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_msg_rpcreturn(60,ctx, NULL);
96 amok_bw_saturate_begin(request->host.name,request->host.port,
97 request->msg_size, request->duration,
99 free(request->host.name);
105 * @brief Start saturating between the current process and the designated peer
107 * Note that the only way to break this function before the end of the timeout
108 * is to have a remote host calling amok_bw_saturate_stop to this process.
110 void amok_bw_saturate_begin(const char* to_name,unsigned int to_port,
111 unsigned int msg_size, double duration,
112 /*out*/ double *elapsed_res, double *bw_res) {
116 gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
117 gras_msg_cb_ctx_t ctx;
121 s_gras_msg_t msg_got;
123 unsigned int packet_sent=0;
124 double start,elapsed=-1; /* timer */
127 volatile int saturate_further; /* boolean in the main loop */
129 /* Negociate the saturation with the peer */
130 sat_request_t request = xbt_new(s_sat_request_t,1);
132 DEBUG2("Begin to saturate to %s:%d",to_name,to_port);
133 memset(&msg_got,0,sizeof(msg_got));
135 request->msg_size = msg_size;
136 request->duration = duration;
137 request->host.name = NULL;
138 request->host.port = 0;
140 ctx = gras_msg_rpc_async_call(peer_cmd, 60,
141 gras_msgtype_by_name("amok_bw_sat begin"),
144 gras_msg_rpc_async_wait(ctx,&request);
145 meas=gras_socket_client_ext( to_name, request->host.port,
150 gras_socket_close(peer_cmd);
151 INFO2("Saturation from %s to %s started",gras_os_myname(),to_name);
153 /* Start experiment */
154 start=gras_os_time();
158 gras_socket_meas_send(meas,120,msg_size,msg_size);
161 /* Check whether someone asked us to stop saturation */
162 saturate_further = 0;
164 gras_msg_wait_ext(0/*no wait*/,gras_msgtype_by_name("amok_bw_sat stop"),
165 NULL /* accept any sender */,
166 NULL, NULL, /* No specific filter */
169 if (e.category == timeout_error) {
171 memset(&msg_got,0,sizeof(msg_got)); /* may be overprotectiv here */
176 /* Check whether the experiment has to be terminated by now */
177 elapsed=gras_os_time()-start;
178 VERB2("elapsed %f duration %f",elapsed, duration);
180 } while (saturate_further && elapsed < duration);
182 INFO2("Saturation from %s to %s stopped",gras_os_myname(),to_name);
183 bw = ((double)(packet_sent*msg_size)) / elapsed;
186 *elapsed_res = elapsed;
190 if (elapsed >= duration) {
191 INFO2("Saturation experiment terminated. Took %f sec (achieving %f kb/s)",
195 /* If someone stopped us, inform him about the achieved bandwidth */
197 bw_res_t answer = xbt_new(s_bw_res_t,1);
198 s_gras_msg_cb_ctx_t ctx;
200 answer->timestamp=gras_os_time();
204 ctx.expeditor = msg_got.expe;
206 ctx.msgtype = msg_got.type;
208 gras_msg_rpcreturn(60,&ctx,&answer);
212 gras_socket_close(meas);
215 /* Sender will saturate link to us */
216 static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload){
217 sat_request_t request=*(sat_request_t*)payload;
218 sat_request_t answer=xbt_new0(s_sat_request_t,1);
219 volatile int saturate_further = 1;
221 gras_socket_t measMaster=NULL,meas=NULL;
224 while (port <= 10000 && measMaster == NULL) {
226 measMaster = gras_socket_server_ext(port,
234 RETHROW0("Error encountered while opening a measurement server socket: %s");
236 if (measMaster == NULL)
237 port++; /* prepare for a new loop */
239 answer->host.port=port;
241 gras_msg_rpcreturn(60, ctx, &answer);
244 gras_os_sleep(5); /* Wait for the accept */
247 meas = gras_socket_meas_accept(measMaster);
248 DEBUG0("saturation handshake answered");
250 gras_socket_close(measMaster);
251 RETHROW0("Error during saturation handshake: %s");
254 while (saturate_further) {
256 gras_socket_meas_recv(meas,120,request->msg_size,request->msg_size);
258 saturate_further = 0;
262 INFO1("Saturation stopped on %s",gras_os_myname());
263 gras_socket_close(meas);
264 if (gras_if_RL()) /* On SG, accepted=master */
265 gras_socket_close(measMaster);
271 * @brief Ask 'from_name:from_port' to stop any saturation experiments
272 * @param from_name: Name of the host we are asking to do a experiment with (to_name:to_port)
273 * @param from_port: port on which the process we are asking for an experiment is listening
274 * @param time: the duration of the experiment
275 * @param bw: the achieved bandwidth
278 void amok_bw_saturate_stop(const char* from_name,unsigned int from_port,
279 /*out*/ double *time, double *bw) {
281 gras_socket_t sock = gras_socket_client(from_name,from_port);
283 gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat stop"),NULL,&answer);
284 gras_socket_close(sock);
285 if (time) *time=answer->sec;
286 if (bw) *bw =answer->bw;