On Sun, 8 May 2005 03:59, Carlos Carvalho wrote: > Con Kolivas ([email protected]) wrote on 7 May 2005 23:42: > >SMP balancing is currently designed purely with throughput in mind. This > >working patch implements a mechanism for supporting 'nice' across > > physical cpus without impacting throughput. > > > >This is a version for stable kernel 2.6.11.* > > > >Carlos, if you could test this with your test case it would be > > appreciated. > > Unfortunately it doesn't seem to have any effect: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 184 user1 39 19 7220 5924 520 R 99.9 1.1 209:40.68 mi41 > 266 user2 25 0 1760 480 420 R 50.5 0.1 86:36.31 xdipole1 > 227 user3 25 0 155m 62m 640 R 49.5 12.3 95:07.89 b170-se.x > > Note that the nice 19 job monopolizes one processor while the other > two nice 0 ones share a single processor. > > This is really a showstopper for this kind of application :-( Ok back to the drawing board. I have to try and figure out why it doesn't work for your case. I tried it on 4x with lots of cpu bound tasks so I'm not sure why it doesn't help with tyours. Cheers, Con
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- [PATCH] implement nice support across physical cpus on SMP
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