Messages in this thread | | | Subject | Re: [patch] Reset the high water marks in CPUs pcp list | From | Rohit Seth <> | Date | Wed, 28 Sep 2005 18:12:56 -0700 |
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On Wed, 2005-09-28 at 14:56 -0700, Christoph Lameter wrote: > On Wed, 28 Sep 2005, Rohit Seth wrote: > > > On Wed, 2005-09-28 at 14:09 -0700, Christoph Lameter wrote: > > > On Wed, 28 Sep 2005, Rohit Seth wrote: > > > > > > > CONFIG_NUMA needs to be defined for that. And then too for flushing the > > > > remote pages. Also, when are you flushing the local pcps. Also note > > > > that this patch is just bringing the free pages on the pcp list closer > > > > to what used to be the number earlier. > > > > > > What was the reason for the increase of those numbers? > > Bugger batch size to possibly get more physical contiguous pages. That > > indirectly increased the high water marks for the pcps. > > I know that Jack and Nick did something with those counts to insure that > page coloring effects are avoided. Would you comment? >
About 10% performance variation was seen from run to run with original setting with certain workloads on x86 and IA-64 platforms. And this variation came down to about 2% with new settings.
-rohit
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