3 /* amok_saturate - Link saturating facilities (for ALNeM's BW testing) */
5 /* Copyright (c) 2003, 2004 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "amok/Bandwidth/bandwidth_private.h"
11 #include "gras/Msg/msg_private.h" /* FIXME: This mucks with contextes to answer RPC directly */
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_bw_sat, amok_bw,
15 "Everything concerning the SATuration part of the amok_bw module");
17 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload);
18 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload);
21 void amok_bw_sat_init(void)
23 gras_datadesc_type_t bw_res_desc = gras_datadesc_by_name("bw_res_t");
24 gras_datadesc_type_t sat_request_desc;
25 /* Build the saturation datatype descriptions */
27 sat_request_desc = gras_datadesc_struct("s_sat_request_desc_t");
28 gras_datadesc_struct_append(sat_request_desc, "peer",
29 gras_datadesc_by_name("s_xbt_peer_t"));
30 gras_datadesc_struct_append(sat_request_desc, "msg_size",
31 gras_datadesc_by_name("unsigned int"));
32 gras_datadesc_struct_append(sat_request_desc, "duration",
33 gras_datadesc_by_name("unsigned int"));
34 gras_datadesc_struct_close(sat_request_desc);
35 sat_request_desc = gras_datadesc_ref("sat_request_t", sat_request_desc);
37 /* Register the saturation messages */
38 gras_msgtype_declare_rpc("amok_bw_sat start", sat_request_desc, NULL);
39 gras_msgtype_declare_rpc("amok_bw_sat begin", sat_request_desc,
41 gras_msgtype_declare_rpc("amok_bw_sat stop", NULL, bw_res_desc);
45 void amok_bw_sat_join(void)
47 gras_cb_register("amok_bw_sat start", &amok_bw_cb_sat_start);
48 gras_cb_register("amok_bw_sat begin", &amok_bw_cb_sat_begin);
51 void amok_bw_sat_leave(void)
53 gras_cb_unregister("amok_bw_sat start", &amok_bw_cb_sat_start);
54 gras_cb_unregister("amok_bw_sat begin", &amok_bw_cb_sat_begin);
57 /* ***************************************************************************
59 * ***************************************************************************/
62 * @brief Ask 'from_name:from_port' to stop saturating going to to_name:to_name.
64 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
65 * @param from_port: port on which the process we are asking for an experiment is listening
66 * (for message, do not give a raw socket here. The needed raw socket will be negociated
68 * @param to_name: Name of the peer with which we should conduct the experiment
69 * @param to_port: port on which the peer process is listening for message
70 * @param msg_size: Size of each message sent.
71 * @param duration: How long in maximum should be the saturation.
73 * Ask the process 'from_name:from_port' to start to saturate the link between itself
74 * and to_name:to_name.
76 void amok_bw_saturate_start(const char *from_name, unsigned int from_port,
77 const char *to_name, unsigned int to_port,
78 unsigned int msg_size, double duration)
81 sat_request_t request = xbt_new(s_sat_request_t, 1);
83 VERB4("Start from_name %s:%d -> to_name %s:%d",
84 from_name, from_port, to_name, to_port);
85 sock = gras_socket_client(from_name, from_port);
87 request->peer.name = (char *) to_name;
88 request->peer.port = to_port;
90 request->duration = duration;
91 request->msg_size = msg_size;
93 gras_msg_rpccall(sock, 60, "amok_bw_sat start", &request, NULL);
96 gras_socket_close(sock);
99 /* Asked to begin a saturation */
100 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload)
102 sat_request_t request = *(sat_request_t *) payload;
103 gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
105 VERB4("Asked by %s:%d to start a saturation to %s:%d",
106 gras_socket_peer_name(expeditor), gras_socket_peer_port(expeditor),
107 request->peer.name, request->peer.port);
109 gras_msg_rpcreturn(60, ctx, NULL);
111 amok_bw_saturate_begin(request->peer.name, request->peer.port,
112 request->msg_size, request->duration, NULL, NULL);
114 free(request->peer.name);
121 * @brief Start saturating between the current process and the designated peer
123 * Note that the only way to break this function before the end of the timeout
124 * is to have a remote peer calling amok_bw_saturate_stop to this process.
126 * If duration=0, the experiment will never timeout (you then have to manually
129 * If msg_size=0, the size will be automatically computed to make sure that
130 * each of the messages occupy the connexion one second
132 void amok_bw_saturate_begin(const char *to_name, unsigned int to_port,
133 unsigned int msg_size, double duration,
134 /*out */ double *elapsed_res, double *bw_res)
139 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
140 gras_msg_cb_ctx_t ctx;
144 s_gras_msg_t msg_got;
146 unsigned int packet_sent = 0;
147 double start, elapsed = -1; /* timer */
150 volatile int saturate_further; /* boolean in the main loop */
152 /* Negociate the saturation with the peer */
153 sat_request_t request = xbt_new(s_sat_request_t, 1);
155 DEBUG2("Begin to saturate to %s:%d", to_name, to_port);
156 memset(&msg_got, 0, sizeof(msg_got));
158 request->msg_size = msg_size;
159 request->duration = duration;
160 request->peer.name = NULL;
161 request->peer.port = 0;
164 /* Size autodetection on need */
168 amok_bw_test(peer_cmd, 0, /* check buffsize yourself */
169 512 * 1024, /* 512k as first guess */
170 1, /* One packet only */
171 1, /* at least one sec */
173 msg_size = request->msg_size = (int) bw;
174 DEBUG1("Saturate with packets of %d bytes", request->msg_size);
177 /* Launch the saturation */
179 ctx = gras_msg_rpc_async_call(peer_cmd, 60, "amok_bw_sat begin", &request);
181 gras_msg_rpc_async_wait(ctx, &request);
182 meas = gras_socket_client_ext(to_name, request->peer.port,
183 0 /*bufsize: auto */ ,
188 gras_socket_close(peer_cmd);
189 INFO4("Saturation(%s:%d->%s:%d) started", gras_os_myname(),
190 gras_os_myport(), to_name, to_port);
192 /* Start experiment */
193 start = gras_os_time();
197 gras_socket_meas_send(meas, 120, msg_size, 1);
200 /* Check whether someone asked us to stop saturation */
201 saturate_further = 0;
203 gras_msg_wait_ext(0 /*no wait */ , "amok_bw_sat stop",
204 NULL /* accept any sender */ ,
205 NULL, NULL, /* No specific filter */
209 if (e.category == timeout_error) {
210 saturate_further = 1;
211 memset(&msg_got, 0, sizeof(msg_got)); /* may be overprotectiv here */
216 /* Check whether the experiment has to be terminated by now */
217 elapsed = gras_os_time() - start;
218 DEBUG3("elapsed %f duration %f (msg_size=%d)", elapsed, duration,
221 } while (saturate_further && (duration == 0 || elapsed < duration));
223 bw = ((double) (packet_sent * msg_size)) / elapsed;
226 *elapsed_res = elapsed;
230 /* If someone stopped us, inform him about the achieved bandwidth */
232 bw_res_t answer = xbt_new(s_bw_res_t, 1);
233 s_gras_msg_cb_ctx_t ctx;
235 INFO6("Saturation from %s:%d to %s:%d stopped by %s:%d",
236 gras_os_myname(), gras_os_myport(), to_name, to_port,
237 gras_socket_peer_name(msg_got.expe),
238 gras_socket_peer_port(msg_got.expe));
239 answer->timestamp = gras_os_time();
240 answer->sec = elapsed;
243 ctx.expeditor = msg_got.expe;
245 ctx.msgtype = msg_got.type;
247 gras_msg_rpcreturn(60, &ctx, &answer);
251 ("Saturation from %s:%d to %s:%d elapsed after %f sec (achieving %f kb/s)",
252 gras_os_myname(), gras_os_myport(), to_name, to_port, elapsed,
256 gras_socket_close(meas);
259 /* Sender will saturate link to us */
260 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload)
262 sat_request_t request = *(sat_request_t *) payload;
263 sat_request_t answer = xbt_new0(s_sat_request_t, 1);
264 volatile int saturate_further = 1;
266 gras_socket_t measMaster = NULL, meas = NULL;
267 gras_socket_t from = gras_msg_cb_ctx_from(ctx);
270 while (port <= 10000 && measMaster == NULL) {
272 measMaster = gras_socket_server_ext(port, 0 /*bufsize: auto */ ,
281 ("Error encountered while opening a measurement server socket: %s");
283 if (measMaster == NULL)
284 port++; /* prepare for a new loop */
286 answer->peer.port = port;
288 gras_msg_rpcreturn(60, ctx, &answer);
291 gras_os_sleep(5); /* Wait for the accept */
294 meas = gras_socket_meas_accept(measMaster);
295 DEBUG0("saturation handshake answered");
298 gras_socket_close(measMaster);
299 RETHROW0("Error during saturation handshake: %s");
302 while (saturate_further) {
304 gras_socket_meas_recv(meas, 5, request->msg_size, 1);
307 saturate_further = 0;
311 INFO4("Saturation comming from %s:%d stopped on %s:%d",
312 gras_socket_peer_name(from), gras_socket_peer_port(from),
313 gras_os_myname(), gras_os_myport());
315 gras_socket_close(meas);
316 if (gras_if_RL()) /* On SG, accepted=master */
317 gras_socket_close(measMaster);
323 * @brief Ask 'from_name:from_port' to stop any saturation experiments
324 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
325 * @param from_port: port on which the process we are asking for an experiment is listening
326 * @param time: the duration of the experiment
327 * @param bw: the achieved bandwidth
330 void amok_bw_saturate_stop(const char *from_name, unsigned int from_port,
331 /*out */ double *time, double *bw)
335 gras_socket_t sock = gras_socket_client(from_name, from_port);
337 VERB2("Ask %s:%d to stop the saturation", from_name, from_port);
339 gras_msg_rpccall(sock, 60, "amok_bw_sat stop", NULL, &answer);
341 RETHROW2("Cannot ask %s:%d to stop saturation: %s", from_name, from_port);
343 gras_socket_close(sock);