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,"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) {
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",gras_datadesc_by_name("s_xbt_peer_t"));
27 gras_datadesc_struct_append(sat_request_desc,"msg_size",gras_datadesc_by_name("unsigned int"));
28 gras_datadesc_struct_append(sat_request_desc,"duration",gras_datadesc_by_name("unsigned int"));
29 gras_datadesc_struct_close(sat_request_desc);
30 sat_request_desc = gras_datadesc_ref("sat_request_t",sat_request_desc);
32 /* Register the saturation messages */
33 gras_msgtype_declare_rpc("amok_bw_sat start", sat_request_desc, NULL);
34 gras_msgtype_declare_rpc("amok_bw_sat begin", sat_request_desc, sat_request_desc);
35 gras_msgtype_declare_rpc("amok_bw_sat stop", NULL, bw_res_desc);
38 void amok_bw_sat_join(void) {
39 gras_cb_register(gras_msgtype_by_name("amok_bw_sat start"),
40 &amok_bw_cb_sat_start);
41 gras_cb_register(gras_msgtype_by_name("amok_bw_sat begin"),
42 &amok_bw_cb_sat_begin);
44 void amok_bw_sat_leave(void) {
45 gras_cb_unregister(gras_msgtype_by_name("amok_bw_sat start"),
46 &amok_bw_cb_sat_start);
47 gras_cb_unregister(gras_msgtype_by_name("amok_bw_sat begin"),
48 &amok_bw_cb_sat_begin);
51 /* ***************************************************************************
53 * ***************************************************************************/
56 * @brief Ask 'from_name:from_port' to stop saturating going to to_name:to_name.
58 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
59 * @param from_port: port on which the process we are asking for an experiment is listening
60 * (for message, do not give a raw socket here. The needed raw socket will be negociated
62 * @param to_name: Name of the peer with which we should conduct the experiment
63 * @param to_port: port on which the peer process is listening for message
64 * @param msg_size: Size of each message sent.
65 * @param duration: How long in maximum should be the saturation.
67 * Ask the process 'from_name:from_port' to start to saturate the link between itself
68 * and to_name:to_name.
70 void amok_bw_saturate_start(const char* from_name,unsigned int from_port,
71 const char* to_name,unsigned int to_port,
72 unsigned int msg_size, double duration) {
74 sat_request_t request = xbt_new(s_sat_request_t,1);
76 VERB4("Start from_name %s:%d -> to_name %s:%d",
77 from_name, from_port, to_name, to_port);
78 sock = gras_socket_client(from_name,from_port);
80 request->peer.name = (char*)to_name;
81 request->peer.port = to_port;
83 request->duration=duration;
84 request->msg_size=msg_size;
86 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat start"),&request, NULL);
89 gras_socket_close(sock);
92 /* Asked to begin a saturation */
93 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload){
94 sat_request_t request = *(sat_request_t*)payload;
95 gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
97 VERB4("Asked by %s:%d to start a saturation to %s:%d",
98 gras_socket_peer_name(expeditor),gras_socket_peer_port(expeditor),
99 request->peer.name,request->peer.port);
101 gras_msg_rpcreturn(60,ctx, NULL);
103 amok_bw_saturate_begin(request->peer.name,request->peer.port,
105 request->msg_size, request->duration,
108 free(request->peer.name);
115 * @brief Start saturating between the current process and the designated peer
117 * Note that the only way to break this function before the end of the timeout
118 * is to have a remote peer calling amok_bw_saturate_stop to this process.
120 * If duration=0, the experiment will never timeout (you then have to manually
123 * If msg_size=0, the size will be automatically computed to make sure that
124 * each of the messages occupy the connexion one second
126 void amok_bw_saturate_begin(const char* to_name,unsigned int to_port,
127 unsigned int msg_size, double duration,
128 /*out*/ double *elapsed_res, double *bw_res) {
132 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
133 gras_msg_cb_ctx_t ctx;
137 s_gras_msg_t msg_got;
139 unsigned int packet_sent=0;
140 double start,elapsed=-1; /* timer */
143 volatile int saturate_further; /* boolean in the main loop */
145 /* Negociate the saturation with the peer */
146 sat_request_t request = xbt_new(s_sat_request_t,1);
148 DEBUG2("Begin to saturate to %s:%d",to_name,to_port);
149 memset(&msg_got,0,sizeof(msg_got));
151 request->msg_size = msg_size;
152 request->duration = duration;
153 request->peer.name = NULL;
154 request->peer.port = 0;
157 /* Size autodetection on need */
161 amok_bw_test(peer_cmd,
162 0, /* check buffsize yourself */
163 512*1024, /* 512k as first guess */
164 1, /* One packet only */
165 1, /* at least one sec */
167 msg_size = request->msg_size = (int)bw;
168 DEBUG1("Saturate with packets of %d bytes",request->msg_size);
171 /* Launch the saturation */
173 ctx = gras_msg_rpc_async_call(peer_cmd, 60,
174 gras_msgtype_by_name("amok_bw_sat begin"),
177 gras_msg_rpc_async_wait(ctx,&request);
178 meas=gras_socket_client_ext( to_name, request->peer.port,
184 gras_socket_close(peer_cmd);
185 INFO4("Saturation(%s:%d->%s:%d) started",gras_os_myname(),gras_os_myport(),to_name,to_port);
187 /* Start experiment */
188 start=gras_os_time();
192 gras_socket_meas_send(meas, 120, msg_size, 1);
195 /* Check whether someone asked us to stop saturation */
196 saturate_further = 0;
198 gras_msg_wait_ext(0/*no wait*/,gras_msgtype_by_name("amok_bw_sat stop"),
199 NULL /* accept any sender */,
200 NULL, NULL, /* No specific filter */
203 if (e.category == timeout_error) {
205 memset(&msg_got,0,sizeof(msg_got)); /* may be overprotectiv here */
210 /* Check whether the experiment has to be terminated by now */
211 elapsed=gras_os_time()-start;
212 DEBUG3("elapsed %f duration %f (msg_size=%d)",elapsed, duration,msg_size);
214 } while (saturate_further && (duration==0 || elapsed < duration));
216 bw = ((double)(packet_sent*msg_size)) / elapsed;
219 *elapsed_res = elapsed;
223 /* If someone stopped us, inform him about the achieved bandwidth */
225 bw_res_t answer = xbt_new(s_bw_res_t,1);
226 s_gras_msg_cb_ctx_t ctx;
228 INFO6("Saturation from %s:%d to %s:%d stopped by %s:%d",
229 gras_os_myname(),gras_os_myport(),to_name,to_port, gras_socket_peer_name(msg_got.expe),gras_socket_peer_port(msg_got.expe));
230 answer->timestamp=gras_os_time();
234 ctx.expeditor = msg_got.expe;
236 ctx.msgtype = msg_got.type;
238 gras_msg_rpcreturn(60,&ctx,&answer);
241 INFO6("Saturation from %s:%d to %s:%d elapsed after %f sec (achieving %f kb/s)",
242 gras_os_myname(),gras_os_myport(),to_name,to_port,elapsed,bw/1024.0);
245 gras_socket_close(meas);
248 /* Sender will saturate link to us */
249 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload){
250 sat_request_t request=*(sat_request_t*)payload;
251 sat_request_t answer=xbt_new0(s_sat_request_t,1);
252 volatile int saturate_further = 1;
254 gras_socket_t measMaster=NULL,meas=NULL;
255 gras_socket_t from=gras_msg_cb_ctx_from(ctx);
258 while (port <= 10000 && measMaster == NULL) {
260 measMaster = gras_socket_server_ext(port,
268 RETHROW0("Error encountered while opening a measurement server socket: %s");
270 if (measMaster == NULL)
271 port++; /* prepare for a new loop */
273 answer->peer.port=port;
275 gras_msg_rpcreturn(60, ctx, &answer);
278 gras_os_sleep(5); /* Wait for the accept */
281 meas = gras_socket_meas_accept(measMaster);
282 DEBUG0("saturation handshake answered");
284 gras_socket_close(measMaster);
285 RETHROW0("Error during saturation handshake: %s");
288 while (saturate_further) {
290 gras_socket_meas_recv(meas, 5, request->msg_size, 1);
292 saturate_further = 0;
296 INFO4("Saturation comming from %s:%d stopped on %s:%d",
297 gras_socket_peer_name(from),gras_socket_peer_port(from),
298 gras_os_myname(),gras_os_myport());
300 gras_socket_close(meas);
301 if (gras_if_RL()) /* On SG, accepted=master */
302 gras_socket_close(measMaster);
308 * @brief Ask 'from_name:from_port' to stop any saturation experiments
309 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
310 * @param from_port: port on which the process we are asking for an experiment is listening
311 * @param time: the duration of the experiment
312 * @param bw: the achieved bandwidth
315 void amok_bw_saturate_stop(const char* from_name,unsigned int from_port,
316 /*out*/ double *time, double *bw) {
319 gras_socket_t sock = gras_socket_client(from_name,from_port);
321 VERB2("Ask %s:%d to stop the saturation",from_name,from_port);
323 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat stop"),NULL,&answer);
325 RETHROW2("Cannot ask %s:%d to stop saturation: %s",from_name, from_port);
327 gras_socket_close(sock);
328 if (time) *time=answer->sec;
329 if (bw) *bw =answer->bw;