From: ebiederm@xmission.com (Eric W. Biederman)
To: Randy Appleton <rappleto@nmu.edu>
Cc: linux-mm@kvack.org
Subject: Re: MM performance benchmark
Date: 09 May 2001 08:20:23 -0600 [thread overview]
Message-ID: <m1oft2li3c.fsf@frodo.biederman.org> (raw)
In-Reply-To: Randy Appleton's message of "Mon, 07 May 2001 18:02:41 -0400"
Randy Appleton <rappleto@nmu.edu> writes:
> Hi!
>
> I'm a professor of computer science at Northern Michigan University.
> Three students and myself
> have been benchmarking the Linux kernel. At
> http://euclid.nmu.edu/~benchmark you will see
> graphs describing performance for mmap() and page faults.
>
> Both graphs show a huge improvement between 2.2 and 2.3. We see a 100x
> performance
> gain. My questions is ... Why has performance improved so much? What
> changed between
> 2.2 and 2.3 to account for a 100x performance improvement?
The page cache usage was rewritten to be threaded, and more
importantly to not double buffer data between the page cache and the
buffer cache.
Eric
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prev parent reply other threads:[~2001-05-09 14:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-07 22:02 MM performance benchmark Randy Appleton
2001-05-09 14:20 ` Eric W. Biederman [this message]
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