+++ /dev/null
-/* Copyright (c) 2009-2019. 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. */
-
-/* simple test to schedule a DAX file with the Min-Min algorithm. */
-#include "simgrid/simdag.h"
-#include <math.h>
-#include <string.h>
-
-#if SIMGRID_HAVE_JEDULE
-#include "simgrid/jedule/jedule_sd_binding.h"
-#endif
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(test, "Logging specific to this SimDag example");
-
-typedef struct _HostAttribute *HostAttribute;
-struct _HostAttribute {
- /* Earliest time at which a host is ready to execute a task */
- double available_at;
- SD_task_t last_scheduled_task;
-};
-
-static double sg_host_get_available_at(sg_host_t host)
-{
- HostAttribute attr = (HostAttribute) sg_host_user(host);
- return attr->available_at;
-}
-
-static void sg_host_set_available_at(sg_host_t host, double time)
-{
- HostAttribute attr = (HostAttribute) sg_host_user(host);
- attr->available_at = time;
- sg_host_user_set(host, attr);
-}
-
-static SD_task_t sg_host_get_last_scheduled_task( sg_host_t host){
- HostAttribute attr = (HostAttribute) sg_host_user(host);
- return attr->last_scheduled_task;
-}
-
-static void sg_host_set_last_scheduled_task(sg_host_t host, SD_task_t task){
- HostAttribute attr = (HostAttribute) sg_host_user(host);
- attr->last_scheduled_task=task;
- sg_host_user_set(host, attr);
-}
-
-static xbt_dynar_t get_ready_tasks(xbt_dynar_t dax)
-{
- unsigned int i;
- xbt_dynar_t ready_tasks;
- SD_task_t task;
-
- ready_tasks = xbt_dynar_new(sizeof(SD_task_t), NULL);
- xbt_dynar_foreach(dax, i, task) {
- if (SD_task_get_kind(task) == SD_TASK_COMP_SEQ && SD_task_get_state(task) == SD_SCHEDULABLE) {
- xbt_dynar_push(ready_tasks, &task);
- }
- }
- XBT_DEBUG("There are %lu ready tasks", xbt_dynar_length(ready_tasks));
-
- return ready_tasks;
-}
-
-static double finish_on_at(SD_task_t task, sg_host_t host)
-{
- double result;
-
- xbt_dynar_t parents = SD_task_get_parents(task);
-
- if (!xbt_dynar_is_empty(parents)) {
- unsigned int i;
- double data_available = 0.;
- double redist_time = 0;
- double last_data_available;
- /* compute last_data_available */
- SD_task_t parent;
- last_data_available = -1.0;
- xbt_dynar_foreach(parents, i, parent) {
- /* normal case */
- if (SD_task_get_kind(parent) == SD_TASK_COMM_E2E) {
- sg_host_t * parent_host= SD_task_get_workstation_list(parent);
- /* Estimate the redistribution time from this parent */
- if (SD_task_get_amount(parent) <= 1e-6){
- redist_time= 0;
- } else {
- redist_time = sg_host_route_latency(parent_host[0], host) +
- SD_task_get_amount(parent) / sg_host_route_bandwidth(parent_host[0], host);
- }
- data_available = SD_task_get_start_time(parent) + redist_time;
- }
-
- /* no transfer, control dependency */
- if (SD_task_get_kind(parent) == SD_TASK_COMP_SEQ) {
- data_available = SD_task_get_finish_time(parent);
- }
-
- if (last_data_available < data_available)
- last_data_available = data_available;
- }
-
- xbt_dynar_free_container(&parents);
-
- result = fmax(sg_host_get_available_at(host), last_data_available) + SD_task_get_amount(task) / sg_host_speed(host);
- } else {
- xbt_dynar_free_container(&parents);
-
- result = sg_host_get_available_at(host) + SD_task_get_amount(task)/sg_host_speed(host);
- }
- return result;
-}
-
-static sg_host_t SD_task_get_best_host(SD_task_t task)
-{
- sg_host_t *hosts = sg_host_list();
- int nhosts = sg_host_count();
- sg_host_t best_host = hosts[0];
- double min_EFT = finish_on_at(task, hosts[0]);
-
- for (int i = 1; i < nhosts; i++) {
- double EFT = finish_on_at(task, hosts[i]);
- XBT_DEBUG("%s finishes on %s at %f", SD_task_get_name(task), sg_host_get_name(hosts[i]), EFT);
-
- if (EFT < min_EFT) {
- min_EFT = EFT;
- best_host = hosts[i];
- }
- }
- xbt_free(hosts);
- return best_host;
-}
-
-int main(int argc, char **argv)
-{
- unsigned int cursor;
- double min_finish_time = -1.0;
- SD_task_t task;
- SD_task_t selected_task = NULL;
- xbt_dynar_t ready_tasks;
- sg_host_t selected_host = NULL;
- char * tracefilename = NULL;
-
- /* initialization of SD */
- SD_init(&argc, argv);
-
- /* Check our arguments */
- xbt_assert(argc > 2, "Usage: %s platform_file dax_file [jedule_file]\n"
- "\tExample: %s simulacrum_7_hosts.xml Montage_25.xml Montage_25.jed", argv[0], argv[0]);
-
- if (argc == 4)
- tracefilename = xbt_strdup(argv[3]);
-
- /* creation of the environment */
- SD_create_environment(argv[1]);
-
- /* Allocating the host attribute */
- int total_nhosts = sg_host_count();
- sg_host_t *hosts = sg_host_list();
-
- for (cursor = 0; cursor < total_nhosts; cursor++)
- sg_host_user_set(hosts[cursor], xbt_new0(struct _HostAttribute, 1));
-
- /* load the DAX file */
- xbt_dynar_t dax = SD_daxload(argv[2]);
-
- xbt_dynar_foreach(dax, cursor, task) {
- SD_task_watch(task, SD_DONE);
- }
-
- /* Schedule the root first */
- xbt_dynar_get_cpy(dax, 0, &task);
- sg_host_t host = SD_task_get_best_host(task);
- SD_task_schedulel(task, 1, host);
- xbt_dynar_t changed_tasks = xbt_dynar_new(sizeof(SD_task_t), NULL);
- SD_simulate_with_update(-1.0, changed_tasks);
-
- while (!xbt_dynar_is_empty(changed_tasks)) {
- /* Get the set of ready tasks */
- ready_tasks = get_ready_tasks(dax);
- xbt_dynar_reset(changed_tasks);
-
- if (xbt_dynar_is_empty(ready_tasks)) {
- xbt_dynar_free_container(&ready_tasks);
- /* there is no ready task, let advance the simulation */
- SD_simulate_with_update(-1.0, changed_tasks);
- continue;
- }
- /* For each ready task:
- * get the host that minimizes the completion time.
- * select the task that has the minimum completion time on its best host.
- */
- xbt_dynar_foreach(ready_tasks, cursor, task) {
- XBT_DEBUG("%s is ready", SD_task_get_name(task));
- host = SD_task_get_best_host(task);
- double finish_time = finish_on_at(task, host);
- if (min_finish_time < 0 || finish_time < min_finish_time) {
- min_finish_time = finish_time;
- selected_task = task;
- selected_host = host;
- }
- }
-
- XBT_INFO("Schedule %s on %s", SD_task_get_name(selected_task), sg_host_get_name(selected_host));
- SD_task_schedulel(selected_task, 1, selected_host);
-
- /*
- * SimDag allows tasks to be executed concurrently when they can by default.
- * Yet schedulers take decisions assuming that tasks wait for resource availability to start.
- * The solution (well crude hack is to keep track of the last task scheduled on a host and add a special type of
- * dependency if needed to force the sequential execution meant by the scheduler.
- * If the last scheduled task is already done, has failed or is a predecessor of the current task, no need for a
- * new dependency
- */
-
- SD_task_t last_scheduled_task = sg_host_get_last_scheduled_task(selected_host);
- if (last_scheduled_task && (SD_task_get_state(last_scheduled_task) != SD_DONE) &&
- (SD_task_get_state(last_scheduled_task) != SD_FAILED) &&
- !SD_task_dependency_exists(sg_host_get_last_scheduled_task(selected_host), selected_task))
- SD_task_dependency_add(last_scheduled_task, selected_task);
-
- sg_host_set_last_scheduled_task(selected_host, selected_task);
- sg_host_set_available_at(selected_host, min_finish_time);
-
- xbt_dynar_free_container(&ready_tasks);
- /* reset the min_finish_time for the next set of ready tasks */
- min_finish_time = -1.;
- xbt_dynar_reset(changed_tasks);
- SD_simulate_with_update(-1.0, changed_tasks);
- }
-
- XBT_INFO("Simulation Time: %f", SD_get_clock());
- XBT_INFO("------------------- Produce the trace file---------------------------");
- XBT_INFO("Producing a jedule output (if active) of the run into %s", tracefilename?tracefilename:"minmin_test.jed");
-#if SIMGRID_HAVE_JEDULE
- jedule_sd_dump(tracefilename);
-#endif
- free(tracefilename);
-
- xbt_dynar_free_container(&ready_tasks);
- xbt_dynar_free(&changed_tasks);
-
- xbt_dynar_foreach(dax, cursor, task) {
- SD_task_destroy(task);
- }
- xbt_dynar_free_container(&dax);
-
- for (cursor = 0; cursor < total_nhosts; cursor++) {
- free(sg_host_user(hosts[cursor]));
- sg_host_user_set(hosts[cursor], NULL);
- }
-
- xbt_free(hosts);
- return 0;
-}
