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Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
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From:
Ingo Molnar <mingo@...>
To: Christian Borntraeger <borntraeger@...>
Cc: Balbir Singh <balbir@...>, Frans Pop <elendil@...>, Chuck Ebbert <cebbert@...>, Greg KH <greg@...>, <stable@...>, <linux-kernel@...>, Andrew Morton <akpm@...>, Peter Zijlstra <a.p.zijlstra@...>
Subject:
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
Date: Monday, October 29, 2007 - 4:41 pm
* Christian Borntraeger <borntraeger@de.ibm.com> wrote:
quoted text
> > - return clock_t_to_cputime(utime); > > + p->prev_utime = max(p->prev_utime, clock_t_to_cputime(utime)); > > + return p->prev_utime; > > } > [...] > > I dont think it will work. It will make utime monotic, but stime can > still decrease. For example let sum_exec_runtime increase by a tiny > little bit while utime will get a full additional tick. stime is > sum-utime. So stime can still go backwards. So I think that we need > this kind of logic for stime as well, no?
yeah, probably. Peter? Ingo -
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Messages in current thread:
2.6.23 regression: top displaying 9999% CPU usage
, Frans Pop
, (Fri Oct 12, 4:31 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Greg KH
, (Fri Oct 12, 5:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Frans Pop
, (Sat Oct 13, 3:53 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Christian Borntraeger
, (Sun Oct 14, 4:36 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Christian Borntraeger
, (Tue Oct 16, 4:29 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Tue Oct 16, 5:30 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Christian Borntraeger
, (Tue Oct 16, 6:34 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Tue Oct 16, 8:59 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Frans Pop
, (Mon Oct 29, 8:05 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Mon Oct 29, 8:31 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Ingo Molnar
, (Mon Oct 29, 4:04 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Mon Oct 29, 5:43 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Christian Borntraeger
, (Tue Oct 30, 1:56 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Tue Oct 30, 2:00 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Frans Pop
, (Mon Oct 29, 7:19 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Mon Oct 29, 7:24 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Ingo Molnar
, (Mon Oct 29, 7:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Otavio Salvador
, (Tue Oct 30, 4:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Christian Borntraeger
, (Mon Oct 29, 4:33 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Ingo Molnar
, (Mon Oct 29, 4:41 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Frans Pop
, (Mon Oct 29, 5:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Peter Zijlstra
, (Mon Oct 29, 5:11 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Frans Pop
, (Tue Oct 16, 6:11 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
, Balbir Singh
, (Tue Oct 16, 6:38 am)
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