Am benchmarking dumb matrix multiplication in trying to perceive
performance drop in case when matrix cannot fit in L2 cache.  However,
on my machine L2 cache is large - 2MB, so 512x512 matrix of double
numbers is needed to fill the cache, and in that case multiplication
is taking rather long time.  So I'm wondering is there a way to
control (decrease) L2 cache size used by Linux?  Apologies if question
inappropriate for the list.

Thanks.
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