diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-04-08 13:56:50 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-04-09 07:29:47 +0100 |
| commit | e6f7db50a56d2742af5c1e83e3995e00a87d776b (patch) | |
| tree | 749a3110e02df93c32d3e1974a23a9a9fc2ff2c8 /tests/i915/i915_pm_rc6_residency.c | |
| parent | 66a7b20f4a1f95320c0d7c8c9704749001487783 (diff) | |
i915/i915_pm_rc6_residency: Show where the time is spent
Sometimes the bg_load only wakes up once or twice in 3s. That's
just unbelievable, so include some measurements to see how long the
load spends in submission & waiting.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Diffstat (limited to 'tests/i915/i915_pm_rc6_residency.c')
| -rw-r--r-- | tests/i915/i915_pm_rc6_residency.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/tests/i915/i915_pm_rc6_residency.c b/tests/i915/i915_pm_rc6_residency.c index cd1a6c8d..a38385e8 100644 --- a/tests/i915/i915_pm_rc6_residency.c +++ b/tests/i915/i915_pm_rc6_residency.c @@ -291,6 +291,7 @@ static void sighandler(int sig) static void bg_load(int i915, unsigned int flags, unsigned long *ctl) { + const bool has_execlists = intel_gen(intel_get_drm_devid(i915)) >= 8; struct drm_i915_gem_exec_object2 obj = { .handle = batch_create(i915), }; @@ -304,11 +305,13 @@ static void bg_load(int i915, unsigned int flags, unsigned long *ctl) sigaction(SIGINT, &act, NULL); do { + uint64_t submit, wait, elapsed; struct timespec tv = {}; igt_nsec_elapsed(&tv); gem_execbuf(i915, &execbuf); + submit = igt_nsec_elapsed(&tv); if (flags & WAITBOOST) { gem_sync(i915, obj.handle); if (flags & ONCE) @@ -317,7 +320,7 @@ static void bg_load(int i915, unsigned int flags, unsigned long *ctl) while (gem_bo_busy(i915, obj.handle)) usleep(0); } - ctl[1]++; + wait = igt_nsec_elapsed(&tv); /* * The legacy ringbuffer submission lacks a fast soft-rc6 @@ -327,11 +330,19 @@ static void bg_load(int i915, unsigned int flags, unsigned long *ctl) * * Fake it until we make it. */ - if (!gem_has_execlists(i915)) + if (!has_execlists) igt_drop_caches_set(i915, DROP_IDLE); + elapsed = igt_nsec_elapsed(&tv); + igt_info("Pulse took %.3fms (submit %.1fus, wait %.1fus, idle %.1fus)\n", + 1e-6 * elapsed, + 1e-3 * submit, + 1e-3 * (wait - submit), + 1e-3 * (elapsed - wait)); + ctl[1]++; + /* aim for ~1% busy */ - usleep(min(igt_nsec_elapsed(&tv) / 10, 50 * 1000)); + usleep(min(elapsed / 10, 50 * 1000)); } while (!READ_ONCE(*ctl)); } |