X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/a4488cf61cb9b235eb6a370dbd0ab63ff936e72a..67ce6d412627210abbaeafc5d67eef31f39ce2d9:/src/amok/Bandwidth/saturate.c

diff --git a/src/amok/Bandwidth/saturate.c b/src/amok/Bandwidth/saturate.c
index f58c8c90d4..c962c59924 100644
--- a/src/amok/Bandwidth/saturate.c
+++ b/src/amok/Bandwidth/saturate.c
@@ -2,349 +2,341 @@
 
 /* amok_saturate - Link saturating facilities (for ALNeM's BW testing)      */
 
-/* Authors: Martin Quinson                                                  */
-/* Copyright (C) 2003, 2004 the OURAGAN project.                            */
+/* Copyright (c) 2003, 2004 Martin Quinson. All rights reserved.            */
 
 /* This program is free software; you can redistribute it and/or modify it
-   under the terms of the license (GNU LGPL) which comes with this package. */
+ * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "amok/Bandwidth/bandwidth_private.h"
+#include "gras/Msg/msg_private.h" /* FIXME: This mucks with contextes to answer RPC directly */
+#include "xbt/ex.h"
 
-GRAS_LOG_EXTERNAL_CATEGORY(bw);
-GRAS_LOG_DEFAULT_CATEGORY(bw);
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_bw_sat,amok_bw,"Everything concerning the SATuration part of the amok_bw module");
 
-#if 0
-/* ***************************************************************************
- * Link saturation
- * ***************************************************************************/
-
-gras_error_t grasbw_saturate_start(const char* from_name,unsigned int from_port,
-				   const char* to_name,unsigned int to_port,
-				   unsigned int msgSize, unsigned int timeout) {
-  gras_sock_t *sock;
-  gras_error_t errcode;
-  /* The request */
-  SatExp_t *request;
-  msgHost_t *target;
-  /* answer */
-  gras_msg_t *answer;
-
-  if((errcode=gras_sock_client_open(from_name,from_port,&sock))) {
-    fprintf(stderr,"%s:%d:saturate_start(): Error %s encountered while contacting peer\n",
-	    __FILE__,__LINE__,gras_error_name(errcode));
-    return errcode;
-  }
-  if (!(request=(SatExp_t *)malloc(sizeof(SatExp_t))) ||
-      !(target=(msgHost_t*)malloc(sizeof(msgHost_t)))) {
-    fprintf(stderr,"%s:%d:saturate_start(): Malloc error\n",__FILE__,__LINE__);
-    gras_sock_close(sock);
-    return malloc_error;    
-  }
-
-  request->timeout=timeout;
-  request->msgSize=msgSize;
+static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload);
+static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload);
 
-  strcpy(target->host,to_name);
-  target->port=to_port;
 
-  if ((errcode=gras_msg_new_and_send(sock,GRASMSG_SAT_START, 2, 
-			      target,1,
-			      request,1))) {
-    fprintf(stderr,"%s:%d:saturate_start(): Error %s encountered while sending the request.\n",
-	    __FILE__,__LINE__,gras_error_name(errcode));
-    gras_sock_close(sock);
-    return errcode;
-  }
-  if ((errcode=gras_msg_wait(120,GRASMSG_SAT_STARTED,&answer))) {
-    fprintf(stderr,"%s:%d:saturate_start(): Error %s encountered while waiting for the ACK.\n",
-	    __FILE__,__LINE__,gras_error_name(errcode));
-    gras_sock_close(sock);
-    return errcode;
-  }
-
-  if((errcode=gras_msg_ctn(answer,0,0,msgError_t).errcode)) {
-    fprintf(stderr,"%s:%d:saturate_start(): Peer reported error %s (%s).\n",
-	    __FILE__,__LINE__,gras_error_name(errcode),gras_msg_ctn(answer,0,0,msgError_t).errmsg);
-    gras_msg_free(answer);
-    gras_sock_close(sock);
-    return errcode;
-  }
+void amok_bw_sat_init(void) {
+  gras_datadesc_type_t bw_res_desc=gras_datadesc_by_name("bw_res_t");
+  gras_datadesc_type_t sat_request_desc;
+  /* Build the saturation datatype descriptions */ 
+  
+  sat_request_desc = gras_datadesc_struct("s_sat_request_desc_t");
+  gras_datadesc_struct_append(sat_request_desc,"peer",gras_datadesc_by_name("s_xbt_peer_t"));
+  gras_datadesc_struct_append(sat_request_desc,"msg_size",gras_datadesc_by_name("unsigned int"));
+  gras_datadesc_struct_append(sat_request_desc,"duration",gras_datadesc_by_name("unsigned int"));
+  gras_datadesc_struct_close(sat_request_desc);
+  sat_request_desc = gras_datadesc_ref("sat_request_t",sat_request_desc);
+  
+  /* Register the saturation messages */
+  gras_msgtype_declare_rpc("amok_bw_sat start", sat_request_desc, NULL);
+  gras_msgtype_declare_rpc("amok_bw_sat begin", sat_request_desc, sat_request_desc);
+  gras_msgtype_declare_rpc("amok_bw_sat stop",  NULL,             bw_res_desc);
 
-  gras_msg_free(answer);
-  gras_sock_close(sock);
-  return no_error;
+}
+void amok_bw_sat_join(void) {
+  gras_cb_register(gras_msgtype_by_name("amok_bw_sat start"),
+		   &amok_bw_cb_sat_start);
+  gras_cb_register(gras_msgtype_by_name("amok_bw_sat begin"),
+		   &amok_bw_cb_sat_begin);
+}
+void amok_bw_sat_leave(void) {
+  gras_cb_unregister(gras_msgtype_by_name("amok_bw_sat start"),
+		     &amok_bw_cb_sat_start);
+  gras_cb_unregister(gras_msgtype_by_name("amok_bw_sat begin"),
+		     &amok_bw_cb_sat_begin);
 }
 
-int grasbw_cbSatStart(gras_msg_t *msg) {
-  gras_rawsock_t *raw;
-  gras_sock_t *sock;
-  gras_error_t errcode;
-  double start; /* time to timeout */
-
-  /* specification of the test to run */
-  char* to_name=gras_msg_ctn(msg,0,0,msgHost_t).host;
-  unsigned int to_port=gras_msg_ctn(msg,0,0,msgHost_t).port;
-
-  unsigned int msgSize=gras_msg_ctn(msg,1,0,SatExp_t).msgSize;
-  unsigned int timeout=gras_msg_ctn(msg,1,0,SatExp_t).timeout;
-  unsigned int raw_port;
+/* ***************************************************************************
+ * Link saturation
+ * ***************************************************************************/
 
-  /* The request */
-  SatExp_t *request;
-  /* answer */
-  gras_msg_t *answer;
+/**
+ * @brief Ask 'from_name:from_port' to stop saturating going to to_name:to_name.
+ *
+ * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
+ * @param from_port: port on which the process we are asking for an experiment is listening
+ * (for message, do not give a raw socket here. The needed raw socket will be negociated 
+ * between the peers)
+ * @param to_name: Name of the peer with which we should conduct the experiment
+ * @param to_port: port on which the peer process is listening for message
+ * @param msg_size: Size of each message sent.
+ * @param duration: How long in maximum should be the saturation.
+ *
+ * Ask the process 'from_name:from_port' to start to saturate the link between itself
+ * and to_name:to_name.
+ */
+void amok_bw_saturate_start(const char* from_name,unsigned int from_port,
+			    const char* to_name,unsigned int to_port,
+			    unsigned int msg_size, double duration) {
+  gras_socket_t sock;
+  xbt_ex_t e;
+  sat_request_t request = xbt_new(s_sat_request_t,1);
+
+  INFO4("Start from_name %s:%d -> to_name %s:%d",from_name,from_port,to_name,to_port);
+  sock = gras_socket_client(from_name,from_port);
+
+  request->peer.name = (char*)to_name;
+  request->peer.port = to_port;
+  
+  request->duration=duration;
+  request->msg_size=msg_size;
 
-  /*
-  fprintf(stderr,"grasbw_cbSatStart(sd=%p)\n",msg->sock);
-  fprintf(stderr,"(server=%d,raw=%d,fromPID=%d,toPID=%d,toHost=%p,toPort=%d,toChan=%d)\n",
-	  msg->sock->server_sock,msg->sock->raw_sock,msg->sock->from_PID,
-	  msg->sock->to_PID,msg->sock->to_host,msg->sock->to_port,msg->sock->to_chan);
-  */
+ TRY{
+  gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat start"),&request, NULL);
 
-  /* Negociate the saturation with the peer */
-  if((errcode=gras_sock_client_open(to_name,to_port,&sock))) {
-    fprintf(stderr,"cbSatStart(): Error %s encountered while contacting peer\n",
-	    gras_error_name(errcode));
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Cannot contact peer.\n");
-    return 1;
-  }
-  if (!(request=(SatExp_t *)malloc(sizeof(SatExp_t)))) {
-    fprintf(stderr,"cbSatStart(): Malloc error\n");
-    gras_sock_close(sock);
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     malloc_error,"Cannot build request.\n");
-    return 1;    
+  }CATCH(e){
+    if (e.value==1)
+      THROW1(0,1,"%s",to_name);
+    THROW1(0,0,"%s",from_name);
   }
+  free(request);
+  gras_socket_close(sock);
+}
 
-  request->timeout=gras_msg_ctn(msg,1,0,SatExp_t).timeout;
-  request->msgSize=gras_msg_ctn(msg,1,0,SatExp_t).msgSize;
-
-  if ((errcode=gras_msg_new_and_send(sock,GRASMSG_SAT_BEGIN, 1, 
-			      request,1))) {
-    fprintf(stderr,"cbSatStart(): Error %s encountered while sending the request.\n",
-	    gras_error_name(errcode));
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Cannot send request.\n");
-    gras_sock_close(sock);
-    return 1;
-  }
+/* Asked to begin a saturation */
+static int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx, void *payload){
+  sat_request_t request = *(sat_request_t*)payload;
+  gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
+ 
+  xbt_ex_t e;
 
-  if ((errcode=gras_msg_wait(120,GRASMSG_SAT_BEGUN,&answer))) {
-    fprintf(stderr,"cbSatStart(): Error %s encountered while waiting for the ACK.\n",
-	    gras_error_name(errcode));
-    gras_sock_close(sock);
+  VERB4("Asked by %s:%d to start a saturation to %s:%d",
+	gras_socket_peer_name(expeditor),gras_socket_peer_port(expeditor),
+	request->peer.name,request->peer.port);
+	
+  gras_msg_rpcreturn(60,ctx, NULL);
 
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,
-		     "Cannot receive the ACK.\n");
-    return 1;
-  }
+TRY{
+  amok_bw_saturate_begin(request->peer.name,request->peer.port,
 
-  if((errcode=gras_msg_ctn(answer,0,0,msgError_t).errcode)) {
-    fprintf(stderr,"cbSatStart(): Peer reported error %s (%s).\n",
-	    gras_error_name(errcode),gras_msg_ctn(answer,0,0,msgError_t).errmsg);
-
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,
-		     "Peer repported '%s'.\n",gras_msg_ctn(answer,0,0,msgError_t).errmsg);
-    gras_msg_free(answer);
-    gras_sock_close(sock);
-    return 1;
-  }
+			 request->msg_size, request->duration,
+			 NULL,NULL);
 
-  raw_port=gras_msg_ctn(answer,1,0,SatExp_t).port;
+  }CATCH(e){
+     THROW1(0,1," can not connect %s ",((request)->peer.name));
+  }
+ 
+  free(request->peer.name);
 
-  if ((errcode=gras_rawsock_client_open(to_name,raw_port,msgSize,&raw))) {
-    fprintf(stderr,"cbSatStart(): Error %s while opening raw socket to %s:%d.\n",
-	    gras_error_name(errcode),to_name,gras_msg_ctn(answer,1,0,SatExp_t).port);
+  free(request);
+  return 1;
+}
 
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Cannot open raw socket.\n");
-    gras_sock_close(sock);
-    return 1;
-  }
+/**
+ * @brief Start saturating between the current process and the designated peer
+ *
+ * Note that the only way to break this function before the end of the timeout
+ * is to have a remote peer calling amok_bw_saturate_stop to this process.
+ *
+ * If duration=0, the experiment will never timeout (you then have to manually
+ * stop it).
+ * 
+ * If msg_size=0, the size will be automatically computed to make sure that
+ * each of the messages occupy the connexion one second
+ */
+void amok_bw_saturate_begin(const char* to_name,unsigned int to_port,
+			    unsigned int msg_size, double duration,
+			    /*out*/ double *elapsed_res, double *bw_res) {
+ 
+  xbt_ex_t e;
+
+  gras_socket_t peer_cmd = gras_socket_client(to_name, to_port);
+  gras_msg_cb_ctx_t ctx;
+
+  gras_socket_t meas;
+
+  s_gras_msg_t msg_got;
+
+  unsigned int packet_sent=0;
+  double start,elapsed=-1; /* timer */
+  double bw;
+
+  volatile int saturate_further; /* boolean in the main loop */ 
 
-  /* send a train of data before repporting that XP is started */
-  if ((errcode=gras_rawsock_send(raw,msgSize,msgSize))) {
-    fprintf(stderr,"cbSatStart: Failure %s during raw send\n",gras_error_name(errcode));
-    grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Cannot raw send.\n");
-    gras_sock_close(sock);
-    gras_rawsock_close(raw);
-    return 1;
-  }
-  
-  grasRepportError(msg->sock,GRASMSG_SAT_STARTED,1,
-		   "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		   no_error,"Saturation started");
-  gras_msg_free(answer);
-  gras_msg_free(msg);
-  
-  /* Do the saturation until we get a SAT_STOP message or until we timeout the whole XP*/
-  start=gras_time();
-  while (gras_msg_wait(0,GRASMSG_SAT_STOP,&msg)==timeout_error && 
-	 gras_time()-start < timeout) {
-    if ((errcode=gras_rawsock_send(raw,msgSize,msgSize))) {
-      fprintf(stderr,"cbSatStart: Failure %s during raw send\n",gras_error_name(errcode));
-      /* our error message do not interess anyone. SAT_STOP will do nothing. */
-      gras_sock_close(sock);
-      gras_rawsock_close(raw);
-      return 1;
-    } 
-  }
-  if (gras_time()-start > timeout) {
-    fprintf(stderr,"The saturation experiment did timeout. Stop it NOW\n");
-    gras_sock_close(sock);
-    gras_rawsock_close(raw);
-    return 1;
+  /* Negociate the saturation with the peer */
+  sat_request_t request = xbt_new(s_sat_request_t,1);
+
+  DEBUG2("Begin to saturate to %s:%d",to_name,to_port);
+  memset(&msg_got,0,sizeof(msg_got));
+
+  request->msg_size = msg_size;
+  request->duration = duration;
+  request->peer.name = NULL;
+  request->peer.port = 0;
+
+
+  /* Size autodetection on need */
+  if (!msg_size) {
+    double bw;
+    double sec;
+    amok_bw_test(peer_cmd,
+		 0,512*1024, 512*1024, /* 512k as first guess */
+		 1, /* at least one sec */
+		 &sec, &bw);
+    msg_size = request->msg_size = (int)bw;
+    DEBUG1("Saturate with packets of %d bytes",request->msg_size);
   }
-
-  /* Handle the SAT_STOP which broke the previous while */
-  
-  if ((errcode=gras_msg_new_and_send(sock, GRASMSG_SAT_END,0))) {
-    fprintf(stderr,"cbSatStart(): Cannot tell peer to stop saturation\n");
-
-    grasRepportError(msg->sock,GRASMSG_SAT_STOPPED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Sending SAT_END to peer failed.\n");
-    gras_sock_close(sock);
-    gras_rawsock_close(raw);
-    return 1;
+   
+  /* Launch the saturation */
+
+  ctx = gras_msg_rpc_async_call(peer_cmd, 60, 
+				gras_msgtype_by_name("amok_bw_sat begin"),
+						  &request);
+  free(request);
+  gras_msg_rpc_async_wait(ctx,&request);
+  meas=gras_socket_client_ext( to_name, request->peer.port,
+			       0 /*bufsize: auto*/,
+			       1 /*meas: true*/);
+
+  free(request);
+
+  gras_socket_close(peer_cmd);
+  INFO4("Saturation(%s:%d->%s:%d) started",gras_os_myname(),gras_os_myport(),to_name,to_port);
+
+  /* Start experiment */
+  start=gras_os_time();
+
+  do {
+    /* do send it */
+    gras_socket_meas_send(meas,120,msg_size,msg_size);
+    packet_sent++;
+
+    /* Check whether someone asked us to stop saturation */
+    saturate_further = 0;
+    TRY {
+      gras_msg_wait_ext(0/*no wait*/,gras_msgtype_by_name("amok_bw_sat stop"),
+			NULL /* accept any sender */,
+			NULL, NULL, /* No specific filter */
+			&msg_got);
+    } CATCH(e) {
+      if (e.category == timeout_error) {
+	saturate_further=1;
+	memset(&msg_got,0,sizeof(msg_got)); /* may be overprotectiv here */
+      }
+      xbt_ex_free(e);
+    }
+
+    /* Check whether the experiment has to be terminated by now */
+    elapsed=gras_os_time()-start;
+    DEBUG3("elapsed %f duration %f (msg_size=%d)",elapsed, duration,msg_size);
+
+  } while (saturate_further && (duration==0 || elapsed < duration));
+
+  bw = ((double)(packet_sent*msg_size)) / elapsed;
+
+  if (elapsed_res)
+    *elapsed_res = elapsed;
+  if (bw_res)
+    *bw_res = bw;
+
+  /* If someone stopped us, inform him about the achieved bandwidth */
+  if (msg_got.expe) {
+    bw_res_t answer = xbt_new(s_bw_res_t,1);
+    s_gras_msg_cb_ctx_t ctx;
+
+    INFO6("Saturation from %s:%d to %s:%d stopped by %s:%d",
+	  gras_os_myname(),gras_os_myport(),to_name,to_port, gras_socket_peer_name(msg_got.expe),gras_socket_peer_port(msg_got.expe));
+    answer->timestamp=gras_os_time();
+    answer->sec=elapsed;
+    answer->bw=bw;
+
+    ctx.expeditor = msg_got.expe;
+    ctx.ID = msg_got.ID;
+    ctx.msgtype = msg_got.type;
+
+    gras_msg_rpcreturn(60,&ctx,&answer);
+    free(answer);
+  } else {
+    INFO6("Saturation from %s:%d to %s:%d elapsed after %f sec (achieving %f kb/s)",
+	  gras_os_myname(),gras_os_myport(),to_name,to_port,elapsed,bw/1024.0);
   }
   
-  if ((errcode=gras_msg_wait(60,GRASMSG_SAT_ENDED,&answer))) {
-    fprintf(stderr,"cbSatStart(): Peer didn't ACK the end\n");
-
-    grasRepportError(msg->sock,GRASMSG_SAT_STOPPED,1,
-		     "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Receiving SAT_ENDED from peer failed.\n");
-    gras_sock_close(sock);
-    gras_rawsock_close(raw);
-    return 1;
-  }
-  grasRepportError(msg->sock,GRASMSG_SAT_STOPPED,1,
-		   "cbSatStart: Severe error: Cannot send error status to requester!!\n",
-		   no_error,"");
-
-  gras_sock_close(sock);
-  gras_rawsock_close(raw);
-  gras_msg_free(answer);
-  gras_msg_free(msg);
-
-  return 1;  
+  gras_socket_close(meas);
 }
 
-int grasbw_cbSatBegin(gras_msg_t *msg) {
-  gras_rawsock_t *raw;
-  gras_error_t errcode;
-  double start; /* timer */
-  /* request */
-  unsigned int msgSize=gras_msg_ctn(msg,0,0,SatExp_t).msgSize;
-  unsigned int timeout=gras_msg_ctn(msg,0,0,SatExp_t).timeout;
-  /* answer */
-  SatExp_t *request;
-  msgError_t *error;
-
-  if (!(request=(SatExp_t*)malloc(sizeof(SatExp_t))) ||
-      !(error=(msgError_t *)malloc(sizeof(msgError_t)))) {
-    fprintf(stderr,"cbSatBegin(): Malloc error\n");
-    grasRepportError(msg->sock,GRASMSG_SAT_BEGUN,2,
-		     "cbSatBegin: Severe error: Cannot send error status to requester!!\n",
-		     malloc_error,"Malloc error");
-    return 1;
+/* Sender will saturate link to us */
+static int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx, void *payload){
+  sat_request_t request=*(sat_request_t*)payload;
+  sat_request_t answer=xbt_new0(s_sat_request_t,1);
+  volatile int saturate_further = 1;
+  xbt_ex_t e;
+  gras_socket_t measMaster=NULL,meas=NULL;
+  gras_socket_t from=gras_msg_cb_ctx_from(ctx);
+
+  int port=6000;
+  while (port <= 10000 && measMaster == NULL) {
+    TRY {
+      measMaster = gras_socket_server_ext(port,
+					  0 /*bufsize: auto*/,
+					  1 /*meas: true*/);
+    } CATCH(e) {
+      measMaster = NULL;
+      if (port < 10000)
+	xbt_ex_free(e);
+      else
+	RETHROW0("Error encountered while opening a measurement server socket: %s");
+    }
+    if (measMaster == NULL) 
+      port++; /* prepare for a new loop */
   }
-
-  if ((errcode=gras_rawsock_server_open(6666,8000,msgSize,&raw))) { 
-    fprintf(stderr,"cbSatBegin(): Error %s encountered while opening a raw socket\n",
-	    gras_error_name(errcode));
-    grasRepportError(msg->sock,GRASMSG_SAT_BEGUN,2,
-		     "cbSatBegin: Severe error: Cannot send error status to requester!!\n",
-		     errcode,"Cannot open raw socket");
-    return 1;
+  answer->peer.port=port;
+
+  gras_msg_rpcreturn(60, ctx, &answer);
+  free(answer);
+
+  gras_os_sleep(5); /* Wait for the accept */
+
+  TRY {
+    meas = gras_socket_meas_accept(measMaster);
+    DEBUG0("saturation handshake answered");
+  } CATCH(e) {
+    gras_socket_close(measMaster);
+    RETHROW0("Error during saturation handshake: %s");
+  }  
+
+  while (saturate_further) {
+    TRY {
+      gras_socket_meas_recv(meas,5,request->msg_size,request->msg_size);
+    } CATCH(e) {
+      saturate_further = 0;
+      xbt_ex_free(e);
+    }
   }
-  request->port=gras_rawsock_get_peer_port(raw);
-  request->msgSize=msgSize;
-  error->errcode=no_error;
-  error->errmsg[0]='\0';
-  if ((errcode=gras_msg_new_and_send(msg->sock,GRASMSG_SAT_BEGUN,2,
-			      error,1,
-			      request,1))) {
-    fprintf(stderr,"cbSatBegin(): Error %s encountered while send ACK to peer\n",
-	    gras_error_name(errcode));
-    return 1;
-  }
-  gras_msg_free(msg);
-
-  start=gras_time();
-  while (gras_msg_wait(0,GRASMSG_SAT_END,&msg)==timeout_error &&
-	 gras_time() - start < timeout) {
-    errcode=gras_rawsock_recv(raw,msgSize,msgSize,1);
-    if (errcode != timeout_error && errcode != no_error) {
-      fprintf(stderr,"cbSatBegin: Failure %s during raw receive\n",gras_error_name(errcode));
-      /* our error message do not interess anyone. SAT_END will do nothing. */
-      /* (if timeout'ed, it may be because the sender stopped emission. so survive it) */
-      return 1;
-    } 
-  }
-  if (gras_time()-start > timeout) {
-    fprintf(stderr,"The saturation experiment did timeout. Stop it NOW.\n");
-    gras_rawsock_close(raw);
-    return 1;
-  }
-
-  grasRepportError(msg->sock,GRASMSG_SAT_ENDED,1,
-		   "cbSatBegin: Cannot send SAT_ENDED.\n",
-		   no_error,"");
-  gras_rawsock_close(raw);
-  gras_msg_free(msg);
+  INFO4("Saturation comming from %s:%d stopped on %s:%d",
+	gras_socket_peer_name(from),gras_socket_peer_port(from),
+	gras_os_myname(),gras_os_myport());
+
+  gras_socket_close(meas);
+  if (gras_if_RL()) /* On SG, accepted=master */
+    gras_socket_close(measMaster); 
+  free(request);
   return 1;
 }
 
-gras_error_t grasbw_saturate_stop(const char* from_name,unsigned int from_port,
-				 const char* to_name,unsigned int to_port) {
-  gras_error_t errcode;
-  gras_sock_t *sock;
-  gras_msg_t *answer;
-
-  if((errcode=gras_sock_client_open(from_name,from_port,&sock))) {
-    fprintf(stderr,"saturate_stop(): Error %s encountered while contacting peer\n",
-	    gras_error_name(errcode));
-    return errcode;
-  }
-
-  if ((errcode=gras_msg_new_and_send(sock,GRASMSG_SAT_STOP,0))) {
-    fprintf(stderr,"saturate_stop(): Error %s encountered while sending request\n",
-	    gras_error_name(errcode));
-    gras_sock_close(sock);
-    return errcode;
+/**
+ * @brief Ask 'from_name:from_port' to stop any saturation experiments
+ * @param from_name: Name of the peer we are asking to do a experiment with (to_name:to_port)
+ * @param from_port: port on which the process we are asking for an experiment is listening
+ * @param time: the duration of the experiment
+ * @param bw: the achieved bandwidth
+ *
+ */
+void amok_bw_saturate_stop(const char* from_name,unsigned int from_port,
+			   /*out*/ double *time, double *bw) {
+  xbt_ex_t e;
+   
+  gras_socket_t sock = gras_socket_client(from_name,from_port);
+  bw_res_t answer;
+  VERB2("Ask %s:%d to stop the saturation",from_name,from_port);
+  TRY {	
+     gras_msg_rpccall(sock,60,gras_msgtype_by_name("amok_bw_sat stop"),NULL,&answer);
+  } CATCH(e) {
+     RETHROW2("Cannot ask %s:%d to stop saturation: %s",from_name, from_port);
   }
-
-  if ((errcode=gras_msg_wait(120,GRASMSG_SAT_STOPPED,&answer))) {
-    fprintf(stderr,"saturate_stop(): Error %s encountered while receiving ACK\n",
-	    gras_error_name(errcode));
-    gras_sock_close(sock);
-    return errcode;
-  }
-
-  if((errcode=gras_msg_ctn(answer,0,0,msgError_t).errcode)) {
-    fprintf(stderr,"saturate_stop(): Peer reported error %s (%s).\n",
-	    gras_error_name(errcode),gras_msg_ctn(answer,0,0,msgError_t).errmsg);
-    gras_msg_free(answer);
-    gras_sock_close(sock);
-    return errcode;
-  }
-
-  gras_msg_free(answer);
-  gras_sock_close(sock);
-
-  return no_error;
+  gras_socket_close(sock);
+  if (time) *time=answer->sec;
+  if (bw)   *bw  =answer->bw;
+  free(answer);
 }
-#endif