ck-sources

jsf_x35a · Posted: Sat May 26, 2007 1:42 am Post subject: ck-sources

Anyone here using the ck-sources? I wanted to try out the RSDL scheduler and wanted to see if anyone else is using the Con Kolivas patchset. If you are using it, has it given you any trouble? Is there anything else particularly impressive about the ck patchset besides the RSDL scheduler that I should know about?
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LoSeR_5150 · Posted: Sat May 26, 2007 2:45 am Post subject:

Many of the custom kernel patchsets such as viper-sources, skunk-sources, etc... include con's patches. I've always used kernel-sources with ck-patches and never had any problems(well not related to the patches :wink:

Anyways you may also want to check out the CFS scheduler by Ingo Molnar. Its included in kamikaze-sources, as well as skunk-sources and I'm sure some others. Hope this helps, and good luck.
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yngwin · Posted: Sat May 26, 2007 5:54 pm Post subject:

I would not want anything else than a ck-based kernel on my desktop.
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jsf_x35a · Posted: Sun May 27, 2007 2:42 am Post subject:

Well, I just had a first taste of Con Kolivas's code (his defrag script) and I must say, he is a good coder. The script is still in version 0.06 and it worked flawlessly. Before I ran it, 63% of the files were non-contiguous (6 year old HDD that I had never defragged), after running it, only 7%. So that gives me reason enough to go on and check out his kernel patches.

Anyway, has anyone tried out the RSDL scheduler? Would it be recommended to run the ck kernel on a laptop?
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Ingmarv · Posted: Sun May 27, 2007 8:35 am Post subject:

darkphader · Veteran Joined: 09 May 2002 Posts: 1225 Location: Motown

Where does one set the RSDL scheduler option in ck-sources?

Chris
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yngwin · Posted: Sun May 27, 2007 3:21 pm Post subject:

You can't. Whatever scheduler Con puts in his patchset, is the default.
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jsf_x35a · Posted: Mon May 28, 2007 2:13 am Post subject:

scottfk · n00b Joined: 18 May 2003 Posts: 44 Location: New York, NY

AS, DEADLINE, NOOP, and CFQ are all I/O schedulers. They divy up finite I/O bandwidth among the various processes running on a timeshare system.

Con's SD is a CPU scheduler. It divies up finite CPU time.
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yngwin · Posted: Mon May 28, 2007 1:29 pm Post subject:

jsf_x35a · Posted: Mon May 28, 2007 2:04 pm Post subject:

scottfk · n00b Joined: 18 May 2003 Posts: 44 Location: New York, NY

CFQ is enabled as the default by Con's patches. I've been using it for a few years now with no complaints.

Unlike CPU scheduler, you can change your I/O scheduler on the fly if you feel like trying something else. Different block devices can also use different I/O schedulers.

If you cat /sys/block/{your block device, e.g. sda}/queue/scheduler you will see a list of all the I/O schedulers compiled into your kernel, with the active scheduler in square brackets. You can set this by, as root, echoing the scheduler you want into the file.

echo cfq > /sys/block/sda/queue/scheduler
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