1 /* Copyright (c) 2010-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/msg.h"
9 #include <stdio.h> /* snprintf */
11 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
13 static int master(int argc, char *argv[])
15 xbt_assert(argc == 5);
16 long number_of_tasks = xbt_str_parse_int(argv[1], "Invalid amount of tasks: %s");
17 double task_comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s");
18 double task_comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s");
19 long slaves_count = xbt_str_parse_int(argv[4], "Invalid amount of slaves: %s");
21 XBT_INFO("Got %ld slaves and %ld tasks to process", slaves_count, number_of_tasks);
23 for (int i = 0; i < number_of_tasks; i++) {
25 char sprintf_buffer[256];
27 snprintf(mailbox,256, "slave-%ld", i % slaves_count);
28 snprintf(sprintf_buffer,256, "Task_%d", i);
29 msg_task_t task = MSG_task_create(sprintf_buffer, task_comp_size, task_comm_size, NULL);
30 if (number_of_tasks < 10000 || i % 10000 == 0)
31 XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", MSG_task_get_name(task), number_of_tasks, mailbox);
33 MSG_task_send(task, mailbox);
36 XBT_INFO("All tasks have been dispatched. Let's tell everybody the computation is over.");
37 for (int i = 0; i < slaves_count; i++) {
40 snprintf(mailbox,80, "slave-%ld", i % slaves_count);
41 msg_task_t finalize = MSG_task_create("finalize", 0, 0, 0);
42 MSG_task_send(finalize, mailbox);
48 static int master_mpi(int argc, char *argv[])
50 MPI_Init(&argc, &argv);
53 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
54 XBT_INFO("here for rank %d", rank);
55 int test[1000]={rank};
57 MPI_Send(&test, 1000, MPI_INT, 1, 1, MPI_COMM_WORLD);
59 MPI_Recv(&test, 1000, MPI_INT, 0, 1, MPI_COMM_WORLD, MPI_STATUSES_IGNORE);
61 XBT_INFO("After comm %d", rank);
64 XBT_INFO("After finalize %d %d", rank, test[0]);
68 static int alltoall_mpi(int argc, char *argv[])
70 MPI_Init(&argc, &argv);
74 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
75 MPI_Comm_size(MPI_COMM_WORLD, &size);
76 XBT_INFO("alltoall for rank %d", rank);
77 int* out=malloc(1000*size*sizeof(int));
78 int* in=malloc(1000*size*sizeof(int));
79 MPI_Alltoall(out, 1000, MPI_INT,in, 1000, MPI_INT, MPI_COMM_WORLD);
81 XBT_INFO("after alltoall %d", rank);
88 static int slave(int argc, char *argv[])
90 xbt_assert(argc == 2);
91 msg_task_t task = NULL;
92 XBT_ATTRIB_UNUSED int res;
95 XBT_ATTRIB_UNUSED int read;
97 read = sscanf(argv[1], "%d", &id);
98 xbt_assert(read, "Invalid argument %s\n", argv[1]);
100 snprintf(mailbox,80, "slave-%d", id);
103 res = MSG_task_receive(&(task), mailbox);
104 xbt_assert(res == MSG_OK, "MSG_task_get failed");
106 if (strcmp(MSG_task_get_name(task), "finalize")==0) {
107 MSG_task_destroy(task);
110 MSG_task_execute(task);
111 MSG_task_destroy(task);
114 XBT_INFO("I'm done. See you!");
119 int main(int argc, char *argv[])
123 MSG_init(&argc, argv);
126 xbt_assert(argc > 2,"Usage: %s platform_file deployment_file\n"
127 "\nexample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
129 MSG_create_environment(argv[1]);
131 MSG_function_register("master", master);
132 MSG_function_register("slave", slave);
133 // launch two MPI applications as well, one using master_mpi function as main on 2 nodes
134 SMPI_app_instance_register("master_mpi", master_mpi,2);
135 // the second performing an alltoall on 4 nodes
136 SMPI_app_instance_register("alltoall_mpi", alltoall_mpi,4);
137 MSG_launch_application(argv[2]);
141 XBT_INFO("Simulation time %g", MSG_get_clock());
144 return res != MSG_OK;