From: Martin Quinson <martin.quinson@loria.fr>
Date: Fri, 28 Jul 2017 11:06:54 +0000 (+0200)
Subject: don't let every process do the initialization, only rank 0
X-Git-Tag: v3_17~313
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/9121f87db72ee514f1ecc706cf7c314b1d3f8a9e?hp=0c54495555dec7f8be37511e762e6120b8d80c7c

don't let every process do the initialization, only rank 0

Otherwise, overriding_send will be the value assigned to
previous_send, leading into a infinite call loop.
---

diff --git a/examples/smpi/replay/replay.c b/examples/smpi/replay/replay.c
index 078385a595..fb0e9f9577 100644
--- a/examples/smpi/replay/replay.c
+++ b/examples/smpi/replay/replay.c
@@ -28,9 +28,12 @@ int main(int argc, char *argv[]) {
   xbt_replay_action_register("blah", action_blah);
 
   /* The send action is an override, so we have to first save its previous value in a global */
-  previous_send = xbt_replay_action_get("send");
-  xbt_replay_action_register("send", overriding_send);
-
+  int rank;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  if (rank == 0) {
+    previous_send = xbt_replay_action_get("send");
+    xbt_replay_action_register("send", overriding_send);
+  }
   /* The regular run of the replayer */
   smpi_replay_main(&argc, &argv);
   return 0;