}
+/** \ingroup m_task_management
+ * \brief set the amount data attached with a task #msg_task_t.
+ *
+ * \warning If the transfer is ongoing (already started and not finished),
+ * it is not modified by this call.
+ */
+
+void MSG_task_set_data_size(msg_task_t task,
+ double data_size)
+{
+ xbt_assert(task, "Invalid parameter");
+ task->simdata->message_size = data_size;
+
+}
+
+
+
/** \ingroup m_task_management
* \brief Returns the remaining computation amount of a task #msg_task_t.
*