openmpi

问题 In my code I have this multiplications in a C++ code with all variable types as double[] f1[0] = (f1_rot[0] * xu[0]) + (f1_rot[1] * yu[0]); f1[1] = (f1_rot[0] * xu[1]) + (f1_rot[1] * yu[1]); f1[2] = (f1_rot[0] * xu[2]) + (f1_rot[1] * yu[2]); f2[0] = (f2_rot[0] * xu[0]) + (f2_rot[1] * yu[0]); f2[1] = (f2_rot[0] * xu[1]) + (f2_rot[1] * yu[1]); f2[2] = (f2_rot[0] * xu[2]) + (f2_rot[1] * yu[2]); corresponding to these values Force Rot1 : -5.39155e-07, -3.66312e-07 Force Rot2 : 4.04383e-07, -1

问题 According to this post (https://github.com/mxcl/homebrew/pull/2953), the flag " --with-mpi " should enable boost_mpi build support for the related homebrew formula, so I am trying to install boost via homebrew like this: brew install boost --with-mpi However, the actual boost mpi library is not being build and can not be found. There is currently some work being done around this, according to: https://github.com/mxcl/homebrew/pull/15689 In summary, I can currently build boost, but it seems

问题 I have two machines. There are multiple Tesla cards on each machine. There is also an InfiniBand card on each machine. I want to communicate between GPU cards on different machines through InfiniBand. Just point to point unicast would be fine. I surely want to use GPUDirect RDMA so I could spare myself of extra copy operations. I am aware that there is a driver available now from Mellanox for its InfiniBand cards. But it doesn't offer a detailed development guide. Also I am aware that OpenMPI

问题 I am very new to MPI and I'm trying to use MPI_Reduce to find the maximum of an integer array. I have an integer array arr of size arraysize , and here is my code: MPI_Init(&argc, &argv); MPI_Comm_size(MPI_COMM_WORLD, &number_of_processes); MPI_Comm_rank(MPI_COMM_WORLD, &my_process_id); MPI_Bcast(arr, arraysize, MPI_INT, 0, MPI_COMM_WORLD); MPI_Reduce(arr, &result, arraysize, MPI_INT, MPI_MAX, 0, MPI_COMM_WORLD); if(!my_process_id){ printf("%d", result); } MPI_Finalize(); My program compiles

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'm trying to install openmpi but after different attempts I still can't use it. This is the last guide I followed. I simply copied and paste each command line. Here is what I obtained from my terminal when I run: mpirun timmy@timmy-Lenovo-G50-80 ~/openmpi-1.8.1 $ mpirun [timmy-Lenovo-G50-80:21817] *** Process received signal *** [timmy-Lenovo-G50-80:21817] Signal: Segmentation fault (11) [timmy-Lenovo-G50-80:21817] Signal code: Address not mapped (1) [timmy-Lenovo-G50-80:21817] Failing at

问题 I have something like: if (rank == winner) { ballPos[0] = rand() % 128; ballPos[1] = rand() % 64; cout << "new ball pos: " << ballPos[0] << " " << ballPos[1] << endl; MPI_Send(&ballPos, 2, MPI_INT, FIELD, NEW_BALL_POS_TAG, MPI_COMM_WORLD); } else if (rank == FIELD) { MPI_Recv(&ballPos, 2, MPI_INT, winner, NEW_BALL_POS_TAG, MPI_COMM_WORLD, MPI_STATUS_IGNORE); cout << "2 new ball pos: " << ballPos[0] << " " << ballPos[1] << endl; } But I see in console: new ball pos: 28 59 2 new ball pos: 28 59

问题 I have simple program, where I want to scatter structs across several computers, but it seems I have defined datatype incorrectly even though program compiles fine. I have following code. #include <mpi.h> #include <stdio.h> #include <stdlib.h> typedef struct small_pixel_s { double red; double green; double blue; } SMALL_PIXEL; int main(int argc, char **argv) { int size, rank; MPI_Init(&argc, &argv); MPI_Comm_size(MPI_COMM_WORLD, &size); MPI_Comm_rank(MPI_COMM_WORLD, &rank); SMALL_PIXEL global

问题 I am trying to run a simple MPI program(multiple array addition), it runs perfectly in my PC but simply hangs or shows the following error in the cluster. I am using open mpi and the following command to execute Netwok Config of the cluster(master&node1) MASTER eth0 Link encap:Ethernet HWaddr 00:22:19:A4:52:74 inet addr:10.1.1.1 Bcast:10.1.255.255 Mask:255.255.0.0 inet6 addr: fe80::222:19ff:fea4:5274/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16914 errors:0

问题 I am trying to run a simple MPI program on 4 nodes. I am using OpenMPI 1.4.3 running on Centos 5.5. When I submit the MPIRUN Command with the hostfile/machinefile, I get no output, receive a blank screen. Hence, I have to kill the job. . I use the following run command: : mpirun --hostfile hostfile -np 4 new46 OUTPUT ON KILLING JOB: mpirun: killing job... -------------------------------------------------------------------------- mpirun noticed that the job aborted, but has no info as to the