Re: Performance Comparision
Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 4 May 1999 13:50:50 +0100 (BST)
> Can you do latency tests with lmbench to compare the results between
> FreeBSD and Linux on the same machine? I have seen big differences in
> memory latency between Tru64 and Alpha/Linux on identical Alpha hardware.
>
> I think that it might be a combination of cache-sloshing and lack of page
> coloring, but I haven't had time to track it down more.
>
> This might be what FreeBSD does better than Linux, and you are seeing the
> results with the HINT benchmark.
For x86 Im beginning to wonder if the FPU save/restore is at least one of
the L1 cache munchers. If so the effect should be visible on 2.2 x86 but
not as much on 2.0 x86. That would be worth knowing
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