+/* 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 "simdag/simdag.h"
#include "xbt/sysdep.h"
/* general information */
task->data = data; /* user data */
- if (name != NULL)
- task->name = xbt_strdup(name);
- else
- task->name = NULL;
-
+ task->name = xbt_strdup(name);
+ task->kind = 0;
task->state_hookup.prev = NULL;
task->state_hookup.next = NULL;
task->state_set = sd_global->not_scheduled_task_set;
return task->name;
}
+/** @brief Returns the dynar of the parents of a task
+ *
+ * \param task a task
+ * \return a newly allocated dynar comprising the parents of this task
+ */
+
+xbt_dynar_t SD_task_get_parents(SD_task_t task)
+{
+ unsigned int i;
+ xbt_dynar_t parents;
+ SD_dependency_t dep;
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ parents = xbt_dynar_new(sizeof(SD_task_t), NULL);
+ xbt_dynar_foreach(task->tasks_before, i, dep){
+ xbt_dynar_push(parents, &(dep->src));
+ }
+ return parents;
+}
+
+/** @brief Returns the dynar of the parents of a task
+ *
+ * \param task a task
+ * \return a newly allocated dynar comprising the parents of this task
+ */
+xbt_dynar_t SD_task_get_children(SD_task_t task)
+{
+ unsigned int i;
+ xbt_dynar_t children;
+ SD_dependency_t dep;
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ children = xbt_dynar_new(sizeof(SD_task_t), NULL);
+ xbt_dynar_foreach(task->tasks_after, i, dep){
+ xbt_dynar_push(children, &(dep->dst));
+ }
+ return children;
+}
+
+/**
+ * \brief Returns the amount of workstations involved in a task
+ *
+ * Only call this on already scheduled tasks!
+ * \param task a task
+ */
+int SD_task_get_workstation_count(SD_task_t task)
+{
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ // xbt_assert1( task->state_set != sd_global->scheduled_task_set,
+ // "Unscheduled task %s", task->name);
+ return task->workstation_nb;
+}
+
+/**
+ * \brief Returns the list of workstations involved in a task
+ *
+ * Only call this on already scheduled tasks!
+ * \param task a task
+ */
+SD_workstation_t* SD_task_get_workstation_list(SD_task_t task)
+{
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ //xbt_assert1( task->state_set != sd_global->scheduled_task_set,
+ // "Unscheduled task %s", task->name);
+ return task->workstation_list;
+}
+
/**
- * \brief Returns the total amount of a task
+ * \brief Returns the total amount of work contained in a task
*
* \param task a task
- * \return the total amount of this task
+ * \return the total amount of work (computation or data transfer) for this task
* \see SD_task_get_remaining_amount()
*/
double SD_task_get_amount(SD_task_t task)
}
/**
- * \brief Returns the remaining amount of a task
+ * \brief Returns the remaining amount work to do till the completion of a task
*
* \param task a task
- * \return the remaining amount of this task
+ * \return the remaining amount of work (computation or data transfer) of this task
* \see SD_task_get_amount()
*/
double SD_task_get_remaining_amount(SD_task_t task)
xbt_assert0(task != NULL, "Invalid parameter");
if (task->surf_action)
- return task->surf_action->remains;
+ return surf_workstation_model->get_remains(task->surf_action);
else
return task->remains;
}
-/* temporary function for debbuging */
-static void __SD_print_dependencies(SD_task_t task)
+int SD_task_get_kind(SD_task_t task) {
+ return task->kind;
+}
+
+/** @brief Displays debugging informations about a task */
+void SD_task_dump(SD_task_t task)
{
- xbt_dynar_t dynar;
- int length;
- int i;
+ unsigned int counter;
SD_dependency_t dependency;
-
- INFO1("The following tasks must be executed before %s:",
- SD_task_get_name(task));
- dynar = task->tasks_before;
- length = xbt_dynar_length(dynar);
-
-
- for (i = 0; i < length; i++) {
- xbt_dynar_get_cpy(dynar, i, &dependency);
- INFO1(" %s", SD_task_get_name(dependency->src));
+ char *statename;
+
+ INFO1("Displaying task %s",SD_task_get_name(task));
+ statename=bprintf("%s %s %s %s %s %s %s",
+ (task->state&SD_NOT_SCHEDULED?"not scheduled":""),
+ (task->state&SD_SCHEDULED?"scheduled":""),
+ (task->state&SD_READY?"ready":"not ready"),
+ (task->state&SD_IN_FIFO?"in fifo":""),
+ (task->state&SD_RUNNING?"running":""),
+ (task->state&SD_DONE?"done":""),
+ (task->state&SD_FAILED?"failed":""));
+ INFO1(" - state: %s",statename);
+ free(statename);
+
+ if (task->kind!=0) {
+ switch(task->kind){
+ case SD_TASK_COMM_E2E:
+ INFO0(" - kind: end-to-end communication");
+ break;
+ case SD_TASK_COMP_SEQ:
+ INFO0(" - kind: sequential computation");
+ break;
+ default:
+ INFO1(" - (unknown kind %d)",task->kind);
+ }
}
-
- INFO1("The following tasks must be executed after %s:",
- SD_task_get_name(task));
-
- dynar = task->tasks_after;
- length = xbt_dynar_length(dynar);
- for (i = 0; i < length; i++) {
- xbt_dynar_get_cpy(dynar, i, &dependency);
- INFO1(" %s", SD_task_get_name(dependency->dst));
+ INFO1(" - amount: %.0f",SD_task_get_amount(task));
+ if (xbt_dynar_length(task->tasks_before)) {
+ INFO0(" - pre-dependencies:");
+ xbt_dynar_foreach(task->tasks_before,counter,dependency) {
+ INFO1(" %s",SD_task_get_name(dependency->src));
+ }
+ }
+ if (xbt_dynar_length(task->tasks_after)) {
+ INFO0(" - post-dependencies:");
+ xbt_dynar_foreach(task->tasks_after,counter,dependency) {
+ INFO1(" %s",SD_task_get_name(dependency->dst));
+ }
+ }
+}
+/** @brief Dumps the task in dotty formalism into the FILE* passed as second argument */
+void SD_task_dotty(SD_task_t task,void* out) {
+ unsigned int counter;
+ SD_dependency_t dependency;
+ fprintf(out, " T%p [label=\"%.20s\"",task, task->name);
+ switch(task->kind){
+ case SD_TASK_COMM_E2E:
+ fprintf(out,", shape=box");
+ break;
+ case SD_TASK_COMP_SEQ:
+ fprintf(out,", shape=circle");
+ break;
+ default:
+ xbt_die("Unknown task type!");
+ }
+ fprintf(out,"];\n");
+ xbt_dynar_foreach(task->tasks_before,counter,dependency) {
+ fprintf(out," T%p -> T%p;\n",dependency->src, dependency->dst);
}
- INFO0("----------------------------");
}
/* Destroys a dependency between two tasks.
dynar = src->tasks_after;
length = xbt_dynar_length(dynar);
-
-
if (src == dst)
THROW1(arg_error, 0,
"Cannot add a dependency between task '%s' and itself",
dependency = xbt_new(s_SD_dependency_t, 1);
- if (name != NULL)
- dependency->name = xbt_strdup(name);
- else
- dependency->name = NULL;
-
+ dependency->name = xbt_strdup(name); /* xbt_strdup is cleaver enough to deal with NULL args itself */
dependency->data = data;
dependency->src = src;
dependency->dst = dst;
*
* \param src a task
* \param dst a task depending on \a src
+ *
+ * If src is NULL, checks whether dst has any pre-dependency.
+ * If dst is NULL, checks whether src has any post-dependency.
*/
int SD_task_dependency_exists(SD_task_t src, SD_task_t dst)
{
- xbt_dynar_t dynar;
- int length;
- int i;
+ unsigned int counter;
SD_dependency_t dependency;
SD_CHECK_INIT_DONE();
- xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
+ xbt_assert0(src != NULL || dst != NULL, "Invalid parameter: both src and dst are NULL");
- dynar = src->tasks_after;
- length = xbt_dynar_length(dynar);
-
- for (i = 0; i < length; i++) {
- xbt_dynar_get_cpy(dynar, i, &dependency);
- if (dependency->dst == dst)
- return 1;
+ if (src) {
+ if (dst) {
+ xbt_dynar_foreach(src->tasks_after,counter,dependency) {
+ if (dependency->dst == dst)
+ return 1;
+ }
+ } else {
+ return xbt_dynar_length(src->tasks_after);
+ }
+ } else {
+ return xbt_dynar_length(dst->tasks_before);
}
return 0;
}
* \param workstation_list the workstations on which the task would be executed
* \param computation_amount computation amount for each workstation
* \param communication_amount communication amount between each pair of workstations
- * \param rate task execution speed rate
* \see SD_schedule()
*/
double SD_task_get_execution_time(SD_task_t task,
int workstation_nb,
const SD_workstation_t * workstation_list,
const double *computation_amount,
- const double *communication_amount,
- double rate)
+ const double *communication_amount)
{
double time, max_time = 0.0;
int i, j;
max_time = time;
}
}
- return max_time * SD_task_get_amount(task);
+ return max_time;
+}
+static inline void SD_task_do_schedule(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+
+ if (!__SD_task_is_not_scheduled(task))
+ THROW1(arg_error, 0, "Task '%s' has already been scheduled",
+ SD_task_get_name(task));
+
+ /* update the task state */
+ if (xbt_dynar_length(task->tasks_before) == 0)
+ __SD_task_set_state(task, SD_READY);
+ else
+ __SD_task_set_state(task, SD_SCHEDULED);
}
/**
* \param rate task execution speed rate
* \see SD_task_unschedule()
*/
-void SD_task_schedule(SD_task_t task, int workstation_nb,
+void SD_task_schedule(SD_task_t task, int workstation_count,
const SD_workstation_t * workstation_list,
const double *computation_amount,
const double *communication_amount, double rate)
{
+ xbt_assert0(workstation_count > 0, "workstation_nb must be positive");
int communication_nb;
- SD_CHECK_INIT_DONE();
- xbt_assert0(task != NULL, "Invalid parameter");
- xbt_assert0(workstation_nb > 0, "workstation_nb must be positive");
-
- if (!__SD_task_is_not_scheduled(task))
- THROW1(arg_error, 0, "Task '%s' has already been scheduled",
- SD_task_get_name(task));
-
- task->workstation_nb = workstation_nb;
+ task->workstation_nb = workstation_count;
task->rate = rate;
- task->computation_amount = xbt_new(double, workstation_nb);
+ task->computation_amount = xbt_new(double, workstation_count);
memcpy(task->computation_amount, computation_amount,
- sizeof(double) * workstation_nb);
+ sizeof(double) * workstation_count);
- communication_nb = workstation_nb * workstation_nb;
+ communication_nb = workstation_count * workstation_count;
task->communication_amount = xbt_new(double, communication_nb);
memcpy(task->communication_amount, communication_amount,
sizeof(double) * communication_nb);
- task->workstation_list = xbt_new(SD_workstation_t, workstation_nb);
+ task->workstation_list = xbt_new(SD_workstation_t, workstation_count);
memcpy(task->workstation_list, workstation_list,
- sizeof(SD_workstation_t) * workstation_nb);
+ sizeof(SD_workstation_t) * workstation_count);
- /* update the task state */
- if (xbt_dynar_length(task->tasks_before) == 0)
- __SD_task_set_state(task, SD_READY);
- else
- __SD_task_set_state(task, SD_SCHEDULED);
+ SD_task_do_schedule(task);
}
-
/**
* \brief Unschedules a task
*
xbt_free(task->computation_amount);
xbt_free(task->communication_amount);
+ task->computation_amount = task->communication_amount = NULL;
}
/* Runs a task. This function is directly called by __SD_task_try_to_run if the task
task->surf_action = NULL;
if ((task->workstation_nb == 1) && (task->communication_amount[0] == 0.0)) {
task->surf_action =
- surf_workstation_model->extension.workstation.
- execute(surf_workstations[0], task->computation_amount[0]);
+ surf_workstation_model->extension.
+ workstation.execute(surf_workstations[0], task->computation_amount[0]);
} else if ((task->workstation_nb == 1)
&& (task->computation_amount[0] == 0.0)) {
task->surf_action =
- surf_workstation_model->extension.workstation.
- communicate(surf_workstations[0], surf_workstations[0],
- task->communication_amount[0], task->rate);
+ surf_workstation_model->extension.
+ workstation.communicate(surf_workstations[0], surf_workstations[0],
+ task->communication_amount[0], task->rate);
} else if ((task->workstation_nb == 2)
&& (task->computation_amount[0] == 0.0)
&& (task->computation_amount[1] == 0.0)) {
}
if (nb == 1) {
task->surf_action =
- surf_workstation_model->extension.workstation.
- communicate(surf_workstations[0], surf_workstations[1], value,
- task->rate);
+ surf_workstation_model->extension.
+ workstation.communicate(surf_workstations[0], surf_workstations[1],
+ value, task->rate);
}
}
if (!task->surf_action) {
sizeof(double) * task->workstation_nb * task->workstation_nb);
task->surf_action =
- surf_workstation_model->extension.workstation.
- execute_parallel_task(task->workstation_nb, surf_workstations,
- computation_amount, communication_amount,
- task->amount, task->rate);
+ surf_workstation_model->extension.
+ workstation.execute_parallel_task(task->workstation_nb,
+ surf_workstations, computation_amount,
+ communication_amount, task->amount,
+ task->rate);
} else {
xbt_free(surf_workstations);
}
DEBUG1("Destroying task %s...", SD_task_get_name(task));
__SD_task_remove_dependencies(task);
-
/* if the task was scheduled or ready we have to free the scheduling parameters */
if (__SD_task_is_scheduled_or_ready(task))
__SD_task_destroy_scheduling_data(task);
+ xbt_swag_remove(task,task->state_set);
if (task->name != NULL)
xbt_free(task->name);
if (task->workstation_list != NULL)
xbt_free(task->workstation_list);
+ if (task->communication_amount)
+ xbt_free(task->communication_amount);
+
+ if (task->computation_amount)
+ xbt_free(task->computation_amount);
+
xbt_dynar_free(&task->tasks_before);
xbt_dynar_free(&task->tasks_after);
xbt_free(task);
DEBUG0("Task destroyed.");
}
+
+
+static inline SD_task_t SD_task_create_sized(const char*name,void*data,double amount,int ws_count) {
+ SD_task_t task = SD_task_create(name,data,amount);
+ task->communication_amount = xbt_new0(double,ws_count*ws_count);
+ task->computation_amount = xbt_new0(double,ws_count);
+ task->workstation_nb = ws_count;
+ task->workstation_list = xbt_new0(SD_workstation_t,ws_count);
+ return task;
+}
+/** @brief create a end-to-end communication task that can then be auto-scheduled
+ *
+ * Auto-scheduling mean that the task can be used with SD_task_schedulev(). This
+ * allows to specify the task costs at creation, and decorelate them from the
+ * scheduling process where you just specify which resource should deliver the
+ * mandatory power.
+ *
+ * A end-to-end communication must be scheduled on 2 hosts, and the amount
+ * specified at creation is sent from hosts[0] to hosts[1].
+ */
+SD_task_t SD_task_create_comm_e2e(const char*name, void *data, double amount) {
+ SD_task_t res = SD_task_create_sized(name,data,amount,2);
+ res->communication_amount[2] = amount;
+ res->kind=SD_TASK_COMM_E2E;
+ return res;
+}
+/** @brief create a sequential computation task that can then be auto-scheduled
+ *
+ * Auto-scheduling mean that the task can be used with SD_task_schedulev(). This
+ * allows to specify the task costs at creation, and decorelate them from the
+ * scheduling process where you just specify which resource should deliver the
+ * mandatory power.
+ *
+ * A sequential computation must be scheduled on 1 host, and the amount
+ * specified at creation to be run on hosts[0].
+ */
+SD_task_t SD_task_create_comp_seq(const char*name, void *data, double amount) {
+ SD_task_t res = SD_task_create_sized(name,data,amount,1);
+ res->computation_amount[0]=amount;
+ res->kind=SD_TASK_COMP_SEQ;
+ return res;
+}
+
+/** @brief Auto-schedules a task.
+ *
+ * Auto-scheduling mean that the task can be used with SD_task_schedulev(). This
+ * allows to specify the task costs at creation, and decorelate them from the
+ * scheduling process where you just specify which resource should deliver the
+ * mandatory power.
+ *
+ * To be auto-schedulable, a task must be created with SD_task_create_comm_e2e() or
+ * SD_task_create_comp_seq(). Check their definitions for the exact semantic of each
+ * of them.
+ *
+ * @todo
+ * We should create tasks kind for the following categories:
+ * - Point to point communication (done)
+ * - Sequential computation (done)
+ * - group communication (redistribution, several kinds)
+ * - parallel tasks with no internal communication (one kind per speedup model such as amdal)
+ * - idem+ internal communication. Task type not enough since we cannot store comm cost alongside to comp one)
+ */
+void SD_task_schedulev(SD_task_t task, int count, const SD_workstation_t*list) {
+ int i;
+ xbt_assert1(task->kind != 0,"Task %s is not typed. Cannot automatically schedule it.",SD_task_get_name(task));
+ switch(task->kind) {
+ case SD_TASK_COMM_E2E:
+ case SD_TASK_COMP_SEQ:
+ xbt_assert(task->workstation_nb==count);
+ for (i=0;i<count;i++)
+ task->workstation_list[i]=list[i];
+ SD_task_do_schedule(task);
+ break;
+ default:
+ xbt_die(bprintf("Kind of task %s not supported by SD_task_schedulev()",
+ SD_task_get_name(task)));
+ }
+ if (task->kind == SD_TASK_COMM_E2E) {
+ VERB4("Schedule comm task %s between %s -> %s. It costs %.f bytes",
+ SD_task_get_name(task),
+ SD_workstation_get_name(task->workstation_list[0]),SD_workstation_get_name(task->workstation_list[1]),
+ task->communication_amount[2]);
+
+ }
+ /* Iterate over all childs and parent being COMM_E2E to say where I am located (and start them if ready) */
+ if (task->kind == SD_TASK_COMP_SEQ) {
+ VERB3("Schedule computation task %s on %s. It costs %.f flops",
+ SD_task_get_name(task),SD_workstation_get_name(task->workstation_list[0]),
+ task->computation_amount[0]);
+ SD_dependency_t dep;
+ unsigned int cpt;
+ xbt_dynar_foreach(task->tasks_before,cpt,dep) {
+ SD_task_t before = dep->src;
+ if (before->kind == SD_TASK_COMM_E2E) {
+ before->workstation_list[1] = task->workstation_list[0];
+ if (before->workstation_list[0] && __SD_task_is_not_scheduled(before)) {
+ SD_task_do_schedule(before);
+ VERB4("Auto-Schedule comm task %s between %s -> %s. It costs %.f bytes",
+ SD_task_get_name(before),
+ SD_workstation_get_name(before->workstation_list[0]),SD_workstation_get_name(before->workstation_list[1]),
+ before->communication_amount[2]);
+ }
+ }
+ }
+ xbt_dynar_foreach(task->tasks_after,cpt,dep) {
+ SD_task_t after = dep->dst;
+ if (after->kind == SD_TASK_COMM_E2E) {
+ after->workstation_list[0] = task->workstation_list[0];
+ if (after->workstation_list[1] && __SD_task_is_not_scheduled(after)) {
+ SD_task_do_schedule(after);
+ VERB4("Auto-Schedule comm task %s between %s -> %s. It costs %.f bytes",
+ SD_task_get_name(after),
+ SD_workstation_get_name(after->workstation_list[0]),SD_workstation_get_name(after->workstation_list[1]),
+ after->communication_amount[2]);
+
+ }
+ }
+ }
+ }
+}
+/** @brief autoschedule a task on a list of workstations
+ *
+ * This function is very similar to SD_task_schedulev(),
+ * but takes the list of workstations to schedule onto as separate parameters.
+ * It builds a proper vector of workstations and then call SD_task_schedulev()
+ */
+void SD_task_schedulel(SD_task_t task, int count, ...) {
+ va_list ap;
+ SD_workstation_t *list=xbt_new(SD_workstation_t,count);
+ int i;
+ va_start(ap,count);
+ for (i=0;i<count;i++) {
+ list[i] = va_arg(ap,SD_workstation_t);
+ }
+ va_end(ap);
+ SD_task_schedulev(task,count,list);
+ free(list);
+}
