[mpich-commits] [mpich] MPICH primary repository branch, master, updated. v3.1.2-67-gd19d904

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http://git.mpich.org/mpich.git/commitdiff/d19d9044c7bcaf958385f00944ef3a9d596885c0

commit d19d9044c7bcaf958385f00944ef3a9d596885c0
Author: Huiwei Lu <huiweilu at mcs.anl.gov>
Date:   Tue Aug 5 09:19:14 2014 -0500

    Improves random number generation in shfp_fname.c
    
    The original code uses MPI_Wtime to generate a mostly random double
    number, and convert it to int. The integer is then used as a part of a
    shared file name. Replaced with rand().
    
    It fixes the warning messages of 'Warning: ieee_inexact is signaling'
    signaled by PG Fortran compiler.
    
    Fixes #2071
    
    Signed-off-by: Rob Latham <robl at mcs.anl.gov>

diff --git a/src/mpi/romio/adio/common/shfp_fname.c b/src/mpi/romio/adio/common/shfp_fname.c
index c88fe18..e788d30 100644
--- a/src/mpi/romio/adio/common/shfp_fname.c
+++ b/src/mpi/romio/adio/common/shfp_fname.c
@@ -25,7 +25,6 @@
 
 void ADIOI_Shfp_fname(ADIO_File fd, int rank)
 {
-    double tm;
     int i;
     int len;
     char *slash, *ptr, tmp[128];
@@ -34,12 +33,8 @@ void ADIOI_Shfp_fname(ADIO_File fd, int rank)
     fd->shared_fp_fname = (char *) ADIOI_Malloc(256);
 
     if (!rank) {
-	tm = MPI_Wtime();
-	while (tm > 1000000000.0) tm -= 1000000000.0;
-	i = (int) tm;
-	tm = tm - (double) i;
-	tm *= 1000000.0;
-	i = (int) tm;
+        srand(time(NULL));
+        i = rand();
 	pid = (int)getpid();
 	
 	ADIOI_Strncpy(fd->shared_fp_fname, fd->filename, 256);

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

Summary of changes:
 src/mpi/romio/adio/common/shfp_fname.c |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)


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