int main(int argc,char*argv[]){ double local=0.0,pi,w,temp=0.0; int i,rank,size; w=1.0/N; MPI_Init(&argc,&argv); MPI_Comm_rank(MPI_COMM_WORLD,&rank);//rank为进程的编号 MPI_Comm_size(MPI_COMM_WORLD,&size);//size为进程的数量 for(i=rank;i<N;i+=size){ temp=(i+0.5)*w...
MPI_Gather(SendBuffer, row_num, MPI_INT, C, row_num, MPI_INT, 0, MPI_COMM_WORLD); local_end = MPI_Wtime(); local_elapse = local_end - local_start; MPI_Reduce(&local_elapse, &max_elapse, 1, MPI_DOUBLE, MPI_MAX, 0, MPI_COMM_WORLD); if (rank == 0) { printf("n= %d c...
{inti, j, k, myid, numprocs, anstag;intA[rows][cols], B[cols], C[rows];intmasterpro,buf[cols], ans,cnt;doublestarttime,endtime;doubletmp,totaltime; MPI_Status status; masterpro=0; MPI_Init(&argc, &argv); MPI_Comm_rank(MPI_COMM_WORLD,&myid); MPI_Comm_size(MPI_COMM_WORLD,&n...
{inti, j, k, myid, numprocs, anstag;intA[rows][cols], B[cols], C[rows];intmasterpro,buf[cols], ans,cnt;doublestarttime,endtime;doubletmp,totaltime; MPI_Status status; masterpro=0; MPI_Init(&argc, &argv); MPI_Comm_rank(MPI_COMM_WORLD,&myid); MPI_Comm_size(MPI_COMM_WORLD,&n...
MPI_Bcast(&n, 1, MPI_INT, 0, MPI_COMM_WORLD); for (i = rank + 1; i <= n; i += size) { x = (i - 0.5) / n; y = 4.0 / (1.0 + x * x); sum += y; } MPI_Reduce(∑, π, 1, MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD); ...
MPI_Reduce(&sum0, &sum, 1, MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD); /*打印最终结果及通信花费的墙钟时间*/ if(myid== 0) printf("n = %d, sum = %g, time = %g (s)\n", n, sum,MPI_Wtime()-t0); MPI_Finalize(); return0; } 1. 将mpisum.c改为打印出最大值和包含最大值...
doublepi, mypi, x, step, sum = 0.0; doublestart, end; MPI_Init(&argc, &argv); MPI_Comm_size(MPI_COMM_WORLD, &numprocs); MPI_Comm_rank(MPI_COMM_WORLD, &myid); if(myid == 0) { start = MPI_Wtime(); } MPI_Bcast(&num_steps, 1, MPI_INT, 0, MPI_COMM_WORLD); i_start ...
MPI_Send(c, 100, MPI_INT, 0, 0, MPI_COMM_WORLD); } MPI_Finalize(); return 0; } ``` 在这个示例中,我们使用 MPI 的 API 函数实现了矩阵乘法。首先,我们使用 MPI_Init 初始化 MPI 环境,然后使用 MPI_Comm_rank 和 MPI_Comm_size 获取当前进程的编号和进程总数。
生成多个二进制文件或具有多个参数集的同一个二进制文件,与它们建立通信并将其置于同一MPI_COMM_WORLD中。 语法 c++ intMPIAPIMPI_Comm_spawn_multiple(intcount, _In_count_(count)char*array_of_commands[], _In_opt_count_(count)char**array_of_argv[], _In_count_(count)intarray_of_maxprocs[], ...
已解决: I used mpirun to run the program and stopped when I got to MPI_Comm_create.The following write statement cannot be executed. what should I do?Is