+++ /dev/null
-/* Copyright (c) 2007-2017. 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"
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
-
-#define MAXMBOXLEN 64
-
-/** @addtogroup MSG_examples
- *
- * - <b>cloud/master_worker_vm.c: Master/workers
- * example on a cloud</b>. The classical example revisited to demonstrate the use of virtual machines.
- */
-
-const double task_comp_size = 10000000;
-const double task_comm_size = 10000000;
-
-static void send_tasks(int nb_workers)
-{
- for (int i = 0; i < nb_workers; i++) {
- char *tname = bprintf("Task%02d", i);
- char *mbox = bprintf("MBOX:WRK%02d", i);
-
- msg_task_t task = MSG_task_create(tname, task_comp_size, task_comm_size, NULL);
-
- XBT_INFO("Send task(%s) to mailbox(%s)", tname, mbox);
- MSG_task_send(task, mbox);
-
- free(tname);
- free(mbox);
- }
-}
-
-static int worker_fun(int argc, char *argv[])
-{
- const char *pr_name = MSG_process_get_name(MSG_process_self());
- char mbox[MAXMBOXLEN];
- snprintf(mbox, MAXMBOXLEN, "MBOX:%s", pr_name);
-
- XBT_INFO("%s is listening on mailbox(%s)", pr_name, mbox);
-
- for (;;) {
- msg_task_t task = NULL;
-
- msg_error_t res = MSG_task_receive(&task, mbox);
- xbt_assert(res == MSG_OK, "MSG_task_get failed");
-
- XBT_INFO("%s received task(%s) from mailbox(%s)", pr_name, MSG_task_get_name(task), mbox);
-
- if (strcmp(MSG_task_get_name(task), "finalize") == 0) {
- MSG_task_destroy(task);
- break;
- }
-
- MSG_task_execute(task);
- XBT_INFO("%s executed task(%s)", pr_name, MSG_task_get_name(task));
- MSG_task_destroy(task);
- }
- return 0;
-}
-
-static int master_fun(int argc, char *argv[])
-{
- msg_vm_t vm;
- unsigned int i;
-
- xbt_dynar_t worker_pms = MSG_process_get_data(MSG_process_self());
- int nb_workers = xbt_dynar_length(worker_pms);
-
- xbt_dynar_t vms = xbt_dynar_new(sizeof(msg_vm_t), NULL);
-
- /* Launch VMs and worker processes. One VM per PM, and one worker process per VM. */
- XBT_INFO("# Launch %d VMs", nb_workers);
- for (int i = 0; i< nb_workers; i++) {
- char *vm_name = bprintf("VM%02d", i);
- char *pr_name = bprintf("WRK%02d", i);
-
- msg_host_t pm = xbt_dynar_get_as(worker_pms, i, msg_host_t);
-
- XBT_INFO("create %s on PM(%s)", vm_name, MSG_host_get_name(pm));
- msg_vm_t vm = MSG_vm_create_core(pm, vm_name);
-
- s_vm_params_t params;
- memset(¶ms, 0, sizeof(params));
- params.ramsize = 1L * 1024 * 1024 * 1024; // 1Gbytes
- MSG_vm_set_params(vm, ¶ms);
-
- MSG_vm_start(vm);
- xbt_dynar_push(vms, &vm);
-
- XBT_INFO("put a process (%s) on %s", pr_name, vm_name);
- MSG_process_create(pr_name, worker_fun, NULL, vm);
-
- xbt_free(vm_name);
- xbt_free(pr_name);
- }
-
- /* Send a bunch of work to every one */
- XBT_INFO("# Send a task to %d worker process", nb_workers);
- send_tasks(nb_workers);
-
- XBT_INFO("# Suspend all VMs");
- xbt_dynar_foreach(vms, i, vm) {
- XBT_INFO("suspend %s", MSG_host_get_name(vm));
- MSG_vm_suspend(vm);
- }
-
- XBT_INFO("# Wait a while");
- MSG_process_sleep(2);
-
- XBT_INFO("# Resume all VMs");
- xbt_dynar_foreach(vms, i, vm) {
- MSG_vm_resume(vm);
- }
-
- XBT_INFO("# Sleep long enough for everyone to be done with previous batch of work");
- MSG_process_sleep(10 - MSG_get_clock());
-
- XBT_INFO("# Add one more process on each VM");
- xbt_dynar_foreach(vms, i, vm) {
- unsigned int index = i + xbt_dynar_length(vms);
- char *vm_name = bprintf("VM%02d", i);
- char *pr_name = bprintf("WRK%02d", index);
-
- XBT_INFO("put a process (%s) on %s", pr_name, vm_name);
- MSG_process_create(pr_name, worker_fun, NULL, vm);
-
- xbt_free(vm_name);
- xbt_free(pr_name);
- }
-
- XBT_INFO("# Send a task to %d worker process", nb_workers * 2);
- send_tasks(nb_workers * 2);
-
- msg_host_t worker_pm0 = xbt_dynar_get_as(worker_pms, 0, msg_host_t);
- msg_host_t worker_pm1 = xbt_dynar_get_as(worker_pms, 1, msg_host_t);
-
- XBT_INFO("# Migrate all VMs to PM(%s)", MSG_host_get_name(worker_pm0));
- xbt_dynar_foreach(vms, i, vm) {
- MSG_vm_migrate(vm, worker_pm0);
- }
-
- XBT_INFO("# Migrate all VMs to PM(%s)", MSG_host_get_name(worker_pm1));
- xbt_dynar_foreach(vms, i, vm) {
- MSG_vm_migrate(vm, worker_pm1);
- }
-
- XBT_INFO("# Shutdown the half of worker processes gracefully. The remaining half will be forcibly killed.");
- for (i = 0; i < nb_workers; i++) {
- char mbox[MAXMBOXLEN];
- snprintf(mbox, MAXMBOXLEN, "MBOX:WRK%02u", i);
- msg_task_t finalize = MSG_task_create("finalize", 0, 0, 0);
- MSG_task_send(finalize, mbox);
- }
-
- XBT_INFO("# Wait a while before effective shutdown.");
- MSG_process_sleep(2);
-
- XBT_INFO("# Shutdown and destroy all the VMs. The remaining worker processes will be forcibly killed.");
- xbt_dynar_foreach(vms, i, vm) {
- XBT_INFO("shutdown %s", MSG_host_get_name(vm));
- MSG_vm_shutdown(vm);
- XBT_INFO("destroy %s", MSG_host_get_name(vm));
- MSG_vm_destroy(vm);
- }
-
- XBT_INFO("# Goodbye now!");
- xbt_dynar_free(&vms);
- return 0;
-}
-
-/** Receiver function */
-int main(int argc, char *argv[])
-{
- const int nb_workers = 2;
-
- MSG_init(&argc, argv);
- xbt_assert(argc >1,"Usage: %s example/platforms/cluster.xml\n", argv[0]);
-
- /* Load the platform file */
- MSG_create_environment(argv[1]);
-
- /* Retrieve hosts from the platform file */
- xbt_dynar_t pms = MSG_hosts_as_dynar();
-
- /* we need a master node and worker nodes */
- xbt_assert(xbt_dynar_length(pms) > nb_workers,"need %d hosts", nb_workers + 1);
-
- /* the first pm is the master, the others are workers */
- msg_host_t master_pm = xbt_dynar_get_as(pms, 0, msg_host_t);
-
- xbt_dynar_t worker_pms = xbt_dynar_new(sizeof(msg_host_t), NULL);
- for (int i = 1; i < nb_workers + 1; i++) {
- msg_host_t pm = xbt_dynar_get_as(pms, i, msg_host_t);
- xbt_dynar_push(worker_pms, &pm);
- }
- xbt_dynar_free(&pms);
-
- /* Start the master process on the master pm. */
- MSG_process_create("master", master_fun, worker_pms, master_pm);
-
- msg_error_t res = MSG_main();
- XBT_INFO("Bye (simulation time %g)", MSG_get_clock());
-
- xbt_dynar_free(&worker_pms);
-
- return !(res == MSG_OK);
-}
