From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: Strange CPU usage pattern in SMP guest
Date: Sun, 21 Mar 2010 14:19:40 +0200
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References: <20100321001304.B8EAF30301DA@mail.linux-ag.de> <4BA5F03C.1020900@redhat.com> <20100321120236.55228A0015@mail.linux-ag.de>
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To: Sebastian Hetze <s.hetze@linux-ag.com>
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On 03/21/2010 02:02 PM, Sebastian Hetze wrote:
>
> 12:46:02     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle
> 12:46:03     all    0,20   11,35   10,96    8,96    0,40    2,99    0,00    0,00   65,14
> 12:46:03       0    1,00   11,00    7,00   15,00    0,00    1,00    0,00    0,00   65,00
> 12:46:03       1    0,00    7,14    2,04    6,12    1,02   11,22    0,00    0,00   72,45
> 12:46:03       2    0,00   15,00    1,00   12,00    0,00    1,00    0,00    0,00   71,00
> 12:46:03       3    0,00   11,00   23,00    8,00    0,00    0,00    0,00    0,00   58,00
> 12:46:03       4    0,00    0,00   50,00    0,00    0,00    0,00    0,00    0,00   50,00
> 12:46:03       5    0,00   13,00   20,00    4,00    0,00    1,00    0,00    0,00   62,00
>
> So it is only CPU4 that is showing this strange behaviour.
>    

Can you adjust irqtop to only count cpu4?  or even just post a few 'cat 
/proc/interrupts' from that guest.

Most likely the timer interrupt for cpu4 died.

-- 
error compiling committee.c: too many arguments to function