Re: SMP Affinity and nice

From: Chris Friesen
Date: Wed Aug 23 2006 - 16:52:42 EST

Rich Paredes wrote:

So since cpumax5 has a lower nice value and thus a higher priority (25 in
this case), shouldn't it be given it's own cpu. If I give cpumax5 a nice
value of -20, it does start using it's own cpu.

My explanation would be that since the scheduler tries to limit cpu
affinity, the nice value of 0 isn't enough to get the scheduler to move
this process to another processors run queue. I could be totally wrong
here though.

I think you are correct. The load balancer doesn't think that this is enough of an imbalance to go through the effort of swapping two processes around.

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