Quoting Tvrtko Ursulin (2018-04-10 11:22:55) > > On 10/04/2018 10:57, Chris Wilson wrote: > > But I'm not understanding the failure -- why is the estimate bad? At the > > very least we still ensure that it is monotonic? Is it just the jitter > > you are worrying about? (If the estimate is bad here, isn't it always > > bad?) > > As far as I have seen failures from CI are all estimate being too large. > (no jitter and no going backwards) > > What I suspect is going bad in either case, is that we must not add the > delta from current jiffies to internal runtime pm counters if state is > not suspended. If we do that we are accounting an unknown period of time > as suspended time and that would explain the over-estimation. > > In other words we are only allowed to estimate if the current state is > definitely suspended. If it is anything else we need to report either > the last estimated value, or the last real value, depending what is more > recent.
i.e. we must not use kdev->power.suspended_jiffies before we know it is set. Ok, that is stating to make sense. Thanks, can you update the commitmsg with this (pretty much verbatim as it is a good explanation). -Chris _______________________________________________ Intel-gfx mailing list Intelfirstname.lastname@example.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx