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Re: Profiling libraries

From: Daniel Kegel <dank at kegel dot com>
To: Linux Newbie <linux_newbie2004 at yahoo dot com>
Cc: crossgcc at sources dot redhat dot com
Date: Thu, 15 Jul 2004 12:13:34 -0700
Subject: Re: Profiling libraries
References: <20040715190926.20248.qmail@web90005.mail.scd.yahoo.com>

Linux Newbie wrote:

I am trying to profile a program which uses zlib1.2.1 i.e. libz.so.1.2.1
As I read on internet, it is easier to get profile data when linked statically.
so I am trying that first.
1st: Just compile source of the lib with -pg option. Compile example.c, that comes with zlib , with -pg option statically linked the libz.a Run the make test, it also executes example and creates gmon.out gprof ./example It shows all the lib functions in the profile , but timing is 0.00 for all


A couple questions:
1. did you compile and link the main program with -pg?
2. was runtime long enough (tens of seconds) to accumulate
sufficient samples?

- Dan

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References:
- Profiling libraries
  - From: Linux Newbie

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