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ARM processor PMU counters not configured

xiaoyuan

I met an issue when I do profile with DS, the number and instructions and L1/L2 cache is zero.

the warning info is

 

CONFIG_HW_PERF_EVENTS flag is yes. Any suggestions ?

$ zcat /proc/config.gz | grep CONFIG_HW_PERF_EVENTS

CONFIG_HW_PERF_EVENTS=y

0