[Intel-gfx] [PATCH i-g-t 02/11] tests/perf: add per context filtering test for gen8+
Matthew Auld
matthew.william.auld at gmail.com
Tue Aug 8 14:21:27 UTC 2017
On 4 August 2017 at 12:20, Lionel Landwerlin
<lionel.g.landwerlin at intel.com> wrote:
> From: Robert Bragg <robert at sixbynine.org>
>
> Signed-off-by: Robert Bragg <robert at sixbynine.org>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
> tests/perf.c | 806 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 768 insertions(+), 38 deletions(-)
>
> diff --git a/tests/perf.c b/tests/perf.c
> index 26581ce4..279ff0c6 100644
> --- a/tests/perf.c
> +++ b/tests/perf.c
> @@ -48,7 +48,9 @@ IGT_TEST_DESCRIPTION("Test the i915 perf metrics streaming interface");
> #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))
> @@ -565,6 +567,22 @@ oa_exponent_to_ns(int exponent)
> return 1000000000ULL * (2ULL << exponent) / timestamp_frequency;
> }
>
> +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 (IS_GEN9(devid)) {
> + return report[0] & (1ul << 16);
> + }
> +
> + /* Need to update this function for newer Gen. */
> + igt_assert(!"reached");
> +}
> +
> +
> static void
> hsw_sanity_check_render_basic_reports(uint32_t *oa_report0, uint32_t *oa_report1,
> enum drm_i915_oa_format fmt)
> @@ -669,6 +687,100 @@ gen8_40bit_a_delta(uint64_t value0, uint64_t value1)
> 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)
> +{
> + enum drm_i915_oa_format 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 < oa_formats[format].n_a40; i++)
> + accumulate_uint40(i, start, end, format, deltas + idx++);
> +
> + for (int i = 0; i < oa_formats[format].n_a; i++) {
> + accumulate_uint32(oa_formats[format].a_off + 4 * i,
> + start, end, deltas + idx++);
> + }
> +
> + for (int i = 0; i < oa_formats[format].n_b; i++) {
> + accumulate_uint32(oa_formats[format].b_off + 4 * i,
> + start, end, deltas + idx++);
> + }
> +
> + for (int i = 0; i < oa_formats[format].n_c; i++) {
> + accumulate_uint32(oa_formats[format].c_off + 4 * i,
> + start, end, deltas + idx++);
> + }
> +}
> +
> +static void
> +accumulator_print(struct accumulator *accumulator, const char *title)
> +{
> + enum drm_i915_oa_format 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 = %lu\n", deltas[idx++]);
> + igt_debug("\tclock cycle delta = %lu\n", deltas[idx++]);
> +
> + for (int i = 0; i < oa_formats[format].n_a40; i++)
> + igt_debug("\tA%u = %lu\n", i, deltas[idx++]);
> + } else {
> + igt_debug("\ttime delta = %lu\n", deltas[idx++]);
> + }
> +
> + for (int i = 0; i < oa_formats[format].n_a; i++) {
> + int a_id = oa_formats[format].first_a + i;
> + igt_debug("\tA%u = %lu\n", a_id, deltas[idx++]);
> + }
> +
> + for (int i = 0; i < oa_formats[format].n_a; i++)
> + igt_debug("\tB%u = %lu\n", i, deltas[idx++]);
> +
> + for (int i = 0; i < oa_formats[format].n_c; i++)
> + igt_debug("\tC%u = %lu\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,
> @@ -917,6 +1029,62 @@ gt_frequency_range_restore(void)
> gt_max_freq_mhz = gt_max_freq_mhz_saved;
> }
>
> +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 = oa_formats[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
> @@ -1336,6 +1504,66 @@ print_reports(uint32_t *oa_report0, uint32_t *oa_report1, int fmt)
> }
>
> static void
> +print_report(uint32_t *report, int fmt)
> +{
I get an unused warning for this...
> + igt_debug("TIMESTAMP: %"PRIu32"\n", report[1]);
> +
> + if (IS_HASWELL(devid) && oa_formats[fmt].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 < oa_formats[fmt].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 < oa_formats[fmt].n_a; j++) {
> + uint32_t *a = (uint32_t *)(((uint8_t *)report) +
> + oa_formats[fmt].a_off);
> + int a_id = oa_formats[fmt].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 < oa_formats[fmt].n_b; j++) {
> + uint32_t *b = (uint32_t *)(((uint8_t *)report) +
> + oa_formats[fmt].b_off);
> +
> + igt_debug("B%d: %"PRIu32"\n", j, b[j]);
> + }
> +
> + for (int j = 0; j < oa_formats[fmt].n_c; j++) {
> + uint32_t *c = (uint32_t *)(((uint8_t *)report) +
> + oa_formats[fmt].c_off);
> +
> + igt_debug("C%d: %"PRIu32"\n", j, c[j]);
> + }
> +}
> +static void
> test_oa_formats(void)
> {
> for (int i = 0; i < ARRAY_SIZE(oa_formats); i++) {
> @@ -1415,6 +1643,11 @@ test_oa_exponents(int gt_freq_mhz)
> uint32_t freq;
> int n_tested = 0;
> int n_freq_matches = 0;
> + int n_time_delta_matches = 0;
> +
> +#warning "XXX: it seems pretty odd that the time delta assertion failures centre around these exponents"
> + if (i == 6 || i == 7 || i == 8)
> + continue;
Why do we need this? Also does this belong in this patch?
>
> /* The exponent is effectively selecting a bit in the timestamp
> * to trigger reports on and so in practice we expect the raw
> @@ -1454,15 +1687,19 @@ test_oa_exponents(int gt_freq_mhz)
> timestamp_delta = oa_report1[1] - oa_report0[1];
> igt_assert_neq(timestamp_delta, 0);
>
> - if (timestamp_delta != expected_timestamp_delta) {
> - igt_debug("timestamp0 = %u/0x%x\n",
> - oa_report0[1], oa_report0[1]);
> - igt_debug("timestamp1 = %u/0x%x\n",
> + if (timestamp_delta == expected_timestamp_delta)
> + n_time_delta_matches++;
> + else {
> + igt_debug("timestamp delta mismatch: %"PRIu64"ns != expected %"PRIu64"ns, ts0 = %u/0x%x, ts1 = %u/0x%x\n",
> + timebase_scale(timestamp_delta),
> + timebase_scale(expected_timestamp_delta),
> + oa_report0[1], oa_report0[1],
> oa_report1[1], oa_report1[1]);
> + print_reports(oa_report0, oa_report1, test_oa_format);
> + igt_assert(timestamp_delta <
> + (expected_timestamp_delta * 2));
> }
>
> - igt_assert_eq(timestamp_delta, expected_timestamp_delta);
> -
> ticks0 = read_report_ticks(oa_report0, test_oa_format);
> ticks1 = read_report_ticks(oa_report1, test_oa_format);
> clock_delta = ticks1 - ticks0;
> @@ -1484,6 +1721,16 @@ test_oa_exponents(int gt_freq_mhz)
> igt_debug("sysfs frequency pinning too unstable for cross-referencing with OA derived frequency");
> igt_assert_eq(n_tested, 10);
>
> + igt_debug("number of iterations with expected timestamp delta = %d\n",
> + n_time_delta_matches);
> +
> + /* The HW doesn't give us any strict guarantee that the
> + * timestamps are exactly aligned with the exponent mask but
> + * in practice it seems very rare for that not to be the case
> + * so it a useful sanity check to assert quite strictly...
> + */
> + igt_assert(n_time_delta_matches >= 9);
> +
> igt_debug("number of iterations with expected clock frequency = %d\n",
> n_freq_matches);
>
> @@ -2459,14 +2706,8 @@ test_mi_rpc(void)
> }
>
> static void
> -scratch_buf_init(drm_intel_bufmgr *bufmgr,
> - struct igt_buf *buf,
> - int width, int height,
> - uint32_t color)
> +scratch_buf_memset(drm_intel_bo *bo, 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);
> int ret;
>
> ret = drm_intel_bo_map(bo, true /* writable */);
> @@ -2476,6 +2717,19 @@ scratch_buf_init(drm_intel_bufmgr *bufmgr,
> ((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);
>
> buf->bo = bo;
> buf->stride = stride;
> @@ -2494,14 +2748,25 @@ emit_stall_timestamp_and_rpc(struct intel_batchbuffer *batch,
> PIPE_CONTROL_RENDER_TARGET_FLUSH |
> PIPE_CONTROL_WRITE_TIMESTAMP);
>
> - 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();
> + 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);
> }
> @@ -2547,7 +2812,7 @@ hsw_test_single_ctx_counters(void)
> drm_intel_bufmgr *bufmgr;
> drm_intel_context *context0, *context1;
> struct intel_batchbuffer *batch;
> - struct igt_buf src, dst;
> + struct igt_buf src[3], dst[3];
> drm_intel_bo *bo;
> uint32_t *report0_32, *report1_32;
> uint64_t timestamp0_64, timestamp1_64;
> @@ -2565,8 +2830,10 @@ hsw_test_single_ctx_counters(void)
> bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
> drm_intel_bufmgr_gem_enable_reuse(bufmgr);
>
> - scratch_buf_init(bufmgr, &src, width, height, 0xff0000ff);
> - scratch_buf_init(bufmgr, &dst, width, height, 0x00ff00ff);
> + 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);
>
> @@ -2600,14 +2867,19 @@ hsw_test_single_ctx_counters(void)
> */
> render_copy(batch,
> context0,
> - &src, 0, 0, width, height,
> - &dst, 0, 0);
> + &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);
>
> @@ -2634,8 +2906,8 @@ hsw_test_single_ctx_counters(void)
>
> render_copy(batch,
> context0,
> - &src, 0, 0, width, height,
> - &dst, 0, 0);
> + &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);
> @@ -2646,13 +2918,13 @@ hsw_test_single_ctx_counters(void)
> */
> render_copy(batch,
> context1,
> - &src, 0, 0, width, height,
> - &dst, 0, 0);
> + &src[1], 0, 0, width, height,
> + &dst[1], 0, 0);
>
> render_copy(batch,
> context1,
> - &src, 0, 0, width, height,
> - &dst, 0, 0);
> + &src[2], 0, 0, width, height,
> + &dst[2], 0, 0);
>
> /* And another */
> intel_batchbuffer_flush_with_context(batch, context1);
> @@ -2681,6 +2953,7 @@ hsw_test_single_ctx_counters(void)
>
> /* 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);
>
> @@ -2715,8 +2988,10 @@ hsw_test_single_ctx_counters(void)
> (delta_oa32_ns - delta_ts64_ns);
> igt_assert(delta_delta <= 320);
>
> - drm_intel_bo_unreference(src.bo);
> - drm_intel_bo_unreference(dst.bo);
> + 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);
> @@ -2730,6 +3005,454 @@ hsw_test_single_ctx_counters(void)
> 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
Smells like gen7...
> + * 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 = oa_formats[test_oa_format].size;
> + size_t sample_size = (sizeof(struct drm_i915_perf_record_header) +
> + format_size);
> + int max_reports = (16 * 1024 * 1024) / 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) {
For this test why do we need concern ourselves with spawning a child
process, it's not like we need to drop root?
> + 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
> + };
> +
> + //igt_drop_root();
Commented out code, elsewhere also...
> +
> + 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);
> +
> + 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 */
> + //report0_32[2] = 0xffffffff;
> + 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 */
> + //report1_32[2] = 0xffffffff;
> + ctx1_id = report1_32[2];
> +
> + memset(accumulator.deltas, 0, sizeof(accumulator.deltas));
> + accumulate_reports(&accumulator, report0_32, report1_32);
> + igt_debug("total: A0 = %lu, A21 = %lu, A26 = %lu\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 320 nanoseconds margin.
Looks like 500ns.
> + */
> + 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=%lu A21=%lu, A26=%lu\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=%lu A21=%lu, A26=%lu\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 contextOB id. */
What's a contextOB?
> + 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 = %ld/%lu (%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);
> + }
> + //igt_assert_eq(ret, 0);
> +
> + 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 void
> test_rc6_disable(void)
> {
> @@ -3264,8 +3987,10 @@ igt_main
> test_oa_exponents(550);
> }
>
> - igt_subtest("per-context-mode-unprivileged")
> + igt_subtest("per-context-mode-unprivileged") {
> + igt_require(IS_HASWELL(devid));
> test_per_context_mode_unprivileged();
> + }
>
> igt_subtest("buffer-fill")
> test_buffer_fill();
> @@ -3290,15 +4015,20 @@ igt_main
> igt_subtest("mi-rpc")
> test_mi_rpc();
>
> - igt_subtest("unprivileged-singled-ctx-counters") {
> + igt_subtest("unprivileged-single-ctx-counters") {
> + igt_require(IS_HASWELL(devid));
> + hsw_test_single_ctx_counters();
> + }
> +
> + igt_subtest("gen8-unprivileged-single-ctx-counters") {
Did you mean -privileged-single-ctx-counters, we require root to
configure the OA unit for gen8+, no?
> /* 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(IS_HASWELL(devid));
> - hsw_test_single_ctx_counters();
> + igt_require(intel_gen(devid) >= 8);
> + gen8_test_single_ctx_render_target_writes_a_counter();
> }
>
> igt_subtest("rc6-disable")
> --
> 2.13.3
>
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