linux-kernel - Re: 2.6.21-rc3-mm1 RSDL results

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Date:	Wed, 14 Mar 2007 07:26:26 +1100
From:	Con Kolivas <kernel@...ivas.org>
To:	Mark Lord <lkml@....ca>
Cc:	Serge Belyshev <belyshev@...ni.sinp.msu.ru>,
	William Lee Irwin III <wli@...omorphy.com>,
	Matt Mackall <mpm@...enic.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org
Subject: Re: 2.6.21-rc3-mm1 RSDL results

On Wednesday 14 March 2007 05:21, Mark Lord wrote:
> Con Kolivas wrote:
> > Can you try the new version of RSDL. Assuming it doesn't oops on you it
> > has some accounting bugfixes which may have been biting you.
>
> Retesting today with 2.6.21-rc3-git7 + 2.6.21-rc3-sched-rsdl-0.30.patch.
>
> Still not pleasant to use the GUI with a kernel build (-j1 or -j2)
> happening unless the build is manually "nice'd".
>
> Also, accounting looks weird in top(1).
>
> With a 100% busy machine, top will show something like this :
> > top - 14:20:11 up 10:22,  1 user,  load average: 2.65, 2.80, 2.18
> > Tasks: 134 total,   4 running, 128 sleeping,   0 stopped,   2 zombie
> > Cpu(s): 68.7% us,  6.7% sy, 24.7% ni,  0.0% id,  0.0% wa,  0.0% hi,  0.0%
> > si Mem:   2076964k total,  2002560k used,    74404k free,   148924k
> > buffers Swap:  2409740k total,      244k used,  2409496k free,  1448876k
> > cached
> >
> >   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> >  1824 root      36  10 11748 7244 1936 R  4.0  0.3   0:00.12 cc1
> >  1845 root      31   0  8080 5272 1412 R  1.7  0.3   0:00.05 cc1
> >  4139 root      20   0  176m  35m 6860 S  1.3  1.7  18:59.35 Xorg
> > 29381 root      20   0 33712  16m  12m R  1.0  0.8   0:27.24 konsole
> >     3 root      20   0     0    0    0 S  0.3  0.0   0:00.49 events/0
> >  1529 root      20   0  2556 1460  752 S  0.3  0.1   0:00.05 make
> > 14623 root      20   0  2200 1144  860 R  0.3  0.1   0:00.89 top
> >     1 root      20   0  1568  532  464 S  0.0  0.0   0:00.22 init
> >     2 root      39  19     0    0    0 S  0.0  0.0   0:00.01 ksoftirqd/0
> >     4 root      20   0     0    0    0 S  0.0  0.0   0:00.00 khelper
> >     5 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kthread
>
> Mmm.. I wonder where all of that 100% CPU went to.. the busiest tasks
> are only showing up as 4.0% and 1.7% (when in fact they are using near
> 100%).

Nothing ever looks like it stays running for very long. That would be enough 
to account for this sort of top picture. What HZ are you running? Do you 
usually run two makes at different nice levels?

Thanks.

-- 
-ck
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