Kernel scheduler testing

-=GGW=- $ol!d $n4>|e · Veteran Joined: 12 Apr 2004 Posts: 1616 Location: USA

Hey guys, i want to run some analysis / tests on different scheduling algorithms. Is there a system call or some other type of interface i can utilize to switch the kernels scheduler on the fly? Is there any documentation on this? Any pointers would be helpful. Thanks!

-Mike

eccerr0r · Posted: Wed Nov 11, 2009 1:19 am Post subject:

I don't think this is possible; this was part of the Con Kolvas scheduler issues; besides, if you rmmod the scheduler, what thread should the machine run next... I don't think there's a "default" as usually this would add more instruction latency to scheduling.

If you mean the disk scheduler, that already has an interface, can look at the anticipatory / deadline / cfs / NOP scheduler code...
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-=GGW=- $ol!d $n4>|e · Veteran Joined: 12 Apr 2004 Posts: 1616 Location: USA

what if i implement a system call to rmmod the scheduler and insmod a different one?

wait, can the scheduler even be modular? It seems odd to make a modular schedular.

eccerr0r · Posted: Wed Nov 11, 2009 4:18 am Post subject:

No, the Linux process scheduler is not modular. It would require quite a bit of work and performance overhead to modularize it.
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