+++ /dev/null
-/* Copyright (c) 2004-2015. 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. */
-
-#include "msg_private.h"
-#include "src/simix/smx_private.h"
-#include "xbt/sysdep.h"
-#include "xbt/log.h"
-
-/** @addtogroup m_task_management
- *
- *
- * 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
- * right level of abstraction for our purposes. A <em>task</em>
- * may then be defined by a <em>computing amount</em>, a
- * <em>message size</em> and some <em>private data</em>.
- */
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_task, msg,
- "Logging specific to MSG (task)");
-
-/********************************* Task **************************************/
-/** \ingroup m_task_management
- * \brief Creates a new #msg_task_t.
- *
- * A constructor for #msg_task_t taking four arguments and returning the
- corresponding object.
- * \param name a name for the object. It is for user-level information
- and can be NULL.
- * \param flop_amount 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 bytes) needed to
- transfer this new task. If 0, then it cannot be transfered with
- MSG_task_send() and MSG_task_recv(). This value has to be >=0.
- * \param data a pointer to any data may want to attach to the new
- object. It is for user-level information and can be NULL. It can
- be retrieved with the function \ref MSG_task_get_data.
- * \see msg_task_t
- * \return The new corresponding object.
- */
-msg_task_t MSG_task_create(const char *name, double flop_amount,
- double message_size, void *data)
-{
- msg_task_t task = xbt_new(s_msg_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->data = data;
-
- /* Simulator Data */
- simdata->compute = NULL;
- simdata->comm = NULL;
- simdata->bytes_amount = message_size;
- simdata->flops_amount = flop_amount;
- simdata->sender = NULL;
- simdata->receiver = NULL;
- simdata->source = NULL;
- simdata->priority = 1.0;
- simdata->bound = 0;
- simdata->affinity_mask_db = xbt_dict_new_homogeneous(NULL);
- simdata->rate = -1.0;
- simdata->isused = 0;
-
- simdata->host_nb = 0;
- simdata->host_list = NULL;
- simdata->flops_parallel_amount = NULL;
- simdata->bytes_parallel_amount = NULL;
- TRACE_msg_task_create(task);
-
- return task;
-}
-
-/** \ingroup m_task_management
- * \brief Creates a new #msg_task_t (a parallel one....).
- *
- * A constructor for #msg_task_t taking six arguments and returning the
- corresponding object.
- * \param name a name for the object. It is for user-level information
- and can be NULL.
- * \param host_nb the number of hosts implied in the parallel task.
- * \param host_list an array of \p host_nb msg_host_t.
- * \param flops_amount an array of \p host_nb doubles.
- * flops_amount[i] is the total number of operations that have to be performed on host_list[i].
- * \param bytes_amount an array of \p host_nb* \p host_nb doubles.
- * \param data a pointer to any data may want to attach to the new object.
- * It is for user-level information and can be NULL.
- * It can be retrieved with the function \ref MSG_task_get_data.
- * \see msg_task_t
- * \return The new corresponding object.
- */
-msg_task_t
-MSG_parallel_task_create(const char *name, int host_nb,
- const msg_host_t * host_list,
- double *flops_amount,
- double *bytes_amount, void *data)
-{
- msg_task_t task = MSG_task_create(name, 0, 0, data);
- simdata_task_t simdata = task->simdata;
- int i;
-
- /* Simulator Data specific to parallel tasks */
- simdata->host_nb = host_nb;
- simdata->host_list = xbt_new0(sg_host_t, host_nb);
- simdata->flops_parallel_amount = flops_amount;
- simdata->bytes_parallel_amount = bytes_amount;
-
- for (i = 0; i < host_nb; i++)
- simdata->host_list[i] = host_list[i];
-
- return task;
-}
-
-/*************** Begin GPU ***************/
-/** \ingroup m_task_management
- * \brief Creates a new #msg_gpu_task_t.
-
- * A constructor for #msg_gpu_task_t taking four arguments and returning
- a pointer to the new created GPU task.
-
- * \param name a name for the object. It is for user-level information
- and can be NULL.
-
- * \param flops_amount a value of the processing amount (in flop)
- needed to process this new task. If 0, then it cannot be executed with
- MSG_gpu_task_execute(). This value has to be >=0.
-
- * \param dispatch_latency time in seconds to load this task on the GPU
-
- * \param collect_latency time in seconds to transfer result from the GPU
- back to the CPU (host) when done
-
- * \see msg_gpu_task_t
- * \return The new corresponding object.
- */
-msg_gpu_task_t MSG_gpu_task_create(const char *name, double flops_amount,
- double dispatch_latency, double collect_latency)
-{
- msg_gpu_task_t task = xbt_new(s_msg_gpu_task_t, 1);
- simdata_gpu_task_t simdata = xbt_new(s_simdata_gpu_task_t, 1);
- task->simdata = simdata;
- /* Task structure */
- task->name = xbt_strdup(name);
-
- /* Simulator Data */
- simdata->flops_amount = flops_amount;
- simdata->dispatch_latency = dispatch_latency;
- simdata->collect_latency = collect_latency;
-
- /* TRACE_msg_gpu_task_create(task); FIXME*/
-
- return task;
-}
-/*************** End GPU ***************/
-
-/** \ingroup m_task_management
- * \brief Return the user data of a #msg_task_t.
- *
- * 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(msg_task_t task)
-{
- xbt_assert((task != NULL), "Invalid parameter");
-
- return (task->data);
-}
-
-/** \ingroup m_task_management
- * \brief Sets the user data of a #msg_task_t.
- *
- * This function allows to associate a new pointer to
- the user data associated of \a task.
- */
-void MSG_task_set_data(msg_task_t task, void *data)
-{
- xbt_assert((task != NULL), "Invalid parameter");
-
- task->data = data;
-}
-
-/** \ingroup m_task_management
- * \brief Sets a function to be called when a task has just been copied.
- * \param callback a callback function
- */
-void MSG_task_set_copy_callback(void (*callback)
- (msg_task_t task, msg_process_t sender, msg_process_t receiver)) {
-
- msg_global->task_copy_callback = callback;
-
- if (callback) {
- SIMIX_comm_set_copy_data_callback(MSG_comm_copy_data_from_SIMIX);
- }
- else {
- SIMIX_comm_set_copy_data_callback(SIMIX_comm_copy_pointer_callback);
- }
-}
-
-/** \ingroup m_task_management
- * \brief Return the sender of a #msg_task_t.
- *
- * This functions returns the #msg_process_t which sent this task
- */
-msg_process_t MSG_task_get_sender(msg_task_t task)
-{
- xbt_assert(task, "Invalid parameters");
- return ((simdata_task_t) task->simdata)->sender;
-}
-
-/** \ingroup m_task_management
- * \brief Return the source of a #msg_task_t.
- *
- * This functions returns the #msg_host_t from which this task was sent
- */
-msg_host_t MSG_task_get_source(msg_task_t task)
-{
- xbt_assert(task, "Invalid parameters");
- return ((simdata_task_t) task->simdata)->source;
-}
-
-/** \ingroup m_task_management
- * \brief Return the name of a #msg_task_t.
- *
- * This functions returns the name of a #msg_task_t as specified on creation
- */
-const char *MSG_task_get_name(msg_task_t task)
-{
- xbt_assert(task, "Invalid parameters");
- return task->name;
-}
-
-/** \ingroup m_task_management
- * \brief Sets the name of a #msg_task_t.
- *
- * This functions allows to associate a name to a task
- */
-void MSG_task_set_name(msg_task_t task, const char *name)
-{
- xbt_assert(task, "Invalid parameters");
- task->name = xbt_strdup(name);
-}
-
-/** \ingroup m_task_management
- * \brief Destroy a #msg_task_t.
- *
- * Destructor for #msg_task_t. Note that you should free user data, if any, \b
- * before calling this function.
- *
- * Only the process that owns the task can destroy it.
- * The owner changes after a successful send.
- * If a task is successfully sent, the receiver becomes the owner and is
- * supposed to destroy it. The sender should not use it anymore.
- * If the task failed to be sent, the sender remains the owner of the task.
- */
-msg_error_t MSG_task_destroy(msg_task_t task)
-{
- smx_synchro_t action = NULL;
- xbt_assert((task != NULL), "Invalid parameter");
-
- if (task->simdata->isused) {
- /* the task is being sent or executed: cancel it first */
- MSG_task_cancel(task);
- }
- TRACE_msg_task_destroy(task);
-
- xbt_free(task->name);
-
- action = task->simdata->compute;
- if (action)
- simcall_process_execution_destroy(action);
-
- /* parallel tasks only */
- xbt_free(task->simdata->host_list);
-
- xbt_dict_free(&task->simdata->affinity_mask_db);
-
- /* free main structures */
- xbt_free(task->simdata);
- xbt_free(task);
-
- return MSG_OK;
-}
-
-
-/** \ingroup m_task_usage
- * \brief Cancel a #msg_task_t.
- * \param task the task to cancel. If it was executed or transfered, it
- stops the process that were working on it.
- */
-msg_error_t MSG_task_cancel(msg_task_t task)
-{
- xbt_assert((task != NULL), "Cannot cancel a NULL task");
-
- if (task->simdata->compute) {
- simcall_process_execution_cancel(task->simdata->compute);
- }
- else if (task->simdata->comm) {
- simdata_task_t simdata = task->simdata;
- simcall_comm_cancel(simdata->comm);
- if (msg_global->debug_multiple_use && simdata->isused!=0)
- xbt_ex_free(*(xbt_ex_t*)simdata->isused);
- simdata->isused = 0;
- }
- return MSG_OK;
-}
-
-/** \ingroup m_task_management
- * \brief Returns the remaining amount of flops needed to execute a task #msg_task_t.
- *
- * Once a task has been processed, this amount is set to 0. If you want, you
- * can reset this value with #MSG_task_set_flops_amount before restarting the task.
- */
-double MSG_task_get_flops_amount(msg_task_t task) {
-
- if (task->simdata->compute) {
- return simcall_process_execution_get_remains(task->simdata->compute);
- } else {
- return task->simdata->flops_amount;
- }
-}
-
-
-/** \ingroup m_task_management
- * \brief set the computation amount needed to process a task #msg_task_t.
- *
- * \warning If the computation is ongoing (already started and not finished),
- * it is not modified by this call. Moreover, after its completion, the ongoing
- * execution with set the flops_amount to zero, overriding any value set during
- * the execution.
- */
-
-void MSG_task_set_flops_amount(msg_task_t task, double flops_amount)
-{
- task->simdata->flops_amount = flops_amount;
-}
-
-/** \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_bytes_amount(msg_task_t task, double data_size)
-{
- task->simdata->bytes_amount = data_size;
-}
-
-
-/** \ingroup m_task_management
- * \brief Returns the total amount received by a task #msg_task_t.
- * If the communication does not exist it will return 0.
- * So, if the communication has FINISHED or FAILED it returns
- * zero.
- */
-double MSG_task_get_remaining_communication(msg_task_t task)
-{
- xbt_assert((task != NULL)
- && (task->simdata != NULL), "Invalid parameter");
- XBT_DEBUG("calling simcall_communication_get_remains(%p)",
- task->simdata->comm);
- return simcall_comm_get_remains(task->simdata->comm);
-}
-
-#ifdef HAVE_LATENCY_BOUND_TRACKING
-/** \ingroup m_task_management
- * \brief Return 1 if communication task is limited by latency, 0 otherwise
- *
- */
-int MSG_task_is_latency_bounded(msg_task_t task)
-{
- xbt_assert((task != NULL)
- && (task->simdata != NULL), "Invalid parameter");
- XBT_DEBUG("calling simcall_communication_is_latency_bounded(%p)",
- task->simdata->comm);
- return simcall_comm_is_latency_bounded(task->simdata->comm);
-}
-#endif
-
-/** \ingroup m_task_management
- * \brief Returns the size of the data attached to a task #msg_task_t.
- *
- */
-double MSG_task_get_bytes_amount(msg_task_t task)
-{
- xbt_assert((task != NULL)
- && (task->simdata != NULL), "Invalid parameter");
-
- return task->simdata->bytes_amount;
-}
-
-
-
-/** \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(msg_task_t task, double priority)
-{
- xbt_assert((task != NULL)
- && (task->simdata != NULL), "Invalid parameter");
-
- task->simdata->priority = 1 / priority;
- if (task->simdata->compute)
- simcall_process_execution_set_priority(task->simdata->compute,
- task->simdata->priority);
-}
-
-
-/** \ingroup m_task_management
- * \brief Changes the maximum CPU utilization of a computation task.
- * Unit is flops/s.
- *
- * For VMs, there is a pitfall. Please see MSG_vm_set_bound().
- */
-void MSG_task_set_bound(msg_task_t task, double bound)
-{
- xbt_assert(task, "Invalid parameter");
- xbt_assert(task->simdata, "Invalid parameter");
-
- if (bound == 0)
- XBT_INFO("bound == 0 means no capping (i.e., unlimited).");
-
- task->simdata->bound = bound;
- if (task->simdata->compute)
- simcall_process_execution_set_bound(task->simdata->compute,
- task->simdata->bound);
-}
-
-
-/** \ingroup m_task_management
- * \brief Changes the CPU affinity of a computation task.
- *
- * When pinning the given task to the first CPU core of the given host, use
- * 0x01 for the mask value. Each bit of the mask value corresponds to each CPU
- * core. See taskset(1) on Linux.
- *
- * \param task a target task
- * \param host the host having a multi-core CPU
- * \param mask the bit mask of a new CPU affinity setting for the task
- *
- *
- * Usage:
- * 0. Define a host with multiple cores.
- * \<host id="PM0" power="1E8" core="2"/\>
- *
- * 1. Pin a given task to the first CPU core of a host.
- * MSG_task_set_affinity(task, pm0, 0x01);
- *
- * 2. Pin a given task to the third CPU core of a host. Turn on the third bit of the mask.
- * MSG_task_set_affinity(task, pm0, 0x04); // 0x04 == 100B
- *
- * 3. Pin a given VM to the first CPU core of a host.
- * MSG_vm_set_affinity(vm, pm0, 0x01);
- *
- * See examples/msg/cloud/multicore.c for more information.
- *
- *
- * Note:
- * 1. The current code does not allow an affinity of a task to multiple cores.
- * The mask value 0x03 (i.e., a given task will be executed on the first core
- * or the second core) is not allowed. The mask value 0x01 or 0x02 works. See
- * cpu_cas01.c for details.
- *
- * 2. It is recommended to first compare simulation results in both the Lazy
- * and Full calculation modes (using --cfg=cpu/optim:Full or not). Fix
- * cpu_cas01.c if you find wrong results in the Lazy mode.
- *
- */
-void MSG_task_set_affinity(msg_task_t task, msg_host_t host, unsigned long mask)
-{
- xbt_assert(task, "Invalid parameter");
- xbt_assert(task->simdata, "Invalid parameter");
-
- if (mask == 0) {
- /* 0 means clear */
- {
- /* We need remove_ext() not throwing exception. */
- void *ret = xbt_dict_get_or_null_ext(task->simdata->affinity_mask_db, (char *) host, sizeof(msg_host_t));
- if (ret != NULL)
- xbt_dict_remove_ext(task->simdata->affinity_mask_db, (char *) host, sizeof(host));
- }
- } else
- xbt_dict_set_ext(task->simdata->affinity_mask_db, (char *) host, sizeof(host), (void *)(uintptr_t) mask, NULL);
-
- /* We set affinity data of this task. If the task is being executed, we
- * actually change the affinity setting of the task. Otherwise, this change
- * will be applied when the task is executed. */
-
- if (!task->simdata->compute) {
- /* task is not yet executed */
- XBT_INFO("set affinity(0x%04lx@%s) for %s (not active now)", mask, MSG_host_get_name(host), MSG_task_get_name(task));
- return;
- }
-
- {
- smx_synchro_t compute = task->simdata->compute;
- msg_host_t host_now = compute->execution.host; // simix_private.h is necessary
- if (host_now != host) {
- /* task is not yet executed on this host */
- XBT_INFO("set affinity(0x%04lx@%s) for %s (not active now)", mask, MSG_host_get_name(host), MSG_task_get_name(task));
- return;
- }
-
- /* task is being executed on this host. so change the affinity now */
- {
- /* check it works. remove me if it works. */
- xbt_assert((unsigned long)(uintptr_t) xbt_dict_get_or_null_ext(task->simdata->affinity_mask_db, (char *) host, sizeof(msg_host_t)) == mask);
- }
-
- XBT_INFO("set affinity(0x%04lx@%s) for %s", mask, MSG_host_get_name(host), MSG_task_get_name(task));
- simcall_process_execution_set_affinity(task->simdata->compute, host, mask);
- }
-}
