嗯,大家好。我在Linux中使用MPI和OpenMP运行并行程序时遇到这些错误,
[node65:03788] *** Process received signal ***
[node65:03788] Signal: Segmentation fault (11)
[node65:03788] Signal code: Address not mapped (1)
[node65:03788] Failing at address: 0x44000098
[node65:03788] [ 0] /lib64/libpthread.so.0 [0x2b663e446c00]
[node65:03788] [ 1] /public/share/mpi/openmpi- 1.4.5//lib/libmpi.so.0(MPI_Comm_size+0x60) [0x2b663d694360]
[node65:03788] [ 2] fdtd_3D_xyzPML_MPI_OpenMP(main+0xaa) [0x42479a]
[node65:03788] [ 3] /lib64/libc.so.6(__libc_start_main+0xf4) [0x2b663e56f184]
[node65:03788] [ 4] fdtd_3D_xyzPML_MPI_OpenMP(_ZNSt8ios_base4InitD1Ev+0x39) [0x405d79]
[node65:03788] *** End of error message ***
-----------------------------------------------------------------------------
mpirun noticed that process rank 2 with PID 3787 on node node65 exited on signal 11 (Segmentation fault).
-----------------------------------------------------------------------------
在分析核心文件后,我收到以下消息:
[Thread debugging using libthread_db enabled]
[New Thread 47310344057648 (LWP 26962)]
[New Thread 1075841344 (LWP 26966)]
[New Thread 1077942592 (LWP 26967)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47310344057648 (LWP 26962)]
0x00002b074afb3360 in PMPI_Comm_size () from /public/share/mpi/openmpi-1.4.5//lib/libmpi.so.0
是什么原因引起的?谢谢你的帮助
代码(test.cpp)如下,您可以尝试:
#include <stdio.h>
#include <stdlib.h>
#include <omp.h>
#include "mpi.h"
int main(int argc, char* argv[])
{
int nprocs = 1; //the number of processes
int myrank = 0;
int provide;
MPI_Init_thread(&argc,&argv,MPI_THREAD_FUNNELED,&provide);
if (MPI_THREAD_FUNNELED != provide)
{
printf ("%d != required %d", MPI_THREAD_FUNNELED, provide);
return 0;
}
MPI_Comm_size(MPI_COMM_WORLD,&nprocs);
MPI_Comm_rank(MPI_COMM_WORLD,&myrank);
int num_threads = 1; //Openmp
omp_set_dynamic(1);
num_threads = 16;
omp_set_num_threads(num_threads);
#pragma omp parallel
{
printf ("%d omp thread from %d mpi process\n", omp_get_thread_num(), myrank);
}
MPI_Finalize();
}
答案 0 :(得分:1)
嗯,这可能不是很多,甚至有点蹩脚的答案,但在混合不同的MPI安装(确切地说是OpenMPI和MVAPICH2)时遇到了这个问题。
以下是一些要检查的内容
ldd <application> | grep -i mpi
libmpi.so.1 => /usr/lib64/mpi/gcc/openmpi/lib64/libmpi.so.1 (0x00007f90c03cc000)
echo $LD_LIBRARY_PATH | tr : "\n" | grep -i mpi
/usr/lib64/mpi/gcc/openmpi/lib64
echo $LD_PRELOAD
如果一切正常,您需要检查链接到的每个库以及依赖于MPI的每个库是否也链接到相同的版本。如果没有其他库链接到MPI,则不应出现任何内容。
ldd <application> | sed "s/^\s*\(.*=> \)\?//;s/ (0x[0-9a-fA-F]*)$//" | xargs -L 1 ldd | grep -i mpi
如果某个嫌疑人确实出现了,例如说libmpich.so.3 => /usr/lib64/mpi/gcc/MVAPICH2/1.8.1/lib/libmpich.so.3
,你应该删除-L 1并将grep替换为可视化的东西(没有?或less
或vim -
。 ..),然后搜索那条可疑线。