X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d5006bee977eef019719db64b3dfd56aa485cb77..43307e6167f4be7aa7016e16df4e55f6f1973188:/src/simdag/sd_global.c diff --git a/src/simdag/sd_global.c b/src/simdag/sd_global.c index e3bf3189c5..f97eec443f 100644 --- a/src/simdag/sd_global.c +++ b/src/simdag/sd_global.c @@ -1,38 +1,149 @@ +/* Copyright (c) 2007-2009 Da 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 "private.h" #include "xbt/sysdep.h" #include "xbt/dynar.h" #include "surf/surf.h" +#include "xbt/ex.h" +#include "xbt/log.h" +#include "xbt/str.h" +#include "xbt/config.h" -XBT_LOG_NEW_CATEGORY(sd,"Logging specific to SimDag"); -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel,sd, - "Logging specific to SimDag (kernel)"); +XBT_LOG_NEW_CATEGORY(sd, "Logging specific to SimDag"); +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel, sd, + "Logging specific to SimDag (kernel)"); SD_global_t sd_global = NULL; -/* Initialises SD internal data. This function should be called before any other SD function. +XBT_LOG_EXTERNAL_CATEGORY(sd_kernel); +XBT_LOG_EXTERNAL_CATEGORY(sd_task); +XBT_LOG_EXTERNAL_CATEGORY(sd_workstation); + +/** + * \brief Initialises SD internal data + * + * This function must be called before any other SD function. Then you + * should call SD_create_environment(). + * + * \param argc argument number + * \param argv argument list + * \see SD_create_environment(), SD_exit() */ -void SD_init(int *argc, char **argv) { - xbt_assert0(sd_global == NULL, "SD_init already called"); +void SD_init(int *argc, char **argv) +{ + + s_SD_task_t task; + + xbt_assert0(!SD_INITIALISED(), "SD_init() already called"); + + /* Connect our log channels: that must be done manually under windows */ + XBT_LOG_CONNECT(sd_kernel, sd); + XBT_LOG_CONNECT(sd_task, sd); + XBT_LOG_CONNECT(sd_workstation, sd); + - sd_global = xbt_new0(s_SD_global_t, 1); + sd_global = xbt_new(s_SD_global_t, 1); sd_global->workstations = xbt_dict_new(); sd_global->workstation_count = 0; + sd_global->workstation_list = NULL; sd_global->links = xbt_dict_new(); + sd_global->link_count = 0; + sd_global->link_list = NULL; + sd_global->recyclable_route = NULL; sd_global->watch_point_reached = 0; - s_SD_task_t task; - sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup)); - sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup)); - sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup)); - sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup)); - sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->not_scheduled_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->scheduled_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->ready_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->in_fifo_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->running_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->done_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->failed_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->task_number = 0; surf_init(argc, argv); + xbt_cfg_set_string(_surf_cfg_set, "workstation_model", "ptask_L07"); } -/* Creates the environnement described in a xml file of a platform description. +/** + * \brief Reinits the application part of the simulation (experimental feature) + * + * This function allows you to run several simulations on the same platform + * by resetting the part describing the application. + * + * @warning: this function is still experimental and not perfect. For example, + * the simulation clock (and traces usage) is not reset. So, do not use it if + * you use traces in your simulation, and do not use absolute timing after using it. + * That being said, this function is still precious if you want to compare a bunch of + * heuristics on the same platforms. */ -void SD_create_environment(const char *platform_file) { +void SD_application_reinit(void) +{ + + s_SD_task_t task; + + if (SD_INITIALISED()) { + DEBUG0("Recreating the swags..."); + xbt_swag_free(sd_global->not_scheduled_task_set); + xbt_swag_free(sd_global->scheduled_task_set); + xbt_swag_free(sd_global->ready_task_set); + xbt_swag_free(sd_global->in_fifo_task_set); + xbt_swag_free(sd_global->running_task_set); + xbt_swag_free(sd_global->done_task_set); + xbt_swag_free(sd_global->failed_task_set); + + sd_global->not_scheduled_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->scheduled_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->ready_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->in_fifo_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->running_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->done_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->failed_task_set = + xbt_swag_new(xbt_swag_offset(task, state_hookup)); + sd_global->task_number = 0; + } else { + WARN0("SD_application_reinit called before initialization of SimDag"); + /* we cannot use exceptions here because xbt is not running! */ + } + +} + +/** + * \brief Creates the environment + * + * The environment (i.e. the \ref SD_workstation_management "workstations" and the + * \ref SD_link_management "links") is created with the data stored in the given XML + * platform file. + * + * \param platform_file name of an XML file describing the environment to create + * \see SD_workstation_management, SD_link_management + * + * The XML file follows this DTD: + * + * \include simgrid.dtd + * + * Here is a small example of such a platform: + * + * \include small_platform.xml + */ +void SD_create_environment(const char *platform_file) +{ xbt_dict_cursor_t cursor = NULL; char *name = NULL; void *surf_workstation = NULL; @@ -40,124 +151,205 @@ void SD_create_environment(const char *platform_file) { SD_CHECK_INIT_DONE(); - surf_timer_resource_init(platform_file); /* tell Surf to create the environnement */ - - - /*printf("surf_workstation_resource = %p, workstation_set = %p\n", surf_workstation_resource, workstation_set); - printf("surf_network_resource = %p, network_link_set = %p\n", surf_network_resource, network_link_set);*/ + DEBUG0("SD_create_environment"); - /*surf_workstation_resource_init_KCCFLN05(platform_file);*/ - surf_workstation_resource_init_CLM03(platform_file); - - /*printf("surf_workstation_resource = %p, workstation_set = %p\n", surf_workstation_resource, workstation_set); - printf("surf_network_resource = %p, network_link_set = %p\n", surf_network_resource, network_link_set);*/ + surf_config_models_setup(platform_file); + parse_platform_file(platform_file); /* now let's create the SD wrappers for workstations and links */ - xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) { + xbt_dict_foreach(surf_model_resource_set(surf_workstation_model), cursor, + name, surf_workstation) { __SD_workstation_create(surf_workstation, NULL); } - xbt_dict_foreach(network_link_set, cursor, name, surf_link) { + xbt_dict_foreach(surf_model_resource_set(surf_network_model), cursor, name, surf_link) { __SD_link_create(surf_link, NULL); } + + DEBUG2("Workstation number: %d, link number: %d", + SD_workstation_get_number(), SD_link_get_number()); } -/* Launches the simulation. Returns a NULL-terminated array of SD_task_t whose state has changed. +/** + * \brief Launches the simulation. + * + * The function will execute the \ref SD_READY ready tasks. + * The simulation will be stopped when its time reaches \a how_long, + * when a watch point is reached, or when no more task can be executed. + * Then you can call SD_simulate() again. + * + * \param how_long maximum duration of the simulation (a negative value means no time limit) + * \return a NULL-terminated array of \ref SD_task_t whose state has changed. + * \see SD_task_schedule(), SD_task_watch() */ -SD_task_t* SD_simulate(double how_long) +SD_task_t *SD_simulate(double how_long) { - /* TODO */ - - double total_time = 0.0; /* we stop the simulation when total_time >= how_long */ + double total_time = 0.0; /* we stop the simulation when total_time >= how_long */ double elapsed_time = 0.0; - SD_task_t task; + SD_task_t task, task_safe, dst; + SD_dependency_t dependency; surf_action_t action; - SD_task_t *changed_tasks = NULL; - int changed_task_number = 0; - int changed_task_capacity = 16; + SD_task_t *res = NULL; + xbt_dynar_t changed_tasks = xbt_dynar_new(sizeof(SD_task_t), NULL); + unsigned int iter; + static int first_time = 1; + + SD_CHECK_INIT_DONE(); - /* create the array that will be returned */ - changed_tasks = xbt_new0(SD_task_t, changed_task_capacity); /* changed_task_capacity will be increased if necessary */ - changed_tasks[0] = NULL; + INFO0("Starting simulation..."); - surf_solve(); /* Takes traces into account. Returns 0.0 */ + if (first_time) { + surf_presolve(); /* Takes traces into account */ + first_time = 0; + } + if (how_long > 0) { + surf_timer_model->extension.timer.set(surf_get_clock() + how_long, + NULL, NULL); + } sd_global->watch_point_reached = 0; + /* explore the ready tasks */ + xbt_swag_foreach_safe(task, task_safe, sd_global->ready_task_set) { + INFO1("Executing task '%s'", SD_task_get_name(task)); + if (__SD_task_try_to_run(task) && !xbt_dynar_member(changed_tasks, &task)) + xbt_dynar_push(changed_tasks, &task); + } + /* main loop */ - while (elapsed_time >= 0.0 && total_time < how_long && !sd_global->watch_point_reached) { - - /* explore the scheduled tasks */ - xbt_swag_foreach(task, sd_global->scheduled_task_set) { - INFO1("Examining task '%s'...", SD_task_get_name(task)); - task->state_changed = 0; - if (xbt_dynar_length(task->tasks_before) == 0) { - INFO1("The dependencies are satisfied. Executing task '%s'", SD_task_get_name(task)); - action = __SD_task_run(task); - surf_workstation_resource->common_public->action_set_data(action, task); - task->state_changed = 1; - - changed_tasks[changed_task_number++] = task; /* replace NULL by the task */ - if (changed_task_number == changed_task_capacity) { - changed_task_capacity *= 2; - changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity); - } - changed_tasks[changed_task_number] = NULL; - } - else { - INFO1("Cannot execute task '%s' now because some depencies are not satisfied.", SD_task_get_name(task)); - } - } + elapsed_time = 0.0; + while (elapsed_time >= 0.0 && + (how_long < 0.0 || total_time < how_long) && + !sd_global->watch_point_reached) { + surf_model_t model = NULL; + /* dumb variables */ + void *fun = NULL; + void *arg = NULL; + + + DEBUG1("Total time: %f", total_time); elapsed_time = surf_solve(); + DEBUG1("surf_solve() returns %f", elapsed_time); if (elapsed_time > 0.0) total_time += elapsed_time; - /* INFO1("Total time: %f", total_time);*/ - - while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) { - task = action->data; - INFO1("Task '%s' done", SD_task_get_name(task)); - __SD_task_set_state(task, SD_DONE); - __SD_task_remove_dependencies(task); - if (!task->state_changed) { - task->state_changed = 1; - changed_tasks[changed_task_number++] = task; + + /* let's see which tasks are done */ + xbt_dynar_foreach(model_list, iter, model) { + while ((action = xbt_swag_extract(model->states.done_action_set))) { + task = action->data; + INFO1("Task '%s' done", SD_task_get_name(task)); + DEBUG0("Calling __SD_task_just_done"); + __SD_task_just_done(task); + DEBUG1("__SD_task_just_done called on task '%s'", + SD_task_get_name(task)); + + /* the state has changed */ + if (!xbt_dynar_member(changed_tasks, &task)) + xbt_dynar_push(changed_tasks, &task); + + /* remove the dependencies after this task */ + while (xbt_dynar_length(task->tasks_after) > 0) { + xbt_dynar_get_cpy(task->tasks_after, 0, &dependency); + dst = dependency->dst; + SD_task_dependency_remove(task, dst); + + /* is dst ready now? */ + if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) { + INFO1("Executing task '%s'", SD_task_get_name(dst)); + if (__SD_task_try_to_run(dst) && + !xbt_dynar_member(changed_tasks, &task)) + xbt_dynar_push(changed_tasks, &task); + } + } } - } - while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) { - task = action->data; - INFO1("Task '%s' failed", SD_task_get_name(task)); - __SD_task_set_state(task, SD_FAILED); - if (!task->state_changed) { - task->state_changed = 1; - changed_tasks[changed_task_number++] = task; + /* let's see which tasks have just failed */ + while ((action = xbt_swag_extract(model->states.failed_action_set))) { + task = action->data; + INFO1("Task '%s' failed", SD_task_get_name(task)); + __SD_task_set_state(task, SD_FAILED); + surf_workstation_model->action_unref(action); + task->surf_action = NULL; + + if (!xbt_dynar_member(changed_tasks, &task)) + xbt_dynar_push(changed_tasks, &task); } } + + while (surf_timer_model->extension.timer.get(&fun, (void *) &arg)) { + } } + res = xbt_new0(SD_task_t, (xbt_dynar_length(changed_tasks) + 1)); + + xbt_dynar_foreach(changed_tasks, iter, task) { + res[iter] = task; + } + xbt_dynar_free(&changed_tasks); + INFO0("Simulation finished"); + DEBUG3("elapsed_time = %f, total_time = %f, watch_point_reached = %d", + elapsed_time, total_time, sd_global->watch_point_reached); + DEBUG1("current time = %f", surf_get_clock()); + + return res; +} + +/** + * \brief Returns the current clock + * + * \return the current clock, in second + */ +double SD_get_clock(void) +{ + SD_CHECK_INIT_DONE(); - INFO1("Number of tasks whose state has changed: %d", changed_task_number); - return changed_tasks; + return surf_get_clock(); } -/* Destroys all SD internal data. This function should be called when the simulation is over. - * The tasks should have been destroyed first. +/** + * \brief Destroys all SD internal data + * + * This function should be called when the simulation is over. Don't forget also to destroy + * the tasks. + * + * \see SD_init(), SD_task_destroy() */ -void SD_exit(void) { - if (sd_global != NULL) { +void SD_exit(void) +{ + if (SD_INITIALISED()) { + DEBUG0("Destroying workstation and link dictionaries..."); xbt_dict_free(&sd_global->workstations); xbt_dict_free(&sd_global->links); - xbt_free(sd_global); + DEBUG0("Destroying workstation and link arrays if necessary..."); + if (sd_global->workstation_list != NULL) + xbt_free(sd_global->workstation_list); + + if (sd_global->link_list != NULL) + xbt_free(sd_global->link_list); + + if (sd_global->recyclable_route != NULL) + xbt_free(sd_global->recyclable_route); + + DEBUG0("Destroying the swags..."); xbt_swag_free(sd_global->not_scheduled_task_set); xbt_swag_free(sd_global->scheduled_task_set); + xbt_swag_free(sd_global->ready_task_set); + xbt_swag_free(sd_global->in_fifo_task_set); xbt_swag_free(sd_global->running_task_set); xbt_swag_free(sd_global->done_task_set); xbt_swag_free(sd_global->failed_task_set); + xbt_free(sd_global); + sd_global = NULL; + + DEBUG0("Exiting Surf..."); surf_exit(); + } else { + WARN0("SD_exit() called, but SimDag is not running"); + /* we cannot use exceptions here because xbt is not running! */ } }