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MHM,你好,大家都是在运行并行程序在室内用Linux的MPI和OpenMP的时候得到这些错误,MPI_Comm_size分段故障
[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).
-----------------------------------------------------------------------------
后,我分析的核心文件,我得到以下信息:
[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
这是什么原因造成的?感谢您的帮助
代码(TEST.CPP)如下,你可以试试:
#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();
}
你能告诉我们导致段错误的代码吗?您可能需要使用调试enablead编译您的程序,并在像mpirun -np 2 xterm -e gdb -ex run parallel_program'这样的调试器中运行它。 –
感谢您的帮助,我不知道哪个代码会导致这种情况,我认为它与MPI_Comm_size有关。对于源代码太长而无法向您显示,我感到抱歉。另外,代码可以在Windows中运行。在将run_environment更改为Linux之后,我使用makefile来编译我的代码,并且在运行“mpirun -np 8 parallel_program”时没有任何错误,它具有上述错误。 – kenan
向我们展示'main'函数的相关部分,包括初始化MPI的方式以及如何调用'MPI_Comm_size'。 –