All of lore.kernel.org
 help / color / mirror / Atom feed
From: jerome lacoste <jerome.lacoste@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: 50% CPU user usage but top doesn't list any CPU unfriendly task
Date: Mon, 3 Jan 2005 22:46:40 +0100	[thread overview]
Message-ID: <5a2cf1f6050103134611114dbd@mail.gmail.com> (raw)

Hi,

on a fairly old box used as a desktop (PII 300 Mhz with 196M RAM), I
observe the following strange behavior which I believe comes from the
kernel.

There's a VoIP known 'P2P' closed source application running, an IP
tables based firewall and a remote ssh session initiated. When using
top, sorting by CPU usage, no program is using more than a couple of
percent of CPU. On the other side, the total CPU user time is at
around 40%, with a 1.5 load average. Memory looks OK. The machine is
responsive as usual.

So I wonder why the cpu user time is at 40% without any particular
program showing as using CPU in the top listing. 'Problem' was
reproducible with 2.4.x and now with 2.6.8.1.

So it this a real problem or is there something that I don't
understand in particular? Thanks for the insight.

Jerome

             reply	other threads:[~2005-01-03 21:46 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-03 21:46 jerome lacoste [this message]
2005-01-04  7:51 ` 50% CPU user usage but top doesn't list any CPU unfriendly task Norbert van Nobelen
2005-01-04 10:43   ` jerome lacoste
2005-01-05 11:16     ` Toon van der Pas

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=5a2cf1f6050103134611114dbd@mail.gmail.com \
    --to=jerome.lacoste@gmail.com \
    --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.