CODEWITHSUNDEEP
linuxperformanceprofilingperf
ShrinivasD
ShrinivasD

Reputation: 63

Time consumption of functions of a process in linux

We are porting our application from solaris to linux. Few workflows in linux application are taking more time than solaris application. I have used solaris studio profiler to analyze at function level that gives me time consumed by each function. But in linux I explored perf tool, I could not find out How can I attach perf to a running application and did not find out any command which will print the time consumed by each function of a process. Thanks in advance.

Upvotes: 0

Views: 1006

Answers (1)

andreee
andreee

Reputation: 4679

Attaching to a process is done by using the -p option in perf record (from man perf-record):

   -p, --pid=
       Record events on existing process ID (comma separated list).

So assuming that your process has ID 12345, you can attach to it with (enabling call-graphs with -g):

perf record -g -p 12345

perf will then automatically write perf.data when the process terminates. You can then examine the file by calling

perf report

I hope this helps.

Upvotes: 2

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