Source用来指定接收数据的来源进程,可以用MPI_ANY_SOURCE 来表示可以接收任意进程的数据。 Tag为消息标志,只有与发送操作的tag匹配才会进行通信,可以用MPI_ANY_TAG来表示可以接受任意tag的数据。 Status为通信结果,是一个数据类型结构,在C语言中,status结构包括MPI_SOURCE 、MPI_TAG和MPI_ERROR这三个域,分别表示接收...
rank-1,1,MPI_COMM_WORLD,status,ierr)print*,'Process',rank,' receive ',recvdata,' from Process',rank-1print*,'Process',rank,' receive ',recvdata,' from Process',status(MPI_SOURCE)endifcallMPI_FINALIZE(ierr)end programmain
;50MPI_Send(MPI_BOTTOM,0,MPI_INT,next,tag,MPI_COMM_WORLD);51MPI_Wait(&request, &status);52fprintf(stderr,"Process %d Receive Rsend message from %d\n",rank, status.MPI_SOURCE);53}54} 代码执行结果如下:
num = num_per_chunk;elsenum = num_last_chunk;// receive a chunk of the arrayMPI_Recv(&array[0], num,MPI_INT,0,0,MPI_COMM_WORLD, &status);// sort the received chunkquick_sort(array,0, num-1);// send back teh sorted chunkMPI_Send(&array[0], num,MPI_INT,0,0,MPI_COMM_WOR...
跟开头说的一样,所有代码会在GitHub上, 这节课的代码在tutorials/mpi-send-and-receive/code。 第一个例子的代码在send_recv.c. 我们来看一下主要的部分: // 得到当前进程的 rank 以及整个 communicator 的大小intworld_rank;MPI_Comm_rank(MPI_COMM_WORLD,&world_rank);intworld_size;MPI_Comm_size(MPI_...
// receive a chunk of the array MPI_Recv(&array[0], num, MPI_INT, 0, 0, MPI_COMM_WORLD, &status); // sort the received chunk quick_sort(array, 0, num-1); // send back teh sorted chunk MPI_Send(&array[0], num, MPI_INT, 0, 0, MPI_COMM_WORLD); ...
MPI是一个跨语言的通讯协议，用于编写并行计算机。支持点对点和广播。MPI是一个信息传递应用程序接口，包括...
ncclRecv does not support the equivalent of MPI_ANY_SOURCE; a specific source rank must always be provided. Similarly, the provided receive count must match the send count. Further, there is no concept of message tags. In-place operations¶ ...
Why it was not shown with my vitrual machine case even with 3rd Gen Xeon? 2. Why the performance down is shown with Intel MPI library? 3. Is there any way to make performance up with Intel MPI and 3rd Gen Xeon? Please help!. K. Kunita Translate...
Specifically, all MPI subroutines with no "choice" buffers are prototyped and will receive strong parameter type checking at run-time (e.g., MPI_INIT, MPI_COMM_RANK, etc.). Similar to the mpif.h interface, MPI_SIZEOF is only supported on Fortran compilers that support INTERFACE and ISO_...