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_EXTERNAL_CATEGORY(amok_bw);
14 XBT_LOG_DEFAULT_CATEGORY(amok_bw);
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,"host",gras_datadesc_by_name("s_xbt_host_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 host 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 host 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 sock = gras_socket_client(from_name,from_port);
79 request->host.name = (char*)to_name;
80 request->host.port = to_port;
82 request->duration=duration;
83 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->host.name,request->host.port);
101 gras_msg_rpcreturn(60,ctx, NULL);
102 amok_bw_saturate_begin(request->host.name,request->host.port,
103 request->msg_size, request->duration,
105 free(request->host.name);
111 * @brief Start saturating between the current process and the designated peer
113 * Note that the only way to break this function before the end of the timeout
114 * is to have a remote host calling amok_bw_saturate_stop to this process.
116 * If duration=0, the experiment will never timeout (you then have to manually
119 void amok_bw_saturate_begin(const char* to_name,unsigned int to_port,
120 unsigned int msg_size, double duration,
121 /*out*/ double *elapsed_res, double *bw_res) {
125 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
126 gras_msg_cb_ctx_t ctx;
130 s_gras_msg_t msg_got;
132 unsigned int packet_sent=0;
133 double start,elapsed=-1; /* timer */
136 volatile int saturate_further; /* boolean in the main loop */
138 /* Negociate the saturation with the peer */
139 sat_request_t request = xbt_new(s_sat_request_t,1);
141 DEBUG2("Begin to saturate to %s:%d",to_name,to_port);
142 memset(&msg_got,0,sizeof(msg_got));
144 request->msg_size = msg_size;
145 request->duration = duration;
146 request->host.name = NULL;
147 request->host.port = 0;
149 ctx = gras_msg_rpc_async_call(peer_cmd, 60,
150 gras_msgtype_by_name("amok_bw_sat begin"),
153 gras_msg_rpc_async_wait(ctx,&request);
154 meas=gras_socket_client_ext( to_name, request->host.port,
159 gras_socket_close(peer_cmd);
160 INFO2("Saturation from %s to %s started",gras_os_myname(),to_name);
162 /* Start experiment */
163 start=gras_os_time();
167 gras_socket_meas_send(meas,120,msg_size,msg_size);
170 /* Check whether someone asked us to stop saturation */
171 saturate_further = 0;
173 gras_msg_wait_ext(0/*no wait*/,gras_msgtype_by_name("amok_bw_sat stop"),
174 NULL /* accept any sender */,
175 NULL, NULL, /* No specific filter */
178 if (e.category == timeout_error) {
180 memset(&msg_got,0,sizeof(msg_got)); /* may be overprotectiv here */
185 /* Check whether the experiment has to be terminated by now */
186 elapsed=gras_os_time()-start;
187 VERB2("elapsed %f duration %f",elapsed, duration);
189 } while (saturate_further && (duration!=0 && elapsed < duration));
191 bw = ((double)(packet_sent*msg_size)) / elapsed;
194 *elapsed_res = elapsed;
198 /* If someone stopped us, inform him about the achieved bandwidth */
200 bw_res_t answer = xbt_new(s_bw_res_t,1);
201 s_gras_msg_cb_ctx_t ctx;
203 INFO3("Saturation from %s to %s stopped by %s",
204 gras_os_myname(),to_name, gras_socket_peer_name(msg_got.expe));
205 answer->timestamp=gras_os_time();
209 ctx.expeditor = msg_got.expe;
211 ctx.msgtype = msg_got.type;
213 gras_msg_rpcreturn(60,&ctx,&answer);
216 INFO4("Saturation from %s to %s elapsed after %f sec (achieving %f kb/s)",
217 gras_os_myname(),to_name,elapsed,bw/1024.0);
220 gras_socket_close(meas);
223 /* Sender will saturate link to us */
224 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload){
225 sat_request_t request=*(sat_request_t*)payload;
226 sat_request_t answer=xbt_new0(s_sat_request_t,1);
227 volatile int saturate_further = 1;
229 gras_socket_t measMaster=NULL,meas=NULL;
232 while (port <= 10000 && measMaster == NULL) {
234 measMaster = gras_socket_server_ext(port,
242 RETHROW0("Error encountered while opening a measurement server socket: %s");
244 if (measMaster == NULL)
245 port++; /* prepare for a new loop */
247 answer->host.port=port;
249 gras_msg_rpcreturn(60, ctx, &answer);
252 gras_os_sleep(5); /* Wait for the accept */
255 meas = gras_socket_meas_accept(measMaster);
256 DEBUG0("saturation handshake answered");
258 gras_socket_close(measMaster);
259 RETHROW0("Error during saturation handshake: %s");
262 while (saturate_further) {
264 gras_socket_meas_recv(meas,120,request->msg_size,request->msg_size);
266 saturate_further = 0;
270 INFO1("Saturation stopped on %s",gras_os_myname());
271 gras_socket_close(meas);
272 if (gras_if_RL()) /* On SG, accepted=master */
273 gras_socket_close(measMaster);
279 * @brief Ask 'from_name:from_port' to stop any saturation experiments
280 * @param from_name: Name of the host we are asking to do a experiment with (to_name:to_port)
281 * @param from_port: port on which the process we are asking for an experiment is listening
282 * @param time: the duration of the experiment
283 * @param bw: the achieved bandwidth
286 void amok_bw_saturate_stop(const char* from_name,unsigned int from_port,
287 /*out*/ double *time, double *bw) {
289 gras_socket_t sock = gras_socket_client(from_name,from_port);
291 VERB2("Ask %s:%d to stop the saturation",
292 from_name,from_port);
293 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat stop"),NULL,&answer);
294 gras_socket_close(sock);
295 if (time) *time=answer->sec;
296 if (bw) *bw =answer->bw;