I agree with Gilles -- when you compile with one MPI implementation, but then accidentally use the mpirun/mpiexec from a different MPI implementation to launch it, it's quite a common symptom to see an MPI_COMM_WORLD size of 1 (i.e., each MPI process is rank 0 in MPI_COMM_WORLD).
Make sure that you're using the mpifort and mpirun from the same MPI implementation (e.g., Open MPI). You might want to re-build HPL from scratch and ensure that you are using a specific mpifort, and then be absolutely 100% sure to re-run the resulting HPL with the mpirun from that same MPI implementation. > On May 26, 2015, at 9:38 PM, Heerdt, Lanze M. <heerdt...@gcc.edu> wrote: > > I have run a hello world program for any number of processes. If I say “–n > 16” I get 4 responses from each node saying “Hello world! I am process (0-15) > of response. > > > > As a response to the illegal entry in HPL.dat, that doesn’t really make much > sense since I run it just fine with p =1 and q =1, it only says that when I > changeand q to 2, which I know is not an illegal entry > > > > From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Gilles > Gouaillardet > Sent: Tuesday, May 26, 2015 8:14 PM > To: Open MPI Users > Subject: Re: [OMPI users] Running HPL on RPi cluster, seems like MPI is > somehow not configured properly since it work with 1 node but not more > > > > At first glance, it seems all mpi tasks believe they are rank zero and comm > world size is 1 (!) > > Did you compile xhpl with OpenMPI (and not a stub library for serial version > only) ? > can you make sure there is nothing wrong with your LD_LIBRARY_PATH and you do > not mix MPI librairies > (e.g. OpenMPI mpirun but xhpl ends up using mpich, or the other way around) > > As already suggested by Ralph, i would start by running a hello world program > (just print rank and size to confirm it works) > > Cheers, > > Gilles > > > On 5/27/2015 8:42 AM, Ralph Castain wrote: > > I don't know enough about HPL to resolve the problem. However, I would > suggest that you first just try to run the example programs in the examples > directory to ensure you have everything working. If they work, then the > problem is clearly in the HPL arena. > > > > I do note that your image reports that you have an illegal entry in HPL.dat - > if the examples work, you might start there. > > > > > > On Tue, May 26, 2015 at 12:26 PM, Heerdt, Lanze M. <heerdt...@gcc.edu> wrote: > > I realize this may be a bit off topic, but since what I am doing seems to be > a pretty commonly done thing I am hoping to find someone who has done it > before/can help since I’ve been at my wits end for so long they are calling > me Mr. Whittaker. > > > > I am trying to run HPL on a Raspberry Pi cluster. I used the following guides > to get to where I am now: > > http://www.tinkernut.com/2014/04/make-cluster-computer/ > > http://www.tinkernut.com/2014/05/make-cluster-computer-part-2/ > > https://www.howtoforge.com/tutorial/hpl-high-performance-linpack-benchmark-raspberry-pi/#comments > > and a bit of: > https://www.raspberrypi.org/forums/viewtopic.php?p=301458#p301458 when the > above guide wasn’t working > > > > basically when I run: “mpiexec -machinefile ~/machinefile -n 1 xhpl” it works > just fine > > but when I run “mpiexec -machinefile ~/machinefile -n 4 xhpl” it errors with > the attached image. (if I use “mpirun…” I get the exact same behavior) > > [Note: I HAVE changed the HPL.dat to have “2 Ps” and “2 Qs” from 1 and > 1 for when I try to run it with 4 processes] > > > > This is for a project of mine which I need done by the end of the week so if > you see this after 5/29 thank you but don’t bother responding > > > > I have hpl-2.1, mpi4py-1.3.1, mpich-3.1, and openmpi-1.8.5 at my disposal > > In the machinefile are the 4 IP addresses of my 4 RPi nodes > > 10.15.106.107 > > 10.15.101.29 > > 10.15.106.108 > > 10.15.101.30 > > > > Any other information you need I can easily get to you so please do not > hesitate to ask. I have nothing else to do but try and get this to work :P > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/05/26945.php > > > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/05/26948.php > > > <Zoop.PNG>_______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/05/26950.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
