Date: Sat, 28 Nov 2020 13:22:55 -0600 From: Scott Bennett <bennett@sdf.org> To: ihor@antonovs.family Cc: freebsd-questions@freebsd.org Subject: Re: Profiling C application Message-ID: <202011281922.0ASJMtiH020409@sdf.org>
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On Fri, 27 Nov 2020 19:38:28 -0800 Ihor Antonov <ihor@antonovs.family>
wrote:
>What can I use on FreeBSD to profile a slow application?
>
>I have a source code of the application and I can rebuild it if necessary.
>
>I want to see where (in what functions) application spends most of its
>time - amount of function calls and duration of each call (per call)
>
>What tools can you recommend to do this?
>
I see you already have one response at least to your question, but
perhaps a simpler one is to use a now ancient BSD UNIX tool called gprof(1),
along with the compiler option -pg. (See the gprof(1) man page for the
details.) Note, too, that you may want to link your program to the profiling
versions of system libraries as explained in the man page.
Scott Bennett, Comm. ASMELG, CFIAG
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