[mpich-commits] [mpich] MPICH primary repository branch, master, updated. v3.1.1-80-g02813e2

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http://git.mpich.org/mpich.git/commitdiff/02813e26c1746a11167be3454fb9912673af0711

commit 02813e26c1746a11167be3454fb9912673af0711
Author: Pavan Balaji <balaji at anl.gov>
Date:   Fri Jul 11 12:47:27 2014 -0500

    Use global variable for MPI_PUT operations.
    
    We were using a stack variable earlier, so when FLUSH from a different
    thread tried to send that data out it couldn't access that address.
    
    Signed-off-by: Xin Zhao <xinzhao3 at illinois.edu>

diff --git a/test/mpi/threads/rma/multirma.c b/test/mpi/threads/rma/multirma.c
index eb9d5b5..4501dca 100644
--- a/test/mpi/threads/rma/multirma.c
+++ b/test/mpi/threads/rma/multirma.c
@@ -15,14 +15,16 @@
 #define LOOPS 100000
 
 MPI_Win win;
-int errs = 0;
+int errs = 0, dummy;
 
 MTEST_THREAD_RETURN_TYPE run_test(void *arg)
 {
     int i;
 
     for (i = 0; i < LOOPS; i++) {
-        MPI_Put(&i, 1, MPI_INT, 0, 0, 1, MPI_INT, win);
+        /* send a global variable, rather than a stack variable, so
+         * other threads can access the address during flush */
+        MPI_Put(&dummy, 1, MPI_INT, 0, 0, 1, MPI_INT, win);
         MPI_Win_flush(0, win);
     }
 

-----------------------------------------------------------------------

Summary of changes:
 test/mpi/threads/rma/multirma.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)


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