MPI: Allow enabling preposted receives with flag (#3596)

Can be enabled via passing "-DMPI_POST_RECV=1" to the compiler.
charmplusplus · Jun 22, 2022 · 868e39a · 868e39a
1 parent d88db76
commit 868e39a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/arch/mpi/machine.C b/src/arch/mpi/machine.C
@@ -142,7 +142,9 @@ CpvStaticDeclare(double, projTraceStart);
  * is set then a default value for MPI_POST_RECV_SIZE is used
  * if not specified by the user.
  */
-#define MPI_POST_RECV 0
+#ifndef MPI_POST_RECV
+#  define MPI_POST_RECV 0
+#endif
 
 /* Making those parameters configurable for testing them easily */