我有一个简单的MPI代码,它可以成功运行,但在终止之前它会显示以下错误。
===
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= EXIT CODE: 139
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
YOUR APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault (signal 11)
This typically refers to a problem with your application.
以下是我的源代码。
/*
AUTHOR ::: KHAYAM ANJAM
*/
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
int main (int argc, char *argv[])
{
int rank, size, ball_value, ball_present;
MPI_Init (&argc, &argv);
MPI_Comm_rank (MPI_COMM_WORLD, &rank);
MPI_Comm_size (MPI_COMM_WORLD, &size);
srandom(rank);
int delta = rand() % 13;
int random = rand() % 5;
if (random == 0) delta = -1*delta;
if (rank == 0) {
ball_present = 1;
ball_value = 0;
}
else ball_present = 0;
while (1) {
if(ball_present == 0)
MPI_Recv(&ball_value, 30, MPI_INT, MPI_ANY_SOURCE, 10, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
ball_present = 1;
printf("Task %d has Ball with value %d\n", rank, ball_value);
if (ball_value == 1000) break;
if (abs(ball_value) > 100) {
int send_1000 = 1000;
int i;
for (i = 0; i < size; i++)
if (i != rank) MPI_Send(&send_1000, 30, MPI_INT, i, 10, MPI_COMM_WORLD); //Broadcast to all others
break;
}
ball_value += delta;
int next_to_send = rand() % size;
if (next_to_send != rank) {
printf("Sending ball to %d\n", next_to_send);
MPI_Send(&ball_value, 30, MPI_INT, next_to_send, 10, MPI_COMM_WORLD);
ball_present = 0;
}
}
MPI_Finalize();
return 0;
}
答案 0 :(得分:3)
我对其余的代码不太确定(似乎没问题,但我看起来不太近),但可以肯定的是,你得到了他MPI_Recv()
/ MPI_Send()
对错了。问题是你发送和接收30个整数的数组,而你只为每个整数分配了内存。
尝试在3 30
或1
次来电中用MPI_Send()
替换MPI_Recv()
参数,您的代码可能会正常工作。