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the code of Matrix bandwidth function
[simgrid.git] / src / amok / Bandwidth / bandwidth.c
index 61b3d01..c9601a0 100644 (file)
@@ -2,11 +2,14 @@
 
 /* amok_bandwidth - Bandwidth tests facilities                              */
 
-/* Copyright (c) 2003-5 Martin Quinson. All rights reserved.                */
+/* Copyright (c) 2003-6 Martin Quinson.                                     */
+/* Copyright (c) 2006   Ahmed Harbaoui.                                     */
+/* 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. */
 
+#include "xbt/ex.h"
 #include "amok/Bandwidth/bandwidth_private.h"
 #include "gras/messages.h"
 
@@ -22,7 +25,7 @@ void amok_bw_init(void) {
 
   if (! _amok_bw_initialized) {
        
-     /* Build the datatype descriptions */ 
+     /* Build the Bandwidth datatype descriptions */ 
      bw_request_desc = gras_datadesc_struct("s_bw_request_t");
      gras_datadesc_struct_append(bw_request_desc,"host",
                                 gras_datadesc_by_name("xbt_host_t"));
@@ -36,13 +39,16 @@ void amok_bw_init(void) {
      bw_request_desc = gras_datadesc_ref("bw_request_t",bw_request_desc);
 
      bw_res_desc = gras_datadesc_struct("s_bw_res_t");
-     gras_datadesc_struct_append(bw_res_desc,"err",gras_datadesc_by_name("s_amok_remoterr_t"));
      gras_datadesc_struct_append(bw_res_desc,"timestamp",gras_datadesc_by_name("unsigned int"));
      gras_datadesc_struct_append(bw_res_desc,"seconds",gras_datadesc_by_name("double"));
      gras_datadesc_struct_append(bw_res_desc,"bw",gras_datadesc_by_name("double"));
      gras_datadesc_struct_close(bw_res_desc);
      bw_res_desc = gras_datadesc_ref("bw_res_t",bw_res_desc);
 
+     gras_msgtype_declare_rpc("BW handshake",bw_request_desc,bw_request_desc);
+     gras_msgtype_declare_rpc("BW request",  bw_request_desc,bw_res_desc);
+
+     /* Build the saturation datatype descriptions */ 
      sat_request_desc = gras_datadesc_struct("s_sat_request_desc_t");
      gras_datadesc_struct_append(sat_request_desc,"host",gras_datadesc_by_name("xbt_host_t"));
      gras_datadesc_struct_append(sat_request_desc,"msg_size",gras_datadesc_by_name("unsigned int"));
@@ -50,21 +56,15 @@ void amok_bw_init(void) {
      gras_datadesc_struct_close(sat_request_desc);
      sat_request_desc = gras_datadesc_ref("sat_request_t",sat_request_desc);
      
-     /* Register the bandwidth messages */
-     gras_msgtype_declare("BW handshake",     bw_request_desc);
-     gras_msgtype_declare("BW handshake ACK", bw_request_desc);
-     gras_msgtype_declare("BW request",       bw_request_desc);
-     gras_msgtype_declare("BW result",        bw_res_desc);
-     
      /* Register the saturation messages */
      gras_msgtype_declare("SAT start",   sat_request_desc);
-     gras_msgtype_declare("SAT started", gras_datadesc_by_name("amok_remoterr_t"));
+     gras_msgtype_declare("SAT started", NULL);
      gras_msgtype_declare("SAT begin",   sat_request_desc);
-     gras_msgtype_declare("SAT begun",   gras_datadesc_by_name("amok_remoterr_t"));
+     gras_msgtype_declare("SAT begun",   NULL);
      gras_msgtype_declare("SAT end",     NULL);
-     gras_msgtype_declare("SAT ended",   gras_datadesc_by_name("amok_remoterr_t"));
+     gras_msgtype_declare("SAT ended",   NULL);
      gras_msgtype_declare("SAT stop",    NULL);
-     gras_msgtype_declare("SAT stopped", gras_datadesc_by_name("amok_remoterr_t"));
+     gras_msgtype_declare("SAT stopped", NULL);
   }
    
   /* Register the callbacks */
@@ -111,79 +111,76 @@ void amok_bw_exit(void) {
  * \arg exp_size: Total size of data sent across the network
  * \arg msg_size: Size of each message sent. Ie, (\e expSize % \e msgSize) messages will be sent.
  * \arg sec: where the result (in seconds) should be stored.
- * \arg bw: observed Bandwidth (in kb/s) 
+ * \arg bw: observed Bandwidth (in byte/s) 
  *
  * Conduct a bandwidth test from the local process to the given peer.
  * This call is blocking until the end of the experiment.
  *
- * Results are reported in last args, and sizes are in kb.
+ * Results are reported in last args, and sizes are in byte.
  */
-xbt_error_t amok_bw_test(gras_socket_t peer,
-                        unsigned long int buf_size,
-                        unsigned long int exp_size,
-                        unsigned long int msg_size,
-                        /*OUT*/ double *sec, double *bw) {
+void amok_bw_test(gras_socket_t peer,
+                 unsigned long int buf_size,
+                 unsigned long int exp_size,
+                 unsigned long int msg_size,
+         /*OUT*/ double *sec, double *bw) {
 
   /* Measurement sockets for the experiments */
-  gras_socket_t measMasterIn,measIn,measOut;
+  gras_socket_t measMasterIn=NULL,measIn,measOut=NULL;
   int port;
-  xbt_error_t errcode;
   bw_request_t request,request_ack;
+  xbt_ex_t e;
   
-  for (port = 5000, errcode = system_error;
-       errcode == system_error && port < 10000;
-       errcode = gras_socket_server_ext(++port,buf_size,1,&measMasterIn));
-  if (errcode != no_error) {
-    ERROR1("Error %s encountered while opening a measurement socket",
-          xbt_error_name(errcode));
-    return errcode;
+  for (port = 5000; port < 10000 && measMasterIn == NULL; port++) {
+    TRY {
+      measMasterIn = gras_socket_server_ext(++port,buf_size,1);
+    } CATCH(e) {
+      measMasterIn = NULL;
+      if (port == 10000 -1) {
+       RETHROW0("Error caught while opening a measurement socket: %s");
+      } else {
+       xbt_ex_free(e); 
+      }
+    }
   }
-       
+  
   request=xbt_new0(s_bw_request_t,1);
-  request->buf_size=buf_size*1024;
-  request->exp_size=exp_size*1024;
-  request->msg_size=msg_size*1024;
+  request->buf_size=buf_size;
+  request->exp_size=exp_size;
+  request->msg_size=msg_size;
   request->host.name = NULL;
   request->host.port = gras_socket_my_port(measMasterIn);
-  VERB5("Handshaking with %s:%d to connect it back on my %d (expsize=%ld kb= %ld b)", 
+  VERB5("Handshaking with %s:%d to connect it back on my %d (expsize=%ld byte= %ld b)", 
        gras_socket_peer_name(peer),gras_socket_peer_port(peer), request->host.port,
        buf_size,request->buf_size);
 
-  if ((errcode=gras_msg_send(peer,gras_msgtype_by_name("BW handshake"),&request))) {
-    ERROR1("Error %s encountered while sending the BW request.", xbt_error_name(errcode));
-    return errcode;
-  }
-  TRY(gras_socket_meas_accept(measMasterIn,&measIn));
-
-  if ((errcode=gras_msg_wait(60,gras_msgtype_by_name("BW handshake ACK"),
-                            NULL,&request_ack))) {
-    ERROR1("Error %s encountered while waiting for the answer to BW request.\n",
-           xbt_error_name(errcode));
-    return errcode;
+  TRY {
+    gras_msg_rpccall(peer,60,
+                    gras_msgtype_by_name("BW handshake"),&request, &request_ack);
+  } CATCH(e) {
+    RETHROW0("Error encountered while sending the BW request: %s");
   }
-  
-  /* FIXME: What if there is a remote error? */
+  measIn = gras_socket_meas_accept(measMasterIn);
    
-  if((errcode=gras_socket_client_ext(gras_socket_peer_name(peer),
-                                    request_ack->host.port, 
-                                    request->buf_size,1,&measOut))) {
-    ERROR3("Error %s encountered while opening the measurement socket to %s:%d for BW test\n",
-           xbt_error_name(errcode),gras_socket_peer_name(peer),request_ack->host.port);
-    return errcode;
+  TRY {
+    measOut=gras_socket_client_ext(gras_socket_peer_name(peer),
+                                  request_ack->host.port, 
+                                  request->buf_size,1);
+  } CATCH(e) {
+    RETHROW2("Error encountered while opening the measurement socket to %s:%d for BW test: %s",
+            gras_socket_peer_name(peer),request_ack->host.port);
   }
   DEBUG1("Got ACK; conduct the experiment (msg_size=%ld)",request->msg_size);
 
   *sec=gras_os_time();
-  TRY(gras_socket_meas_send(measOut,120,request->exp_size,request->msg_size));
-  TRY(gras_socket_meas_recv(measIn,120,1,1));
-
-  /*catch
-    ERROR1("Error %s encountered while sending the BW experiment.",
-           xbt_error_name(errcode));
+  TRY {
+    gras_socket_meas_send(measOut,120,request->exp_size,request->msg_size);
+    gras_socket_meas_recv(measIn,120,1,1);
+  } CATCH(e) {
     gras_socket_close(measOut);
     gras_socket_close(measMasterIn);
     gras_socket_close(measIn);
-  */
+    RETHROW0("Unable to conduct the experiment: %s");
+  }
 
   *sec = gras_os_time() - *sec;
   *bw = ((double)exp_size) / *sec;
@@ -194,7 +191,6 @@ xbt_error_t amok_bw_test(gras_socket_t peer,
     gras_socket_close(measIn);
   gras_socket_close(measMasterIn);
   gras_socket_close(measOut);
-  return errcode;
 }
 
 
@@ -204,14 +200,15 @@ xbt_error_t amok_bw_test(gras_socket_t peer,
    receive the corresponding data on the measurement socket, 
    close the measurment socket
 
-   sizes are in byte (got converted from kb my expeditor)
+   sizes are in byte
 */
-int amok_bw_cb_bw_handshake(gras_socket_t  expeditor,
+int amok_bw_cb_bw_handshake(gras_msg_cb_ctx_t  ctx,
                            void          *payload) {
-  gras_socket_t measMasterIn,measIn,measOut;
+  gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
+  gras_socket_t measMasterIn=NULL,measIn=NULL,measOut=NULL;
   bw_request_t request=*(bw_request_t*)payload;
   bw_request_t answer;
-  xbt_error_t errcode;
+  xbt_ex_t e;
   int port;
   
   VERB5("Handshaked to connect to %s:%d (sizes: buf=%lu exp=%lu msg=%lu)",
@@ -221,13 +218,17 @@ int amok_bw_cb_bw_handshake(gras_socket_t  expeditor,
   /* Build our answer */
   answer = xbt_new0(s_bw_request_t,1);
   
-  for (port = 6000, errcode = system_error;
-       errcode == system_error;
-       errcode = gras_socket_server_ext(++port,request->buf_size,1,&measMasterIn));
-  if (errcode != no_error) {
-    ERROR1("Error %s encountered while opening a measurement server socket", xbt_error_name(errcode));
-    /* FIXME: tell error to remote */
-    return 1;
+  for (port = 6000; port < 10000 && measMasterIn == NULL; port++) {
+    TRY {
+      measMasterIn = gras_socket_server_ext(port,request->buf_size,1);
+    } CATCH(e) {
+      measMasterIn = NULL;
+      if (port < 10000)
+       xbt_ex_free(e);
+      else
+       /* FIXME: tell error to remote */
+       RETHROW0("Error encountered while opening a measurement server socket: %s");
+    }
   }
    
   answer->buf_size=request->buf_size;
@@ -235,43 +236,42 @@ int amok_bw_cb_bw_handshake(gras_socket_t  expeditor,
   answer->msg_size=request->msg_size;
   answer->host.port=gras_socket_my_port(measMasterIn);
 
-  /* Don't connect asap to leave time to other side to enter the accept() */
-  if ((errcode=gras_socket_client_ext(gras_socket_peer_name(expeditor),
-                                     request->host.port,
-                                     request->buf_size,1,&measOut))) { 
-    ERROR3("Error '%s' encountered while opening a measurement socket back to %s:%d", 
-          xbt_error_name(errcode),gras_socket_peer_name(expeditor),request->host.port);
+
+
+  TRY {
+    gras_msg_rpcreturn(60,ctx,&answer);
+  } CATCH(e) { 
+    gras_socket_close(measMasterIn);
     /* FIXME: tell error to remote */
-    return 1;
+    RETHROW0("Error encountered while sending the answer: %s");
   }
 
 
-  if ((errcode=gras_msg_send(expeditor,
-                            gras_msgtype_by_name("BW handshake ACK"),
-                            &answer))) {
-    ERROR1("Error %s encountered while sending the answer.",
-           xbt_error_name(errcode));
-    gras_socket_close(measMasterIn);
-    gras_socket_close(measOut);
+  /* Don't connect asap to leave time to other side to enter the accept() */
+  TRY {
+    measOut = gras_socket_client_ext(gras_socket_peer_name(expeditor),
+                                    request->host.port,
+                                    request->buf_size,1);
+  } CATCH(e) {
+    RETHROW2("Error encountered while opening a measurement socket back to %s:%d : %s", 
+            gras_socket_peer_name(expeditor),request->host.port);
     /* FIXME: tell error to remote */
-    return 1;
   }
-  TRY(gras_socket_meas_accept(measMasterIn,&measIn));
-  DEBUG4("BW handshake answered. buf_size=%lu exp_size=%lu msg_size=%lu port=%d",
-       answer->buf_size,answer->exp_size,answer->msg_size,answer->host.port);
 
-  TRY(gras_socket_meas_recv(measIn, 120,request->exp_size,request->msg_size));
-  TRY(gras_socket_meas_send(measOut,120,1,1));
+  TRY {
+    measIn = gras_socket_meas_accept(measMasterIn);
+    DEBUG4("BW handshake answered. buf_size=%lu exp_size=%lu msg_size=%lu port=%d",
+          answer->buf_size,answer->exp_size,answer->msg_size,answer->host.port);
 
-  /*catch
-    ERROR1("Error %s encountered while receiving the experiment.",
-           xbt_error_name(errcode));
+    gras_socket_meas_recv(measIn, 120,request->exp_size,request->msg_size);
+    gras_socket_meas_send(measOut,120,1,1);
+  } CATCH(e) {
     gras_socket_close(measMasterIn);
     gras_socket_close(measIn);
     gras_socket_close(measOut);
-    * FIXME: tell error to remote ? *
-    return 1;
-    }*/
+    /* FIXME: tell error to remote ? */
+    RETHROW0("Error encountered while receiving the experiment: %s");
+  }
 
   if (measIn != measMasterIn)
     gras_socket_close(measMasterIn);
@@ -296,22 +296,21 @@ int amok_bw_cb_bw_handshake(gras_socket_t  expeditor,
  * \arg exp_size: Total size of data sent across the network
  * \arg msg_size: Size of each message sent. (\e expSize % \e msgSize) messages will be sent.
  * \arg sec: where the result (in seconds) should be stored.
- * \arg bw: observed Bandwidth (in kb/s)
+ * \arg bw: observed Bandwidth (in byte/s)
  *
  * Conduct a bandwidth test from the process from_host:from_port to to_host:to_port.
  * This call is blocking until the end of the experiment.
  *
- * Results are reported in last args, and sizes are in kb.
+ * Results are reported in last args, and sizes are in bytes.
  */
-xbt_error_t amok_bw_request(const char* from_name,unsigned int from_port,
-                           const char* to_name,unsigned int to_port,
-                           unsigned long int buf_size,
-                           unsigned long int exp_size,
-                           unsigned long int msg_size,
-                           /*OUT*/ double *sec, double*bw) {
+void amok_bw_request(const char* from_name,unsigned int from_port,
+                    const char* to_name,unsigned int to_port,
+                    unsigned long int buf_size,
+                    unsigned long int exp_size,
+                    unsigned long int msg_size,
+            /*OUT*/ double *sec, double*bw) {
   
   gras_socket_t sock;
-  xbt_error_t errcode;
   /* The request */
   bw_request_t request;
   bw_res_t result;
@@ -324,11 +323,8 @@ xbt_error_t amok_bw_request(const char* from_name,unsigned int from_port,
   request->host.name = (char*)to_name;
   request->host.port = to_port;
 
-  TRY(gras_socket_client(from_name,from_port,&sock));
-  TRY(gras_msg_send(sock,gras_msgtype_by_name("BW request"),&request));
-  free(request);
-
-  TRY(gras_msg_wait(240,gras_msgtype_by_name("BW result"),NULL, &result));
+  sock = gras_socket_client(from_name,from_port);
+  gras_msg_rpccall(sock,240,gras_msgtype_by_name("BW request"),&request, &result);
   
   *sec=result->sec;
   *bw =result->bw;
@@ -339,24 +335,22 @@ xbt_error_t amok_bw_request(const char* from_name,unsigned int from_port,
 
   gras_socket_close(sock);
   free(result);
-  return no_error;
 }
 
-int amok_bw_cb_bw_request(gras_socket_t    expeditor,
+int amok_bw_cb_bw_request(gras_msg_cb_ctx_t ctx,
                          void            *payload) {
                          
-  xbt_error_t errcode;                   
   /* specification of the test to run, and our answer */
   bw_request_t request = *(bw_request_t*)payload;
   bw_res_t result = xbt_new0(s_bw_res,1);
   gras_socket_t peer;
 
-  TRY(gras_socket_client(request->host.name,request->host.port,&peer));
-  TRY(amok_bw_test(peer,
-                  request->buf_size,request->exp_size,request->msg_size,
-                  &(result->sec),&(result->bw)));
+  peer = gras_socket_client(request->host.name,request->host.port);
+  amok_bw_test(peer,
+              request->buf_size,request->exp_size,request->msg_size,
+              &(result->sec),&(result->bw));
 
-  TRY(gras_msg_send(expeditor,gras_msgtype_by_name("BW result"),&result));
+  gras_msg_rpcreturn(240,ctx,&result);
 
   gras_os_sleep(1);
   gras_socket_close(peer);
@@ -364,381 +358,49 @@ int amok_bw_cb_bw_request(gras_socket_t    expeditor,
   free(result);
   
   return 1;
-
-#if 0
-  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 bufSize=gras_msg_ctn(msg,1,0,BwExp_t).bufSize;
-  unsigned int expSize=gras_msg_ctn(msg,1,0,BwExp_t).expSize;
-  unsigned int msgSize=gras_msg_ctn(msg,1,0,BwExp_t).msgSize;
-  /* our answer */
-  msgError_t *error;
-  msgResult_t *res;
-
-  if ((error->errcode=grasbw_test(to_name,to_port,bufSize,expSize,msgSize,
-                                 &(res[0].value),&(res[1].value) ))) {
-    fprintf(stderr,
-           "%s:%d:grasbw_cbRequest: Error %s encountered while doing the test\n",
-           __FILE__,__LINE__,xbt_error_name(error->errcode));
-    strncpy(error->errmsg,"Error within grasbw_test",ERRMSG_LEN);
-    gras_msg_new_and_send(msg->sock,GRASMSG_BW_RESULT,2,
-                  error,1,
-                  res,2);
-    return 1;
-  }
-  res[0].timestamp = (unsigned int) gras_time();
-  res[1].timestamp = (unsigned int) gras_time();
-  gras_msg_new_and_send(msg->sock,GRASMSG_BW_RESULT,2,
-                error,1,
-                res,2);
-  gras_msg_free(msg);
-  return 1;
-#endif
 }
 
-int amok_bw_cb_sat_start(gras_socket_t     expeditor,
+int amok_bw_cb_sat_start(gras_msg_cb_ctx_t ctx,
                         void             *payload) {
    CRITICAL0("amok_bw_cb_sat_start; not implemented");
    return 1;
 } 
-int amok_bw_cb_sat_begin(gras_socket_t     expeditor,
+int amok_bw_cb_sat_begin(gras_msg_cb_ctx_t ctx,
                         void             *payload) {
    CRITICAL0("amok_bw_cb_sat_begin: not implemented");
    return 1;
 }
-#if 0
-/* ***************************************************************************
- * Link saturation
- * ***************************************************************************/
-
-xbt_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;
-  xbt_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__,xbt_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;
-
-  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__,xbt_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__,xbt_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__,xbt_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;
-}
-
-int grasbw_cbSatStart(gras_msg_t *msg) {
-  gras_rawsock_t *raw;
-  gras_sock_t *sock;
-  xbt_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;
-
-  /* The request */
-  SatExp_t *request;
-  /* answer */
-  gras_msg_t *answer;
-
-  /*
-  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);
-  */
-
-  /* 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",
-           xbt_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;    
-  }
-
-  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",
-           xbt_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;
-  }
-
-  if ((errcode=gras_msg_wait(120,GRASMSG_SAT_BEGUN,&answer))) {
-    fprintf(stderr,"cbSatStart(): Error %s encountered while waiting for the ACK.\n",
-           xbt_error_name(errcode));
-    gras_sock_close(sock);
-
-    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;
-  }
-
-  if((errcode=gras_msg_ctn(answer,0,0,msgError_t).errcode)) {
-    fprintf(stderr,"cbSatStart(): Peer reported error %s (%s).\n",
-           xbt_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;
-  }
-
-  raw_port=gras_msg_ctn(answer,1,0,SatExp_t).port;
-
-  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",
-           xbt_error_name(errcode),to_name,gras_msg_ctn(answer,1,0,SatExp_t).port);
-
-    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;
-  }
-
-  /* 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",xbt_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",xbt_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;
-  }
-
-  /* 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;
-  }
-  
-  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;  
-}
 
-int grasbw_cbSatBegin(gras_msg_t *msg) {
-  gras_rawsock_t *raw;
-  xbt_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;
-  }
+double * amok_bw_matrix(xbt_dynar_t hosts,
+                         int buf_size_bw, int exp_size_bw, int msg_size_bw) { 
+  double sec;
+  /* construct of matrixs for bandwith and Latency */
 
-  if ((errcode=gras_rawsock_server_open(6666,8000,msgSize,&raw))) { 
-    fprintf(stderr,"cbSatBegin(): Error %s encountered while opening a raw socket\n",
-           xbt_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;
-  }
-  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",
-           xbt_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",xbt_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);
-  return 1;
-}
 
-xbt_error_t grasbw_saturate_stop(const char* from_name,unsigned int from_port,
-                                const char* to_name,unsigned int to_port) {
-  xbt_error_t errcode;
-  gras_sock_t *sock;
-  gras_msg_t *answer;
+  double *matrix_bw;   /* matrix bandwidth */
+  int i,j,len=xbt_dynar_length(hosts);
 
-  if((errcode=gras_sock_client_open(from_name,from_port,&sock))) {
-    fprintf(stderr,"saturate_stop(): Error %s encountered while contacting peer\n",
-           xbt_error_name(errcode));
-    return errcode;
-  }
+  matrix_bw = (double *) malloc(sizeof(double)* len*len);
 
-  if ((errcode=gras_msg_new_and_send(sock,GRASMSG_SAT_STOP,0))) {
-    fprintf(stderr,"saturate_stop(): Error %s encountered while sending request\n",
-           xbt_error_name(errcode));
-    gras_sock_close(sock);
-    return errcode;
-  }
+  xbt_host_t h1,h2;
 
-  if ((errcode=gras_msg_wait(120,GRASMSG_SAT_STOPPED,&answer))) {
-    fprintf(stderr,"saturate_stop(): Error %s encountered while receiving ACK\n",
-           xbt_error_name(errcode));
-    gras_sock_close(sock);
-    return errcode;
-  }
+  h1 = xbt_new(s_xbt_host_t,1);
+  h2 = xbt_new(s_xbt_host_t,1);
+  i=0;
+  xbt_dynar_foreach (hosts,i,h1) {
+    j=0;
+    xbt_dynar_foreach (hosts,j,h2) {
+      if(i!=j) {
+        /* Mesurements of Bandwidth */
+        amok_bw_request(h1->name,h1->port,h2->name,h2->port,
+                        buf_size_bw,exp_size_bw,msg_size_bw,&sec,&matrix_bw[i*len + j]);
+      } else {
+        matrix_bw[i*len +j] = 0.0;
+      }
 
-  if((errcode=gras_msg_ctn(answer,0,0,msgError_t).errcode)) {
-    fprintf(stderr,"saturate_stop(): Peer reported error %s (%s).\n",
-           xbt_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;
+  free(h1);
+  free(h2);
+  return matrix_bw;
 }
-#endif