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For profiling, we can use perf in Linux. But all examples showing only executables.

In CentOS, is it possible to run perf tool on running process or daemon?

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perf record and perf stat support the -p option which you can use to specify the PID of the process to attach to. For example , the command:

perf stat -p 3129

tells perf stat to attach to the currently running process with PID 3129.

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