--Perry
>
> : Does Mr McVoy by any chance happen to have an "is L2 cache shared" detector
> : lurking in the lmbench and other magic ?
>
> Hmm. Not as such. I could probably make one. It would be a lot easier
> if Linux had a pin() function which pinned a process to a processor.
> SGI's interface looks like:
>
> sysmp(MP_MUSTRUN, cpuNumber);
>
> If I had that sucker, then I could pin two processes to two different
> processors, timing how long it took to touch powers of two size arrays
> with one process, then do the same thing with two processes. It shouldn't
> make any difference until you get out to >L2$ sizes if the caches are
> unshared.
>
> -
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-- Perry Harrington Linux rules all OSes. APSoft () email: perry@apsoft.com Think Blue. /\- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu