Hi guys,
I'm trying to compare the values of the cache-related counters for the
functional and performance models and observing strange difference I can't
explain.
I'm running not-time-related benchmark and got the following values:
First row -- values for a functional model
Second row -- values for a performance model (arm_detailed)
L1I-misses: 8369552 / 9982538 (+19%)
L1D-misses: 10526355 / 37332430 (+350%)
L2(I)-misses: 516328 / 624030 (+20%)
L2(D)-misses: 3610866 / 3626699 (+0.4%)
L1I/L2(I)/L2(D) values look good to me.
We see slightly bigger values due to a speculative execution.
But the value for L1D is too big to be correct.
One potential explanation is the fact that multiple sequential accesses to the
same cache line are treated as different misses by performance model until the
data come from the next level cache.
Does it sound correct?
Thanks
Orangeade
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