1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/* Copyright (c) 2010-2025. 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/actor.h"
#include "simgrid/engine.h"
#include "simgrid/forward.h"
#include "simgrid/mailbox.h"
#include "xbt/log.h"
#include "xbt/str.h"
#include "xbt/sysdep.h"
#define FINALIZE 221297 /* a magic number to tell people to stop working */
#include <stdio.h> /* snprintf */
XBT_LOG_NEW_DEFAULT_CATEGORY(app_masterworker, "Messages specific for this example");
/* Main function of the master actor */
static void master(int argc, char* argv[])
{
xbt_assert(argc == 5, "The master function expects 4 arguments from the XML deployment file");
long number_of_tasks = xbt_str_parse_int(argv[1], "Invalid amount of tasks"); /* - Number of tasks */
double comp_size = xbt_str_parse_double(argv[2], "Invalid computational size"); /* - Compute cost */
long comm_size = xbt_str_parse_int(argv[3], "Invalid communication size"); /* - Communication size */
long workers_count = xbt_str_parse_int(argv[4], "Invalid amount of workers"); /* - Number of workers */
XBT_INFO("Got %ld workers and %ld tasks to process", workers_count, number_of_tasks);
for (int i = 0; i < number_of_tasks; i++) { /* For each task to be executed: */
char mailbox_name[80];
char task_name[80];
double* payload = xbt_malloc(sizeof(double));
snprintf(mailbox_name, 79, "worker-%ld", i % workers_count); /* - Select a @ref worker in a round-robin way */
snprintf(task_name, 79, "Task_%d", i);
sg_mailbox_t mailbox = sg_mailbox_by_name(mailbox_name);
*payload = comp_size;
if (number_of_tasks < 10000 || i % 10000 == 0)
XBT_INFO("Sending \"%s\" (of %ld) to mailbox \"%s\"", task_name, number_of_tasks, mailbox_name);
sg_mailbox_put(mailbox, payload, comm_size); /* - Send the amount of flops to compute to the @ref worker */
}
XBT_INFO("All tasks have been dispatched. Let's tell everybody the computation is over.");
for (int i = 0; i < workers_count; i++) { /* - Eventually tell all the workers to stop by sending a "finalize" task */
char mailbox_name[80];
snprintf(mailbox_name, 79, "worker-%ld", i % workers_count);
double* payload = xbt_malloc(sizeof(double));
sg_mailbox_t mailbox = sg_mailbox_by_name(mailbox_name);
*payload = FINALIZE;
sg_mailbox_put(mailbox, payload, 0);
}
}
/* Main functions of the Worker actors */
static void worker(int argc, char* argv[])
{
xbt_assert(argc == 2,
"The worker expects a single argument from the XML deployment file: its worker ID (its numerical rank)");
char mailbox_name[80];
long id = xbt_str_parse_int(argv[1], "Invalid argument");
snprintf(mailbox_name, 79, "worker-%ld", id);
sg_mailbox_t mailbox = sg_mailbox_by_name(mailbox_name);
while (1) { /* The worker wait in an infinite loop for tasks sent by the @ref master */
double* payload = (double*)sg_mailbox_get(mailbox);
if (*payload == FINALIZE) {
xbt_free(payload); /* - Exit if 'finalize' is received */
break;
}
sg_actor_execute(*payload); /* - Otherwise, process the received number of flops*/
xbt_free(payload);
}
XBT_INFO("I'm done. See you!");
}
int main(int argc, char* argv[])
{
simgrid_init(&argc, argv);
xbt_assert(argc > 2,
"Usage: %s platform_file deployment_file\n"
"\tExample: %s platform.xml deployment.xml\n",
argv[0], argv[0]);
simgrid_load_platform(argv[1]); /* - Load the platform description */
simgrid_register_function("master", master); /* - Register the function to be executed by the actors */
simgrid_register_function("worker", worker);
simgrid_load_deployment(argv[2]); /* - Deploy the application */
simgrid_run(); /* - Run the simulation */
XBT_INFO("Simulation time %g", simgrid_get_clock());
return 0;
}
|
