Messages in this thread | | | Subject | Re: [RFC][PATCH] sched: avoid huge bonus to sleepers on busy machines | From | Mike Galbraith <> | Date | Mon, 04 Jan 2010 13:49:18 +0100 |
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On Mon, 2010-01-04 at 13:36 +0100, Peter Zijlstra wrote: > On Mon, 2010-01-04 at 13:30 +0100, Mike Galbraith wrote: > > Any diddling of sleeper fairness would have to be accompanied with a > > preemption model change methinks. > > Just told jays the exact same thing on IRC ;-) > > Also, workloads are interesting, the signal test thing is the easiest to > test the preemption side, various things like QPID show the down-side > iirc.
Best testcase for the downside in my arsenal is vmark. It performs a _lot_ better with no wakeup preemption. 'Course if you run your box that way, you quickly find out what a horrible idea that is :)
-Mike
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