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 */
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_bw_sat,amok_bw,"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) {
20 gras_datadesc_type_t bw_res_desc=gras_datadesc_by_name("bw_res_t");
21 gras_datadesc_type_t sat_request_desc;
22 /* Build the saturation datatype descriptions */
24 sat_request_desc = gras_datadesc_struct("s_sat_request_desc_t");
25 gras_datadesc_struct_append(sat_request_desc,"host",gras_datadesc_by_name("s_xbt_host_t"));
26 gras_datadesc_struct_append(sat_request_desc,"msg_size",gras_datadesc_by_name("unsigned int"));
27 gras_datadesc_struct_append(sat_request_desc,"duration",gras_datadesc_by_name("unsigned int"));
28 gras_datadesc_struct_close(sat_request_desc);
29 sat_request_desc = gras_datadesc_ref("sat_request_t",sat_request_desc);
31 /* Register the saturation messages */
32 gras_msgtype_declare_rpc("amok_bw_sat start", sat_request_desc, NULL);
33 gras_msgtype_declare_rpc("amok_bw_sat begin", sat_request_desc, sat_request_desc);
34 gras_msgtype_declare_rpc("amok_bw_sat stop", NULL, bw_res_desc);
37 void amok_bw_sat_join(void) {
38 gras_cb_register(gras_msgtype_by_name("amok_bw_sat start"),
39 &amok_bw_cb_sat_start);
40 gras_cb_register(gras_msgtype_by_name("amok_bw_sat begin"),
41 &amok_bw_cb_sat_begin);
43 void amok_bw_sat_leave(void) {
44 gras_cb_unregister(gras_msgtype_by_name("amok_bw_sat start"),
45 &amok_bw_cb_sat_start);
46 gras_cb_unregister(gras_msgtype_by_name("amok_bw_sat begin"),
47 &amok_bw_cb_sat_begin);
50 /* ***************************************************************************
52 * ***************************************************************************/
55 * @brief Ask 'from_name:from_port' to stop saturating going to to_name:to_name.
57 * @param from_name: Name of the host we are asking to do a experiment with (to_name:to_port)
58 * @param from_port: port on which the process we are asking for an experiment is listening
59 * (for message, do not give a raw socket here. The needed raw socket will be negociated
61 * @param to_name: Name of the host with which we should conduct the experiment
62 * @param to_port: port on which the peer process is listening for message
63 * @param msg_size: Size of each message sent.
64 * @param duration: How long in maximum should be the saturation.
66 * Ask the process 'from_name:from_port' to start to saturate the link between itself
67 * and to_name:to_name.
69 void amok_bw_saturate_start(const char* from_name,unsigned int from_port,
70 const char* to_name,unsigned int to_port,
71 unsigned int msg_size, double duration) {
74 sat_request_t request = xbt_new(s_sat_request_t,1);
76 sock = gras_socket_client(from_name,from_port);
78 request->host.name = (char*)to_name;
79 request->host.port = to_port;
81 request->duration=duration;
82 request->msg_size=msg_size;
85 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat start"),&request, NULL);
88 gras_socket_close(sock);
91 /* Asked to begin a saturation */
92 static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload){
93 sat_request_t request = *(sat_request_t*)payload;
94 gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
96 VERB4("Asked by %s:%d to start a saturation to %s:%d",
97 gras_socket_peer_name(expeditor),gras_socket_peer_port(expeditor),
98 request->host.name,request->host.port);
100 gras_msg_rpcreturn(60,ctx, NULL);
101 amok_bw_saturate_begin(request->host.name,request->host.port,
102 request->msg_size, request->duration,
104 free(request->host.name);
110 * @brief Start saturating between the current process and the designated peer
112 * Note that the only way to break this function before the end of the timeout
113 * is to have a remote host calling amok_bw_saturate_stop to this process.
115 * If duration=0, the experiment will never timeout (you then have to manually
118 * If msg_size=0, the size will be automatically computed to make sure that
119 * each of the messages occupy the connexion one second
121 void amok_bw_saturate_begin(const char* to_name,unsigned int to_port,
122 unsigned int msg_size, double duration,
123 /*out*/ double *elapsed_res, double *bw_res) {
127 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
128 gras_msg_cb_ctx_t ctx;
132 s_gras_msg_t msg_got;
134 unsigned int packet_sent=0;
135 double start,elapsed=-1; /* timer */
138 volatile int saturate_further; /* boolean in the main loop */
140 /* Negociate the saturation with the peer */
141 sat_request_t request = xbt_new(s_sat_request_t,1);
143 DEBUG2("Begin to saturate to %s:%d",to_name,to_port);
144 memset(&msg_got,0,sizeof(msg_got));
146 request->msg_size = msg_size;
147 request->duration = duration;
148 request->host.name = NULL;
149 request->host.port = 0;
151 /* Size autodetection on need */
155 amok_bw_test(peer_cmd,
156 0,512*1024, 512*1024, /* 512k as first guess */
157 1, /* at least one sec */
159 request->msg_size = (int)bw;
162 /* Launch the saturation */
163 ctx = gras_msg_rpc_async_call(peer_cmd, 60,
164 gras_msgtype_by_name("amok_bw_sat begin"),
167 gras_msg_rpc_async_wait(ctx,&request);
168 meas=gras_socket_client_ext( to_name, request->host.port,
173 gras_socket_close(peer_cmd);
174 INFO2("Saturation(%s->%s) started",gras_os_myname(),to_name);
176 /* Start experiment */
177 start=gras_os_time();
181 gras_socket_meas_send(meas,120,msg_size,msg_size);
184 /* Check whether someone asked us to stop saturation */
185 saturate_further = 0;
187 gras_msg_wait_ext(0/*no wait*/,gras_msgtype_by_name("amok_bw_sat stop"),
188 NULL /* accept any sender */,
189 NULL, NULL, /* No specific filter */
192 if (e.category == timeout_error) {
194 memset(&msg_got,0,sizeof(msg_got)); /* may be overprotectiv here */
199 /* Check whether the experiment has to be terminated by now */
200 elapsed=gras_os_time()-start;
201 DEBUG2("elapsed %f duration %f",elapsed, duration);
203 } while (saturate_further && (duration==0 || elapsed < duration));
205 bw = ((double)(packet_sent*msg_size)) / elapsed;
208 *elapsed_res = elapsed;
212 /* If someone stopped us, inform him about the achieved bandwidth */
214 bw_res_t answer = xbt_new(s_bw_res_t,1);
215 s_gras_msg_cb_ctx_t ctx;
217 INFO3("Saturation from %s to %s stopped by %s",
218 gras_os_myname(),to_name, gras_socket_peer_name(msg_got.expe));
219 answer->timestamp=gras_os_time();
223 ctx.expeditor = msg_got.expe;
225 ctx.msgtype = msg_got.type;
227 gras_msg_rpcreturn(60,&ctx,&answer);
230 INFO4("Saturation from %s to %s elapsed after %f sec (achieving %f kb/s)",
231 gras_os_myname(),to_name,elapsed,bw/1024.0);
234 gras_socket_close(meas);
237 /* Sender will saturate link to us */
238 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload){
239 sat_request_t request=*(sat_request_t*)payload;
240 sat_request_t answer=xbt_new0(s_sat_request_t,1);
241 volatile int saturate_further = 1;
243 gras_socket_t measMaster=NULL,meas=NULL;
244 gras_socket_t from=gras_msg_cb_ctx_from(ctx);
247 while (port <= 10000 && measMaster == NULL) {
249 measMaster = gras_socket_server_ext(port,
257 RETHROW0("Error encountered while opening a measurement server socket: %s");
259 if (measMaster == NULL)
260 port++; /* prepare for a new loop */
262 answer->host.port=port;
264 gras_msg_rpcreturn(60, ctx, &answer);
267 gras_os_sleep(5); /* Wait for the accept */
270 meas = gras_socket_meas_accept(measMaster);
271 DEBUG0("saturation handshake answered");
273 gras_socket_close(measMaster);
274 RETHROW0("Error during saturation handshake: %s");
277 while (saturate_further) {
279 gras_socket_meas_recv(meas,5,request->msg_size,request->msg_size);
281 saturate_further = 0;
285 INFO3("Saturation comming from %s:%d stopped on %s",
286 gras_socket_peer_name(from),gras_socket_peer_port(from),
289 gras_socket_close(meas);
290 if (gras_if_RL()) /* On SG, accepted=master */
291 gras_socket_close(measMaster);
297 * @brief Ask 'from_name:from_port' to stop any saturation experiments
298 * @param from_name: Name of the host we are asking to do a experiment with (to_name:to_port)
299 * @param from_port: port on which the process we are asking for an experiment is listening
300 * @param time: the duration of the experiment
301 * @param bw: the achieved bandwidth
304 void amok_bw_saturate_stop(const char* from_name,unsigned int from_port,
305 /*out*/ double *time, double *bw) {
308 gras_socket_t sock = gras_socket_client(from_name,from_port);
310 VERB2("Ask %s:%d to stop the saturation",from_name,from_port);
312 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat stop"),NULL,&answer);
314 RETHROW2("Cannot ask %s:%d to stop saturation: %s",from_name, from_port);
316 gras_socket_close(sock);
317 if (time) *time=answer->sec;
318 if (bw) *bw =answer->bw;