Weird context-switching performance

From: Milo Hyson (milo_at_cyberlifelabs.com)
Date: 01/31/04 

To: freebsd-hackers@freebsd.org
Date: Sat, 31 Jan 2004 14:33:39 -0800

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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Relevant Pages

  • Re: Weird context-switching performance
    ... On Sat, 31 Jan 2004, Milo Hyson wrote: ... > drastically different context-switching performance. ... The slower of the ... > two is actually task-switching at four times the rate of the other. ...
    (freebsd-hackers)
  • Re: Weird context-switching performance
    ... can probably conclude that beastie is running slower than it should. ... > On Sat, 31 Jan 2004, Milo Hyson wrote: ... >> drastically different context-switching performance. ... >> Chief "Mad" Scientist ...
    (freebsd-hackers)