Messages in this thread | | | Date | Wed, 4 Aug 2004 14:45:38 +0200 | From | Ingo Molnar <> | Subject | Re: 2.6.8-rc2-mm2 |
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* Con Kolivas <kernel@kolivas.org> wrote:
> Ingo Molnar writes: > > Thanks for replying. > > >* Nick Piggin <nickpiggin@yahoo.com.au> wrote: > > > >>Also, basic interactivity in X is bad with the interactive sysctl set > >>to 0 (is X supposed to be at nice 0?), however fairness is bad when > >>interactive is 1. I'm not sure if this is an acceptable tradeoff - are > >>you planning to fix it? > > > >it also has clear interactivity problems when just running lots of CPU > >hogs even with the default interactive=1 compute=0 setting. > > Can you define them please? I haven't had any reported to me.
sure: take a process that uses 85% of CPU time (and sleeps 15% of the time) if running on an idle system. Start just two of these hogs at normal priority. 2.6.8-rc2-mm2 becomes almost instantly unusable even over a text console: a single 'top' refresh takes ages, 'ls' displays one line per second or so. Start more of these and the system effectively locks up.
unapply staircase-cpu-scheduler-268-rc2-mm1.patch and the same workload becomes usable.
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