XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
-#define FINALIZE ((void*)221297) /* a magic number to tell people to stop working */
+#define FINALIZE ((void*)221297) /* a magic number to tell people to stop working */
-static char * build_channel_name(char *buffer, const char *sender, const char* receiver)
+static char* build_channel_name(char* buffer, const char* sender, const char* receiver)
{
strcpy(buffer, sender);
strcat(buffer, ":");
static int master(int argc, char* argv[]);
static int worker(int argc, char* argv[]);
-static int master(int argc, char *argv[])
+static int master(int argc, char* argv[])
{
msg_host_t host_self = MSG_host_self();
- char *master_name = (char *) MSG_host_get_name(host_self);
+ char* master_name = (char*)MSG_host_get_name(host_self);
char channel[1024];
TRACE_category(master_name);
- double timeout = xbt_str_parse_double(argv[1], "Invalid timeout: %s"); /** - timeout */
- double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /** - Task compute cost */
- double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /** - Task communication size */
+ double timeout = xbt_str_parse_double(argv[1], "Invalid timeout: %s"); /** - timeout */
+ double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s"); /** - Task compute cost */
+ double comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s"); /** - Task communication size */
/* Get the info about the worker processes */
- int workers_count = argc - 4;
+ int workers_count = MSG_get_host_number();
msg_host_t* workers = xbt_dynar_to_array(MSG_hosts_as_dynar());
for (int i = 0; i < workers_count; i++) // Remove my host from the list
/* Dispatch the tasks */
xbt_dynar_t idle_hosts = xbt_dynar_new(sizeof(msg_host_t), NULL);
- msg_host_t request_host = NULL;
- int task_num = 0;
- while (1) {
-
- while (MSG_task_listen(master_name)) {
- msg_task_t request = NULL;
- int res = MSG_task_receive(&(request), master_name);
- xbt_assert(res == MSG_OK, "MSG_task_receive failed");
- request_host = MSG_task_get_data(request);
- xbt_dynar_push(idle_hosts, &request_host);
- MSG_task_destroy(request);
- }
+ int task_num = 0;
+ while (MSG_get_clock() < timeout) {
- if(MSG_get_clock()>timeout) {
- if(xbt_dynar_length(idle_hosts) == workers_count) break;
- else {
- MSG_process_sleep(.1);
- continue;
- }
- }
-
- if(xbt_dynar_length(idle_hosts)<=0) {
- /* No request. Let's wait... */
- MSG_process_sleep(.1);
- continue;
- }
+ /* Retrieve the next incomming request */
+ XBT_DEBUG("Retrieve the next incomming request on %s", master_name);
+ msg_task_t request = NULL;
+ int res = MSG_task_receive(&(request), master_name);
+ xbt_assert(res == MSG_OK, "MSG_task_receive failed");
+ msg_host_t requester = MSG_task_get_data(request);
+ MSG_task_destroy(request);
+ /* Prepare the task to be sent */
char sprintf_buffer[64];
sprintf(sprintf_buffer, "Task_%d", task_num);
msg_task_t task = MSG_task_create(sprintf_buffer, comp_size, comm_size, NULL);
MSG_task_set_category(task, master_name);
- xbt_dynar_shift(idle_hosts, &request_host);
-
- build_channel_name(channel,master_name, MSG_host_get_name(request_host));
+ /* Send this out */
+ build_channel_name(channel, master_name, MSG_host_get_name(requester));
XBT_DEBUG("Sending '%s' to channel '%s'", task->name, channel);
MSG_task_send(task, channel);
task_num++;
}
- XBT_DEBUG ("All tasks have been dispatched. Let's tell everybody the computation is over.");
- for (int i = 0; i < workers_count; i++) {
+ XBT_DEBUG("Time is up. Let's tell everybody the computation is over.");
+ for (int i = 0; i < workers_count; i++) { /* We don't write in order, but the total amount is right
+
+ /* Don't write to a worker that did not request for work, or it will deadlock: both would be sending something */
+ msg_task_t request = NULL;
+ int res = MSG_task_receive(&(request), master_name);
+ xbt_assert(res == MSG_OK, "MSG_task_receive failed");
+ msg_host_t requester = MSG_task_get_data(request);
+ MSG_task_destroy(request);
+
+ XBT_DEBUG("Stop worker %s", MSG_host_get_name(requester));
msg_task_t finalize = MSG_task_create("finalize", 0, 0, FINALIZE);
- MSG_task_send(finalize, build_channel_name(channel,master_name, MSG_host_get_name(workers[i % workers_count])));
+ MSG_task_send(finalize, build_channel_name(channel, master_name, MSG_host_get_name(requester)));
}
XBT_INFO("Sent %d tasks in total!", task_num);
}
/** Worker function */
-static int worker(int argc, char *argv[])
+static int worker(int argc, char* argv[])
{
char channel[1024];
- const char *my_master = MSG_process_get_data(MSG_process_self());
+ const char* my_master = MSG_process_get_data(MSG_process_self());
build_channel_name(channel, my_master, MSG_host_get_name(MSG_host_self()));
XBT_DEBUG("Receiving on channel \"%s\"", channel);
while (1) {
/* Send a request */
+ XBT_DEBUG("Sent a request to my master on %s", my_master);
msg_task_t request = MSG_task_create("request", 0, 0, MSG_host_self());
MSG_task_send(request, my_master);
}
/** Main function */
-int main(int argc, char *argv[])
+int main(int argc, char* argv[])
{
MSG_init(&argc, argv);
- xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
- "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
+ xbt_assert(argc > 2,
+ "Usage: %s platform_file deployment_file\n"
+ "\tExample: %s msg_platform.xml msg_deployment.xml\n",
+ argv[0], argv[0]);
/* Create a simulated platform */
MSG_create_environment(argv[1]);
