Messages in this thread | | | Date | Fri, 18 May 2018 14:19:13 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v3] sched/fair: update scale invariance of PELT |
| |
On Fri, May 18, 2018 at 02:08:51PM +0200, Peter Zijlstra wrote: > However, I think we can shrink util_avg unconditionally, which would > give us exactly the 4 byte hole we need.
There is of course the problem that we track rq util_avg as a straight sum of entity util_avg, such that if you migrate/wake a bunch of tasks into the rq the sum can exceed the natural bounds, although it will settle down back to it.
If we're really worried we could try and detect overflows on the summing and clip.
| |