#include <stdio.h>
#include <stdlib.h>
#include "msg/msg.h" /* Yeah! If you want to use msg, you need to include msg/msg.h */
+#include "msg/mailbox.h" /* we play funny tricks with mailboxes and rdv points */
#include "simix/simix.h" /* semaphores for the barrier */
#include "xbt.h" /* calloc, printf */
#include "instr/instr_private.h"
sprintf(to, "%s_%s", MSG_process_get_name(MSG_process_self()),action[2]);
- msg_comm_t comm =
- MSG_task_isend( MSG_task_create(to,0,parse_double(size),NULL), to);
+ m_task_t task = MSG_task_create(to,0,parse_double(size),NULL);
+ msg_comm_t comm = MSG_task_isend_with_matching(task, to, /*matching madness*/NULL,task);
xbt_dynar_push(globals->isends,&comm);
XBT_DEBUG("Isend on %s", MSG_process_get_name(MSG_process_self()));
asynchronous_cleanup();
}
+static int task_matching(void*sent_task,void*ignored) {
+ m_task_t t = (m_task_t)sent_task;
+ if (MSG_task_get_data_size(t)<65536)
+ return 1; /* that's supposed to be already arrived */
+ return 0; /* rendez-vous mode: it's not there yet */
+}
static void action_recv(const char *const *action)
{
if (XBT_LOG_ISENABLED(actions, xbt_log_priority_verbose))
name = xbt_str_join_array(action, " ");
+ /* The next chunk is to deal with the fact that for short messages,
+ * if the send occurs before the receive, the message is already sent and
+ * buffered on receiver side when the recv() occurs.
+ *
+ * So the next chunk detects this fact and cancel the simix communication instead.
+ */
+
+ /* make sure the rdv is created on need by asking to MSG instead of simix directly */
+ smx_rdv_t rdv = MSG_mailbox_get_by_alias(mailbox_name);
+ smx_action_t act = SIMIX_comm_get_send_match(rdv,task_matching,NULL);
+ if (act!=NULL){
+ /* FIXME account for the memcopy time if needed */
+ SIMIX_comm_finish(act);
+ return;
+ }
+
#ifdef HAVE_TRACING
int rank = get_rank(MSG_process_get_name(MSG_process_self()));
int src_traced = get_rank(action[2]);