我正在尝试从每个处理器创建日志文件,然后将其作为字符数组发送到根节点。我首先发送长度,然后发送数据。长度可以正常发送,但是数据总是垃圾!以下是我的代码:
MPI_Barrier (MPI_COMM_WORLD);
string out = "";
MPI_Status status[2];
MPI_Request reqs[num_procs];
string log = "TEST";
int length = log.length();
char* temp = (char *) malloc(length+1);
strcpy(temp, log.c_str());
if (my_id != 0)
{
MPI_Send (&length, 1, MPI_INT, 0, 1, MPI_COMM_WORLD);
MPI_Send (&temp, length+1, MPI_CHAR, 0, 1, MPI_COMM_WORLD);
}
else {
int length;
for (int i = 1; i < num_procs; i++)
{
MPI_Recv (&length, 2, MPI_INT, i, 1, MPI_COMM_WORLD, &status[0]);
char* rec_buf;
rec_buf = (char *) malloc(length+1);
MPI_Recv (rec_buf, length+1, MPI_CHAR, i, 1, MPI_COMM_WORLD, &status[1]);
out += rec_buf;
free(rec_buf);
}
}
MPI_Barrier (MPI_COMM_WORLD);
free(temp);
MPI_Send (&length, 1, ...)
发送一个单词,但是在接收时却使用了MPI_Recv (&length, 2, ...)
接收两个单词? - Always Asking