Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [PATCH] Performance regression in 2.6.7-rc3 | Date | Tue, 15 Jun 2004 23:11:56 +1000 |
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On Tue, 15 Jun 2004 14:56, Ingo Molnar wrote: > * Con Kolivas <kernel@kolivas.org> wrote: > > with a little bit of detective work and help from Wli we tracked down > > that this patch caused it: > > [PATCH] sched: improve wakeup-affinity > > > > A massive increase in idle time was observed and the throughput > > dropped by 40% Reversing this patch gave these results: > > > > backsched1: http://khack.osdl.org/stp/293865/ > > Composite Query Processing Power Throughput Numerical Quantity > > 193.93 145.95 257.67 > > > > It may be best to reverse this patch until the regression is better > > understood. > > agreed. It is weird because Nick said that pgsql was tested with the > patch - and we applied the patch based on those good results. Nick? > > Anyway, does the patch below fix the pgsql problem? It reverts to the > more agressive idle-balancing variant (which isnt strictly necessary for > the bw_pipe problem).
Better than the patch backed out but still worse than it was before: http://khack.osdl.org/stp/293958/ Composite Query Processing Power Throughput Numerical Quantity 161.42 152.90 170.41
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