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Message-ID: <005d01c1efcb$561b8c10$e6f7ae80@ad.uiuc.edu>
From: "Wanghong Yuan" <wyuan1@ews.uiuc.edu>
To: <linux-kernel@vger.kernel.org>
In-Reply-To: <20020427.194302.02285733.davem@redhat.com><467685860.avixxmail@nexxnet.epcnet.de> <20020428.204911.63038910.davem@redhat.com> <001001c1ef3d$890a6d50$e6f7ae80@ad.uiuc.edu>
Subject: Accurately measure CPU cycles used by a program? thanks
Date: Mon, 29 Apr 2002 17:15:14 -0500
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Is there any package or program, which can be used to accurately measure the
CPU cycles used by a program? I think the following code can only provide an
inaccurate one, beause it may count on the waiting time of the program.

gettimeofday(t1)
runprogam
gettimeofday(t2)
t2-t1

If I need to instrument the kernel, which part I should investigate? Thanks
a lot in advance

Wanghong

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