Messages in this thread | | | Date | Thu, 10 Apr 2014 11:26:35 +0100 | From | Jeremy Harris <> | Subject | Re: [PATCH 0/2] Disable zone_reclaim_mode by default |
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On 08/04/14 23:58, Christoph Lameter wrote: > The reason that zone reclaim is on by default is that off node accesses > are a big performance hit on large scale NUMA systems (like ScaleMP and > SGI). Zone reclaim was written *because* those system experienced severe > performance degradation. > > On the tightly coupled 4 and 8 node systems there does not seem to > be a benefit from what I hear.
In principle, is this difference in distance something the kernel could measure? -- Cheers, Jeremy
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