3 /* amok_bandwidth - Bandwidth tests facilities */
5 /* Copyright (c) 2003-6 Martin Quinson. */
6 /* Copyright (c) 2006 Ahmed Harbaoui. */
7 /* All rights reserved. */
9 /* This program is free software; you can redistribute it and/or modify it
10 * under the terms of the license (GNU LGPL) which comes with this package. */
13 #include "amok/Bandwidth/bandwidth_private.h"
14 #include "gras/messages.h"
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_bw,amok,"Bandwidth testing");
19 /******************************
20 * Stuff global to the module *
21 ******************************/
23 static short _amok_bw_initialized = 0;
25 /** @brief module initialization; all participating nodes must run this */
26 void amok_bw_init(void) {
28 if (! _amok_bw_initialized) {
36 _amok_bw_initialized++;
39 /** @brief module finalization */
40 void amok_bw_exit(void) {
41 if (! _amok_bw_initialized)
47 _amok_bw_initialized--;
50 /* ***************************************************************************
52 * ***************************************************************************/
53 static int amok_bw_cb_bw_handshake(gras_msg_cb_ctx_t ctx, void *payload);
54 static int amok_bw_cb_bw_request(gras_msg_cb_ctx_t ctx, void *payload);
56 void amok_bw_bw_init() {
57 gras_datadesc_type_t bw_request_desc, bw_res_desc;
59 /* Build the Bandwidth datatype descriptions */
60 bw_request_desc = gras_datadesc_struct("s_bw_request_t");
61 gras_datadesc_struct_append(bw_request_desc,"peer",
62 gras_datadesc_by_name("s_xbt_peer_t"));
63 gras_datadesc_struct_append(bw_request_desc,"buf_size",
64 gras_datadesc_by_name("unsigned long int"));
65 gras_datadesc_struct_append(bw_request_desc,"exp_size",
66 gras_datadesc_by_name("unsigned long int"));
67 gras_datadesc_struct_append(bw_request_desc,"msg_size",
68 gras_datadesc_by_name("unsigned long int"));
69 gras_datadesc_struct_append(bw_request_desc,"min_duration",
70 gras_datadesc_by_name("double"));
71 gras_datadesc_struct_close(bw_request_desc);
72 bw_request_desc = gras_datadesc_ref("bw_request_t",bw_request_desc);
74 bw_res_desc = gras_datadesc_struct("s_bw_res_t");
75 gras_datadesc_struct_append(bw_res_desc,"timestamp",gras_datadesc_by_name("unsigned int"));
76 gras_datadesc_struct_append(bw_res_desc,"seconds",gras_datadesc_by_name("double"));
77 gras_datadesc_struct_append(bw_res_desc,"bw",gras_datadesc_by_name("double"));
78 gras_datadesc_struct_close(bw_res_desc);
79 bw_res_desc = gras_datadesc_ref("bw_res_t",bw_res_desc);
81 gras_msgtype_declare_rpc("BW handshake",bw_request_desc,bw_request_desc);
83 gras_msgtype_declare_rpc("BW reask",bw_request_desc,NULL);
84 gras_msgtype_declare("BW stop", NULL);
86 gras_msgtype_declare_rpc("BW request", bw_request_desc,bw_res_desc);
88 void amok_bw_bw_join() {
89 gras_cb_register(gras_msgtype_by_name("BW request"),
90 &amok_bw_cb_bw_request);
91 gras_cb_register(gras_msgtype_by_name("BW handshake"),
92 &amok_bw_cb_bw_handshake);
94 void amok_bw_bw_leave() {
95 gras_cb_unregister(gras_msgtype_by_name("BW request"),
96 &amok_bw_cb_bw_request);
97 gras_cb_unregister(gras_msgtype_by_name("BW handshake"),
98 &amok_bw_cb_bw_handshake);
102 * \brief bandwidth measurement between localhost and \e peer
104 * \arg peer: A (regular) socket at which the the host with which we should conduct the experiment can be contacted
105 * \arg buf_size: Size of the socket buffer. If 0, a sain default is used (32k, but may change)
106 * \arg exp_size: Total size of data sent across the network
107 * \arg msg_size: Size of each message sent. Ie, (\e expSize % \e msgSize) messages will be sent.
108 * \arg min_duration: The minimum wanted duration. When the test message is too little, you tend to measure the latency. This argument allows you to force the test to take at least, say one second.
109 * \arg sec: where the result (in seconds) should be stored. If the experiment was done several times because the first one was too short, this is the timing of the last run only.
110 * \arg bw: observed Bandwidth (in byte/s)
112 * Conduct a bandwidth test from the local process to the given peer.
113 * This call is blocking until the end of the experiment.
115 * If the asked experiment lasts less than \a min_duration, another one will be
116 * launched. Sizes (both \a exp_size and \a msg_size) will be multiplicated by
117 * (\a min_duration / measured_duration) (plus 10% to be sure to eventually
118 * reach the \a min_duration). In that case, the reported bandwidth and
119 * duration are the ones of the last run. \a msg_size cannot go over 64Mb
120 * because we need to malloc a block of this size in RL to conduct the
121 * experiment, and we still don't want to visit the swap.
123 * Results are reported in last args, and sizes are in byte.
125 void amok_bw_test(gras_socket_t peer,
126 unsigned long int buf_size,
127 unsigned long int exp_size,
128 unsigned long int msg_size,
130 /*OUT*/ double *sec, double *bw) {
132 /* Measurement sockets for the experiments */
133 gras_socket_t measMasterIn=NULL,measIn,measOut=NULL;
135 bw_request_t request,request_ack;
138 int nb_messages = (exp_size % msg_size == 0) ?
139 (exp_size / msg_size) : (exp_size / msg_size + 1);
141 for (port = 5000; port < 10000 && measMasterIn == NULL; port++) {
143 measMasterIn = gras_socket_server_ext(++port,buf_size,1);
146 if (port == 10000 -1) {
147 RETHROW0("Error caught while opening a measurement socket: %s");
154 request=xbt_new0(s_bw_request_t,1);
155 request->buf_size=buf_size;
156 request->exp_size=msg_size * nb_messages;
157 request->msg_size=msg_size;
158 request->peer.name = NULL;
159 request->peer.port = gras_socket_my_port(measMasterIn);
160 DEBUG5("Handshaking with %s:%d to connect it back on my %d (bufsize=%ld byte= %ld b)",
161 gras_socket_peer_name(peer),gras_socket_peer_port(peer), request->peer.port,
162 buf_size,request->buf_size);
165 gras_msg_rpccall(peer,15,
166 gras_msgtype_by_name("BW handshake"),&request, &request_ack);
168 RETHROW0("Error encountered while sending the BW request: %s");
170 measIn = gras_socket_meas_accept(measMasterIn);
173 measOut=gras_socket_client_ext(gras_socket_peer_name(peer),
174 request_ack->peer.port,
175 request->buf_size,1);
177 RETHROW2("Error encountered while opening the measurement socket to %s:%d for BW test: %s",
178 gras_socket_peer_name(peer),request_ack->peer.port);
180 DEBUG2("Got ACK; conduct the experiment (exp_size = %ld, msg_size=%ld)",
181 request->exp_size, request->msg_size);
186 if (first_pass == 0) {
187 double meas_duration=*sec;
189 request->msg_size = request->msg_size * (min_duration / meas_duration) * 1.1;
191 request->msg_size = request->msg_size * 4;
194 if (request->msg_size > 64*1024*1024)
195 request->msg_size = 64*1024*1024;
197 request->exp_size = request->msg_size * nb_messages;
199 VERB5("The experiment was too short (%f sec<%f sec). Redo it with exp_size=%ld msg_size=%ld (got %fkb/s)",
200 meas_duration,min_duration,request->exp_size,request->msg_size,((double)exp_size) / *sec/1024);
201 gras_msg_rpccall(peer, 60, gras_msgtype_by_name("BW reask"),&request, NULL);
207 gras_socket_meas_send(measOut,120,request->exp_size,request->msg_size);
208 DEBUG0("Data sent. Wait ACK");
209 gras_socket_meas_recv(measIn,120,1,1);
211 gras_socket_close(measOut);
212 gras_socket_close(measMasterIn);
213 gras_socket_close(measIn);
214 RETHROW0("Unable to conduct the experiment: %s");
216 *sec = gras_os_time() - *sec;
217 if (*sec != 0.0) { *bw = ((double)request->exp_size) / *sec; }
218 DEBUG1("Experiment done ; it took %f sec", *sec);
220 CRITICAL1("Nonpositive value (%f) found for BW test time.", *sec);
223 } while (*sec < min_duration);
225 DEBUG2("This measurement was long enough (%f sec; found %f b/s). Stop peer",
227 gras_msg_send(peer, gras_msgtype_by_name("BW stop"), NULL);
231 if (measIn != measMasterIn)
232 gras_socket_close(measIn);
233 gras_socket_close(measMasterIn);
234 gras_socket_close(measOut);
238 /* Callback to the "BW handshake" message:
239 opens a server measurement socket,
240 indicate its port in an "BW handshaked" message,
241 receive the corresponding data on the measurement socket,
242 close the measurment socket
246 int amok_bw_cb_bw_handshake(gras_msg_cb_ctx_t ctx,
248 gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
249 gras_socket_t measMasterIn=NULL,measIn=NULL,measOut=NULL;
250 bw_request_t request=*(bw_request_t*)payload;
255 gras_msg_cb_ctx_t ctx_reask;
256 static xbt_dynar_t msgtwaited=NULL;
258 DEBUG5("Handshaked to connect to %s:%d (sizes: buf=%lu exp=%lu msg=%lu)",
259 gras_socket_peer_name(expeditor),request->peer.port,
260 request->buf_size,request->exp_size,request->msg_size);
262 /* Build our answer */
263 answer = xbt_new0(s_bw_request_t,1);
265 for (port = 6000; port <= 10000 && measMasterIn == NULL; port++) {
267 measMasterIn = gras_socket_server_ext(port,request->buf_size,1);
273 /* FIXME: tell error to remote */
274 RETHROW0("Error encountered while opening a measurement server socket: %s");
278 answer->buf_size=request->buf_size;
279 answer->exp_size=request->exp_size;
280 answer->msg_size=request->msg_size;
281 answer->peer.port=gras_socket_my_port(measMasterIn);
284 gras_msg_rpcreturn(60,ctx,&answer);
286 gras_socket_close(measMasterIn);
287 /* FIXME: tell error to remote */
288 RETHROW0("Error encountered while sending the answer: %s");
292 /* Don't connect asap to leave time to other side to enter the accept() */
294 measOut = gras_socket_client_ext(gras_socket_peer_name(expeditor),
296 request->buf_size,1);
298 RETHROW2("Error encountered while opening a measurement socket back to %s:%d : %s",
299 gras_socket_peer_name(expeditor),request->peer.port);
300 /* FIXME: tell error to remote */
304 measIn = gras_socket_meas_accept(measMasterIn);
305 DEBUG4("BW handshake answered. buf_size=%lu exp_size=%lu msg_size=%lu port=%d",
306 answer->buf_size,answer->exp_size,answer->msg_size,answer->peer.port);
308 gras_socket_close(measMasterIn);
309 gras_socket_close(measIn);
310 gras_socket_close(measOut);
311 /* FIXME: tell error to remote ? */
312 RETHROW0("Error encountered while opening the meas socket: %s");
316 msgtwaited = xbt_dynar_new(sizeof(gras_msgtype_t),NULL);
317 xbt_dynar_push(msgtwaited,gras_msgtype_by_name("BW stop"));
318 xbt_dynar_push(msgtwaited,gras_msgtype_by_name("BW reask"));
325 gras_socket_meas_recv(measIn, 120,request->exp_size,request->msg_size);
326 gras_socket_meas_send(measOut,120,1,1);
328 gras_socket_close(measMasterIn);
329 gras_socket_close(measIn);
330 gras_socket_close(measOut);
331 /* FIXME: tell error to remote ? */
332 RETHROW0("Error encountered while receiving the experiment: %s");
334 gras_msg_wait_or(60,msgtwaited,&ctx_reask,&msggot,&payload);
336 case 0: /* BW stop */
339 case 1: /* BW reask */
342 request = (bw_request_t)payload;
343 VERB0("Return the reasking RPC");
344 gras_msg_rpcreturn(60,ctx_reask,NULL);
346 gras_msg_cb_ctx_free(ctx_reask);
349 if (measIn != measMasterIn)
350 gras_socket_close(measMasterIn);
351 gras_socket_close(measIn);
352 gras_socket_close(measOut);
355 VERB0("BW experiment done.");
360 * \brief request a bandwidth measurement between two remote peers
362 * \arg from_name: Name of the first peer
363 * \arg from_port: port on which the first process is listening for messages
364 * \arg to_name: Name of the second peer
365 * \arg to_port: port on which the second process is listening (for messages, do not
366 * give a measurement socket here. The needed measurement sockets will be created
367 * automatically and negociated between the peers)
368 * \arg buf_size: Size of the socket buffer. If 0, a sain default is used (32k, but may change)
369 * \arg exp_size: Total size of data sent across the network
370 * \arg msg_size: Size of each message sent. (\e expSize % \e msgSize) messages will be sent.
371 * \arg sec: where the result (in seconds) should be stored.
372 * \arg bw: observed Bandwidth (in byte/s)
374 * Conduct a bandwidth test from the process from_peer:from_port to to_peer:to_port.
375 * This call is blocking until the end of the experiment.
377 * Results are reported in last args, and sizes are in bytes.
379 void amok_bw_request(const char* from_name,unsigned int from_port,
380 const char* to_name,unsigned int to_port,
381 unsigned long int buf_size,
382 unsigned long int exp_size,
383 unsigned long int msg_size,
385 /*OUT*/ double *sec, double*bw) {
389 bw_request_t request;
391 request=xbt_new0(s_bw_request_t,1);
392 request->buf_size=buf_size;
393 request->exp_size=exp_size;
394 request->msg_size=msg_size;
395 request->min_duration = min_duration;
398 request->peer.name = (char*)to_name;
399 request->peer.port = to_port;
402 sock = gras_socket_client(from_name,from_port);
406 DEBUG4("Ask for a BW test between %s:%d and %s:%d", from_name,from_port, to_name,to_port);
407 gras_msg_rpccall(sock,20*60,gras_msgtype_by_name("BW request"), &request, &result);
414 VERB6("BW test (%s:%d -> %s:%d) took %f sec (%f kb/s)",
415 from_name,from_port, to_name,to_port,
416 result->sec,((double)result->bw)/1024.0);
418 gras_socket_close(sock);
423 int amok_bw_cb_bw_request(gras_msg_cb_ctx_t ctx,
426 /* specification of the test to run, and our answer */
427 bw_request_t request = *(bw_request_t*)payload;
428 bw_res_t result = xbt_new0(s_bw_res_t,1);
429 gras_socket_t peer,asker;
431 asker=gras_msg_cb_ctx_from(ctx);
432 VERB4("Asked by %s:%d to conduct a bw XP with %s:%d",
433 gras_socket_peer_name(asker),gras_socket_peer_port(asker),
435 request->peer.name,request->peer.port);
436 peer = gras_socket_client(request->peer.name,request->peer.port);
438 request->buf_size,request->exp_size,request->msg_size,
439 request->min_duration,
440 &(result->sec),&(result->bw));
442 gras_msg_rpcreturn(240,ctx,&result);
445 gras_socket_close(peer); /* FIXME: it should be blocking in RL until everything is sent */
446 free(request->peer.name);
453 /** \brief builds a matrix of results of bandwidth measurement */
454 double * amok_bw_matrix(xbt_dynar_t peers,
455 int buf_size_bw, int exp_size_bw, int msg_size_bw,
456 double min_duration) {
458 /* construction of matrices for bandwith and latency */
461 int i,j,len=xbt_dynar_length(peers);
463 double *matrix_res = xbt_new0(double, len*len);
466 xbt_dynar_foreach (peers,i,p1) {
467 xbt_dynar_foreach (peers,j,p2) {
469 /* Mesurements of Bandwidth */
470 amok_bw_request(p1->name,p1->port,p2->name,p2->port,
471 buf_size_bw,exp_size_bw,msg_size_bw,min_duration,
472 &sec,&matrix_res[i*len + j]);