使用oProfile时可以指定一个CPU内核吗？

Question

I need to do a performance counter analysis on a 8-core server using oProfile, can oProfile only record events on core 7? Thank you!

Answer 1

The operf man page does not describe such an option (which would seem like the --cpu option of the perf record command).

With operf you can try the --separate-cpu / -c option ( This option categorizes samples by cpu ) with the --system-wide option ( This option is for performing a system-wide profile. ), and then provide a cpu:cpulist profile specification for opreport ( Only consider profiles for the given numbered CPU ).

For example:

$ sudo operf --separate-cpu --system-wide
  ... <Ctrl-C or kill -SIGINT>

$ opreport cpu:0