All of lore.kernel.org
 help / color / mirror / Atom feed
From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-kernel@vger.kernel.org
Subject: Very high CPU values in top on idle system (3.0-rc1)
Date: Mon, 30 May 2011 19:39:16 +0200	[thread overview]
Message-ID: <20110530173916.GA1746@x4.trippels.de> (raw)

I get very high CPU values when I run 'top' on my (mostly) idle system
with 3.0-rc1. For example mpd was always in the 1-2% range and is now
constantly over 50%. 

This is caused by:

commit 317f394160e9beb97d19a84c39b7e5eb3d7815a8
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date:   Tue Apr 5 17:23:58 2011 +0200

    sched: Move the second half of ttwu() to the remote cpu

When I revert the above I see sane CPU values again.
-- 
Markus

             reply	other threads:[~2011-05-30 17:39 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-30 17:39 Markus Trippelsdorf [this message]
2011-05-30 18:05 ` Very high CPU values in top on idle system (3.0-rc1) Peter Zijlstra
2011-05-30 18:23   ` Markus Trippelsdorf
2011-05-30 20:45     ` Markus Trippelsdorf
2011-05-30 22:12       ` Peter Zijlstra
2011-05-31  9:55         ` Peter Zijlstra
2011-05-31 10:04           ` Markus Trippelsdorf
2011-05-31 12:31           ` [tip:sched/urgent] sched: Fix cross-cpu clock sync on remote wakeups tip-bot for Peter Zijlstra
2011-05-31 12:56             ` Borislav Petkov
2011-05-31 13:11               ` Peter Zijlstra
2011-06-01  7:05                 ` Borislav Petkov
2011-06-01 10:36                   ` Peter Zijlstra
2011-06-01 15:50                     ` Borislav Petkov
2011-06-02  7:52                       ` Yong Zhang
2011-06-02 13:04                         ` Peter Zijlstra
2011-06-02 14:23                           ` Yong Zhang
2011-06-02 15:48                             ` Peter Zijlstra
2011-06-03  6:49                               ` Yong Zhang
2011-06-07 13:12                               ` Borislav Petkov
2011-06-07 13:16                                 ` Peter Zijlstra
2011-06-03  9:57                             ` Milton Miller
2011-06-03 10:36                               ` Peter Zijlstra
2011-06-03 10:55                                 ` Peter Zijlstra
2011-06-03 10:58                                   ` Peter Zijlstra

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20110530173916.GA1746@x4.trippels.de \
    --to=markus@trippelsdorf.de \
    --cc=a.p.zijlstra@chello.nl \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.