On Mon, Mar 16, 2009 at 3:41 PM, Carlos E. R. <robin.listas@telefonica.net> wrote:
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On Sunday, 2009-03-15 at 15:42 +0100, Per Jessen wrote:
Carlos E. R. wrote:
renice it to 19.
Yes, I can do that by hand, but my question is more general: could not the kcryptd process inherit the niceness of the calling process?
And that hack requires being root.
Ie, what's the use of having a user process running "very nice", if the system processes it calls run at high priority? The purpose of "nice" is defeated.
Well, not entirely. When you give your process a lower priority it will be given less resources - unless there is plenty of them. If your process doesn't run, I'm sure kcrypt won't be either. Maybe try renicing your process to -19 and see what happens then.
Ok, I'm running a copy of 4.4G right now. The cp process uses under 10% (running nice 19), but the two kcryptd processes (source and destination) use about the rest, 60..80%. I can type this mail easily, but closing the folder and opening another takes nearly a minute. Well, that's not too fair, it is i/o bound. If I wanted to watch a movie, say, while I wait the copy process or the par2 run (about 90 minutes per DVD), the movie doesn't run smoothly, because it doesn't have enough cpu available. I'd have to run xine at a higher priority, as user, than the kcryptd process.
You could experiment with ionice. I have never used it, but in theory you can tell it to make running apps only do i/o if the machine is idle. HTH Greg -- Greg Freemyer Head of EDD Tape Extraction and Processing team Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer First 99 Days Litigation White Paper - http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org