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

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Date:	Tue, 13 Mar 2007 14:21:38 -0400
From:	Mark Lord <lkml@....ca>
To:	Con Kolivas <kernel@...ivas.org>
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

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%).

Cheers
           

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