1 /* amok_saturate - Link saturating facilities (for ALNeM's BW testing) */
3 /* Copyright (c) 2004, 2005, 2006, 2007, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "amok/Bandwidth/bandwidth_private.h"
10 #include "gras/Msg/msg_private.h" /* FIXME: This mucks with contextes to answer RPC directly */
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_bw_sat, amok_bw,
14 "Everything concerning the SATuration part of the amok_bw module");
16 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload);
17 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload);
20 void amok_bw_sat_init(void)
22 gras_datadesc_type_t bw_res_desc = gras_datadesc_by_name("bw_res_t");
23 gras_datadesc_type_t sat_request_desc;
24 /* Build the saturation datatype descriptions */
26 sat_request_desc = gras_datadesc_struct("s_sat_request_desc_t");
27 gras_datadesc_struct_append(sat_request_desc, "peer",
28 gras_datadesc_by_name("s_xbt_peer_t"));
29 gras_datadesc_struct_append(sat_request_desc, "msg_size",
30 gras_datadesc_by_name("unsigned int"));
31 gras_datadesc_struct_append(sat_request_desc, "duration",
32 gras_datadesc_by_name("unsigned int"));
33 gras_datadesc_struct_close(sat_request_desc);
34 sat_request_desc = gras_datadesc_ref("sat_request_t", sat_request_desc);
36 /* Register the saturation messages */
37 gras_msgtype_declare_rpc("amok_bw_sat start", sat_request_desc, NULL);
38 gras_msgtype_declare_rpc("amok_bw_sat begin", sat_request_desc,
40 gras_msgtype_declare_rpc("amok_bw_sat stop", NULL, bw_res_desc);
44 void amok_bw_sat_join(void)
46 gras_cb_register("amok_bw_sat start", &amok_bw_cb_sat_start);
47 gras_cb_register("amok_bw_sat begin", &amok_bw_cb_sat_begin);
50 void amok_bw_sat_leave(void)
52 gras_cb_unregister("amok_bw_sat start", &amok_bw_cb_sat_start);
53 gras_cb_unregister("amok_bw_sat begin", &amok_bw_cb_sat_begin);
56 /* ***************************************************************************
58 * ***************************************************************************/
61 * @brief Ask 'from_name:from_port' to stop saturating going to to_name:to_name.
63 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
64 * @param from_port: port on which the process we are asking for an experiment is listening
65 * (for message, do not give a raw socket here. The needed raw socket will be negociated
67 * @param to_name: Name of the peer with which we should conduct the experiment
68 * @param to_port: port on which the peer process is listening for message
69 * @param msg_size: Size of each message sent.
70 * @param duration: How long in maximum should be the saturation.
72 * Ask the process 'from_name:from_port' to start to saturate the link between itself
73 * and to_name:to_name.
75 void amok_bw_saturate_start(const char *from_name, unsigned int from_port,
76 const char *to_name, unsigned int to_port,
77 unsigned int msg_size, double duration)
80 sat_request_t request = xbt_new(s_sat_request_t, 1);
82 VERB4("Start from_name %s:%d -> to_name %s:%d",
83 from_name, from_port, to_name, to_port);
84 sock = gras_socket_client(from_name, from_port);
86 request->peer.name = (char *) to_name;
87 request->peer.port = to_port;
89 request->duration = duration;
90 request->msg_size = msg_size;
92 gras_msg_rpccall(sock, 60, "amok_bw_sat start", &request, NULL);
95 gras_socket_close(sock);
98 /* Asked to begin a saturation */
99 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload)
101 sat_request_t request = *(sat_request_t *) payload;
102 gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
104 VERB4("Asked by %s:%d to start a saturation to %s:%d",
105 gras_socket_peer_name(expeditor), gras_socket_peer_port(expeditor),
106 request->peer.name, request->peer.port);
108 gras_msg_rpcreturn(60, ctx, NULL);
110 amok_bw_saturate_begin(request->peer.name, request->peer.port,
111 request->msg_size, request->duration, NULL, NULL);
113 free(request->peer.name);
120 * @brief Start saturating between the current process and the designated peer
122 * Note that the only way to break this function before the end of the timeout
123 * is to have a remote peer calling amok_bw_saturate_stop to this process.
125 * If duration=0, the experiment will never timeout (you then have to manually
128 * If msg_size=0, the size will be automatically computed to make sure that
129 * each of the messages occupy the connexion one second
131 void amok_bw_saturate_begin(const char *to_name, unsigned int to_port,
132 unsigned int msg_size, double duration,
133 /*out */ double *elapsed_res, double *bw_res)
138 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
139 gras_msg_cb_ctx_t ctx;
143 s_gras_msg_t msg_got;
145 unsigned int packet_sent = 0;
146 double start, elapsed = -1; /* timer */
149 volatile int saturate_further; /* boolean in the main loop */
151 /* Negociate the saturation with the peer */
152 sat_request_t request = xbt_new(s_sat_request_t, 1);
154 DEBUG2("Begin to saturate to %s:%d", to_name, to_port);
155 memset(&msg_got, 0, sizeof(msg_got));
157 request->msg_size = msg_size;
158 request->duration = duration;
159 request->peer.name = NULL;
160 request->peer.port = 0;
163 /* Size autodetection on need */
167 amok_bw_test(peer_cmd, 0, /* check buffsize yourself */
168 512 * 1024, /* 512k as first guess */
169 1, /* One packet only */
170 1, /* at least one sec */
172 msg_size = request->msg_size = (int) bw;
173 DEBUG1("Saturate with packets of %d bytes", request->msg_size);
176 /* Launch the saturation */
178 ctx = gras_msg_rpc_async_call(peer_cmd, 60, "amok_bw_sat begin", &request);
180 gras_msg_rpc_async_wait(ctx, &request);
181 meas = gras_socket_client_ext(to_name, request->peer.port,
182 0 /*bufsize: auto */ ,
187 gras_socket_close(peer_cmd);
188 INFO4("Saturation(%s:%d->%s:%d) started", gras_os_myname(),
189 gras_os_myport(), to_name, to_port);
191 /* Start experiment */
192 start = gras_os_time();
196 gras_socket_meas_send(meas, 120, msg_size, 1);
199 /* Check whether someone asked us to stop saturation */
200 saturate_further = 0;
202 gras_msg_wait_ext(0 /*no wait */ , "amok_bw_sat stop",
203 NULL /* accept any sender */ ,
204 NULL, NULL, /* No specific filter */
208 if (e.category == timeout_error) {
209 saturate_further = 1;
210 memset(&msg_got, 0, sizeof(msg_got)); /* may be overprotectiv here */
215 /* Check whether the experiment has to be terminated by now */
216 elapsed = gras_os_time() - start;
217 DEBUG3("elapsed %f duration %f (msg_size=%d)", elapsed, duration,
220 } while (saturate_further && (duration == 0 || elapsed < duration));
222 bw = ((double) (packet_sent * msg_size)) / elapsed;
225 *elapsed_res = elapsed;
229 /* If someone stopped us, inform him about the achieved bandwidth */
231 bw_res_t answer = xbt_new(s_bw_res_t, 1);
232 s_gras_msg_cb_ctx_t ctx;
234 INFO6("Saturation from %s:%d to %s:%d stopped by %s:%d",
235 gras_os_myname(), gras_os_myport(), to_name, to_port,
236 gras_socket_peer_name(msg_got.expe),
237 gras_socket_peer_port(msg_got.expe));
238 answer->timestamp = gras_os_time();
239 answer->sec = elapsed;
242 ctx.expeditor = msg_got.expe;
244 ctx.msgtype = msg_got.type;
246 gras_msg_rpcreturn(60, &ctx, &answer);
250 ("Saturation from %s:%d to %s:%d elapsed after %f sec (achieving %f kb/s)",
251 gras_os_myname(), gras_os_myport(), to_name, to_port, elapsed,
255 gras_socket_close(meas);
258 /* Sender will saturate link to us */
259 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload)
261 sat_request_t request = *(sat_request_t *) payload;
262 sat_request_t answer = xbt_new0(s_sat_request_t, 1);
263 volatile int saturate_further = 1;
265 gras_socket_t measMaster = NULL, meas = NULL;
266 gras_socket_t from = gras_msg_cb_ctx_from(ctx);
269 while (port <= 10000 && measMaster == NULL) {
271 measMaster = gras_socket_server_ext(port, 0 /*bufsize: auto */ ,
280 ("Error encountered while opening a measurement server socket: %s");
282 if (measMaster == NULL)
283 port++; /* prepare for a new loop */
285 answer->peer.port = port;
287 gras_msg_rpcreturn(60, ctx, &answer);
290 gras_os_sleep(5); /* Wait for the accept */
293 meas = gras_socket_meas_accept(measMaster);
294 DEBUG0("saturation handshake answered");
297 gras_socket_close(measMaster);
298 RETHROW0("Error during saturation handshake: %s");
301 while (saturate_further) {
303 gras_socket_meas_recv(meas, 5, request->msg_size, 1);
306 saturate_further = 0;
310 INFO4("Saturation comming from %s:%d stopped on %s:%d",
311 gras_socket_peer_name(from), gras_socket_peer_port(from),
312 gras_os_myname(), gras_os_myport());
314 gras_socket_close(meas);
315 if (gras_if_RL()) /* On SG, accepted=master */
316 gras_socket_close(measMaster);
322 * @brief Ask 'from_name:from_port' to stop any saturation experiments
323 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
324 * @param from_port: port on which the process we are asking for an experiment is listening
325 * @param time: the duration of the experiment
326 * @param bw: the achieved bandwidth
329 void amok_bw_saturate_stop(const char *from_name, unsigned int from_port,
330 /*out */ double *time, double *bw)
334 gras_socket_t sock = gras_socket_client(from_name, from_port);
336 VERB2("Ask %s:%d to stop the saturation", from_name, from_port);
338 gras_msg_rpccall(sock, 60, "amok_bw_sat stop", NULL, &answer);
340 RETHROW2("Cannot ask %s:%d to stop saturation: %s", from_name, from_port);
342 gras_socket_close(sock);