From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Clemens Kolbitsch <clemens.kol@gmx.at>
Subject: Re: [Qemu-devel] performance monitor
Date: Thu, 3 Jan 2008 21:29:06 +0000 [thread overview]
Message-ID: <200801032129.09756.paul@codesourcery.com> (raw)
In-Reply-To: <200801032136.27558.clemens.kol@gmx.at>
> ... Ok, to cut a long question short: Is there any hardware support im qemu
> for doing monitoring (that goes deeper than using "time") and has anyone
> ever tested something that could work?
Probably your application wants the performance counters. Qemu doesn't emulate
those.
Besides which, qemu is not cycle accurate. Any performance measurements your
make are pretty much meaningless, and bear absolutely no relationship to real
hardware.
Paul
next prev parent reply other threads:[~2008-01-03 21:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-03 20:36 [Qemu-devel] performance monitor Clemens Kolbitsch
2008-01-03 21:29 ` Paul Brook [this message]
2008-01-03 21:38 ` Clemens Kolbitsch
2008-01-03 22:07 ` Paul Brook
2008-01-03 22:11 ` Clemens Kolbitsch
2008-01-03 22:18 ` Paul Brook
2008-01-03 22:21 ` Clemens Kolbitsch
2008-01-03 22:19 ` Laurent Desnogues
2008-01-04 8:49 ` Rob Landley
2008-01-04 15:09 ` Clemens Kolbitsch
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