Re: [Intel-gfx] [PATCH i-g-t v4] tests/perf_pmu: Avoid RT thread for accuracy test

2018-04-16 Thread Chris Wilson
Quoting Tvrtko Ursulin (2018-04-16 10:55:29) > > On 14/04/2018 12:35, Chris Wilson wrote: > > Quoting Tvrtko Ursulin (2018-04-11 14:52:36) > >> > >> On 11/04/2018 14:23, Chris Wilson wrote: > >>> Quoting Tvrtko Ursulin (2018-04-04 10:51:52) > From: Tvrtko Ursulin > > Realtime sched

Re: [Intel-gfx] [PATCH i-g-t v4] tests/perf_pmu: Avoid RT thread for accuracy test

2018-04-16 Thread Tvrtko Ursulin
On 14/04/2018 12:35, Chris Wilson wrote: Quoting Tvrtko Ursulin (2018-04-11 14:52:36) On 11/04/2018 14:23, Chris Wilson wrote: Quoting Tvrtko Ursulin (2018-04-04 10:51:52) From: Tvrtko Ursulin Realtime scheduling interferes with execlists submission (tasklet) so try to simplify the PWM loo

Re: [Intel-gfx] [PATCH i-g-t v4] tests/perf_pmu: Avoid RT thread for accuracy test

2018-04-14 Thread Chris Wilson
Quoting Tvrtko Ursulin (2018-04-11 14:52:36) > > On 11/04/2018 14:23, Chris Wilson wrote: > > Quoting Tvrtko Ursulin (2018-04-04 10:51:52) > >> From: Tvrtko Ursulin > >> > >> Realtime scheduling interferes with execlists submission (tasklet) so try > >> to simplify the PWM loop in a few ways: > >

Re: [Intel-gfx] [PATCH i-g-t v4] tests/perf_pmu: Avoid RT thread for accuracy test

2018-04-11 Thread Tvrtko Ursulin
On 11/04/2018 14:23, Chris Wilson wrote: Quoting Tvrtko Ursulin (2018-04-04 10:51:52) From: Tvrtko Ursulin Realtime scheduling interferes with execlists submission (tasklet) so try to simplify the PWM loop in a few ways: * Drop RT. * Longer batches for smaller systematic error. * More

Re: [Intel-gfx] [PATCH i-g-t v4] tests/perf_pmu: Avoid RT thread for accuracy test

2018-04-11 Thread Chris Wilson
Quoting Tvrtko Ursulin (2018-04-04 10:51:52) > From: Tvrtko Ursulin > > Realtime scheduling interferes with execlists submission (tasklet) so try > to simplify the PWM loop in a few ways: > > * Drop RT. > * Longer batches for smaller systematic error. > * More truthful test duration calculati

[Intel-gfx] [PATCH i-g-t v4] tests/perf_pmu: Avoid RT thread for accuracy test

2018-04-04 Thread Tvrtko Ursulin
From: Tvrtko Ursulin Realtime scheduling interferes with execlists submission (tasklet) so try to simplify the PWM loop in a few ways: * Drop RT. * Longer batches for smaller systematic error. * More truthful test duration calculation. * Less clock queries. * No self-adjust - instead just r