+++ /dev/null
-/* Copyright (c) 2007-2015. The SimGrid Team.
- * All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include "simgrid/msg.h"
-#include "simgrid/plugins/energy.h"
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
-
-/** @addtogroup MSG_examples
- *
- * - <b>parallel_task/parallel_task.c</b>: Demonstrates the use of @ref MSG_parallel_task_create, to create special
- * tasks that run on several hosts at the same time. The resulting simulations are very close to what can be
- * achieved in @ref SD_API, but still allows to use the other features of MSG (it'd be cool to be able to mix
- * interfaces, but it's not possible ATM).
- */
-
-static int runner(int argc, char *argv[])
-{
- /* Retrieve the list of all hosts as an array of hosts */
- xbt_dynar_t slaves_dynar = MSG_hosts_as_dynar();
- int slaves_count = xbt_dynar_length(slaves_dynar);
- msg_host_t *slaves = xbt_dynar_to_array(slaves_dynar);
-
- XBT_INFO("First, build a classical parallel task, with 1 Gflop to execute on each node, "
- "and 10MB to exchange between each pair");
- double *computation_amounts = xbt_new0(double, slaves_count);
- double *communication_amounts = xbt_new0(double, slaves_count * slaves_count);
-
- for (int i = 0; i < slaves_count; i++)
- computation_amounts[i] = 1e9; // 1 Gflop
-
- for (int i = 0; i < slaves_count; i++)
- for (int j = i + 1; j < slaves_count; j++)
- communication_amounts[i * slaves_count + j] = 1e7; // 10 MB
-
- msg_task_t ptask =
- MSG_parallel_task_create("parallel task", slaves_count, slaves, computation_amounts, communication_amounts, NULL);
- MSG_parallel_task_execute(ptask);
- MSG_task_destroy(ptask);
- /* The arrays communication_amounts and computation_amounts are not to be freed manually */
-
- XBT_INFO("Then, build a parallel task involving only computations and no communication (1 Gflop per node)");
- computation_amounts = xbt_new0(double, slaves_count);
- for (int i = 0; i < slaves_count; i++)
- computation_amounts[i] = 1e9; // 1 Gflop
- ptask =
- MSG_parallel_task_create("parallel exec", slaves_count, slaves, computation_amounts, NULL/* no comm */, NULL);
- MSG_parallel_task_execute(ptask);
- MSG_task_destroy(ptask);
-
- XBT_INFO("Finally, trick the ptask to do a 'remote execution', on host %s", MSG_host_get_name(slaves[1]));
- computation_amounts = xbt_new0(double, 1);
- computation_amounts[0] = 1e9; // 1 Gflop
- msg_host_t *remote = xbt_new(msg_host_t,1);
- remote[0] = slaves[1];
- ptask = MSG_parallel_task_create("remote exec", 1, remote, computation_amounts, NULL/* no comm */, NULL);
- MSG_parallel_task_execute(ptask);
- MSG_task_destroy(ptask);
- free(remote);
-
- XBT_INFO("Goodbye now!");
- free(slaves);
- return 0;
-}
-
-int main(int argc, char *argv[])
-{
- MSG_init(&argc, argv);
- MSG_config("host/model", "ptask_L07");
-
- xbt_assert(argc <= 3, "1Usage: %s <platform file> [--energy]", argv[0]);
- xbt_assert(argc >= 2, "2Usage: %s <platform file> [--energy]", argv[0]);
-
- if(argc == 3 && argv[2][2] == 'e')
- sg_energy_plugin_init();
-
- MSG_create_environment(argv[1]);
-
- /* Pick a process, no matter which, from the platform file */
- xbt_dynar_t all_hosts = MSG_hosts_as_dynar();
- msg_host_t first_host = xbt_dynar_getfirst_as(all_hosts,msg_host_t);
- xbt_dynar_free(&all_hosts);
-
- MSG_process_create("test", runner, NULL, first_host);
- msg_error_t res = MSG_main();
- XBT_INFO("Simulation done.");
-
- return res != MSG_OK;
-}
