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.
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