Re: [PATCH v3 05/22] sched: remove domain iterations in fork/exec/wake

[Alex Shi]

On 01/14/2013 05:03 PM, li guang wrote:
>>> > > This corner case may occur after "[PATCH v3 03/22] sched: fix
>>> > > find_idlest_group mess logical" brought in the local sched_group bias,
>>> > > and assume balancing runs on cpux2.
>>> > > ideally,  find_idlest_group should find the real idlest(this case: sgy),
>>> > > then, this patch is reasonable.
>>> > > 
>> > 
>> > Sure. but seems it is a bit hard to go down the idlest group.
>> > 
>> > and the old logical is real cost too much, on my 2 socket NHM/SNB
>> > server, hackbench can increase 2~5% performance. and no clean
>> > performance on kbuild/aim7 etc.
> what about remove local group bias?


Any theory profit for non local group? Usually, bias toward local group
will has cache locality profit.

-- 
Thanks Alex
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