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@xxxxxxxxxxxxxxxxxx>
---
tests/i915/i915_pm_rc6_residency.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/tests/i915/i915_pm_rc6_residency.c b/tests/i915/i915_pm_rc6_residency.c
index cd1a6c8d6..15efba186 100644
--- a/tests/i915/i915_pm_rc6_residency.c
+++ b/tests/i915/i915_pm_rc6_residency.c
@@ -304,11 +304,13 @@ 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)
@@ -317,6 +319,7 @@ static void bg_load(int i915, unsigned int flags, unsigned long *ctl)
while (gem_bo_busy(i915, obj.handle))
usleep(0);
}
+ wait = igt_nsec_elapsed(&tv);
ctl[1]++;
/*
@@ -330,8 +333,15 @@ static void bg_load(int i915, unsigned int flags, unsigned long *ctl)
if (!gem_has_execlists(i915))
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));
+
/* aim for ~1% busy */
- usleep(min(igt_nsec_elapsed(&tv) / 10, 50 * 1000));
+ usleep(min(elapsed / 10, 50 * 1000));
} while (!READ_ONCE(*ctl));
}
--
2.26.0
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