diff options
Diffstat (limited to 'tests/perf.c')
| -rw-r--r-- | tests/perf.c | 95 |
1 files changed, 89 insertions, 6 deletions
diff --git a/tests/perf.c b/tests/perf.c index eb8c0635..1f6251e1 100644 --- a/tests/perf.c +++ b/tests/perf.c @@ -2796,10 +2796,18 @@ test_enable_disable(void) 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); 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]; + double tick_per_period; /* Giving enough time for an overflow might help catch whether * the OA unit has been enabled even if the driver might at @@ -2819,18 +2827,90 @@ test_enable_disable(void) nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = fill_duration / 2 }, - NULL); + NULL); - while ((len = read(stream_fd, buf, buf_size)) == -1 && errno == EINTR) - ; + n_periodic_reports = 0; - igt_assert_neq(len, -1); + /* 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_assert(len > report_size * n_full_oa_reports * 0.45); - igt_assert(len < report_size * n_full_oa_reports * 0.55); + 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; + double previous_tick_per_period; + + 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]; + + previous_tick_per_period = tick_per_period; + + if (n_periodic_reports > 0 && + oa_report_is_periodic(oa_exponent, report)) { + tick_per_period = + oa_reports_tick_per_period(last_periodic_report, + report); + + if (!double_value_within(tick_per_period, + previous_tick_per_period, 5)) + igt_debug("clock change!\n"); + + igt_debug(" > report ts=%u" + " ts_delta_last_periodic=%8u is_timer=%i ctx_id=%8x gpu_ticks=%u nb_periodic=%u\n", + report[1], + report[1] - last_periodic_report[1], + oa_report_is_periodic(oa_exponent, report), + oa_report_get_ctx_id(report), + report[3] - last_periodic_report[3], + n_periodic_reports); + + 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 += + oa_report_is_periodic(oa_exponent, report); + 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 < %lu < %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... */ @@ -2843,6 +2923,9 @@ test_enable_disable(void) free(buf); __perf_close(stream_fd); + + load_helper_stop(); + load_helper_fini(); } static void |