> > I played a bit with renicing my (mostly) CPU bound jobs and found > > somewhat strange behaviour. > > > > I'm on 2.6.22.2-cfs-v19.1 -- I can't boot into 2.6.23-rc3 as part of > > my daily work because my NVIDIA driver doesn't yet work with it though > > I could try to do some X-less testing if need be. > > Please do try, a lot has changed since v19.1.
Meanwhile I've done some testing on 2.6.23-rc3. The good news is that the strange behaviour w/r to nice I had seen on 2.6.22.3-cfs-v19.1 is no longer there. Long running CPU bound jobs at different nice levels do indeed progress (roughly) according to the %CPU figures as reported by top now. However what I find somewhat unexpected is the IMO huge variation in %CPU as observed even with 'top -d 60'. I've attached a log showing 5 CPU bound tasks observed for an our with 'top -b -d 60 -n 60'. Jobs 5897, 5928 and 5977 do perform essentially the same tasks. Jobs 17085 and 21492 do perform essentially the same task but differ from the other 3 task. I would have expected Jobs 5897 and 5928 to differ by at most one percent point when measured for 60 seconds. Best, Michael -- Technosis GmbH, Geschäftsführer: Heiko Gerdau, Tobias Dittmar Sitz Hamburg; HRB 89145 Amtsgericht Hamburg Vote against SPAM - see http://www.politik-digital.de/spam/ Michael Gerdau email: [EMAIL PROTECTED] GPG-keys available on request or at public keyserver
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