-pg profiling instrumentation question

-pg profiling instrumentation question

[Juan Carlos Franzoy]

Hello.

I am having problems profiling an application and was
wondering if somebody there may help me.

I think the problem is that one of our libraries break
-pg instrumentation. I tried to make this post as
short as possible. Forgive  me if I did'nt make it.

This library hide portabilities issues under a
portable interface, allowing us to run in console
mode, in daemon mode  in unices or as a service in
windows. As you may guess, it is a complex library
that do a lot of things. I do not know which of these
are hurting -pg.

This pseudocode is a description of what I am doing.

void a() {}
void b() { for(int i=0; i < 10000; ++i) a(); }
void f() {}
void g() { for(int i=0; i < 10000; ++i) f(); }
class MyModule() ... {
public:
    ...
    void operator()() {
       ...
       // *2
       for(int i=0; i < 10000; ++i) g();
       return;
    }
} myModule( .... );
int main() {
   ...
   // *1
   for(int i=0; i < 10000; ++i) b();
   mylib::registerModule(myModule);
   mylib::run(); // create a thread per module
   ...
}

The problem is that the profiling information contain
time information for b() and a() but no for g() and
f(). On the other hand the call count is the same. 

--- gprof output ---
Flat profile:
Each sample counts as 0.01 seconds.
   %     self              self     total
 time  seconds    calls  ms/call  ms/call  name
50.00    0.22     10000     0.02     0.04  a()
29.55    0.13 100000000     0.00     0.00  b()
20.45    0.09         1    90.00    90.00 _static_init
 0.00    0.00 100000000     0.00     0.00  f()
 0.00    0.00     10000     0.00     0.00  g()
...
--- end of gprof output ---

Note: I already try making a sigprocmask, pthread_mask
to unblock SIGPROF in *1 and *2. I also verifíed that
the signal handler of SIGPROF is the same in *1 and
*2, it is a valid pointer, not SIG_DFL nor SIG_IGN.

If somebody can help will make me happy. Thanks.


------------------------------------------------------------
                      Juan Carlos Franzoy
                     Analista  Programador
                     Tel: +54-11-4780-2634
                  mailto:JCFranzoy@ats.com.ar
                     http://www.ats.com.ar
------------------------------------------------------------


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