Change the name of gmon.out file when compiling with -pg

Question

Is it possible to change the default name of the file gmon.out, which is created when the profile flag (-pg) is set when compiling with gcc, to, for example, [executable name].gmon.out?

I need this because I have more than one executables, which are located in the same directory, and have to run parallel.

alk · Accepted Answer · 2019-11-05T05:29:45.600

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Not so short, but actually the answer is YES - if using glibc (at least with version 2.11.1, which is the version I used to test this).

To have your -pg compiled and linked executable create different names then the default gmon.out, just set the environment variable GMON_OUT_PREFIX to a value of your choice and the profiling output will be written to [value of your choice].[pid] where [pid] is the process-ID of the process the profiling data belongs to.

edited Nov 05 '19 at 05:29

answered Apr 06 '11 at 09:50

alk

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A little late, but thank you very much for the answer. I'll keep that in mind. :) – Emiswelt Apr 17 '11 at 11:53
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You should really accept this answer, the other is simply false. – drrlvn Mar 27 '13 at 22:28

score 0 · Answer 2 · answered Aug 30 '10 at 18:12

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In short, no. The profiling file created by running your program once it has been compiled with the -pg command is ALWAYS called gmon.out. However, once produced you can safely rename it to something else (for example foo.bar) and analyse it later using the command:

gprof test.exe foo.bar > analysis.txt

answered Aug 30 '10 at 18:12

Mark Bell

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Thanks for your effort. Since this is not possible, I am now profiling with cachegrind and valgrind. This worked out for me. – Emiswelt Aug 31 '10 at 13:48

Change the name of gmon.out file when compiling with -pg

2 Answers2