1 /* amok_saturate - Link saturating facilities (for ALNeM's BW testing) */
3 /* Copyright (c) 2003, 2004 Martin Quinson. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "amok/Bandwidth/bandwidth_private.h"
9 #include "gras/Msg/msg_private.h" /* FIXME: This mucks with contextes to answer RPC directly */
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_bw_sat, amok_bw,
13 "Everything concerning the SATuration part of the amok_bw module");
15 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload);
16 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload);
19 void amok_bw_sat_init(void)
21 gras_datadesc_type_t bw_res_desc = gras_datadesc_by_name("bw_res_t");
22 gras_datadesc_type_t sat_request_desc;
23 /* Build the saturation datatype descriptions */
25 sat_request_desc = gras_datadesc_struct("s_sat_request_desc_t");
26 gras_datadesc_struct_append(sat_request_desc, "peer",
27 gras_datadesc_by_name("s_xbt_peer_t"));
28 gras_datadesc_struct_append(sat_request_desc, "msg_size",
29 gras_datadesc_by_name("unsigned int"));
30 gras_datadesc_struct_append(sat_request_desc, "duration",
31 gras_datadesc_by_name("unsigned int"));
32 gras_datadesc_struct_close(sat_request_desc);
33 sat_request_desc = gras_datadesc_ref("sat_request_t", sat_request_desc);
35 /* Register the saturation messages */
36 gras_msgtype_declare_rpc("amok_bw_sat start", sat_request_desc, NULL);
37 gras_msgtype_declare_rpc("amok_bw_sat begin", sat_request_desc,
39 gras_msgtype_declare_rpc("amok_bw_sat stop", NULL, bw_res_desc);
43 void amok_bw_sat_join(void)
45 gras_cb_register("amok_bw_sat start", &amok_bw_cb_sat_start);
46 gras_cb_register("amok_bw_sat begin", &amok_bw_cb_sat_begin);
49 void amok_bw_sat_leave(void)
51 gras_cb_unregister("amok_bw_sat start", &amok_bw_cb_sat_start);
52 gras_cb_unregister("amok_bw_sat begin", &amok_bw_cb_sat_begin);
55 /* ***************************************************************************
57 * ***************************************************************************/
60 * @brief Ask 'from_name:from_port' to stop saturating going to to_name:to_name.
62 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
63 * @param from_port: port on which the process we are asking for an experiment is listening
64 * (for message, do not give a raw socket here. The needed raw socket will be negociated
66 * @param to_name: Name of the peer with which we should conduct the experiment
67 * @param to_port: port on which the peer process is listening for message
68 * @param msg_size: Size of each message sent.
69 * @param duration: How long in maximum should be the saturation.
71 * Ask the process 'from_name:from_port' to start to saturate the link between itself
72 * and to_name:to_name.
74 void amok_bw_saturate_start(const char *from_name, unsigned int from_port,
75 const char *to_name, unsigned int to_port,
76 unsigned int msg_size, double duration)
79 sat_request_t request = xbt_new(s_sat_request_t, 1);
81 VERB4("Start from_name %s:%d -> to_name %s:%d",
82 from_name, from_port, to_name, to_port);
83 sock = gras_socket_client(from_name, from_port);
85 request->peer.name = (char *) to_name;
86 request->peer.port = to_port;
88 request->duration = duration;
89 request->msg_size = msg_size;
91 gras_msg_rpccall(sock, 60, "amok_bw_sat start", &request, NULL);
94 gras_socket_close(sock);
97 /* Asked to begin a saturation */
98 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload)
100 sat_request_t request = *(sat_request_t *) payload;
101 gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
103 VERB4("Asked by %s:%d to start a saturation to %s:%d",
104 gras_socket_peer_name(expeditor), gras_socket_peer_port(expeditor),
105 request->peer.name, request->peer.port);
107 gras_msg_rpcreturn(60, ctx, NULL);
109 amok_bw_saturate_begin(request->peer.name, request->peer.port,
110 request->msg_size, request->duration, NULL, NULL);
112 free(request->peer.name);
119 * @brief Start saturating between the current process and the designated peer
121 * Note that the only way to break this function before the end of the timeout
122 * is to have a remote peer calling amok_bw_saturate_stop to this process.
124 * If duration=0, the experiment will never timeout (you then have to manually
127 * If msg_size=0, the size will be automatically computed to make sure that
128 * each of the messages occupy the connexion one second
130 void amok_bw_saturate_begin(const char *to_name, unsigned int to_port,
131 unsigned int msg_size, double duration,
132 /*out */ double *elapsed_res, double *bw_res)
137 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
138 gras_msg_cb_ctx_t ctx;
142 s_gras_msg_t msg_got;
144 unsigned int packet_sent = 0;
145 double start, elapsed = -1; /* timer */
148 volatile int saturate_further; /* boolean in the main loop */
150 /* Negociate the saturation with the peer */
151 sat_request_t request = xbt_new(s_sat_request_t, 1);
153 DEBUG2("Begin to saturate to %s:%d", to_name, to_port);
154 memset(&msg_got, 0, sizeof(msg_got));
156 request->msg_size = msg_size;
157 request->duration = duration;
158 request->peer.name = NULL;
159 request->peer.port = 0;
162 /* Size autodetection on need */
166 amok_bw_test(peer_cmd, 0, /* check buffsize yourself */
167 512 * 1024, /* 512k as first guess */
168 1, /* One packet only */
169 1, /* at least one sec */
171 msg_size = request->msg_size = (int) bw;
172 DEBUG1("Saturate with packets of %d bytes", request->msg_size);
175 /* Launch the saturation */
177 ctx = gras_msg_rpc_async_call(peer_cmd, 60, "amok_bw_sat begin", &request);
179 gras_msg_rpc_async_wait(ctx, &request);
180 meas = gras_socket_client_ext(to_name, request->peer.port,
181 0 /*bufsize: auto */ ,
186 gras_socket_close(peer_cmd);
187 INFO4("Saturation(%s:%d->%s:%d) started", gras_os_myname(),
188 gras_os_myport(), to_name, to_port);
190 /* Start experiment */
191 start = gras_os_time();
195 gras_socket_meas_send(meas, 120, msg_size, 1);
198 /* Check whether someone asked us to stop saturation */
199 saturate_further = 0;
201 gras_msg_wait_ext(0 /*no wait */ , "amok_bw_sat stop",
202 NULL /* accept any sender */ ,
203 NULL, NULL, /* No specific filter */
207 if (e.category == timeout_error) {
208 saturate_further = 1;
209 memset(&msg_got, 0, sizeof(msg_got)); /* may be overprotectiv here */
214 /* Check whether the experiment has to be terminated by now */
215 elapsed = gras_os_time() - start;
216 DEBUG3("elapsed %f duration %f (msg_size=%d)", elapsed, duration,
219 } while (saturate_further && (duration == 0 || elapsed < duration));
221 bw = ((double) (packet_sent * msg_size)) / elapsed;
224 *elapsed_res = elapsed;
228 /* If someone stopped us, inform him about the achieved bandwidth */
230 bw_res_t answer = xbt_new(s_bw_res_t, 1);
231 s_gras_msg_cb_ctx_t ctx;
233 INFO6("Saturation from %s:%d to %s:%d stopped by %s:%d",
234 gras_os_myname(), gras_os_myport(), to_name, to_port,
235 gras_socket_peer_name(msg_got.expe),
236 gras_socket_peer_port(msg_got.expe));
237 answer->timestamp = gras_os_time();
238 answer->sec = elapsed;
241 ctx.expeditor = msg_got.expe;
243 ctx.msgtype = msg_got.type;
245 gras_msg_rpcreturn(60, &ctx, &answer);
249 ("Saturation from %s:%d to %s:%d elapsed after %f sec (achieving %f kb/s)",
250 gras_os_myname(), gras_os_myport(), to_name, to_port, elapsed,
254 gras_socket_close(meas);
257 /* Sender will saturate link to us */
258 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload)
260 sat_request_t request = *(sat_request_t *) payload;
261 sat_request_t answer = xbt_new0(s_sat_request_t, 1);
262 volatile int saturate_further = 1;
264 gras_socket_t measMaster = NULL, meas = NULL;
265 gras_socket_t from = gras_msg_cb_ctx_from(ctx);
268 while (port <= 10000 && measMaster == NULL) {
270 measMaster = gras_socket_server_ext(port, 0 /*bufsize: auto */ ,
279 ("Error encountered while opening a measurement server socket: %s");
281 if (measMaster == NULL)
282 port++; /* prepare for a new loop */
284 answer->peer.port = port;
286 gras_msg_rpcreturn(60, ctx, &answer);
289 gras_os_sleep(5); /* Wait for the accept */
292 meas = gras_socket_meas_accept(measMaster);
293 DEBUG0("saturation handshake answered");
296 gras_socket_close(measMaster);
297 RETHROW0("Error during saturation handshake: %s");
300 while (saturate_further) {
302 gras_socket_meas_recv(meas, 5, request->msg_size, 1);
305 saturate_further = 0;
309 INFO4("Saturation comming from %s:%d stopped on %s:%d",
310 gras_socket_peer_name(from), gras_socket_peer_port(from),
311 gras_os_myname(), gras_os_myport());
313 gras_socket_close(meas);
314 if (gras_if_RL()) /* On SG, accepted=master */
315 gras_socket_close(measMaster);
321 * @brief Ask 'from_name:from_port' to stop any saturation experiments
322 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
323 * @param from_port: port on which the process we are asking for an experiment is listening
324 * @param time: the duration of the experiment
325 * @param bw: the achieved bandwidth
328 void amok_bw_saturate_stop(const char *from_name, unsigned int from_port,
329 /*out */ double *time, double *bw)
333 gras_socket_t sock = gras_socket_client(from_name, from_port);
335 VERB2("Ask %s:%d to stop the saturation", from_name, from_port);
337 gras_msg_rpccall(sock, 60, "amok_bw_sat stop", NULL, &answer);
339 RETHROW2("Cannot ask %s:%d to stop saturation: %s", from_name, from_port);
341 gras_socket_close(sock);