[Gllug] Profiling - where is all the time going?

[John Hearns]

On Tue, 2004-07-20 at 11:10, John Winters wrote:
> Hi all,
> 
> I'm experimenting with profiling a compute intensive program.  It does
> practically no i/o and it isn't memory bound - it just thinks hard.
> 
> I've compiled and linked with -pg and I seem to be getting a reasonably
> meaningful output except for one thing.  If I let the program run for 60
> seconds and then examine the profiling information I'm told that the
> cumulative time used by all the functions is 10.77 seconds.  Where could
> the other 49 seconds be going?


I'll also say to look at Oprofile. I set up a system running Oprofile 
in the past, which was used by someone in the Atlas collaboration to
profile their simulation codes.


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