Re: Alan Cox quote? (was: Re: accounting for threads)
Jonathan Lundell (jlundell@pobox.com)
Tue, 19 Jun 2001 10:36:00 -0700
At 9:09 AM -0700 2001-06-19, Larry McVoy wrote:
>Don't you think it is funny that Sun doesn't publish numbers comparing
>their thread performance to process performance? Sure, you can find
>context switch benchmarks where they have user level switching going on
>but those are a red herring. The real numbers you want are the kernel
>level context switches and those are just as expensive as the process
>context switch numbers.
Sun (or at least SPARC) is a bit of a special case, though. SPARC's
register-window architecture makes thread-switching (not to mention
recursion) significantly more expensive than on most other
architectures.
--
/Jonathan Lundell.
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