1 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/kernel/activity/CommImpl.hpp"
7 #include "simgrid/kernel/resource/Action.hpp"
8 #include "simgrid/modelchecker.h"
9 #include "simgrid/s4u/Host.hpp"
10 #include "src/kernel/activity/MailboxImpl.hpp"
11 #include "src/mc/mc_replay.hpp"
12 #include "src/surf/network_interface.hpp"
13 #include "src/surf/surf_interface.hpp"
15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_network);
17 /******************************************************************************/
18 /* SIMIX_comm_copy_data callbacks */
19 /******************************************************************************/
20 static void (*SIMIX_comm_copy_data_callback)(smx_activity_t, void*, size_t) = &SIMIX_comm_copy_pointer_callback;
22 void SIMIX_comm_set_copy_data_callback(void (*callback)(smx_activity_t, void*, size_t))
24 SIMIX_comm_copy_data_callback = callback;
27 void SIMIX_comm_copy_pointer_callback(smx_activity_t synchro, void* buff, size_t buff_size)
29 simgrid::kernel::activity::CommImplPtr comm =
30 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
32 xbt_assert((buff_size == sizeof(void*)), "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
33 *(void**)(comm->dst_buff_) = buff;
40 CommImpl::CommImpl(CommImpl::Type type) : type(type)
42 state_ = SIMIX_WAITING;
45 XBT_DEBUG("Create comm activity %p", this);
50 XBT_DEBUG("Really free communication %p", this);
54 if (detached && state_ != SIMIX_DONE) {
55 /* the communication has failed and was detached:
56 * we have to free the buffer */
66 /** @brief Starts the simulation of a communication synchro. */
67 void CommImpl::start()
69 /* If both the sender and the receiver are already there, start the communication */
70 if (state_ == SIMIX_READY) {
72 s4u::Host* sender = src_actor_->host_;
73 s4u::Host* receiver = dst_actor_->host_;
75 surf_action_ = surf_network_model->communicate(sender, receiver, task_size_, rate_);
76 surf_action_->set_data(this);
77 state_ = SIMIX_RUNNING;
79 XBT_DEBUG("Starting communication %p from '%s' to '%s' (surf_action: %p)", this, sender->get_cname(),
80 receiver->get_cname(), surf_action_);
82 /* If a link is failed, detect it immediately */
83 if (surf_action_->get_state() == resource::Action::State::FAILED) {
84 XBT_DEBUG("Communication from '%s' to '%s' failed to start because of a link failure", sender->get_cname(),
85 receiver->get_cname());
86 state_ = SIMIX_LINK_FAILURE;
90 /* If any of the process is suspended, create the synchro but stop its execution,
91 it will be restarted when the sender process resume */
92 if (src_actor_->is_suspended() || dst_actor_->is_suspended()) {
93 if (src_actor_->is_suspended())
94 XBT_DEBUG("The communication is suspended on startup because src (%s@%s) was suspended since it initiated the "
96 src_actor_->get_cname(), src_actor_->host_->get_cname());
98 XBT_DEBUG("The communication is suspended on startup because dst (%s@%s) was suspended since it initiated the "
100 dst_actor_->get_cname(), dst_actor_->host_->get_cname());
102 surf_action_->suspend();
107 /** @brief Copy the communication data from the sender's buffer to the receiver's one */
108 void CommImpl::copy_data()
110 size_t buff_size = src_buff_size_;
111 /* If there is no data to copy then return */
112 if (not src_buff_ || not dst_buff_ || copied)
115 XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)", this,
116 src_actor_ ? src_actor_->host_->get_cname() : "a finished process", src_buff_,
117 dst_actor_ ? dst_actor_->host_->get_cname() : "a finished process", dst_buff_, buff_size);
119 /* Copy at most dst_buff_size bytes of the message to receiver's buffer */
121 buff_size = std::min(buff_size, *(dst_buff_size_));
123 /* Update the receiver's buffer size to the copied amount */
125 *dst_buff_size_ = buff_size;
129 copy_data_fun(this, src_buff_, buff_size);
131 SIMIX_comm_copy_data_callback(this, src_buff_, buff_size);
134 /* Set the copied flag so we copy data only once */
135 /* (this function might be called from both communication ends) */
139 void CommImpl::suspend()
141 /* FIXME: shall we suspend also the timeout synchro? */
143 surf_action_->suspend();
144 /* if not created yet, the action will be suspended on creation, in CommImpl::start() */
147 void CommImpl::resume()
149 /*FIXME: check what happen with the timeouts */
151 surf_action_->resume();
152 /* in the other case, the synchro were not really suspended yet, see CommImpl::suspend() and CommImpl::start() */
155 void CommImpl::cancel()
157 /* if the synchro is a waiting state means that it is still in a mbox so remove from it and delete it */
158 if (state_ == SIMIX_WAITING) {
160 state_ = SIMIX_CANCELED;
161 } else if (not MC_is_active() /* when running the MC there are no surf actions */
162 && not MC_record_replay_is_active() && (state_ == SIMIX_READY || state_ == SIMIX_RUNNING)) {
163 surf_action_->cancel();
167 /** @brief get the amount remaining from the communication */
168 double CommImpl::remains()
170 return surf_action_->get_remains();
173 /** @brief This is part of the cleanup process, probably an internal command */
174 void CommImpl::cleanupSurf()
177 surf_action_->unref();
178 surf_action_ = nullptr;
182 src_timeout_->unref();
183 src_timeout_ = nullptr;
187 dst_timeout_->unref();
188 dst_timeout_ = nullptr;
192 void CommImpl::post()
194 /* Update synchro state */
195 if (src_timeout_ && src_timeout_->get_state() == resource::Action::State::FINISHED)
196 state_ = SIMIX_SRC_TIMEOUT;
197 else if (dst_timeout_ && dst_timeout_->get_state() == resource::Action::State::FINISHED)
198 state_ = SIMIX_DST_TIMEOUT;
199 else if (src_timeout_ && src_timeout_->get_state() == resource::Action::State::FAILED)
200 state_ = SIMIX_SRC_HOST_FAILURE;
201 else if (dst_timeout_ && dst_timeout_->get_state() == resource::Action::State::FAILED)
202 state_ = SIMIX_DST_HOST_FAILURE;
203 else if (surf_action_ && surf_action_->get_state() == resource::Action::State::FAILED) {
204 state_ = SIMIX_LINK_FAILURE;
208 XBT_DEBUG("SIMIX_post_comm: comm %p, state %d, src_proc %p, dst_proc %p, detached: %d", this, (int)state_,
209 src_actor_.get(), dst_actor_.get(), detached);
211 /* destroy the surf actions associated with the Simix communication */
214 /* if there are simcalls associated with the synchro, then answer them */
215 if (not simcalls_.empty()) {
216 SIMIX_comm_finish(this);
220 } // namespace activity
221 } // namespace kernel
222 } // namespace simgrid