hi,
Joe asked about issues with LLC-load-misses on Haswell. I tried
and found it non functional on SandyBridge (42) as well:
[jolsa@krava perf]$ ./perf stat -e LLC-load-misses ls
...
Performance counter stats for 'ls':
<not supported> LLC-load-misses
0.007195547 seconds time elapsed
both SandyBridge (42 and 45) share following config arrays:
snb_hw_cache_event_ids and snb_hw_cache_extra_regs
but have different 'x86_pmu.extra_regs' which makes LLC-load-misses
event fail (in valid_mask check) in x86_pmu_extra_regs function
Haswell is sharing the same extra regs/ids config as SandyBridge (42),
so it suffers in the same way.
Not sure if thats known issue, but it looks like we need special
set of snb_hw_cache_event_ids for SandyBridge (42) ?
thanks for info,
jirka
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