linux-kernel - Re: [REGRESSION] [Linux 3.2] top/htop and all other CPU usage

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Date:	Tue, 29 Nov 2011 18:23:05 +0100
From:	Ian Kumlien <pomac@...or.com>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	linux-kernel@...r.kernel.org, rjw@...k.pl, tino.keitel@...ei.de,
	t.artem@...os.com
Subject: Re: [REGRESSION] [Linux 3.2] top/htop and all other CPU usage

On tis, 2011-11-29 at 08:52 +0100, Michal Hocko wrote:
> On Mon 28-11-11 23:28:03, pomac@...or.com wrote:
> > Hi, 
> > 
> > All this time i have been thinking i'm the only one - and i've been to
> > loaded with work during working hours and tired when home =P
> > 
> > Anyways, I've neen seeing this since -rc1 on:
> > Intel(R) Core(TM) i5 CPU U520  @ 1.07GHz - x86-64
> > AMD Phenom(tm) II X6 1090T - x86-64
> > AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ - x86-64
> > Intel(R) Core(TM)2 CPU T7200  @ 2.00GHz - i686
> > 
> > Configs available on demand - I've been running the same config for
> > quite some time though.
> 
> As I have written in other email could you post your config and collect
> the following data?
> for i in `seq 30`; 
> do 
>         cat /proc/stat > `date +'%s'`
>         sleep 1
> done
> export old_user=0 old_nice=0 old_sys=0 old_idle=0 old_iowait=0; 
> 
> # for all your available CPUs
> grep cpu0 * | while read cpu user nice sys idle iowait rest; 
> do 
>         echo $cpu $(($user-$old_user)) $(($nice-$old_nice)) $(($sys-$old_sys)) $(($idle-$old_idle)) $(($iowait-$old_iowait))
>         old_user=$user old_nice=$nice old_sys=$sys old_idle=$idle old_iowait=$iowait
> done

1322587011:cpu0 5838553 164 1252921 1844674407370 78234
1322587012:cpu0 4 0 1 0 0
1322587013:cpu0 4 0 2 0 0
1322587014:cpu0 2 0 1 0 0
1322587015:cpu0 3 0 2 0 0
1322587016:cpu0 7 0 2 0 4
1322587017:cpu0 2 0 2 0 0
1322587018:cpu0 1 0 1 0 0
1322587019:cpu0 4 0 2 0 1
1322587020:cpu0 5 0 3 0 5
1322587021:cpu0 7 0 1 0 3
1322587022:cpu0 4 0 2 0 0
1322587023:cpu0 4 0 2 0 0
1322587024:cpu0 3 0 3 0 0
1322587025:cpu0 3 0 1 0 0
1322587026:cpu0 4 0 2 0 4
1322587027:cpu0 2 0 2 0 0
1322587028:cpu0 2 0 1 0 0
1322587029:cpu0 4 0 1 0 0
1322587030:cpu0 5 0 1 0 0
1322587032:cpu0 5 0 1 0 4
1322587033:cpu0 6 0 1 0 0
1322587034:cpu0 1 0 2 0 0
1322587035:cpu0 3 0 2 0 0
1322587036:cpu0 3 0 1 0 0
1322587037:cpu0 4 0 2 0 2
1322587038:cpu0 4 0 1 0 0
1322587039:cpu0 2 0 1 0 0
1322587040:cpu0 3 0 1 0 0
1322587041:cpu0 4 0 3 0 0

1322587011:cpu1 5944677 172 1287816 1844674407370 871
1322587012:cpu1 4 0 2 0 0
1322587013:cpu1 2 0 2 0 0
1322587014:cpu1 3 0 0 0 0
1322587015:cpu1 3 0 1 0 9
1322587016:cpu1 22 0 3 0 18
1322587017:cpu1 10 0 3 0 13
1322587018:cpu1 3 0 1 0 0
1322587019:cpu1 4 0 3 0 14
1322587020:cpu1 14 0 2 0 7
1322587021:cpu1 16 0 1 0 2
1322587022:cpu1 5 0 0 0 0
1322587023:cpu1 7 0 1 0 0
1322587024:cpu1 8 0 1 0 0
1322587025:cpu1 2 0 2 0 0
1322587026:cpu1 4 0 2 0 5
1322587027:cpu1 7 0 2 0 0
1322587028:cpu1 5 0 0 0 0
1322587029:cpu1 4 0 2 0 0
1322587030:cpu1 6 0 0 0 0
1322587032:cpu1 3 0 2 0 0
1322587033:cpu1 6 0 1 0 0
1322587034:cpu1 2 0 1 0 0
1322587035:cpu1 4 0 2 0 0
1322587036:cpu1 3 0 1 0 0
1322587037:cpu1 4 0 0 0 0
1322587038:cpu1 8 0 1 0 0
1322587039:cpu1 4 0 2 0 0
1322587040:cpu1 4 0 0 0 0
1322587041:cpu1 8 0 1 0 0

For me the cpu usage is sporadic and only shows up as user or kernel,
nothing else.

-- 
Ian Kumlien  -- http://demius.net || http://pomac.netswarm.net

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