From: Nick P. <nic...@ya...> - 2004-03-29 11:28:48
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Rick Lindsley wrote: > I've got a web page up now on my home machine which shows data from > schedstats across the various flavors of 2.6.4 and 2.6.5-rc2 under > load from kernbench, SPECjbb, and SPECdet. > > http://eaglet.rain.com/rick/linux/sched-domain/index.html > I can't see it > Two things that stand out are that sched-domains tends to call > load_balance() less frequently when it is idle and more frequently when > it is busy (as compared to the "standard" scheduler.) Another is that John Hawkes noticed problems here too. mm5 has a patch to improve this for NUMA node balancing. No change on non-NUMA though if that is what you were testing - we might need to tune this a bit if it is hurting. > even though it moves fewer tasks on average, the sched-domains code shows > about half of pull_task()'s work is coming from active_load_balance() ... Yeah this is wrong and shouldn't be happening. It would have been due to a bug in the imbalance calculation which is now fixed. |