On Tue, 1 Oct 2002, Larry McVoy wrote:
> By the way, the place you will probably see variance in LMbench is in the
> context switch benchmarks, it's almost certainly due to randomness in
> cache layout and there isn't a thing we can do about it. You can run a
> zillion runs to get an average but please realize that is an *average*.
> The context switch number are accurate, the low ones represent no cache
> collisions and the high ones represent lots of cache collisions.
>
> FYI. I don't like it either.
Thank you, that explains some things I've seen in my context switching
benchmark as well, which uses a bunch of different services to transfer
tiny data from on process to another.
Time for some statistical jiggery-pokery, dust off deviant mean or some
such.
-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979.- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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