Messages in this thread | | | From | Al Boldi <> | Subject | decrease L2 cache size used by Linux? | Date | Sat, 17 Mar 2007 00:55:27 +0300 |
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Guerreiro da Luz wrote: > 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.
You may want to turn off randomization,
echo 0 > /proc/sys/kernel/randomize_va_space echo 1 > /proc/sys/vm/vdso_enabled
And see if that helps.
Thanks!
-- Al
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