Messages in this thread | | | From | Reid Kleckner <> | Date | Wed, 3 Nov 2010 18:15:10 -0400 | Subject | Re: perf tools miscellaneous questions |
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On Wed, Nov 3, 2010 at 5:43 PM, Frederic Weisbecker <fweisbec@gmail.com> wrote: >> What's exactly the 'cache-misses' event ? does it include both instructions >> _and_ data cache misses ? both L1 and L2 caches ? >> >> I was expecting so but the following command makes me wondering: >> >> $ perf stat -e cache-misses:u,l1d-loads-misses:u true >> Performance counter stats for 'true': >> >> 763 cache-misses >> 874 L1-dcache-load-misses >> >> 0.000916609 seconds time elapsed >> >> Here cache-misses < L1-dcache-load-misses. > > > > Dunno, will let others answer.
I think it corresponds to last level cache misses, which makes sense here. The difference in the two numbers represents hits to L2 (and L3 if it exists).
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