Hi nvdimm@, In the perf tool there are metrics for platforms like cascade lake where we're collecting data for optane memory [1] but if optane memory isn't installed then the counters will always read 0. Is there a relatively simple way of determining if Optane memory is installed? For example, the presence of a file in /sys/devices. I'd like to integrate detection of this and make the perf metrics more efficient for the case where Optane memory isn't installed.
Thanks, Ian Rogers [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json#n1134
