linux-kernel - Re: PROBLEM: high load average when idle

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Message-ID: <20071003094010.GA635@ds20.borg.net>
Date:	Wed, 3 Oct 2007 09:40:10 +0000
From:	Thorsten Kranzkowski <dl8bcu@...bcu.de>
To:	Anders Bostr?m <anders@...trom.dyndns.org>
Cc:	linux-kernel@...r.kernel.org, arjan@...ux.intel.com, akpm@...l.org,
	torvalds@...l.org
Subject: Re: PROBLEM: high load average when idle

On Tue, Oct 02, 2007 at 11:37:31PM +0200, Anders Bostr?m wrote:
> Hi!
> 
> My computer suffers from high load average when the system is idle,
> introduced by commit 44d306e1508fef6fa7a6eb15a1aba86ef68389a6 .

Another datapoint: I observe a similar effect on both of my alphas:

top - 09:30:43 up 13 min, 18 users,  load average: 0.65, 0.64, 0.44
Tasks:  76 total,   1 running,  75 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.1% us,  0.5% sy,  0.0% ni, 99.1% id,  0.2% wa,  0.1% hi,  0.0% si
Mem:   2067792k total,    55792k used,  2012000k free,     4160k buffers
Swap:  1048560k total,        0k used,  1048560k free,    18752k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  637 root      15   0  2904 1552 1192 R    1  0.1   0:01.35 top
  556 root      15   0  2008  528  432 S    0  0.0   0:00.01 gpm
    1 root      15   0  1960  800  680 S    0  0.0   0:01.43 init
    2 root      10  -5     0    0    0 S    0  0.0   0:00.00 kthreadd
    3 root      RT  -5     0    0    0 S    0  0.0   0:00.00 migration/0
    4 root      34  19     0    0    0 S    0  0.0   0:00.00 ksoftirqd/0
    5 root      RT  -5     0    0    0 S    0  0.0   0:00.00 watchdog/0
    6 root      RT  -5     0    0    0 S    0  0.0   0:00.00 migration/1
    7 root      34  19     0    0    0 S    0  0.0   0:00.00 ksoftirqd/1

This is the dual-ev6 one, currently 2.6.22-rc5. 

I didn't bother to do any investigation, yet ;-)


> This fixes the problem:

I'll check this evening.

Bye,
Thorsten


-- 
| Thorsten Kranzkowski        Internet: dl8bcu@...bcu.de                      |
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