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

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Date:	Tue, 29 Nov 2011 19:37:22 +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 18:56 +0100, Michal Hocko wrote:
> On Tue 29-11-11 18:31:00, Ian Kumlien wrote:
> > 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
> > 
> > Sorry, the previous one was AMD X2 4400+ and now the T7200:

--8<-- [data] --8<--

> OK, so the same thing as in another email in the thread (no idle/io_wait
> accounting).
> Could you double check what kind of idle driver are you using?
> cat /sys/devices/system/cpu/cpuidle/current_driver

"none", on both machines

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

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