I can't turn it off right now to look in BIOS (the computer is not at home), but I think the Pentium D which is dual-core doesn't support hyper-threading. The program I made relies on an MPI library (it is not a benchmarking program). I think you are right, maibe I should run a benchmarking program first to see what happens. If you have a benchmarking program I would gladly test it. What is the best way to debug OpenMPI programs? Until now I ran prism which is part of the SunClusterTools.
Victor --- Jeff Pummill <jpum...@uark.edu> wrote: > Victor, > > Just on a hunch, look in your BIOS to see if > Hyperthreading is turned > on. If so, turn it off. We have seen some unusual > behavior on some of > our machines unless this is disabled. > > I am interested in your progress as I have just > begun working with > OpenMPI as well. I have used mpich for quite some > time, but felt > compelled to get some experience with OpenMPI as > well. I just installed > it this weekend on an AMD dual-core machine with 2 > gigs of ram. Maybe I > will try and replicate your experiment if you can > direct me to what > program you are benchmarking. > > Jeff F. Pummill > Senior Linux Cluster Administrator > University of Arkansas > Fayetteville, Arkansas 72701 > (479) 575 - 4590 > http://hpc.uark.edu > > victor marian wrote: > > The problem is that my executable file runs on the > > Pentium D in 80 seconds on two cores and in 25 > seconds > > on one core. > > And on another Sun SMP machine with 20 processors > it > > runs perfectly (the problem is perfectly > scallable). > > > > Victor Marian > > Laboratory of Machine Elements and Tribology > > University Politehnica of Bucharest > > Romania > > > > > > --- Brock Palen <bro...@umich.edu> wrote: > > > > > >> It means that your OMPI was compiled to support > >> uDAPL (a type of > >> infinibad network) but that your computer does > not > >> have such a card > >> installed. Because you dont it will fall back to > >> ethernet. But > >> because you are just running on a single machine. > > >> You will use the > >> fastest form of communication using shared > memory. > >> so you can ignore > >> that message. Unless in the future you add a > uDAPL > >> powered network > >> and you still get that message then you need to > >> worry. > >> > >> Brock Palen > >> Center for Advanced Computing > >> bro...@umich.edu > >> (734)936-1985 > >> > >> > >> On Jun 10, 2007, at 9:18 AM, victor marian wrote: > >> > >> > >>> Hello, > >>> > >>> I have a Pentium D computer with Solaris 10 > >>> > >> installed. > >> > >>> I installed OpenMPI, succesfully compiled my > >>> > >> Fortran > >> > >>> program, but when giving > >>> mpirun -np 2 progexe > >>> I receive > >>> [0,1,0]: uDAPL on host SERVSOLARIS was unable to > >>> > >> find > >> > >>> any NICs. > >>> Another transport will be used instead, although > >>> > >> this > >> > >>> may result in > >>> lower performance. > >>> > >>> I am a begginer in MPI and don't know what it > >>> > >> means. > >> > >>> What > >>> should I do to solve the problem? > >>> Thank you. > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > > > ______________________________________________________________________ > > > >>> ______________ > >>> Moody friends. Drama queens. Your life? Nope! - > >>> > >> their life, your > >> > >>> story. Play Sims Stories at Yahoo! Games. > >>> http://sims.yahoo.com/ > >>> _______________________________________________ > >>> 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 > >> > >> > > > > > > > > > > > ____________________________________________________________________________________ > > Moody friends. Drama queens. Your life? Nope! - > their life, your story. Play Sims Stories at Yahoo! > Games. > > http://sims.yahoo.com/ > > _______________________________________________ > > 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 ____________________________________________________________________________________ Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search http://search.yahoo.com/search?fr=oni_on_mail&p=graduation+gifts&cs=bz