linux-kernel - Re: /proc/stat information incorrect

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Message-ID: <CABWpNyaw3Xq7FJ4A0itYEFLN1QdwBvvqs0rVxB1z-cyaUcmuVw@mail.gmail.com>
Date:	Tue, 17 Apr 2012 10:04:35 +0200
From:	Bas van der Oest <bassvdo@...il.com>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: /proc/stat information incorrect

> Assuming that you are on a recent kernel (>= 3.2), could you please
> try to revoke git commit a25cac5198d4ff28 "proc: Consider NO_HZ when
> printing idle and iowait times" and try again ?

I revoked the patch and this certainly had effect, however I still
doubt if the result is completely correct now.
It now seems that CPU4 (this one is handling the irqs now) spends more
time than the other CPUs:

        user    nice    system  idle    iowait  irq   softirq sum
cpu     4       0       412     8186    0       0       79      8681
cpu0    0       0       1       1074    0       0       1       1076
cpu1    0       0       2       1075    0       0       0       1077
cpu2    0       0       1       1075    0       0       0       1076
cpu3    0       0       1       1079    0       0       0       1080
cpu4    1       0       115     941     0       0       78      1135
cpu5    2       0       99      984     0       0       0       1085
cpu6    0       0       98      977     0       0       0       1075
cpu7    0       0       95      980     0       0       0       1075

Any suggestions where this small difference is coming from?
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