* Need to take the numerator of the timebase info into account, as the mach

timers might natively return nanoseconds instead of microseconds, as is
  the case on x86.  Fixes an issue with really high shared memory latencies
  on Intel macs

This commit was SVN r13038.

NEWS

@@ -12,6 +12,8 @@ Copyright (c) 2006      Cisco Systems, Inc.  All rights reserved.
 Copyright (c) 2006      Voltaire, Inc. All rights reserved.
 Copyright (c) 2006      Sun Microsystems, Inc.  All rights reserved.
                         Use is subject to license terms.
+Copyright (c) 2006-2007 Los Alamos National Security, LLC.  All rights
+                        reserved.
 $COPYRIGHT$
 
 Additional copyrights may follow
@@ -92,6 +94,8 @@ Trunk (not on release branches yet)
 1.1.3
 -----
 
+- Fix math error on Intel OS X platforms that would greatly increase
+  shared memory latency.
 - Fix type casting issue with MPI_ERRCODES_IGNORE that would cause
   errors when using a C++ compiler.  Thanks to Barry Smith for
   bringing this to our attention.

opal/mca/timer/darwin/timer_darwin_component.c

@@ -9,6 +9,8 @@
  *                         University of Stuttgart.  All rights reserved.
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
+ * Copyright (c) 2007      Los Alamos National Security, LLC.  All rights
+ *                         reserved.
  * $COPYRIGHT$
  * 
  * Additional copyrights may follow
@@ -62,7 +64,7 @@ int opal_timer_darwin_open(void)
 
     mach_timebase_info(&sTBI);
 
-    opal_timer_darwin_freq = sTBI.denom;
+    opal_timer_darwin_freq = sTBI.denom * (1000000000 / sTBI.numer);
 
     return OPAL_SUCCESS;
 }