Messages in this thread | | | Subject | Re: [BUG] sched: fair group's bug | From | Peter Zijlstra <> | Date | Thu, 08 Jan 2009 15:16:35 +0100 |
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On Thu, 2009-01-08 at 09:30 +0800, Miao Xie wrote: > I tested fair group scheduler on my hyper-threading x86_64 box(2 CPU * 2 HT) > and found the deviation of the groups' CPU usage was larger than 2.6.26 > when *offline* a CPU or do hotplug frequently. It is less than 1% On 2.6.26,but > On current kernel, it is often greater than 4%, even than 10% by accident.
Its not a bug -- a scheduler without smp awareness cannot be compared to one without -- .26 just wasn't a complete group scheduler.
At best its a regression for your particular workload.
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