terminate called after throwing an instance of 'mperf::MperfError'

[wwangxinhao]

./cpu_pmu_transpose
1 1 INSTRUCTIONS
the warm iter 0, and time use 19.946565
the warm iter 1, and time use 13.541801
the warm iter 2, and time use 13.487423
the warm iter 3, and time use 13.471814
the warm iter 4, and time use 13.482091
terminate called after throwing an instance of 'mperf::MperfError'
what(): Failed to get a file descriptor for INSTRUCTIONS

[youzhedian]

请问是android平台吗？这种是event系统调用的访问权限问题，可以尝试
echo -1 > /proc/sys/kernel/perf_event_paranoid

[youzhedian]

或者检查一下/sys/bus/event_source/devices目录下有没有类似armv8_pmuv3这样的cpu pmu文件夹，因为有些嵌入式开发板上面就没有cpu pmu，所以自然就fail了