[PATCH] possible fix for the runtime going backwards warnings

Andrey Chernov ache at FreeBSD.ORG
Wed Feb 22 05:25:13 PST 2006


On Tue, Feb 21, 2006 at 09:36:46PM -0500, Kris Kennaway wrote:
> On Tue, Feb 21, 2006 at 10:47:04AM -0500, John Baldwin wrote:
> > The latest round of calcru() changes accidentally changed calccru() to use the 
> > wrong rusage_ext structure (p->p_rux vs p->p_crux) when calculating usage 
> > times for children.  The patch fixes calccru() to use p->p_crux again.  It 
> > also moves the ruadd() in exit1() even later in the function so that it takes 
> > the dying thread's last time slice into account.  Please test it and let me 
> > know if it makes the messages go away (or if it makes things worse!)  Thanks!
> > 
> > http://www.FreeBSD.org/~jhb/patches/calccru.patch
> 
> I think you committed this already, right?
> 
> I'm still getting calcru spam on the 3 SMP machines that I upgraded
> with fresh sources:

I too (but less than before patch), UP machine:

Feb 22 03:37:45 pobrecita kernel: calcru: runtime went backwards from 292542 usec to 292537 usec for pid 29 (pagezero)
Feb 22 03:37:45 pobrecita kernel: u 0:0/0 s 38:292542/292537 i 0:0/0

-- 
http://ache.pp.ru/
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