Ingo Molnar wrote:
When there are two (or more) hw metrics to profile, the ideally best (i.e. the statistically most stable and most relevant) sampling for the two statistical variables (say of l2_misses versus l2_accesses) is to sample them independently, via their own metric. Not via a static 1khz rate - or via picking one of the variables to generate samples.
Regardless of sampling method, don't you still want some way to enable/disable the various counters as close to simultaneously as possible?
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