampling we have to * specify at least one sample layout property... */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, /* XXX: no sampling exponent */ }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; int ret; uint8_t buf[1024]; stream_fd = __perf_open(drm_fd, ¶m, false); ret = read(stream_fd, buf, sizeof(buf)); igt_assert_eq(ret, -1); igt_assert_eq(errno, EIO); __perf_close(stream_fd); } /* Check that attempts to read from a stream while it is disable will return * EIO instead of blocking indefinitely. */ static void test_disabled_read_error(void) { int oa_exponent = 5; /* 5 micro seconds */ uint64_t properties[] = { /* XXX: even without periodic sampling we have to * specify at least one sample layout property... */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_DISABLED, /* XXX: open disabled */ .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; uint32_t oa_report0[64]; uint32_t oa_report1[64]; uint32_t buf[128] = { 0 }; int ret; stream_fd = __perf_open(drm_fd, ¶m, false); ret = read(stream_fd, buf, sizeof(buf)); igt_assert_eq(ret, -1); igt_assert_eq(errno, EIO); __perf_close(stream_fd); param.flags &= ~I915_PERF_FLAG_DISABLED; stream_fd = __perf_open(drm_fd, ¶m, false); read_2_oa_reports(test_oa_format, oa_exponent, oa_report0, oa_report1, false); /* not just timer reports */ do_ioctl(stream_fd, I915_PERF_IOCTL_DISABLE, 0); ret = read(stream_fd, buf, sizeof(buf)); igt_assert_eq(ret, -1); igt_assert_eq(errno, EIO); do_ioctl(stream_fd, I915_PERF_IOCTL_ENABLE, 0); read_2_oa_reports(test_oa_format, oa_exponent, oa_report0, oa_report1, false); /* not just timer reports */ __perf_close(stream_fd); } static void test_mi_rpc(void) { uint64_t properties[] = { /* Note: we have to specify at least one sample property even * though we aren't interested in samples in this case. */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, /* Note: no OA exponent specified in this case */ }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; drm_intel_bufmgr *bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096); drm_intel_context *context; struct intel_batchbuffer *batch; drm_intel_bo *bo; uint32_t *report32; int ret; stream_fd = __perf_open(drm_fd, ¶m, false); drm_intel_bufmgr_gem_enable_reuse(bufmgr); context = drm_intel_gem_context_create(bufmgr); igt_assert(context); batch = intel_batchbuffer_alloc(bufmgr, devid); bo = drm_intel_bo_alloc(bufmgr, "mi_rpc dest bo", 4096, 64); ret = drm_intel_bo_map(bo, true); igt_assert_eq(ret, 0); memset(bo->virtual, 0x80, 4096); drm_intel_bo_unmap(bo); emit_report_perf_count(batch, bo, /* dst */ 0, /* dst offset in bytes */ 0xdeadbeef); /* report ID */ intel_batchbuffer_flush_with_context(batch, context); ret = drm_intel_bo_map(bo, false /* write enable */); igt_assert_eq(ret, 0); report32 = bo->virtual; igt_assert_eq(report32[0], 0xdeadbeef); /* report ID */ igt_assert_neq(report32[1], 0); /* timestamp */ igt_assert_neq(report32[63], 0x80808080); /* end of report */ igt_assert_eq(report32[64], 0x80808080); /* after 256 byte report */ drm_intel_bo_unmap(bo); drm_intel_bo_unreference(bo); intel_batchbuffer_free(batch); drm_intel_gem_context_destroy(context); drm_intel_bufmgr_destroy(bufmgr); __perf_close(stream_fd); } static void emit_stall_timestamp_and_rpc(struct intel_batchbuffer *batch, drm_intel_bo *dst, int timestamp_offset, int report_dst_offset, uint32_t report_id) { uint32_t pipe_ctl_flags = (PIPE_CONTROL_CS_STALL | PIPE_CONTROL_RENDER_TARGET_FLUSH | PIPE_CONTROL_WRITE_TIMESTAMP); if (intel_gen(devid) >= 8) { BEGIN_BATCH(5, 1); OUT_BATCH(GFX_OP_PIPE_CONTROL | (6 - 2)); OUT_BATCH(pipe_ctl_flags); OUT_RELOC(dst, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, timestamp_offset); OUT_BATCH(0); /* imm lower */ OUT_BATCH(0); /* imm upper */ ADVANCE_BATCH(); } else { BEGIN_BATCH(5, 1); OUT_BATCH(GFX_OP_PIPE_CONTROL | (5 - 2)); OUT_BATCH(pipe_ctl_flags); OUT_RELOC(dst, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, timestamp_offset); OUT_BATCH(0); /* imm lower */ OUT_BATCH(0); /* imm upper */ ADVANCE_BATCH(); } emit_report_perf_count(batch, dst, report_dst_offset, report_id); } /* Tests the INTEL_performance_query use case where an unprivileged process * should be able to configure the OA unit for per-context metrics (for a * context associated with that process' drm file descriptor) and the counters * should only relate to that specific context. * * Unfortunately only Haswell limits the progression of OA counters for a * single context and so this unit test is Haswell specific. For Gen8+ although * reports read via i915 perf can be filtered for a single context the counters * themselves always progress as global/system-wide counters affected by all * contexts. */ static void hsw_test_single_ctx_counters(void) { uint64_t properties[] = { DRM_I915_PERF_PROP_CTX_HANDLE, UINT64_MAX, /* updated below */ /* Note: we have to specify at least one sample property even * though we aren't interested in samples in this case */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, /* Note: no OA exponent specified in this case */ }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; /* should be default, but just to be sure... */ write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); igt_fork(child, 1) { drm_intel_bufmgr *bufmgr; drm_intel_context *context0, *context1; struct intel_batchbuffer *batch; struct igt_buf src[3], dst[3]; drm_intel_bo *bo; uint32_t *report0_32, *report1_32; uint64_t timestamp0_64, timestamp1_64; uint32_t delta_ts64, delta_oa32; uint64_t delta_ts64_ns, delta_oa32_ns; uint32_t delta_delta; int n_samples_written; int width = 800; int height = 600; uint32_t ctx_id = 0xffffffff; /* invalid id */ int ret; igt_drop_root(); bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096); drm_intel_bufmgr_gem_enable_reuse(bufmgr); for (int i = 0; i < ARRAY_SIZE(src); i++) { scratch_buf_init(bufmgr, &src[i], width, height, 0xff0000ff); scratch_buf_init(bufmgr, &dst[i], width, height, 0x00ff00ff); } batch = intel_batchbuffer_alloc(bufmgr, devid); context0 = drm_intel_gem_context_create(bufmgr); igt_assert(context0); context1 = drm_intel_gem_context_create(bufmgr); igt_assert(context1); igt_debug("submitting warm up render_copy\n"); /* Submit some early, unmeasured, work to the context we want * to measure to try and catch issues with i915-perf * initializing the HW context ID for filtering. * * We do this because i915-perf single context filtering had * previously only relied on a hook into context pinning to * initialize the HW context ID, instead of also trying to * determine the HW ID while opening the stream, in case it * has already been pinned. * * This wasn't noticed by the previous unit test because we * were opening the stream while the context hadn't been * touched or pinned yet and so it worked out correctly to wait * for the pinning hook. * * Now a buggy version of i915-perf will fail to measure * anything for context0 once this initial render_copy() ends * up pinning the context since there won't ever be a pinning * hook callback. */ render_copy(batch, context0, &src[0], 0, 0, width, height, &dst[0], 0, 0); ret = drm_intel_gem_context_get_id(context0, &ctx_id); igt_assert_eq(ret, 0); igt_assert_neq(ctx_id, 0xffffffff); properties[1] = ctx_id; intel_batchbuffer_flush_with_context(batch, context0); scratch_buf_memset(src[0].bo, width, height, 0xff0000ff); scratch_buf_memset(dst[0].bo, width, height, 0x00ff00ff); igt_debug("opening i915-perf stream\n"); stream_fd = __perf_open(drm_fd, ¶m, false); bo = drm_intel_bo_alloc(bufmgr, "mi_rpc dest bo", 4096, 64); ret = drm_intel_bo_map(bo, true /* write enable */); igt_assert_eq(ret, 0); memset(bo->virtual, 0x80, 4096); drm_intel_bo_unmap(bo); emit_stall_timestamp_and_rpc(batch, bo, 512 /* timestamp offset */, 0, /* report dst offset */ 0xdeadbeef); /* report id */ /* Explicitly flush here (even though the render_copy() call * will itself flush before/after the copy) to clarify that * that the PIPE_CONTROL + MI_RPC commands will be in a * separate batch from the copy. */ intel_batchbuffer_flush_with_context(batch, context0); render_copy(batch, context0, &src[0], 0, 0, width, height, &dst[0], 0, 0); /* Another redundant flush to clarify batch bo is free to reuse */ intel_batchbuffer_flush_with_context(batch, context0); /* submit two copies on the other context to avoid a false * positive in case the driver somehow ended up filtering for * context1 */ render_copy(batch, context1, &src[1], 0, 0, width, height, &dst[1], 0, 0); render_copy(batch, context1, &src[2], 0, 0, width, height, &dst[2], 0, 0); /* And another */ intel_batchbuffer_flush_with_context(batch, context1); emit_stall_timestamp_and_rpc(batch, bo, 520 /* timestamp offset */, 256, /* report dst offset */ 0xbeefbeef); /* report id */ intel_batchbuffer_flush_with_context(batch, context0); ret = drm_intel_bo_map(bo, false /* write enable */); igt_assert_eq(ret, 0); report0_32 = bo->virtual; igt_assert_eq(report0_32[0], 0xdeadbeef); /* report ID */ igt_assert_neq(report0_32[1], 0); /* timestamp */ report1_32 = report0_32 + 64; igt_assert_eq(report1_32[0], 0xbeefbeef); /* report ID */ igt_assert_neq(report1_32[1], 0); /* timestamp */ print_reports(report0_32, report1_32, lookup_format(test_oa_format)); /* A40 == N samples written to all render targets */ n_samples_written = report1_32[43] - report0_32[43]; igt_debug("n samples written = %d\n", n_samples_written); igt_assert_eq(n_samples_written, width * height); igt_debug("timestamp32 0 = %u\n", report0_32[1]); igt_debug("timestamp32 1 = %u\n", report1_32[1]); timestamp0_64 = *(uint64_t *)(((uint8_t *)bo->virtual) + 512); timestamp1_64 = *(uint64_t *)(((uint8_t *)bo->virtual) + 520); igt_debug("timestamp64 0 = %"PRIu64"\n", timestamp0_64); igt_debug("timestamp64 1 = %"PRIu64"\n", timestamp1_64); delta_ts64 = timestamp1_64 - timestamp0_64; delta_oa32 = report1_32[1] - report0_32[1]; /* sanity check that we can pass the delta to timebase_scale */ igt_assert(delta_ts64 < UINT32_MAX); delta_oa32_ns = timebase_scale(delta_oa32); delta_ts64_ns = timebase_scale(delta_ts64); igt_debug("ts32 delta = %u, = %uns\n", delta_oa32, (unsigned)delta_oa32_ns); igt_debug("ts64 delta = %u, = %uns\n", delta_ts64, (unsigned)delta_ts64_ns); /* The delta as calculated via the PIPE_CONTROL timestamp or * the OA report timestamps should be almost identical but * allow a 320 nanoseconds margin. */ delta_delta = delta_ts64_ns > delta_oa32_ns ? (delta_ts64_ns - delta_oa32_ns) : (delta_oa32_ns - delta_ts64_ns); igt_assert(delta_delta <= 320); for (int i = 0; i < ARRAY_SIZE(src); i++) { drm_intel_bo_unreference(src[i].bo); drm_intel_bo_unreference(dst[i].bo); } drm_intel_bo_unmap(bo); drm_intel_bo_unreference(bo); intel_batchbuffer_free(batch); drm_intel_gem_context_destroy(context0); drm_intel_gem_context_destroy(context1); drm_intel_bufmgr_destroy(bufmgr); __perf_close(stream_fd); } igt_waitchildren(); } /* Tests the INTEL_performance_query use case where an unprivileged process * should be able to configure the OA unit for per-context metrics (for a * context associated with that process' drm file descriptor) and the counters * should only relate to that specific context. * * For Gen8+ although reports read via i915 perf can be filtered for a single * context the counters themselves always progress as global/system-wide * counters affected by all contexts. To support the INTEL_performance_query * use case on Gen8+ it's necessary to combine OABUFFER and * MI_REPORT_PERF_COUNT reports so that counter normalisation can take into * account context-switch reports and factor out any counter progression not * associated with the current context. */ static void gen8_test_single_ctx_render_target_writes_a_counter(void) { int oa_exponent = max_oa_exponent_for_period_lte(1000000); uint64_t properties[] = { DRM_I915_PERF_PROP_CTX_HANDLE, UINT64_MAX, /* updated below */ /* Note: we have to specify at least one sample property even * though we aren't interested in samples in this case */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exponent, /* Note: no OA exponent specified in this case */ }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = ARRAY_SIZE(properties) / 2, .properties_ptr = to_user_pointer(properties), }; size_t format_size = get_oa_format(test_oa_format).size; size_t sample_size = (sizeof(struct drm_i915_perf_record_header) + format_size); int max_reports = MAX_OA_BUF_SIZE / format_size; int buf_size = sample_size * max_reports * 1.5; int child_ret; uint8_t *buf = malloc(buf_size); ssize_t len; struct igt_helper_process child = {}; /* should be default, but just to be sure... */ write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); do { igt_fork_helper(&child) { struct drm_i915_perf_record_header *header; drm_intel_bufmgr *bufmgr; drm_intel_context *context0, *context1; struct intel_batchbuffer *batch; struct igt_buf src[3], dst[3]; drm_intel_bo *bo; uint32_t *report0_32, *report1_32; uint32_t *prev, *lprev = NULL; uint64_t timestamp0_64, timestamp1_64; uint32_t delta_ts64, delta_oa32; uint64_t delta_ts64_ns, delta_oa32_ns; uint32_t delta_delta; int width = 800; int height = 600; uint32_t ctx_id = 0xffffffff; /* invalid handle */ uint32_t ctx1_id = 0xffffffff; /* invalid handle */ uint32_t current_ctx_id = 0xffffffff; uint32_t n_invalid_ctx = 0; int ret; struct accumulator accumulator = { .format = test_oa_format }; bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096); drm_intel_bufmgr_gem_enable_reuse(bufmgr); for (int i = 0; i < ARRAY_SIZE(src); i++) { scratch_buf_init(bufmgr, &src[i], width, height, 0xff0000ff); scratch_buf_init(bufmgr, &dst[i], width, height, 0x00ff00ff); } batch = intel_batchbuffer_alloc(bufmgr, devid); context0 = drm_intel_gem_context_create(bufmgr); igt_assert(context0); context1 = drm_intel_gem_context_create(bufmgr); igt_assert(context1); igt_debug("submitting warm up render_copy\n"); /* Submit some early, unmeasured, work to the context we want * to measure to try and catch issues with i915-perf * initializing the HW context ID for filtering. * * We do this because i915-perf single context filtering had * previously only relied on a hook into context pinning to * initialize the HW context ID, instead of also trying to * determine the HW ID while opening the stream, in case it * has already been pinned. * * This wasn't noticed by the previous unit test because we * were opening the stream while the context hadn't been * touched or pinned yet and so it worked out correctly to wait * for the pinning hook. * * Now a buggy version of i915-perf will fail to measure * anything for context0 once this initial render_copy() ends * up pinning the context since there won't ever be a pinning * hook callback. */ render_copy(batch, context0, &src[0], 0, 0, width, height, &dst[0], 0, 0); ret = drm_intel_gem_context_get_id(context0, &ctx_id); igt_assert_eq(ret, 0); igt_assert_neq(ctx_id, 0xffffffff); properties[1] = ctx_id; scratch_buf_memset(src[0].bo, width, height, 0xff0000ff); scratch_buf_memset(dst[0].bo, width, height, 0x00ff00ff); igt_debug("opening i915-perf stream\n"); stream_fd = __perf_open(drm_fd, ¶m, false); bo = drm_intel_bo_alloc(bufmgr, "mi_rpc dest bo", 4096, 64); ret = drm_intel_bo_map(bo, true /* write enable */); igt_assert_eq(ret, 0); memset(bo->virtual, 0x80, 4096); drm_intel_bo_unmap(bo); emit_stall_timestamp_and_rpc(batch, bo, 512 /* timestamp offset */, 0, /* report dst offset */ 0xdeadbeef); /* report id */ /* Explicitly flush here (even though the render_copy() call * will itself flush before/after the copy) to clarify that * that the PIPE_CONTROL + MI_RPC commands will be in a * separate batch from the copy. */ intel_batchbuffer_flush_with_context(batch, context0); render_copy(batch, context0, &src[0], 0, 0, width, height, &dst[0], 0, 0); /* Another redundant flush to clarify batch bo is free to reuse */ intel_batchbuffer_flush_with_context(batch, context0); /* submit two copies on the other context to avoid a false * positive in case the driver somehow ended up filtering for * context1 */ render_copy(batch, context1, &src[1], 0, 0, width, height, &dst[1], 0, 0); ret = drm_intel_gem_context_get_id(context1, &ctx1_id); igt_assert_eq(ret, 0); igt_assert_neq(ctx1_id, 0xffffffff); render_copy(batch, context1, &src[2], 0, 0, width, height, &dst[2], 0, 0); /* And another */ intel_batchbuffer_flush_with_context(batch, context1); emit_stall_timestamp_and_rpc(batch, bo, 520 /* timestamp offset */, 256, /* report dst offset */ 0xbeefbeef); /* report id */ intel_batchbuffer_flush_with_context(batch, context1); ret = drm_intel_bo_map(bo, false /* write enable */); igt_assert_eq(ret, 0); report0_32 = bo->virtual; igt_assert_eq(report0_32[0], 0xdeadbeef); /* report ID */ igt_assert_neq(report0_32[1], 0); /* timestamp */ prev = report0_32; ctx_id = prev[2]; igt_debug("MI_RPC(start) CTX ID: %u\n", ctx_id); report1_32 = report0_32 + 64; /* 64 uint32_t = 256bytes offset */ igt_assert_eq(report1_32[0], 0xbeefbeef); /* report ID */ igt_assert_neq(report1_32[1], 0); /* timestamp */ ctx1_id = report1_32[2]; memset(accumulator.deltas, 0, sizeof(accumulator.deltas)); accumulate_reports(&accumulator, report0_32, report1_32); igt_debug("total: A0 = %"PRIu64", A21 = %"PRIu64", A26 = %"PRIu64"\n", accumulator.deltas[2 + 0], /* skip timestamp + clock cycles */ accumulator.deltas[2 + 21], accumulator.deltas[2 + 26]); igt_debug("oa_timestamp32 0 = %u\n", report0_32[1]); igt_debug("oa_timestamp32 1 = %u\n", report1_32[1]); igt_debug("ctx_id 0 = %u\n", report0_32[2]); igt_debug("ctx_id 1 = %u\n", report1_32[2]); timestamp0_64 = *(uint64_t *)(((uint8_t *)bo->virtual) + 512); timestamp1_64 = *(uint64_t *)(((uint8_t *)bo->virtual) + 520); igt_debug("ts_timestamp64 0 = %"PRIu64"\n", timestamp0_64); igt_debug("ts_timestamp64 1 = %"PRIu64"\n", timestamp1_64); delta_ts64 = timestamp1_64 - timestamp0_64; delta_oa32 = report1_32[1] - report0_32[1]; /* sanity check that we can pass the delta to timebase_scale */ igt_assert(delta_ts64 < UINT32_MAX); delta_oa32_ns = timebase_scale(delta_oa32); delta_ts64_ns = timebase_scale(delta_ts64); igt_debug("oa32 delta = %u, = %uns\n", delta_oa32, (unsigned)delta_oa32_ns); igt_debug("ts64 delta = %u, = %uns\n", delta_ts64, (unsigned)delta_ts64_ns); /* The delta as calculated via the PIPE_CONTROL timestamp or * the OA report timestamps should be almost identical but * allow a 500 nanoseconds margin. */ delta_delta = delta_ts64_ns > delta_oa32_ns ? (delta_ts64_ns - delta_oa32_ns) : (delta_oa32_ns - delta_ts64_ns); if (delta_delta > 500) { igt_debug("skipping\n"); exit(EAGAIN); } len = i915_read_reports_until_timestamp(test_oa_format, buf, buf_size, report0_32[1], report1_32[1]); igt_assert(len > 0); igt_debug("read %d bytes\n", (int)len); memset(accumulator.deltas, 0, sizeof(accumulator.deltas)); for (size_t offset = 0; offset < len; offset += header->size) { uint32_t *report; uint32_t reason; const char *skip_reason = NULL, *report_reason = NULL; struct accumulator laccumulator = { .format = test_oa_format }; header = (void *)(buf + offset); igt_assert_eq(header->pad, 0); /* Reserved */ /* Currently the only test that should ever expect to * see a _BUFFER_LOST error is the buffer_fill test, * otherwise something bad has probably happened... */ igt_assert_neq(header->type, DRM_I915_PERF_RECORD_OA_BUFFER_LOST); /* At high sampling frequencies the OA HW might not be * able to cope with all write requests and will notify * us that a report was lost. * * XXX: we should maybe restart the test in this case? */ if (header->type == DRM_I915_PERF_RECORD_OA_REPORT_LOST) { igt_debug("OA trigger collision / report lost\n"); exit(EAGAIN); } /* Currently the only other record type expected is a * _SAMPLE. Notably this test will need updating if * i915-perf is extended in the future with additional * record types. */ igt_assert_eq(header->type, DRM_I915_PERF_RECORD_SAMPLE); igt_assert_eq(header->size, sample_size); report = (void *)(header + 1); /* Don't expect zero for timestamps */ igt_assert_neq(report[1], 0); igt_debug("report %p:\n", report); /* Discard reports not contained in between the * timestamps we're looking at. */ { uint32_t time_delta = report[1] - report0_32[1]; if (timebase_scale(time_delta) > 1000000000) { skip_reason = "prior first mi-rpc"; } } { uint32_t time_delta = report[1] - report1_32[1]; if (timebase_scale(time_delta) <= 1000000000) { igt_debug(" comes after last MI_RPC (%u)\n", report1_32[1]); report = report1_32; } } /* Print out deltas for a few significant * counters for each report. */ if (lprev) { memset(laccumulator.deltas, 0, sizeof(laccumulator.deltas)); accumulate_reports(&laccumulator, lprev, report); igt_debug(" deltas: A0=%"PRIu64" A21=%"PRIu64", A26=%"PRIu64"\n", laccumulator.deltas[2 + 0], /* skip timestamp + clock cycles */ laccumulator.deltas[2 + 21], laccumulator.deltas[2 + 26]); } lprev = report; /* Print out reason for the report. */ reason = ((report[0] >> OAREPORT_REASON_SHIFT) & OAREPORT_REASON_MASK); if (reason & OAREPORT_REASON_CTX_SWITCH) { report_reason = "ctx-load"; } else if (reason & OAREPORT_REASON_TIMER) { report_reason = "timer"; } else if (reason & OAREPORT_REASON_INTERNAL || reason & OAREPORT_REASON_GO || reason & OAREPORT_REASON_CLK_RATIO) { report_reason = "internal/go/clk-ratio"; } else { report_reason = "end-mi-rpc"; } igt_debug(" ctx_id=%u/%x reason=%s oa_timestamp32=%u\n", report[2], report[2], report_reason, report[1]); /* Should we skip this report? * * Only if the current context id of * the stream is not the one we want * to measure. */ if (current_ctx_id != ctx_id) { skip_reason = "not our context"; } if (n_invalid_ctx > 1) { skip_reason = "too many invalid context events"; } if (!skip_reason) { accumulate_reports(&accumulator, prev, report); igt_debug(" -> Accumulated deltas A0=%"PRIu64" A21=%"PRIu64", A26=%"PRIu64"\n", accumulator.deltas[2 + 0], /* skip timestamp + clock cycles */ accumulator.deltas[2 + 21], accumulator.deltas[2 + 26]); } else { igt_debug(" -> Skipping: %s\n", skip_reason); } /* Finally update current-ctx_id, only possible * with a valid context id. */ if (oa_report_ctx_is_valid(report)) { current_ctx_id = report[2]; n_invalid_ctx = 0; } else { n_invalid_ctx++; } prev = report; if (report == report1_32) { igt_debug("Breaking on end of report\n"); print_reports(report0_32, report1_32, lookup_format(test_oa_format)); break; } } igt_debug("n samples written = %"PRIu64"/%"PRIu64" (%ix%i)\n", accumulator.deltas[2 + 21],/* skip timestamp + clock cycles */ accumulator.deltas[2 + 26], width, height); accumulator_print(&accumulator, "filtered"); ret = drm_intel_bo_map(src[0].bo, false /* write enable */); igt_assert_eq(ret, 0); ret = drm_intel_bo_map(dst[0].bo, false /* write enable */); igt_assert_eq(ret, 0); ret = memcmp(src[0].bo->virtual, dst[0].bo->virtual, 4 * width * height); if (ret != 0) { accumulator_print(&accumulator, "total"); /* This needs to be investigated... From time * to time, the work we kick off doesn't seem * to happen. WTH?? */ exit(EAGAIN); } drm_intel_bo_unmap(src[0].bo); drm_intel_bo_unmap(dst[0].bo); igt_assert_eq(accumulator.deltas[2 + 26], width * height); for (int i = 0; i < ARRAY_SIZE(src); i++) { drm_intel_bo_unreference(src[i].bo); drm_intel_bo_unreference(dst[i].bo); } drm_intel_bo_unmap(bo); drm_intel_bo_unreference(bo); intel_batchbuffer_free(batch); drm_intel_gem_context_destroy(context0); drm_intel_gem_context_destroy(context1); drm_intel_bufmgr_destroy(bufmgr); __perf_close(stream_fd); } child_ret = igt_wait_helper(&child); igt_assert(WEXITSTATUS(child_ret) == EAGAIN || WEXITSTATUS(child_ret) == 0); } while (WEXITSTATUS(child_ret) == EAGAIN); } static unsigned long rc6_residency_ms(void) { return sysfs_read("power/rc6_residency_ms"); } static void test_rc6_disable(void) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, test_metric_set_id, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; unsigned long n_events_start, n_events_end; unsigned long rc6_enabled; rc6_enabled = 0; igt_sysfs_scanf(sysfs, "power/rc6_enable", "%lu", &rc6_enabled); igt_require(rc6_enabled); stream_fd = __perf_open(drm_fd, ¶m, false); n_events_start = rc6_residency_ms(); nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = 500000000 }, NULL); n_events_end = rc6_residency_ms(); igt_assert_eq(n_events_end - n_events_start, 0); __perf_close(stream_fd); gem_quiescent_gpu(drm_fd); n_events_start = rc6_residency_ms(); nanosleep(&(struct timespec){ .tv_sec = 1, .tv_nsec = 0 }, NULL); n_events_end = rc6_residency_ms(); igt_assert_neq(n_events_end - n_events_start, 0); } static int __i915_perf_add_config(int fd, struct drm_i915_perf_oa_config *config) { int ret = igt_ioctl(fd, DRM_IOCTL_I915_PERF_ADD_CONFIG, config); if (ret < 0) ret = -errno; return ret; } static int i915_perf_add_config(int fd, struct drm_i915_perf_oa_config *config) { int config_id = __i915_perf_add_config(fd, config); igt_debug("config_id=%i\n", config_id); igt_assert(config_id > 0); return config_id; } static void i915_perf_remove_config(int fd, uint64_t config_id) { igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id), 0); } static bool has_i915_perf_userspace_config(int fd) { uint64_t config = 0; int ret = igt_ioctl(fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config); igt_assert_eq(ret, -1); igt_debug("errno=%i\n", errno); return errno != EINVAL; } static void test_invalid_create_userspace_config(void) { struct drm_i915_perf_oa_config config; const char *uuid = "01234567-0123-0123-0123-0123456789ab"; const char *invalid_uuid = "blablabla-wrong"; uint32_t mux_regs[] = { 0x9888 /* NOA_WRITE */, 0x0 }; uint32_t invalid_mux_regs[] = { 0x12345678 /* invalid register */, 0x0 }; igt_require(has_i915_perf_userspace_config(drm_fd)); memset(&config, 0, sizeof(config)); /* invalid uuid */ strncpy(config.uuid, invalid_uuid, sizeof(config.uuid)); config.n_mux_regs = 1; config.mux_regs_ptr = to_user_pointer(mux_regs); config.n_boolean_regs = 0; config.n_flex_regs = 0; igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL); /* invalid mux_regs */ memcpy(config.uuid, uuid, sizeof(config.uuid)); config.n_mux_regs = 1; config.mux_regs_ptr = to_user_pointer(invalid_mux_regs); config.n_boolean_regs = 0; config.n_flex_regs = 0; igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL); /* empty config */ memcpy(config.uuid, uuid, sizeof(config.uuid)); config.n_mux_regs = 0; config.mux_regs_ptr = to_user_pointer(mux_regs); config.n_boolean_regs = 0; config.n_flex_regs = 0; igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL); /* empty config with null pointers */ memcpy(config.uuid, uuid, sizeof(config.uuid)); config.n_mux_regs = 1; config.mux_regs_ptr = to_user_pointer(NULL); config.n_boolean_regs = 2; config.boolean_regs_ptr = to_user_pointer(NULL); config.n_flex_regs = 3; config.flex_regs_ptr = to_user_pointer(NULL); igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL); /* invalid pointers */ memcpy(config.uuid, uuid, sizeof(config.uuid)); config.n_mux_regs = 42; config.mux_regs_ptr = to_user_pointer((void *) 0xDEADBEEF); config.n_boolean_regs = 0; config.n_flex_regs = 0; igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EFAULT); } static void test_invalid_remove_userspace_config(void) { struct drm_i915_perf_oa_config config; const char *uuid = "01234567-0123-0123-0123-0123456789ab"; uint32_t mux_regs[] = { 0x9888 /* NOA_WRITE */, 0x0 }; uint64_t config_id, wrong_config_id = 999999999; char path[512]; igt_require(has_i915_perf_userspace_config(drm_fd)); snprintf(path, sizeof(path), "metrics/%s/id", uuid); /* Destroy previous configuration if present */ if (try_sysfs_read_u64(path, &config_id)) i915_perf_remove_config(drm_fd, config_id); memset(&config, 0, sizeof(config)); memcpy(config.uuid, uuid, sizeof(config.uuid)); config.n_mux_regs = 1; config.mux_regs_ptr = to_user_pointer(mux_regs); config.n_boolean_regs = 0; config.n_flex_regs = 0; config_id = i915_perf_add_config(drm_fd, &config); /* Removing configs without permissions should fail. */ igt_fork(child, 1) { igt_drop_root(); do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id, EACCES); } igt_waitchildren(); /* Removing invalid config ID should fail. */ do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &wrong_config_id, ENOENT); i915_perf_remove_config(drm_fd, config_id); } static void test_create_destroy_userspace_config(void) { struct drm_i915_perf_oa_config config; const char *uuid = "01234567-0123-0123-0123-0123456789ab"; uint32_t mux_regs[] = { 0x9888 /* NOA_WRITE */, 0x0 }; uint32_t flex_regs[100]; int i; uint64_t config_id; uint64_t properties[] = { DRM_I915_PERF_PROP_OA_METRICS_SET, 0, /* Filled later */ /* OA unit configuration */ DRM_I915_PERF_PROP_SAMPLE_OA, true, DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format, DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec, DRM_I915_PERF_PROP_OA_METRICS_SET }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC | I915_PERF_FLAG_FD_NONBLOCK | I915_PERF_FLAG_DISABLED, .num_properties = ARRAY_SIZE(properties) / 2, .properties_ptr = to_user_pointer(properties), }; char path[512]; igt_require(has_i915_perf_userspace_config(drm_fd)); snprintf(path, sizeof(path), "metrics/%s/id", uuid); /* Destroy previous configuration if present */ if (try_sysfs_read_u64(path, &config_id)) i915_perf_remove_config(drm_fd, config_id); memset(&config, 0, sizeof(config)); memcpy(config.uuid, uuid, sizeof(config.uuid)); config.n_mux_regs = 1; config.mux_regs_ptr = to_user_pointer(mux_regs); /* Flex EU counters are only available on gen8+ */ if (intel_gen(devid) >= 8) { for (i = 0; i < ARRAY_SIZE(flex_regs) / 2; i++) { flex_regs[i * 2] = 0xe458; /* EU_PERF_CNTL0 */ flex_regs[i * 2 + 1] = 0x0; } config.flex_regs_ptr = to_user_pointer(flex_regs); config.n_flex_regs = ARRAY_SIZE(flex_regs) / 2; } config.n_boolean_regs = 0; /* Creating configs without permissions shouldn't work. */ igt_fork(child, 1) { igt_drop_root(); igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EACCES); } igt_waitchildren(); /* Create a new config */ config_id = i915_perf_add_config(drm_fd, &config); /* Verify that adding the another config with the same uuid fails. */ igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EADDRINUSE); /* Try to use the new config */ properties[1] = config_id; stream_fd = __perf_open(drm_fd, ¶m, false); /* Verify that destroying the config doesn't yield any error. */ i915_perf_remove_config(drm_fd, config_id); /* Read the config to verify shouldn't raise any issue. */ config_id = i915_perf_add_config(drm_fd, &config); __perf_close(stream_fd); i915_perf_remove_config(drm_fd, config_id); } /* Registers required by userspace. This list should be maintained by * the OA configs developers and agreed upon with kernel developers as * some of the registers have bits used by the kernel (for workarounds * for instance) and other bits that need to be set by the OA configs. */ static void test_whitelisted_registers_userspace_config(void) { struct drm_i915_perf_oa_config config; const char *uuid = "01234567-0123-0123-0123-0123456789ab"; uint32_t mux_regs[200]; uint32_t b_counters_regs[200]; uint32_t flex_regs[200]; uint32_t i; uint64_t config_id; char path[512]; int ret; const uint32_t flex[] = { 0xe458, 0xe558, 0xe658, 0xe758, 0xe45c, 0xe55c, 0xe65c }; igt_require(has_i915_perf_userspace_config(drm_fd)); snprintf(path, sizeof(path), "metrics/%s/id", uuid); if (try_sysfs_read_u64(path, &config_id)) i915_perf_remove_config(drm_fd, config_id); memset(&config, 0, sizeof(config)); memcpy(config.uuid, uuid, sizeof(config.uuid)); /* OASTARTTRIG[1-8] */ for (i = 0x2710; i <= 0x272c; i += 4) { b_counters_regs[config.n_boolean_regs * 2] = i; b_counters_regs[config.n_boolean_regs * 2 + 1] = 0; config.n_boolean_regs++; } /* OAREPORTTRIG[1-8] */ for (i = 0x2740; i <= 0x275c; i += 4) { b_counters_regs[config.n_boolean_regs * 2] = i; b_counters_regs[config.n_boolean_regs * 2 + 1] = 0; config.n_boolean_regs++; } config.boolean_regs_ptr = (uintptr_t) b_counters_regs; if (intel_gen(devid) >= 8) { /* Flex EU registers, only from Gen8+. */ for (i = 0; i < ARRAY_SIZE(flex); i++) { flex_regs[config.n_flex_regs * 2] = flex[i]; flex_regs[config.n_flex_regs * 2 + 1] = 0; config.n_flex_regs++; } config.flex_regs_ptr = (uintptr_t) flex_regs; } /* Mux registers (too many of them, just checking bounds) */ i = 0; /* NOA_WRITE */ mux_regs[i++] = 0x9800; mux_regs[i++] = 0; if (IS_HASWELL(devid)) { /* Haswell specific. undocumented... */ mux_regs[i++] = 0x9ec0; mux_regs[i++] = 0; mux_regs[i++] = 0x25100; mux_regs[i++] = 0; mux_regs[i++] = 0x2ff90; mux_regs[i++] = 0; } if (intel_gen(devid) >= 8 && !IS_CHERRYVIEW(devid)) { /* NOA_CONFIG */ mux_regs[i++] = 0xD04; mux_regs[i++] = 0; mux_regs[i++] = 0xD2C; mux_regs[i++] = 0; /* WAIT_FOR_RC6_EXIT */ mux_regs[i++] = 0x20CC; mux_regs[i++] = 0; } /* HALF_SLICE_CHICKEN2 (shared with kernel workaround) */ mux_regs[i++] = 0xE180; mux_regs[i++] = 0; if (IS_CHERRYVIEW(devid)) { /* Cherryview specific. undocumented... */ mux_regs[i++] = 0x182300; mux_regs[i++] = 0; mux_regs[i++] = 0x1823A4; mux_regs[i++] = 0; } /* PERFCNT[12] */ mux_regs[i++] = 0x91B8; mux_regs[i++] = 0; /* PERFMATRIX */ mux_regs[i++] = 0x91C8; mux_regs[i++] = 0; config.mux_regs_ptr = (uintptr_t) mux_regs; config.n_mux_regs = i / 2; /* Create a new config */ ret = igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_ADD_CONFIG, &config); igt_assert(ret > 0); /* Config 0 should be used by the kernel */ config_id = ret; i915_perf_remove_config(drm_fd, config_id); } static unsigned read_i915_module_ref(void) { FILE *fp = fopen("/proc/modules", "r"); char *line = NULL; size_t line_buf_size = 0; int len = 0; unsigned ref_count; igt_assert(fp); while ((len = getline(&line, &line_buf_size, fp)) > 0) { if (strncmp(line, "i915 ", 5) == 0) { unsigned long mem; int ret = sscanf(line + 5, "%lu %u", &mem, &ref_count); igt_assert(ret == 2); goto done; } } igt_assert(!"reached"); done: free(line); fclose(fp); return ref_count; } /* check that an open i915 perf stream holds a reference on the drm i915 module * including in the corner case where the original drm fd has been closed. */ static void test_i915_ref_count(void) { uint64_t properties[] = { /* Include OA reports in samples */ DRM_I915_PERF_PROP_SAMPLE_OA, true, /* OA unit configuration */ DRM_I915_PERF_PROP_OA_METRICS_SET, 0 /* updated below */, DRM_I915_PERF_PROP_OA_FORMAT, 0, /* update below */ DRM_I915_PERF_PROP_OA_EXPONENT, 0, /* update below */ }; struct drm_i915_perf_open_param param = { .flags = I915_PERF_FLAG_FD_CLOEXEC, .num_properties = sizeof(properties) / 16, .properties_ptr = to_user_pointer(properties), }; unsigned baseline, ref_count0, ref_count1; uint32_t oa_report0[64]; uint32_t oa_report1[64]; /* This should be the first test before the first fixture so no drm_fd * should have been opened so far... */ igt_assert_eq(drm_fd, -1); baseline = read_i915_module_ref(); igt_debug("baseline ref count (drm fd closed) = %u\n", baseline); drm_fd = __drm_open_driver(DRIVER_INTEL); devid = intel_get_drm_devid(drm_fd); sysfs = igt_sysfs_open(drm_fd); /* Note: these global variables are only initialized after calling * init_sys_info()... */ igt_require(init_sys_info()); properties[3] = test_metric_set_id; properties[5] = test_oa_format; properties[7] = oa_exp_1_millisec; ref_count0 = read_i915_module_ref(); igt_debug("initial ref count with drm_fd open = %u\n", ref_count0); igt_assert(ref_count0 > baseline); stream_fd = __perf_open(drm_fd, ¶m, false); ref_count1 = read_i915_module_ref(); igt_debug("ref count after opening i915 perf stream = %u\n", ref_count1); igt_assert(ref_count1 > ref_count0); close(drm_fd); close(sysfs); drm_fd = -1; sysfs = -1; ref_count0 = read_i915_module_ref(); igt_debug("ref count after closing drm fd = %u\n", ref_count0); igt_assert(ref_count0 > baseline); read_2_oa_reports(test_oa_format, oa_exp_1_millisec, oa_report0, oa_report1, false); /* not just timer reports */ __perf_close(stream_fd); ref_count0 = read_i915_module_ref(); igt_debug("ref count after closing i915 perf stream fd = %u\n", ref_count0); igt_assert_eq(ref_count0, baseline); } static void test_sysctl_defaults(void) { int paranoid = read_u64_file("/proc/sys/dev/i915/perf_stream_paranoid"); int max_freq = read_u64_file("/proc/sys/dev/i915/oa_max_sample_rate"); igt_assert_eq(paranoid, 1); igt_assert_eq(max_freq, 100000); } igt_main { igt_skip_on_simulation(); igt_fixture { struct stat sb; igt_require(stat("/proc/sys/dev/i915/perf_stream_paranoid", &sb) == 0); igt_require(stat("/proc/sys/dev/i915/oa_max_sample_rate", &sb) == 0); } igt_subtest("i915-ref-count") test_i915_ref_count(); igt_subtest("sysctl-defaults") test_sysctl_defaults(); igt_fixture { /* We expect that the ref count test before these fixtures * should have closed drm_fd... */ igt_assert_eq(drm_fd, -1); drm_fd = drm_open_driver(DRIVER_INTEL); igt_require_gem(drm_fd); devid = intel_get_drm_devid(drm_fd); sysfs = igt_sysfs_open(drm_fd); igt_require(init_sys_info()); write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); write_u64_file("/proc/sys/dev/i915/oa_max_sample_rate", 100000); gt_max_freq_mhz = sysfs_read("gt_boost_freq_mhz"); render_copy = igt_get_render_copyfunc(devid); igt_require_f(render_copy, "no render-copy function\n"); } igt_subtest("non-system-wide-paranoid") test_system_wide_paranoid(); igt_subtest("invalid-open-flags") test_invalid_open_flags(); igt_subtest("invalid-oa-metric-set-id") test_invalid_oa_metric_set_id(); igt_subtest("invalid-oa-format-id") test_invalid_oa_format_id(); igt_subtest("missing-sample-flags") test_missing_sample_flags(); igt_subtest("oa-formats") test_oa_formats(); igt_subtest("invalid-oa-exponent") test_invalid_oa_exponent(); igt_subtest("low-oa-exponent-permissions") test_low_oa_exponent_permissions(); igt_subtest("oa-exponents") test_oa_exponents(); igt_subtest("per-context-mode-unprivileged") { igt_require(IS_HASWELL(devid)); test_per_context_mode_unprivileged(); } igt_subtest("buffer-fill") test_buffer_fill(); igt_subtest("disabled-read-error") test_disabled_read_error(); igt_subtest("non-sampling-read-error") test_non_sampling_read_error(); igt_subtest("enable-disable") test_enable_disable(); igt_subtest("blocking") test_blocking(); igt_subtest("polling") test_polling(); igt_subtest("short-reads") test_short_reads(); igt_subtest("mi-rpc") test_mi_rpc(); igt_subtest("unprivileged-single-ctx-counters") { igt_require(IS_HASWELL(devid)); hsw_test_single_ctx_counters(); } igt_subtest("gen8-unprivileged-single-ctx-counters") { /* For Gen8+ the OA unit can no longer be made to clock gate * for a specific context. Additionally the partial-replacement * functionality to HW filter timer reports for a specific * context (SKL+) can't stop multiple applications viewing * system-wide data via MI_REPORT_PERF_COUNT commands. */ igt_require(intel_gen(devid) >= 8); gen8_test_single_ctx_render_target_writes_a_counter(); } igt_subtest("rc6-disable") test_rc6_disable(); igt_subtest("invalid-create-userspace-config") test_invalid_create_userspace_config(); igt_subtest("invalid-remove-userspace-config") test_invalid_remove_userspace_config(); igt_subtest("create-destroy-userspace-config") test_create_destroy_userspace_config(); igt_subtest("whitelisted-registers-userspace-config") test_whitelisted_registers_userspace_config(); igt_fixture { /* leave sysctl options in their default state... */ write_u64_file("/proc/sys/dev/i915/oa_max_sample_rate", 100000); write_u64_file("/proc/sys/dev/i915/perf_stream_paranoid", 1); close(drm_fd); } }