-/* $Id$ */
+/* $Id$ */
-/* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */
+/* Copyright (c) 2002-2007 Arnaud Legrand. */
+/* Copyright (c) 2007 Bruno Donassolo. */
+/* 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/error.h"
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(task, msg,
- "Logging specific to MSG (task)");
-
-static char sprint_buffer[64];
+#include "msg/private.h"
+#include "xbt/sysdep.h"
+#include "xbt/log.h"
/** \defgroup m_task_management Managing functions of Tasks
* \brief This section describes the task structure of MSG
* (#m_task_t) and the functions for managing it.
- *
+ */
+/** @addtogroup m_task_management
+ * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Tasks" --> \endhtmlonly
+ *
* Since most scheduling algorithms rely on a concept of task
* that can be either <em>computed</em> locally or
* <em>transferred</em> on another processor, it seems to be the
corresponding object.
* \param name a name for the object. It is for user-level information
and can be NULL.
- * \param compute_duration a value of the processing amount (in Mflop)
+ * \param compute_duration a value of the processing amount (in flop)
needed to process this new task. If 0, then it cannot be executed with
MSG_task_execute(). This value has to be >=0.
- * \param message_size a value of the amount of data (in Mb) needed to
+ * \param message_size a value of the amount of data (in bytes) needed to
transfer this new task. If 0, then it cannot be transfered with
MSG_task_get() and MSG_task_put(). This value has to be >=0.
* \param data a pointer to any data may want to attach to the new
* \return The new corresponding object.
*/
m_task_t MSG_task_create(const char *name, double compute_duration,
- double message_size, void *data)
+ double message_size, void *data)
{
- simdata_task_t simdata = xbt_new0(s_simdata_task_t,1);
- m_task_t task = xbt_new0(s_m_task_t,1);
-
+ m_task_t task = xbt_new(s_m_task_t, 1);
+ simdata_task_t simdata = xbt_new(s_simdata_task_t, 1);
+ task->simdata = simdata;
/* Task structure */
task->name = xbt_strdup(name);
- task->simdata = simdata;
task->data = data;
/* Simulator Data */
- simdata->sleeping = xbt_dynar_new(sizeof(m_process_t),NULL);
simdata->computation_amount = compute_duration;
simdata->message_size = message_size;
simdata->rate = -1.0;
- simdata->using = 1;
+ simdata->priority = 1.0;
+ simdata->refcount = 1;
simdata->sender = NULL;
-
+ simdata->receiver = NULL;
+ simdata->cond = SIMIX_cond_init();
+ simdata->mutex = SIMIX_mutex_init();
+ simdata->compute = NULL;
+ simdata->comm = NULL;
+
+ simdata->host_list = NULL;
+ simdata->comp_amount = NULL;
+ simdata->comm_amount = NULL;
+#ifdef HAVE_TRACING
+ TRACE_msg_task_create (task);
+#endif
return task;
}
+/** prevent the task from being destroyed too quickly (but also prevent it from being sent). Mainly useful in bindings */
+void MSG_task_ref(m_task_t t) {
+ t->simdata->refcount++;
+}
+
/** \ingroup m_task_management
* \brief Return the user data of a #m_task_t.
*
- * This functions checks whether \a task is a valid pointer or not and return
+ * This function checks whether \a task is a valid pointer or not and return
the user data associated to \a task if it is possible.
*/
void *MSG_task_get_data(m_task_t task)
return (task->data);
}
+/** \ingroup m_task_management
+ * \brief Sets the user data of a #m_task_t.
+ *
+ * This function allows to associate a new pointer to
+ the user data associated of \a task.
+ */
+void MSG_task_set_data(m_task_t task,void *data)
+{
+ xbt_assert0((task != NULL), "Invalid parameter");
+
+ task->data = data;
+}
+
/** \ingroup m_task_management
* \brief Return the sender of a #m_task_t.
*
*/
m_process_t MSG_task_get_sender(m_task_t task)
{
- xbt_assert0(task, "Invalid parameters");
- return ((simdata_task_t) task->simdata)->sender;
+ xbt_assert0(task, "Invalid parameters");
+ return ((simdata_task_t) task->simdata)->sender;
+}
+
+/** \ingroup m_task_management
+ * \brief Return the source of a #m_task_t.
+ *
+ * This functions returns the #m_host_t from which this task was sent
+ */
+m_host_t MSG_task_get_source(m_task_t task)
+{
+ xbt_assert0(task, "Invalid parameters");
+ return ((simdata_task_t) task->simdata)->source;
}
/** \ingroup m_task_management
*/
const char *MSG_task_get_name(m_task_t task)
{
- xbt_assert0(task, "Invalid parameters");
- return task->name;
+ xbt_assert0(task, "Invalid parameters");
+ return task->name;
}
*/
MSG_error_t MSG_task_destroy(m_task_t task)
{
- simdata_task_t simdata = NULL;
- surf_action_t action = NULL;
- int i;
-
+ smx_action_t action = NULL;
xbt_assert0((task != NULL), "Invalid parameter");
- task->simdata->using--;
- if(task->simdata->using>0) return MSG_OK;
-
- xbt_assert0((xbt_dynar_length(task->simdata->sleeping)==0),
- "Task still used. There is a problem. Cannot destroy it now!");
+ /* why? if somebody is using, then you can't free! ok... but will return MSG_OK? when this task will be destroyed? isn't the user code wrong? */
+ task->simdata->refcount--;
+ if (task->simdata->refcount > 0)
+ return MSG_OK;
+#ifdef HAVE_TRACING
+ TRACE_msg_task_destroy (task);
+#endif
- if(task->name) free(task->name);
+ if (task->name)
+ free(task->name);
- xbt_dynar_free(&(task->simdata->sleeping));
+ SIMIX_cond_destroy(task->simdata->cond);
+ SIMIX_mutex_destroy(task->simdata->mutex);
action = task->simdata->compute;
- if(action) action->resource_type->common_public->action_free(action);
- action = task->simdata->comm;
- if(action) action->resource_type->common_public->action_free(action);
-
+ if (action)
+ SIMIX_action_destroy(action);
+
+ /* parallel tasks only */
+ if (task->simdata->host_list)
+ xbt_free(task->simdata->host_list);
- free(task->simdata);
- free(task);
+ /* free main structures */
+ xbt_free(task->simdata);
+ xbt_free(task);
return MSG_OK;
}
-/* static MSG_error_t __MSG_task_check(m_task_t task) */
-/* { */
-/* simdata_task_t simdata = NULL; */
-/* int warning = 0; */
-
-/* if (task == NULL) { /\* Fatal *\/ */
-/* WARNING("Task uninitialized"); */
-/* return MSG_FATAL; */
-/* } */
-/* simdata = task->simdata; */
-
-/* if (simdata == NULL) { /\* Fatal *\/ */
-/* WARNING("Simulator Data uninitialized"); */
-/* return MSG_FATAL; */
-/* } */
-
-/* if (simdata->compute == NULL) { /\* Fatal if execute ... *\/ */
-/* WARNING("No duration set for this task"); */
-/* warning++; */
-/* } */
-
-/* if (simdata->message_size == 0) { /\* Fatal if transfered ... *\/ */
-/* WARNING("No message_size set for this task"); */
-/* warning++; */
-/* } */
-
-/* /\* if (task->data == NULL) { *\/ */
-/* /\* WARNING("User Data uninitialized"); *\/ */
-/* /\* warning++; *\/ */
-/* /\* } *\/ */
-
-/* if (warning) */
-/* return MSG_WARNING; */
-/* return MSG_OK; */
-/* } */
-
-/* static m_task_t __MSG_task_copy(m_task_t src) */
-/* { */
-/* m_task_t copy = NULL; */
-/* simdata_task_t simdata = NULL; */
-
-/* __MSG_task_check(src); */
-
-/* simdata = src->simdata; */
-/* copy = MSG_task_create(src->name, SG_getTaskCost(simdata->compute), */
-/* simdata->message_size, MSG_task_get_data(src)); */
-
-/* return (copy); */
-/* } */
-
-MSG_error_t __MSG_task_wait_event(m_process_t process, m_task_t task)
+
+/** \ingroup m_task_management
+ * \brief Cancel a #m_task_t.
+ * \param task the taskt to cancel. If it was executed or transfered, it
+ stops the process that were working on it.
+ */
+MSG_error_t MSG_task_cancel(m_task_t task)
{
- int _cursor;
- m_process_t proc = NULL;
-
- xbt_assert0(((task != NULL)
- && (task->simdata != NULL)), "Invalid parameters");
-
- xbt_dynar_push(task->simdata->sleeping, &process);
- process->simdata->waiting_task = task;
- xbt_context_yield();
- process->simdata->waiting_task = NULL;
- xbt_dynar_foreach(task->simdata->sleeping,_cursor,proc) {
- if(proc==process)
- xbt_dynar_remove_at(task->simdata->sleeping,_cursor,&proc);
+ xbt_assert0((task != NULL), "Invalid parameter");
+
+ if (task->simdata->compute) {
+ SIMIX_action_cancel(task->simdata->compute);
+ return MSG_OK;
+ }
+ if (task->simdata->comm) {
+ SIMIX_communication_cancel(task->simdata->comm);
+ return MSG_OK;
}
+ THROW_IMPOSSIBLE;
+}
- return MSG_OK;
+/** \ingroup m_task_management
+ * \brief Returns the computation amount needed to process a task #m_task_t.
+ * Once a task has been processed, this amount is thus set to 0...
+ */
+double MSG_task_get_compute_duration(m_task_t task)
+{
+ xbt_assert0((task != NULL)
+ && (task->simdata != NULL), "Invalid parameter");
+
+ return task->simdata->computation_amount;
+}
+
+/** \ingroup m_task_management
+ * \brief Returns the remaining computation amount of a task #m_task_t.
+ *
+ */
+double MSG_task_get_remaining_computation(m_task_t task)
+{
+ xbt_assert0((task != NULL)
+ && (task->simdata != NULL), "Invalid parameter");
+
+ if (task->simdata->compute) {
+ return SIMIX_action_get_remains(task->simdata->compute);
+ } else {
+ return task->simdata->computation_amount;
+ }
+}
+
+
+
+/** \ingroup m_task_management
+ * \brief Returns the total amount received by a task #m_task_t.
+ *
+ */
+double MSG_task_get_remaining_communication(m_task_t task)
+{
+ xbt_assert0((task != NULL)
+ && (task->simdata != NULL), "Invalid parameter");
+
+ return SIMIX_communication_get_remains(task->simdata->comm);
}
+
+/** \ingroup m_task_management
+ * \brief Returns the size of the data attached to a task #m_task_t.
+ *
+ */
+double MSG_task_get_data_size(m_task_t task)
+{
+ xbt_assert0((task != NULL)
+ && (task->simdata != NULL), "Invalid parameter");
+
+ return task->simdata->message_size;
+}
+
+
+
+/** \ingroup m_task_management
+ * \brief Changes the priority of a computation task. This priority doesn't affect
+ * the transfer rate. A priority of 2 will make a task receive two times more
+ * cpu power than the other ones.
+ *
+ */
+void MSG_task_set_priority(m_task_t task, double priority)
+{
+ xbt_assert0((task != NULL)
+ && (task->simdata != NULL), "Invalid parameter");
+
+ task->simdata->priority = 1 / priority;
+ if (task->simdata->compute)
+ SIMIX_action_set_priority(task->simdata->compute,
+ task->simdata->priority);
+}
+
+
