我需要使用MPICH制作集群。在这种情况下,我首先在一台机器中尝试了这些示例(http://mpitutorial.com/beginner-mpi-tutorial/),这些示例按预期工作。然后我根据这个(https://help.ubuntu.com/community/MpichCluster)创建了集群,然后运行下面给出的示例,它可以工作。
#include <stdio.h>
#include <mpi.h>
int main(int argc, char** argv) {
int myrank, nprocs;
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
printf("Hello from processor %d of %d\n", myrank, nprocs);
MPI_Finalize();
return 0;
}
mpiexec -n 8 -f machinefile ./mpi_hello
接下来我运行了这个例子(http://mpitutorial.com/tutorials/mpi-reduce-and-allreduce/),但那时我收到了这个错误。不知道出了什么问题,哪里出错了?
Fatal error in MPI_Allreduce: A process has failed, error stack:
MPI_Allreduce(861)........: MPI_Allreduce(sbuf=0x7ffff0f55630, rbuf=0x7ffff0f55634, count=1, MPI_FLOAT, MPI_SUM, MPI_COMM_WORLD) failed
MPIR_Allreduce_impl(719)..:
MPIR_Allreduce_intra(362).:
dequeue_and_set_error(888): Communication error with rank 1
===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= EXIT CODE: 1
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
[proxy:0:1@ce-412] HYD_pmcd_pmip_control_cmd_cb (./pm/pmiserv/pmip_cb.c:886): assert (!closed) failed
[proxy:0:1@ce-412] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback returned error status
[proxy:0:1@ce-412] main (./pm/pmiserv/pmip.c:206): demux engine error waiting for event
[mpiexec@ce-411] HYDT_bscu_wait_for_completion (./tools/bootstrap/utils/bscu_wait.c:76): one of the processes terminated badly; aborting
[mpiexec@ce-411] HYDT_bsci_wait_for_completion (./tools/bootstrap/src/bsci_wait.c:23): launcher returned error waiting for completion
[mpiexec@ce-411] HYD_pmci_wait_for_completion (./pm/pmiserv/pmiserv_pmci.c:217): launcher returned error waiting for completion
[mpiexec@ce-411] main (./ui/mpich/mpiexec.c:331): process manager error waiting for completion
答案 0 :(得分:4)
是的,因为@Alexey提到这是一个确切的网络错误。以下是我所做的事情。
1)。导出主机文件为HYDRA_HOST_FILE以了解MPICH(更多信息:https://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager)
export HYDRA_HOST_FILE=<path_to_host_file>/hosts
2)。我必须解决这个问题(http://lists.mpich.org/pipermail/discuss/2013-January/000285.html)
-disable-hostname-propagation
最后这里是命令,它给出了我在集群节点之间的正确连接。
mpiexec -launcher fork -disable-hostname-propagation -f machinefile -np 4 ./Test