> > 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
Attachment:
top2.log.bz2
Description: BZip2 compressed data
Attachment:
signature.asc
Description: This is a digitally signed message part.
- References:
- 2.6.22.2-cfs-v19.1 stops honouring nice 3 after some hours
- From: Michael Gerdau <[email protected]>
- Re: 2.6.22.2-cfs-v19.1 stops honouring nice 3 after some hours
- From: Peter Zijlstra <[email protected]>
- 2.6.22.2-cfs-v19.1 stops honouring nice 3 after some hours
- Prev by Date: Re: [Devel] [-mm PATCH 1/9] Memory controller resource counters (v6)
- Next by Date: Re: [PATCH 2/3] dma: override "dma_flags_set_dmaflush" for sn-ia64
- Previous by thread: Re: 2.6.22.2-cfs-v19.1 stops honouring nice 3 after some hours
- Next by thread: 2.6.23-rc3 and SKY2 driver issue
- Index(es):
 |