[MPICH] Profiling an application's network usage through MPI calls

[Diego M. Vadell]

William, Anthony,
   Thank you very much for your answers. I will investigate that way.

Regards,
 -- Diego


On Thursday 08 September 2005 16:01, William Gropp wrote:
> At 01:42 PM 9/4/2005, Diego M. Vadell wrote:
> >Hi,
> >    First of all, sorry if this is has a known answer, is a stupid
> > question, or
> >if Im out of place somehow. As I'm new to mpi and MPICH, I know I may have
> >wrong concepts.
> >    I co-administer a couple of clusters in the university of Buenos
> > Aires. I would like to know how does the MPI applications use the
> > network: for example, lots of short messages, some big messages, lots of
> > big messages, etc.
> >     My first thought was to use tcpdump and then process it's output.
> > Then I thought that if there were a log file where mpich left a timestamp
> > and the size of the MPI message each time it sends one, I would have more
> > accurate information.
> >
> >   My questions: is there any way to make MPICH leave such a log? also, is
> >there a better way to profile an application's network usage?
>
> One other tool that you might try is fpmpi (www.mcs.anl.gov/fpmpi ).  This
> is a summary tool that creates a text file during MPI_Finalize that
> summarizes the communication that took place during the run.  There are
> other, similar tools as well.  These tools all rely on the profiling (PMPI)
> interface, so you can easily customize them to your needs and they work
> with any MPI implementation.
>
> Bill
>
> >Thanks in advance,
> >  -- Diego.
>
> William Gropp
> http://www.mcs.anl.gov/~gropp