mpich

问题 I'm trying to execute parallel MPI program on several Windows machines (actually I have one Win7 and one WinXP machines, but people with other configurations (WinXP on all machines, for example) have the same problem). I use MPICH2 (1.4.1p1). I can execute program if I use wmpiexec (MPIEXEC wrapper - GUI for MPI) but if I try to execute it from console I catch next error: Command: mpiexec -hosts 2 locahost 2 192.168.0.102 2 <path to the program> Error: mpiexec running on <name of my machine>

问题 This code: #include <mpi.h> int main(int argc, char* argv[]) { MPI_Init(&argc, &argv); for (unsigned int iter = 0 ; iter < 1000 ; iter++) MPI_Barrier(MPI_COMM_WORLD); MPI_Finalize(); return 0; } is very long to run with MPICH 3.1.4 . Here are the wall clock (in seconds) for different MPI implementations. On a laptop with 4 processors of 2 cpu cores: | MPI size | MPICH 1.4.1p1 | openmpi 1.8.4 | MPICH 3.1.4 | |----------|---------------|---------------|-------------| | 2 | 0.01 | 0.39 | 0.01 |

问题 I am learning MPI. The first tutorial I followed is here The code that I run successfully on Windows 7 with MSVC 2010 is : #include "mpi.h" #include "iostream.h" int main(int argc,char *argv []) { int numtasks, rank, rc; rc = MPI_Init(&argc,&argv); if (rc != MPI_SUCCESS) { printf ("Error starting MPI program. Terminating.\n"); MPI_Abort(MPI_COMM_WORLD, rc); } MPI_Comm_size(MPI_COMM_WORLD,&numtasks); MPI_Comm_rank(MPI_COMM_WORLD,&rank); printf ("Number of tasks= %d My rank= %d\n", numtasks

问题 I'm studying about the new Process Manager that came automatically with MPICH2, but until now I can't figure out what's is big advance of this implementation, someone have knows a good tutorial or have some experience with? The argonne wiki is a kind of too simple: http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager 回答1: From the point of view of where I work, the biggest single advance is scalability of process launching. Launching 8000+ task jobs with the previous

问题 Greeting Everyone! I am a student and currently I got problem in setting Code Block. Can anyone help me or guide me how to configure Code Block so it can run MPI? I already install Code Block and MPICH2. But when I trying to compile the code, it does not work. Code block doesn't detect MPI. Anyone can show to me step by step to configure it. Really Appreciate it :) 回答1: I assume you are asking about Code::Blocks IDE. I think, you should modify your IDE and project settings and switch from

问题 I am trying to install mpich-3.1 in a linux cluster (Ubuntu 12.04 running on all machines). Previously I installed mpich2 by sudo apt-get install mpich2 but couldn't find how to run tests. Then I removed with sudo apt-get remove mpich2 . So I decided to upgrade to 3.1. I downloaded and installed mpich following instructions at https://www.mpich.org/static/downloads/3.1/mpich-3.1-installguide.pdf by running: sudo ./configure -prefix=/usr/local/mpich/ sudo make sudo make install and apparently

问题 When i run an "Open MPI" program, it generally assigns ranks in random order I want to know is there a way to always assign ranks in order? So instead of this Hello, World. I am 2 of 3 Hello, World. I am 0 of 3 Hello, World. I am 1 of 3 can i get this Hello, World. I am 0 of 3 Hello, World. I am 1 of 3 Hello, World. I am 2 of 3 EDIT here is the code PROGRAM hello INCLUDE 'mpif.h' INTEGER*4 :: numprocs, rank, ierr CALL MPI_INIT(ierr) CALL MPI_COMM_SIZE(MPI_COMM_WORLD, numprocs, ierr) CALL MPI

问题 I need to compile mpich for android , I used NDK arm-linux-andoirdeabi-4.8 toolchain to cross compile mpi , I did the following export PATH="$NDK_ROOT/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/:$PATH" export SYS_ROOT="$NDK_ROOT/platforms/android-8/arch-arm/" export CC="arm-linux-androideabi-gcc --sysroot=$SYS_ROOT" export LD="arm-linux-androideabi-ld" export AR="arm-linux-androideabi-ar" ./configure --host=arm-linux-androideabi --prefix=/Crosscompile2/jni/mpich/ LIBS="-lc

问题 I am trying to execute an MPI program in 2 different PCs. However, when I ran this command in pc1: mpirun -hosts user@host -n 4 bin/Demo_01.exe I'm getting this error: [proxy:0:0@pc2] HYDU_sock_connect (./utils/sock/sock.c:203): unable to connect from "pc2" to "pc1" (Connection refused) [proxy:0:0@pc2] main (./pm/pmiserv/pmip.c:209): unable to connect to server ubuntu at port 57395 (check for firewalls!) Although I configured SSH connections as without password and disabled firewalls on each

问题 Attempting to compile MPICH2 on a Windows machine using Cygwin. A bit of relevant information $ uname -> CYGWIN_NT-6.1 $ gcc --version -> gcc (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) Copyright (C) 2004 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. MPICH2 Version: 1.5 Configuration seems to have completed appropriately, but during compilation I