Messages in this thread | | | Date | Mon, 14 Jul 2003 18:06:19 +0200 | From | Mike Galbraith <> | Subject | Re: [patch] SCHED_SOFTRR starve-free linux scheduling policy ... |
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At 08:09 AM 7/14/2003 -0700, Davide Libenzi wrote: >On Mon, 14 Jul 2003, Mike Galbraith wrote: > > > At 12:12 AM 7/14/2003 -0700, Davide Libenzi wrote: > > >On Mon, 14 Jul 2003, Mike Galbraith wrote: > > > > While testing, I spotted something pretty strange. It's not > specific to > > > > SCHED_SOFTRR, SCHED_RR causes it too. If I fire up xmms's gl > visualization > > > > with either policy, X stops getting enough sleep credit to stay at > a usable > > > > priority even when cpu usage is low. Fully repeatable weirdness. See > > > > attached top snapshots. > > > > > >RT tasks are pretty powerfull and should not be used to run everything ;) > > >What I was seeking with this patch was 1) deterministic latency 2) stave > > >protection. > > > > Yes, I know. I only fired up the cpu hog as a test to see that the > > protection would kick in. I did do that too though, ran _everything_... > > the whole X/KDE beast SCHED_SOFTRR for grins :) > > > > I should have reported the strangeness in a different thread, it has > > nothing to do with your patch. > >Did you try the skip resistance test by running XMMS alone with audio ?
Yes, and it worked fine. No cpu load I tossed at it caused a skip.
-Mike
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