Hi all Thanks for all the input. I have not gotten around to try any of the tools (Sun Studio, Tau or vprof). Actually, i can't compile vprof - make fails with exec.cc: In static member function ‘static void BFDExecutable::find_address_in_section(bfd*, asection*, void*)’: exec.cc:144: error: ‘bfd_get_section_size_before_reloc’ was not declared in this scope Does anybody have an idea how to get around this problem?
Anyway, the GMON_OUT_PREFIX hint was very helpful - thanks, Jason! If i get vprof or one of the other tools running, i'll write something up - perhaps the profiling subject would be worthy for a FAQ entry... Thanks Jody On Thu, Apr 23, 2009 at 9:12 AM, Daniel Spångberg <dani...@mkem.uu.se> wrote: > I have used vprof, which is free, and also works well with openmpi: > http://sourceforge.net/projects/vprof/ > > One might need slight code modifications to get output, depending on > compilers used, such as adding > vmon_begin(); > to start profiling and > vmon_done_task(rank); > to end profiling where rank is the MPI rank integer. > > vprof can also use papi, but I have not (yet) tried this. > > Daniel Spångberg > > > Den 2009-04-23 02:00:01 skrev Brock Palen <bro...@umich.edu>: > >> There is a tool (not free) That I have liked that works great with OMPI, >> and can use gprof information. >> >> http://www.allinea.com/index.php?page=74 >> >> Also I am not sure but Tau (which is free) Might support some gprof >> hooks. >> http://www.cs.uoregon.edu/research/tau/home.php >> >> Brock Palen >> www.umich.edu/~brockp >> Center for Advanced Computing >> bro...@umich.edu >> (734)936-1985 >> >> >> >> On Apr 22, 2009, at 7:37 PM, jgans wrote: >> >>> Hi, >>> >>> Yes you can profile MPI applications by compiling with -pg. However, by >>> default each process will produce an output file called "gmon.out", which is >>> a problem if all processes are writing to the same global file system (i.e. >>> all processes will try to write to the same file). >>> >>> There is an undocumented feature of gprof that allows you to specify the >>> filename for profiling output via the environment variable GMON_OUT_PREFIX. >>> For example, one can set this variable in the .bashrc file for every node to >>> insure unique profile filenames, i.e.: >>> >>> export GMON_OUT_PREFIX='gmon.out-'`/bin/uname -n` >>> >>> The filename will appear as GMON_OUT_PREFIX.pid, where pid is the process >>> id on a given node (so this will work when multiple nodes are contained in a >>> single host). >>> >>> Regards, >>> >>> Jason >>> >>> Tiago Almeida wrote: >>>> >>>> Hi, >>>> I've never done this, but I believe that an executable compiled with >>>> profilling support (-pg) will generate the gmon.out file in its current >>>> directory, regardless of running under MPI or not. So I think that you'll >>>> have a gmon.out on each node and therefore you can "gprof" them >>>> independently. >>>> >>>> Best regards, >>>> Tiago Almeida >>>> --------------------------------- >>>> jody wrote: >>>>> >>>>> Hi >>>>> I wanted to profile my application using gprof, and proceeded like >>>>> when profiling a normal application: >>>>> - compile everything with option -pg >>>>> - run application >>>>> - call gprof >>>>> This returns a normal-looking output, but i don't know >>>>> whether this is the data for node 0 only or accumulated for all nodes. >>>>> >>>>> Does anybody have experience in profiling parallel applications? >>>>> Is there a way to have profile data for each node separately? >>>>> If not, is there another profiling tool which can? >>>>> >>>>> Thank You >>>>> Jody >>>>> _______________________________________________ >>>>> users mailing list >>>>> us...@open-mpi.org >>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>>> >>>>> >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > -- > Daniel Spångberg > Materialkemi > Uppsala Universitet > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
