SimGrid  3.15
Versatile Simulation of Distributed Systems
examples/msg/actions-comm/actions-comm.c
/* Copyright (c) 2009-2016. 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 "simgrid/msg.h"
#include "simgrid/simix.h" /* semaphores for the barrier */
#include <xbt/replay.hpp>
XBT_LOG_NEW_DEFAULT_CATEGORY(actions, "Messages specific for this msg example");
static void action_Isend(const char *const *action);
typedef struct {
int last_Irecv_sender_id;
int bcast_counter;
xbt_dynar_t isends; /* of msg_comm_t */
/* Used to implement irecv+wait */
xbt_dynar_t irecvs; /* of msg_comm_t */
xbt_dynar_t tasks; /* of msg_task_t */
} s_process_globals_t;
typedef s_process_globals_t *process_globals_t;
/* Helper function */
static double parse_double(const char *string)
{
double value;
char *endptr;
value = strtod(string, &endptr);
if (*endptr != '\0')
THROWF(unknown_error, 0, "%s is not a double", string);
return value;
}
#define ACT_DEBUG(...) \
if (XBT_LOG_ISENABLED(actions, xbt_log_priority_verbose)) { \
char *NAME = xbt_str_join_array(action, " "); \
XBT_DEBUG(__VA_ARGS__); \
xbt_free(NAME); \
} else ((void)0)
static void log_action(const char *const *action, double date)
{
char *name = xbt_str_join_array(action, " ");
XBT_VERB("%s %f", name, date);
xbt_free(name);
}
}
static void asynchronous_cleanup(void)
{
process_globals_t globals = (process_globals_t) MSG_process_get_data(MSG_process_self());
/* Destroy any isend which correspond to completed communications */
while (1/*true*/) {
int pos_found = MSG_comm_testany(globals->isends);
if (pos_found == -1) /* none remaining */
break;
xbt_dynar_remove_at(globals->isends, pos_found, &comm);
}
}
/* My actions */
static void action_send(const char *const *action)
{
char to[250];
const char *size_str = action[3];
double size = parse_double(size_str);
double clock = MSG_get_clock();
snprintf(to,249, "%s_%s", MSG_process_get_name(MSG_process_self()), action[2]);
ACT_DEBUG("Entering Send: %s (size: %g)", NAME, size);
if (size < 65536) {
action_Isend(action);
} else {
MSG_task_send(MSG_task_create(to, 0, size, NULL), to);
}
log_action(action, MSG_get_clock() - clock);
asynchronous_cleanup();
}
static void action_Isend(const char *const *action)
{
char to[250];
const char *size = action[3];
double clock = MSG_get_clock();
process_globals_t globals = (process_globals_t) MSG_process_get_data(MSG_process_self());
snprintf(to,249, "%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);
xbt_dynar_push(globals->isends, &comm);
log_action(action, MSG_get_clock() - clock);
asynchronous_cleanup();
}
static void action_recv(const char *const *action)
{
char mailbox_name[250];
msg_task_t task = NULL;
double clock = MSG_get_clock();
snprintf(mailbox_name,249, "%s_%s", action[2], MSG_process_get_name(MSG_process_self()));
ACT_DEBUG("Receiving: %s", NAME);
msg_error_t res = MSG_task_receive(&task, mailbox_name);
log_action(action, MSG_get_clock() - clock);
if (res == MSG_OK) {
}
asynchronous_cleanup();
}
static void action_Irecv(const char *const *action)
{
char mailbox[250];
double clock = MSG_get_clock();
process_globals_t globals = (process_globals_t) MSG_process_get_data(MSG_process_self());
snprintf(mailbox,249, "%s_%s", action[2], MSG_process_get_name(MSG_process_self()));
msg_task_t t = NULL;
xbt_dynar_push(globals->tasks, &t);
msg_comm_t c = MSG_task_irecv(xbt_dynar_get_ptr(globals->tasks, xbt_dynar_length(globals->tasks) - 1), mailbox);
xbt_dynar_push(globals->irecvs, &c);
log_action(action, MSG_get_clock() - clock);
asynchronous_cleanup();
}
static void action_wait(const char *const *action)
{
msg_task_t task = NULL;
double clock = MSG_get_clock();
process_globals_t globals = (process_globals_t) MSG_process_get_data(MSG_process_self());
xbt_assert(xbt_dynar_length(globals->irecvs), "action wait not preceded by any irecv: %s",
xbt_str_join_array(action, " "));
ACT_DEBUG("Entering %s", NAME);
comm = xbt_dynar_pop_as(globals->irecvs, msg_comm_t);
MSG_comm_wait(comm, -1);
task = xbt_dynar_pop_as(globals->tasks, msg_task_t);
log_action(action, MSG_get_clock() - clock);
}
/* FIXME: that's a poor man's implementation: we should take the message exchanges into account */
static void action_barrier(const char *const *action)
{
static smx_mutex_t mutex = NULL;
static smx_cond_t cond = NULL;
static int processes_arrived_sofar = 0;
if (mutex == NULL) { // first arriving on the barrier
mutex = simcall_mutex_init();
processes_arrived_sofar = 0;
}
ACT_DEBUG("Entering barrier: %s (%d already there)", NAME, processes_arrived_sofar);
processes_arrived_sofar++;
if (processes_arrived_sofar == communicator_size) {
} else {
simcall_cond_wait(cond, mutex);
}
ACT_DEBUG("Exiting barrier: %s", NAME);
processes_arrived_sofar--;
if (processes_arrived_sofar<=0) {
mutex = NULL;
}
}
static void action_bcast(const char *const *action)
{
char mailbox[80];
double comm_size = parse_double(action[2]);
msg_task_t task = NULL;
double clock = MSG_get_clock();
process_globals_t counters = (process_globals_t) MSG_process_get_data(MSG_process_self());
xbt_assert(communicator_size, "Size of Communicator is not defined, can't use collective operations");
const char * process_name = MSG_process_get_name(MSG_process_self());
char *bcast_identifier = bprintf("bcast_%d", counters->bcast_counter);
counters->bcast_counter++;
if (!strcmp(process_name, "p0")) {
XBT_DEBUG("%s: %s is the Root", bcast_identifier, process_name);
for (int i = 1; i < communicator_size; i++) {
snprintf(mailbox,79, "%s_p0_p%d", bcast_identifier, i);
comms[i - 1] = MSG_task_isend(MSG_task_create(mailbox, 0, comm_size, NULL), mailbox);
}
MSG_comm_waitall(comms, communicator_size - 1, -1);
for (int i = 1; i < communicator_size; i++)
MSG_comm_destroy(comms[i - 1]);
xbt_free(comms);
XBT_DEBUG("%s: all messages sent by %s have been received", bcast_identifier, process_name);
} else {
snprintf(mailbox,79, "%s_p0_%s", bcast_identifier, process_name);
MSG_task_receive(&task, mailbox);
XBT_DEBUG("%s: %s has received", bcast_identifier, process_name);
}
log_action(action, MSG_get_clock() - clock);
xbt_free(bcast_identifier);
}
static void action_comm_size(const char *const *action)
{
const char *size = action[2];
double clock = MSG_get_clock();
communicator_size = parse_double(size);
log_action(action, MSG_get_clock() - clock);
}
static void action_compute(const char *const *action)
{
const char *amount = action[2];
msg_task_t task = MSG_task_create("task", parse_double(amount), 0, NULL);
double clock = MSG_get_clock();
ACT_DEBUG("Entering %s", NAME);
log_action(action, MSG_get_clock() - clock);
}
static void action_init(const char *const *action)
{
XBT_DEBUG("Initialize the counters");
process_globals_t globals = (process_globals_t) calloc(1, sizeof(s_process_globals_t));
globals->isends = xbt_dynar_new(sizeof(msg_comm_t), NULL);
globals->irecvs = xbt_dynar_new(sizeof(msg_comm_t), NULL);
globals->tasks = xbt_dynar_new(sizeof(msg_task_t), NULL);
}
static void action_finalize(const char *const *action)
{
process_globals_t globals = (process_globals_t) MSG_process_get_data(MSG_process_self());
if (globals) {
asynchronous_cleanup();
xbt_dynar_free_container(&(globals->isends));
xbt_dynar_free_container(&(globals->irecvs));
xbt_dynar_free_container(&(globals->tasks));
xbt_free(globals);
}
}
int main(int argc, char *argv[])
{
/* Check the given arguments */
MSG_init(&argc, argv);
/* Explicit initialization of the action module is required now*/
xbt_assert(argc > 2,
"Usage: %s platform_file deployment_file [action_files]\n"
"\t# if all actions are in the same file\n"
"\tExample: %s msg_platform.xml msg_deployment.xml actions\n"
"\t# if actions are in separate files, specified in deployment\n"
"\tExample: %s msg_platform.xml msg_deployment.xml ",
argv[0],argv[0],argv[0]);
/* Action registration */
/* Actually do the simulation using MSG_action_trace_run */
msg_error_t res = MSG_action_trace_run(argv[3]); // it's ok to pass a NULL argument here
XBT_INFO("Simulation time %g", MSG_get_clock());
MSG_action_exit(); /* Explicit finalization of the action module */
return res != MSG_OK;
}