From: Andi Kleen <ak@muc.de>
To: Mike Snitzer <snitzer@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Fwd: dm perf scales poorly with 2.6.x kernel
Date: Thu, 17 Feb 2005 07:25:48 +0100 [thread overview]
Message-ID: <m14qgb3doz.fsf@muc.de> (raw)
In-Reply-To: <170fa0d20502161504f8db91b@mail.gmail.com> (Mike Snitzer's message of "Wed, 16 Feb 2005 16:04:57 -0700")
Mike Snitzer <snitzer@gmail.com> writes:
>
> Ultimately there appears to be a disproportionate increase in the DM
> performance hit as the IO throughput capability of the underlying
> block device increases (I'm obviously using a limited sampling so...).
> But given the current results it is clear there will be a performance
> hit associated with using DM; but having that hit be fixed as the
> throughput scales would be ideal.
You could do a oprofile run to see where to CPU time is going to
and post the results.
-Andi
prev parent reply other threads:[~2005-02-17 6:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-16 4:08 dm perf scales poorly with 2.6.x kernel Mike Snitzer
2005-02-16 23:04 ` Fwd: " Mike Snitzer
2005-02-17 6:25 ` Andi Kleen [this message]
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