Rename an example: I'm always looking for a simple comm example, so here it is

[simgrid.git] / examples / c / comm-pingpong / comm-pingpong.c

diff --git a/examples/c/comm-pingpong/comm-pingpong.c b/examples/c/comm-pingpong/comm-pingpong.c
new file mode 100644 (file)
index 0000000..c68e4f0
--- /dev/null
+++ b/examples/c/comm-pingpong/comm-pingpong.c
@@ -0,0 +1,80 @@
+/* Copyright (c) 2007-2021. 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/comm.h"
+#include "simgrid/engine.h"
+#include "simgrid/forward.h"
+#include "simgrid/mailbox.h"
+#include "xbt/asserts.h"
+#include "xbt/log.h"
+#include "xbt/str.h"
+
+#include <stdio.h> /* snprintf */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(app_pingpong, "Messages specific for this example");
+
+static void pinger(int argc, char* argv[])
+{
+  sg_mailbox_t mailbox_in  = sg_mailbox_by_name("Mailbox 1");
+  sg_mailbox_t mailbox_out = sg_mailbox_by_name("Mailbox 2");
+
+  XBT_INFO("Ping from mailbox %s to mailbox %s", sg_mailbox_get_name(mailbox_in), sg_mailbox_get_name(mailbox_out));
+
+  /* - Do the ping with a 1-Byte task (latency bound) ... */
+  double* now = (double*)xbt_malloc(sizeof(double));
+  *now        = simgrid_get_clock();
+  sg_mailbox_put(mailbox_out, now, 1);
+
+  /* - ... then wait for the (large) pong */
+  double* sender_time = (double*)sg_mailbox_get(mailbox_in);
+
+  double communication_time = simgrid_get_clock() - *sender_time;
+  XBT_INFO("Task received : large communication (bandwidth bound)");
+  XBT_INFO("Pong time (bandwidth bound): %.3f", communication_time);
+  xbt_free(sender_time);
+}
+
+static void ponger(int argc, char* argv[])
+{
+  sg_mailbox_t mailbox_in  = sg_mailbox_by_name("Mailbox 2");
+  sg_mailbox_t mailbox_out = sg_mailbox_by_name("Mailbox 1");
+
+  XBT_INFO("Pong from mailbox %s to mailbox %s", sg_mailbox_get_name(mailbox_in), sg_mailbox_get_name(mailbox_out));
+
+  /* - Receive the (small) ping first ....*/
+  double* sender_time       = (double*)sg_mailbox_get(mailbox_in);
+  double communication_time = simgrid_get_clock() - *sender_time;
+  XBT_INFO("Task received : small communication (latency bound)");
+  XBT_INFO(" Ping time (latency bound) %f", communication_time);
+  xbt_free(sender_time);
+
+  /*  - ... Then send a 1GB pong back (bandwidth bound) */
+  double* payload = (double*)xbt_malloc(sizeof(double));
+  *payload        = simgrid_get_clock();
+  XBT_INFO("task_bw->data = %.3f", *payload);
+  sg_mailbox_put(mailbox_out, payload, 1e9);
+}
+
+int main(int argc, char* argv[])
+{
+  simgrid_init(&argc, argv);
+  xbt_assert(argc > 2,
+             "Usage: %s platform_file deployment_file\n"
+             "\tExample: %s ../../platforms/small_platform.xml app-pingpong_d.xml\n",
+             argv[0], argv[0]);
+
+  simgrid_load_platform(argv[1]);
+
+  simgrid_register_function("pinger", pinger);
+  simgrid_register_function("ponger", ponger);
+  simgrid_load_deployment(argv[2]);
+
+  simgrid_run();
+
+  XBT_INFO("Total simulation time: %.3f", simgrid_get_clock());
+
+  return 0;
+}