Messages in this thread | | | Date | Mon, 31 Mar 2008 11:25:32 -0400 | From | "Bryan Donlan" <> | Subject | Re: Limiting CPU usage for processes in linux 2.6.18.8 |
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On Sun, Mar 30, 2008 at 9:37 PM, Eric Descourtis <desc0068@algonquincollege.com> wrote: > Hello, > > I would like to implement a patch to the scheduler that limits the CPU usage of individual > processes to a percentage in Linux 2.6.18.8 (Can't be any other version). > I would just like some feedback on the following questions: > > 1. How can I ensure that limited processes get their CPU time percentage allocation? > 2. Are there mechanisms in place that would simplify this process? > > I have been hitting my head against the wall for a long time now, any help would be appreciated.
The scheduler isn't really designed to force programs to idle when there's nothing else to run - that would be a waste :)
If the reason you're on 2.6.18.8 is for Xen, you might want to try using a recent kernel with paravirt ops, and use the CFS fair group (or user) scheduler to set cpu shares. See Documentation/sched-design-CFS.txt . If you really want to eat up a certain portion of CPU time doing nothing, you could create a program to busy-loop to starve the others and set CPU shares appropriately, though I don't really see the point in that.
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