Messages in this thread | | | Subject | Re: [PATCH v1] sched: steer waking task to empty cfs_rq for better latencies | From | Peter Zijlstra <> | Date | Tue, 24 Apr 2012 19:12:27 +0200 |
| |
On Tue, 2012-04-24 at 22:37 +0530, Srivatsa Vaddagiri wrote: > * Peter Zijlstra <peterz@infradead.org> [2012-04-24 18:58:16]: > > > On Tue, 2012-04-24 at 22:26 +0530, Srivatsa Vaddagiri wrote: > > > Steer a waking task towards a cpu where its cgroup has zero tasks (in > > > order to provide it better sleeper credits and hence reduce its wakeup > > > latency). > > > > That's just vile.. pjt could you post your global vruntime stuff so > > vatsa can have a go at that? > > The workload I am up against does experience tons of wakeup (after very short > (microsecond range) bursts of sleeps) and so am skeptical how the global > vruntime would keep up with this kind of workload. I'd be happy to test patches > and give feedback!
Thing is, global vruntime might fix that flaw/property you're exploiting to get that preemption.
| |