Messages in this thread | | | Date | Tue, 10 Nov 1998 10:50:49 +0100 | From | Harald Koenig <> | Subject | Re: Schedule idle |
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On Nov 09, yodaiken@chelm.cs.nmt.edu wrote:
> > my original feature request (which was solved for us by Ingo's SCHED_IDLE) > > was to run background jobs (esp. `rc5' that time) which shall _not_ > > (or only very minimally) compete with other running tasks, even with > > nive-19 tasks (because we're using NQS/LSF style batch jobs which are > > Why can't you run those tasks at nice 18?
because nice-18 and nice-19 jobs will compete significantly:
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND 24713 root 20 18 184 184 132 R N 0 55.0 0.5 0:31 idle 24714 root 20 19 184 184 132 R N 0 28.9 0.5 0:16 idle
backround jobs like rc5 _shall_not_ steal 30% cpu time from real important computation batch jobs but should only run when the system really is _idle_ otherwise. even nice-10 vs. nice-19 isnt' decoupled enough:
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND 24819 root 17 10 184 184 132 R N 0 84.1 0.5 0:50 idle 24820 root 20 19 184 184 132 R N 0 8.8 0.5 0:05 idle
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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