Re: [Intel-gfx] [PATCH igt 01/10] igt/perf_pmu: Tighten semaphore-wait measurement

2017-12-04 Thread Tvrtko Ursulin
On 04/12/2017 09:27, Chris Wilson wrote: Record the before/after semaphore-wait values around the sleep to try to reduce the inaccuracy from scheduler delays. Previously, the samples were taken before submitting the batch and then after synchronising its completion. The measurement will then be

[Intel-gfx] [PATCH igt 01/10] igt/perf_pmu: Tighten semaphore-wait measurement

2017-12-04 Thread Chris Wilson
Record the before/after semaphore-wait values around the sleep to try to reduce the inaccuracy from scheduler delays. Previously, the samples were taken before submitting the batch and then after synchronising its completion. The measurement will then be the total that the semaphore was being