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我正在從教程中閱讀和練習MPI程序。在那裏我看到了一個找到過程等級的例子。但是,同樣的例子,我的機器(Ubuntu的10.04)上根據教程給予不同的輸出.. 這裏是程序MPI意外輸出
#include <stdio.h>
#include <mpi.h>
main(int argc, char **argv)
{
int ierr, num_procs, my_id;
ierr = MPI_Init(&argc, &argv);
/* find out MY process ID, and how many processes were started. */
ierr = MPI_Comm_rank(MPI_COMM_WORLD, &my_id);
ierr = MPI_Comm_size(MPI_COMM_WORLD, &num_procs);
printf("Hello world! I'm process %i out of %i processes\n",
my_id, num_procs);
ierr = MPI_Finalize();
}
預期的輸出是
預期輸出:
Hello world! I'm process 0 out of 4 processes.
Hello world! I'm process 2 out of 4 processes.
Hello world! I'm process 1 out of 4 processes.
Hello world! I'm process 3 out of 4 processes.
我得到的輸出
Hello world! I'm process 0 out of 1 processes
Hello world! I'm process 0 out of 1 processes
Hello world! I'm process 0 out of 1 processes
Hello world! I'm process 0 out of 1 processes
我的媽媽中國採用英特爾i3,戴爾Inspiron和Ubuntu 10.04操作系統。幫助我解決問題。
什麼命令你使用運行你的應用程序? MPI應用程序通常使用'mpirun'或類似工具運行。 – 2013-02-26 17:27:57
[MPI \ _Rank可能爲所有進程返回相同的進程號](http://stackoverflow.com/questions/20287564/mpi-rank-return-same-process-number-for-all-process) – 2014-06-16 15:18:28