1 /* Copyright (c) 2013-2019. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 * (C) 2001 by Argonne National Laboratory.
9 * See COPYRIGHT in top-level directory.
16 /* This program tests MPI_Alltoallv by having processor i send different amounts of data to each processor.
18 TODO As there are separate send and receive types to alltoallv, there need to be tests to rearrange data on the fly.
19 The first test sends i items to processor i from all processors.
20 Currently, the test uses only MPI_INT; this is adequate for testing systems that use point-to-point operations
22 Example values for 3 processes:
23 * <0> sbuf: (#9): [0][1][2][3][4][5][6][7][8]
24 <0> scount: (#3): [0][1][2]
25 <0> rcount: (#3): [0][0][0]
26 <0> sdisp: (#3): [0][1][3]
27 <0> rdisp: (#3): [0][0][0]
29 <1> sbuf: (#9): [100][101][102][103][104][105][106][107][108]
30 <1> scount: (#3): [0][1][2]
31 <1> rcount: (#3): [1][1][1]
32 <1> sdisp: (#3): [0][1][3]
33 <1> rdisp: (#3): [0][1][2]
35 <2> sbuf: (#9): [200][201][202][203][204][205][206][207][208]
36 <2> scount: (#3): [0][1][2]
37 <2> rcount: (#3): [2][2][2]
38 <2> sdisp: (#3): [0][1][3]
39 <2> rdisp: (#3): [0][2][4]
41 after MPI_Alltoallvv :
42 <0> rbuf: (#9): [-1][-1][-1][-1][-1][-1][-1][-1][-1]
43 <1> rbuf: (#9): [1][101][201][-1][-1][-1][-1][-1][-1]
44 <2> rbuf: (#9): [3][4][103][104][203][204][-1][-1][-1]
47 static void print_buffer_int(const int* buf, int len, const char* msg, int rank)
49 printf("[%d] %s (#%d): ", rank, msg, len);
50 for (int tmp = 0; tmp < len; tmp++) {
51 printf("[%d]", buf[tmp]);
56 int main(int argc, char **argv)
63 MPI_Init(&argc, &argv);
65 comm = MPI_COMM_WORLD;
67 /* Create the buffer */
68 MPI_Comm_size(comm, &size);
70 printf("error : comm size <= 0, run with mpirun\n");
73 MPI_Comm_rank(comm, &rank);
74 int size2 = size * size;
75 xbt_assert(size2 > 0);
76 int* sbuf = (int*)xbt_malloc(size2 * sizeof(int));
77 int* rbuf = (int*)xbt_malloc(size2 * sizeof(int));
79 /* Load up the buffers */
80 for (i = 0; i < size2; i++) {
81 sbuf[i] = i + 100 * rank;
85 /* Create and load the arguments to alltoallv */
86 int* sendcounts = (int*)xbt_malloc(size * sizeof(int));
87 int* recvcounts = (int*)xbt_malloc(size * sizeof(int));
88 int* rdispls = (int*)xbt_malloc(size * sizeof(int));
89 int* sdispls = (int*)xbt_malloc(size * sizeof(int));
90 for (i = 0; i < size; i++) {
93 rdispls[i] = i * rank;
94 sdispls[i] = (i * (i + 1)) / 2;
98 status = MPI_Alltoallv(NULL, sendcounts, sdispls, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, MPI_COMM_WORLD);
99 if(status!=MPI_ERR_BUFFER)
100 printf("MPI_Alltoallv did not return MPI_ERR_BUFFER for empty sendbuf\n");
101 status = MPI_Alltoallv(sbuf, NULL, sdispls, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, MPI_COMM_WORLD);
102 if(status!=MPI_ERR_ARG)
103 printf("MPI_Alltoallv did not return MPI_ERR_ARG for NULL sendcounts\n");
104 status = MPI_Alltoallv(sbuf, sendcounts, NULL, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, MPI_COMM_WORLD);
105 if(status!=MPI_ERR_ARG)
106 printf("MPI_Alltoallv did not return MPI_ERR_ARG for NULL senddispl\n");
107 status = MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_DATATYPE_NULL, rbuf, recvcounts, rdispls, MPI_INT, MPI_COMM_WORLD);
108 if(status!=MPI_ERR_TYPE)
109 printf("MPI_Alltoallv did not return MPI_ERR_TYPE for MPI_DATATYPE_NULL sendtype\n");
110 status = MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, NULL, recvcounts, rdispls, MPI_INT, MPI_COMM_WORLD);
111 if(status!=MPI_ERR_BUFFER)
112 printf("MPI_Alltoallv did not return MPI_ERR_BUFFER for empty recvbuf\n");
113 status = MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, rbuf, NULL, rdispls, MPI_INT, MPI_COMM_WORLD);
114 if(status!=MPI_ERR_ARG)
115 printf("MPI_Alltoallv did not return MPI_ERR_ARG for NULL recvcounts\n");
116 status = MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, rbuf, recvcounts, NULL, MPI_INT, MPI_COMM_WORLD);
117 if(status!=MPI_ERR_ARG)
118 printf("MPI_Alltoallv did not return MPI_ERR_ARG for NULL recvdispl\n");
119 status = MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, rbuf, recvcounts, rdispls, MPI_DATATYPE_NULL, MPI_COMM_WORLD);
120 if(status!=MPI_ERR_TYPE)
121 printf("MPI_Alltoallv did not return MPI_ERR_TYPE for MPI_DATATYPE_NULL recvtype\n");
122 status = MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, MPI_COMM_NULL);
123 if(status!=MPI_ERR_COMM)
124 printf("MPI_Alltoallv did not return MPI_ERR_COMM for MPI_COMM_NULL comm\n");
126 print_buffer_int(sbuf, size2, "sbuf:", rank);
127 print_buffer_int(sendcounts, size, "scount:", rank);
128 print_buffer_int(recvcounts, size, "rcount:", rank);
129 print_buffer_int(sdispls, size, "sdisp:", rank);
130 print_buffer_int(rdispls, size, "rdisp:", rank);
132 MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, comm);
134 print_buffer_int(rbuf, size2, "rbuf:", rank);
136 MPI_Barrier(MPI_COMM_WORLD);
138 printf("Alltoallv TEST COMPLETE.\n");