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Date:      Sat, 31 Jan 2004 14:33:39 -0800
From:      Milo Hyson <milo@cyberlifelabs.com>
To:        freebsd-hackers@freebsd.org
Subject:   Weird context-switching performance
Message-ID:  <1075588419.43166.6.camel@beastie.lab.cyberlifelabs.com>

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We've got these two very similar machines that are exhibiting
drastically different context-switching performance. The slower of the
two is actually task-switching at four times the rate of the other.
We've gone through several benchmarks and are at a complete loss to
explain it. We've set up a page documenting our efforts:

http://www.cyberlifelabs.com/cs-benchmark/

I would appreciate it if someone could offer some insight into what
affects context-switching. Is there some obscure kernel variable that
we've overlooked? Or is it just one of those unexplainable feng-shui
situations?

Thanks in advance.

-- 
Milo Hyson
Chief "Mad" Scientist
CyberLife Labs, LLC



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