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) {
75 sat_request_t request = xbt_new(s_sat_request_t,1);
77 INFO2("from_name %s // to_name %s \n",from_name,to_name);
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;
87 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat start"),&request, NULL);
91 THROW1(0,1,"%s",to_name);
92 THROW1(0,0,"%s",from_name);
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){
100 sat_request_t request = *(sat_request_t*)payload;
101 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);
112 amok_bw_saturate_begin(request->peer.name,request->peer.port,
114 request->msg_size, request->duration,
118 THROW1(0,1," can not connect %s ",((request)->peer.name));
121 free(request->peer.name);
128 * @brief Start saturating between the current process and the designated peer
130 * Note that the only way to break this function before the end of the timeout
131 * is to have a remote peer calling amok_bw_saturate_stop to this process.
133 * If duration=0, the experiment will never timeout (you then have to manually
136 * If msg_size=0, the size will be automatically computed to make sure that
137 * each of the messages occupy the connexion one second
139 void amok_bw_saturate_begin(const char* to_name,unsigned int to_port,
140 unsigned int msg_size, double duration,
141 /*out*/ double *elapsed_res, double *bw_res) {
145 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
146 gras_msg_cb_ctx_t ctx;
150 s_gras_msg_t msg_got;
152 unsigned int packet_sent=0;
153 double start,elapsed=-1; /* timer */
156 volatile int saturate_further; /* boolean in the main loop */
158 /* Negociate the saturation with the peer */
159 sat_request_t request = xbt_new(s_sat_request_t,1);
161 DEBUG2("Begin to saturate to %s:%d",to_name,to_port);
162 memset(&msg_got,0,sizeof(msg_got));
164 request->msg_size = msg_size;
165 request->duration = duration;
166 request->peer.name = NULL;
167 request->peer.port = 0;
170 /* Size autodetection on need */
174 amok_bw_test(peer_cmd,
175 0,512*1024, 512*1024, /* 512k as first guess */
176 1, /* at least one sec */
178 msg_size = request->msg_size = (int)bw;
179 DEBUG1("Saturate with packets of %d bytes",request->msg_size);
182 /* Launch the saturation */
184 ctx = gras_msg_rpc_async_call(peer_cmd, 60,
185 gras_msgtype_by_name("amok_bw_sat begin"),
188 gras_msg_rpc_async_wait(ctx,&request);
189 meas=gras_socket_client_ext( to_name, request->peer.port,
195 gras_socket_close(peer_cmd);
196 INFO2("Saturation(%s->%s) started",gras_os_myname(),to_name);
198 /* Start experiment */
199 start=gras_os_time();
203 gras_socket_meas_send(meas,120,msg_size,msg_size);
206 /* Check whether someone asked us to stop saturation */
207 saturate_further = 0;
209 gras_msg_wait_ext(0/*no wait*/,gras_msgtype_by_name("amok_bw_sat stop"),
210 NULL /* accept any sender */,
211 NULL, NULL, /* No specific filter */
214 if (e.category == timeout_error) {
216 memset(&msg_got,0,sizeof(msg_got)); /* may be overprotectiv here */
221 /* Check whether the experiment has to be terminated by now */
222 elapsed=gras_os_time()-start;
223 DEBUG3("elapsed %f duration %f (msg_size=%d)",elapsed, duration,msg_size);
225 } while (saturate_further && (duration==0 || elapsed < duration));
227 bw = ((double)(packet_sent*msg_size)) / elapsed;
230 *elapsed_res = elapsed;
234 /* If someone stopped us, inform him about the achieved bandwidth */
236 bw_res_t answer = xbt_new(s_bw_res_t,1);
237 s_gras_msg_cb_ctx_t ctx;
239 INFO3("Saturation from %s to %s stopped by %s",
240 gras_os_myname(),to_name, gras_socket_peer_name(msg_got.expe));
241 answer->timestamp=gras_os_time();
245 ctx.expeditor = msg_got.expe;
247 ctx.msgtype = msg_got.type;
249 gras_msg_rpcreturn(60,&ctx,&answer);
252 INFO4("Saturation from %s to %s elapsed after %f sec (achieving %f kb/s)",
253 gras_os_myname(),to_name,elapsed,bw/1024.0);
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){
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,
279 RETHROW0("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");
295 gras_socket_close(measMaster);
296 RETHROW0("Error during saturation handshake: %s");
299 while (saturate_further) {
301 gras_socket_meas_recv(meas,5,request->msg_size,request->msg_size);
303 saturate_further = 0;
307 INFO3("Saturation comming from %s:%d stopped on %s",
308 gras_socket_peer_name(from),gras_socket_peer_port(from),
311 gras_socket_close(meas);
312 if (gras_if_RL()) /* On SG, accepted=master */
313 gras_socket_close(measMaster);
319 * @brief Ask 'from_name:from_port' to stop any saturation experiments
320 * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
321 * @param from_port: port on which the process we are asking for an experiment is listening
322 * @param time: the duration of the experiment
323 * @param bw: the achieved bandwidth
326 void amok_bw_saturate_stop(const char* from_name,unsigned int from_port,
327 /*out*/ double *time, double *bw) {
330 gras_socket_t sock = gras_socket_client(from_name,from_port);
332 VERB2("Ask %s:%d to stop the saturation",from_name,from_port);
334 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat stop"),NULL,&answer);
336 RETHROW2("Cannot ask %s:%d to stop saturation: %s",from_name, from_port);
338 gras_socket_close(sock);
339 if (time) *time=answer->sec;
340 if (bw) *bw =answer->bw;