Messages in this thread | | | Subject | Re: [RFC][PATCH 4/4] sched/fair: Optimize cgroup pick_next_task_fair | From | Peter Zijlstra <> | Date | Fri, 15 Jun 2012 16:03:19 +0200 |
| |
On Thu, 2012-06-14 at 23:19 +0200, Peter Zijlstra wrote: > On Thu, 2012-06-14 at 15:29 +0200, Peter Zijlstra wrote: > > Since commit 2f36825b1 ("sched: Next buddy hint on sleep and preempt > > path") it is likely we pick a new task from the same cgroup, doing a put > > and then set on all intermediate entities is a waste of time, so try to > > avoid this. > > I just noticed put_prev_entity() also does the bandwidth enforcement > stuff, I think I just broke that. Will have a peek at fixing that > tomorrow or so.
Damn, that's annoying, that wants to be done bottom-up, while we're now doing a top-down selection. pjt any sane ideas?
| |