X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7d9a2608433e246294b7c4b339371fd4d3530ba6..5bd11d19929c8b6f70cc83ae718bbfc181ec4768:/src/surf/workstation.c

diff --git a/src/surf/workstation.c b/src/surf/workstation.c
index 4be0041845..fec50a4d3d 100644
--- a/src/surf/workstation.c
+++ b/src/surf/workstation.c
@@ -242,6 +242,30 @@ static surf_action_t ws_execute_parallel_task(int workstation_nb,
                                               double *communication_amount,
                                               double rate)
 {
+#define cost_or_zero(array,pos) ((array)?(array)[pos]:0.0)
+  if ((workstation_nb == 1)
+      && (cost_or_zero(communication_amount, 0) == 0.0))
+    return ws_execute(workstation_list[0], computation_amount[0]);
+  else if ((workstation_nb == 1)
+           && (cost_or_zero(computation_amount, 0) == 0.0))
+    return ws_communicate(workstation_list[0], workstation_list[0],communication_amount[0], rate);
+  else if ((workstation_nb == 2)
+             && (cost_or_zero(computation_amount, 0) == 0.0)
+             && (cost_or_zero(computation_amount, 1) == 0.0)) {
+    int i,nb = 0;
+    double value = 0.0;
+
+    for (i = 0; i < workstation_nb * workstation_nb; i++) {
+      if (cost_or_zero(communication_amount, i) > 0.0) {
+        nb++;
+        value = cost_or_zero(communication_amount, i);
+      }
+    }
+    if (nb == 1)
+      return ws_communicate(workstation_list[0], workstation_list[1],value, rate);
+  }
+#undef cost_or_zero
+
   THROW_UNIMPLEMENTED;          /* This model does not implement parallel tasks */
   return NULL;
 }