linux-kernel - Re[4]: High kernel CPU usage when copying files

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Message-Id: <E1LxOBM-000LZa-00.dendron2000-mail-ru@f160.mail.ru>
Date:	Fri, 24 Apr 2009 20:23:20 +0400
From:	Rutkov Denis <dendron2000@...l.ru>
To:	Heinz Diehl <htd@...cy-poultry.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re[4]: High kernel CPU usage when copying files

In idle state have 0 of these "D-state" processes. During file copying I have 1-2 of them.

Using sar I've collected the following statistics: during file copying system load raises to 30% (from 5%), user load raises to 15% (from about 7%) and io wait raises to 60% (from 0-1%). Idle part drops to 0% (from about 87%).

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