On Tue, 07 Dec 2021, Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx> wrote: > live_engine_busy_stats waits for busyness to start ticking before > sampling busyness for the test sample duration. The wait accesses an > MMIO register and the uncore call to read it takes up to 3 ms in the > worst case. This can result in the wait timing out since the MMIO read > itself comsumes up the timeout of 500us. Increase the timeout to a > larger value of 10ms to account for the MMIO read time. > > Resolves: https://gitlab.freedesktop.org/drm/intel/-/issues/4536 $ git log --oneline --grep="^Resolves:" | wc -l 35 Please use Closes: instead. > Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx> > --- > drivers/gpu/drm/i915/gt/selftest_engine_pm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c > index 75f6efc9882f..8af261831470 100644 > --- a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c > +++ b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c > @@ -229,7 +229,7 @@ static int __spin_until_busier(struct intel_engine_cs *engine, ktime_t busyness) > start = ktime_get(); > while (intel_engine_get_busy_time(engine, &unused) == busyness) { > dt = ktime_get() - start; > - if (dt > 500000) { > + if (dt > 10000000) { > pr_err("active wait timed out %lld\n", dt); > ENGINE_TRACE(engine, "active wait time out %lld\n", dt); > return -ETIME; -- Jani Nikula, Intel Open Source Graphics Center
