Messages in this thread |  | | | Date | Mon, 09 Feb 2004 08:43:18 -0800 | | From | "Martin J. Bligh" <> | | Subject | Re: [PATCH] Load balancing problem in 2.6.2-mm1 |
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>> Can we keep current behaviour default, and if arches want to >> override it they can? And if someone one day does testing to >> show it really isn't a good idea, then we can change the default. >> >> I like to try stick to the fairness first approach. >> >> We got quite a few complaints about unfairness when the >> scheduler used to keep 2 on one cpu and 1 on another, even in >> development kernels. I suspect that most wouldn't have known >> one way or the other if only top showed 66% each, but still. > > Stupid question: Does the balancing consider process priority? Is it > unfair to have two lower pri tasks always on one cpu while the highest > pri of the three is always by itself?
No, it doesn't take account of that. We've discussed that before at some point, and yes, I think it's wrong, but on the other hand, we want to be reasonably fast at deciding what to take, and there are a whole bunch of other criteria that we ought to be taking account as well - it's difficult.
M.
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