This kind of problem could be solved by cache coloring. There should be some
patch available for Linux. I don't know if the other OSes you tried
implement cache coloring, though.
Jun
> -----Original Message-----
> From: Igor Schein [mailto:igor@txc.com]
> Sent: Tuesday, December 03, 2002 6:09 PM
> To: linux-kernel@vger.kernel.org
> Subject: performance of cache-intensive applications
>
> Hi,
>
> I am using an open-source application on ix86 to perform a task which
> is cache-intensive. When I run consecutive iterations of the task on
> a fixed input, the variance in timing of each iteration is extemely
> high. Needless to say, the test machine is always non-occupied.
>
> On every other OS I tried, Solaris, HPUX, FreeBSD and Tru64, the
> timing is very consistent between the iterations. My question is, are
> there known issues with L2 cache reuse in Linux kernel?
>
> I can provide any necessary information for anyone interested in
> addressing this issue, but I purposely skipped most technical details
> in this post to keep it simple.
>
> Thanks in advance.
>
> Igor
>
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