Messages in this thread | | | Date | Wed, 27 Feb 2008 13:45:18 +0900 | From | KOSAKI Motohiro <> | Subject | Re: [RFC][PATCH] page reclaim throttle take2 |
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Hi
> One more thing, I would request you to add default heuristics (number of > reclaimers), based on the number of cpus in the system. Letting people tuning it > is fine, but defaults should be related to number of cpus, nodes and zones on > the system. Zones can be reaped in parallel per node and cpus allow threads to > run in parallel. So please use that to come up with good defaults, instead of a > number like "3".
I don't think so. all modern many cpu machine stand on NUMA. it mean following, - if cpu increases, then zone increases, too.
if default value increase by #cpus, lock contension dramatically increase on large numa.
Have I overlooked anything?
and, (but) i afraid to 3 is too small value. if you have another test result on large machine, please show me.
- kosaki
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