Forgive me, but I have no idea what that output means. Why do you think only 3 processors are being used?
On Dec 9, 2013, at 5:05 AM, ???? <781578...@qq.com> wrote: > I have a server with 12 cores.when I run mpi program with 10 > processors.only three processors works.Here are a picture about the problem > > <40f6d...@e690af16.27c0a552.jpg> > > why?Is the problem with process schedule?? > ------------------ ???????? ------------------ > ??????: "Bruno Coutinho";<couti...@dcc.ufmg.br>; > ????????: 2013??12??6??(??????) ????11:14 > ??????: "Open MPI Users"<us...@open-mpi.org>; > ????: Re: [OMPI users]?????? can you help me please ?thanks > > Probably it was the changing from eager to rendezvous protocols as Jeff said. > > If you don't know what are these, read this: > https://computing.llnl.gov/tutorials/mpi_performance/#Protocols > http://blogs.cisco.com/performance/what-is-an-mpi-eager-limit/ > http://blogs.cisco.com/performance/eager-limits-part-2/ > > You can tune eager limit chaning mca parameters btl_tcp_eager_limit (for > tcp), btl_self_eager_limit (comunication fron one process to itself), > btl_sm_eager_limit (shared memory) and btl_udapl_eager_limit or > btl_openib_eager_limit (if you use infiniband). > > > 2013/12/6 Jeff Squyres (jsquyres) <jsquy...@cisco.com> > I sent you some further questions yesterday: > > http://www.open-mpi.org/community/lists/users/2013/12/23158.php > > > On Dec 6, 2013, at 1:35 AM, ???? <781578...@qq.com> wrote: > > > Here is my code: > > int*a=(int*)malloc(sizeof(int)*number); > > MPI_Send(a,number, MPI_INT, 1, 1,MPI_COMM_WORLD); > > > > int*b=(int*)malloc(sizeof(int)*number); > > MPI_Recv(b, number, MPI_INT, 0, MPI_ANY_TAG, MPI_COMM_WORLD, &status); > > > > number here is the size of my array(eg,a or b). > > I have try it on my local compute and my rocks cluster.On rocks cluster, > > one processor on one frontend node use "MPI_Send" send a message ,other > > processors on compute nodes use "MPI_Recv" receive message . > > when number is least than 10000,other processors can receive message fast; > > but when number is more than 15000,other processors can receive message > > slowly > > why?? becesue openmpi API ?? or other problems? > > > > it spends me a few days , I want your help,thanks for all readers. good > > luck for you > > > > > > > > > > ------------------ ???????? ------------------ > > ??????: "Ralph Castain";<r...@open-mpi.org>; > > ????????: 2013??12??5??(??????) ????6:52 > > ??????: "Open MPI Users"<us...@open-mpi.org>; > > ????: Re: [OMPI users] can you help me please ?thanks > > > > You are running 15000 ranks on two nodes?? My best guess is that you are > > swapping like crazy as your memory footprint problem exceeds available > > physical memory. > > > > > > > > On Thu, Dec 5, 2013 at 1:04 AM, ???? <781578...@qq.com> wrote: > > My ROCKS cluster includes one frontend and two compute nodes.In my > > program,I have use the openmpi API such as MPI_Send and MPI_Recv . but > > when I run the progam with 3 processors . one processor send a message > > ,other receive message .here are some code. > > int*a=(int*)malloc(sizeof(int)*number); > > MPI_Send(a,number, MPI_INT, 1, 1,MPI_COMM_WORLD); > > > > int*b=(int*)malloc(sizeof(int)*number); > > MPI_Recv(b, number, MPI_INT, 0, MPI_ANY_TAG, MPI_COMM_WORLD, &status); > > > > when number is least than 10000,it runs fast. > > but number is more than 15000,it runs slowly > > > > why?? becesue openmpi API ?? or other problems? > > ------------------ ???????? ------------------ > > ??????: "Ralph Castain";<r...@open-mpi.org>; > > ????????: 2013??12??3??(??????) ????1:39 > > ??????: "Open MPI Users"<us...@open-mpi.org>; > > ????: Re: [OMPI users] can you help me please ?thanks > > > > > > > > > > > > On Mon, Dec 2, 2013 at 9:23 PM, ???? <781578...@qq.com> wrote: > > A simple program at my 4-node ROCKS cluster runs fine with command: > > /opt/openmpi/bin/mpirun -np 4 -machinefile machines ./sort_mpi6 > > > > > > Another bigger programs runs fine on the head node only with command: > > > > cd ./sphere; /opt/openmpi/bin/mpirun -np 4 ../bin/sort_mpi6 > > > > But with the command: > > > > cd /sphere; /opt/openmpi/bin/mpirun -np 4 -machinefile ../machines > > ../bin/sort_mpi6 > > > > It gives output that: > > > > ../bin/sort_mpi6: error while loading shared libraries: libgdal.so.1: > > cannot open > > shared object file: No such file or directory > > ../bin/sort_mpi6: error while loading shared libraries: libgdal.so.1: > > cannot open > > shared object file: No such file or directory > > ../bin/sort_mpi6: error while loading shared libraries: libgdal.so.1: > > cannot open > > shared object file: No such file or directory > > > > > > > > _______________________________________________ > > 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 > > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > 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
