Revision: 54958
http://brlcad.svn.sourceforge.net/brlcad/?rev=54958&view=rev
Author: brlcad
Date: 2013-03-29 04:54:12 +0000 (Fri, 29 Mar 2013)
Log Message:
-----------
need to explore the portability of this, but go ahead and locally override the
_GNU_SOURCE setting so that we can enable processor affinity for pthread
systems. after much headache, figured out that _GNU_SOURCE needs to be defined
before the common.h header. common includes some system headers and the
features.h header is only going to get read once to set the necessary __USE_GNU
define and declaring the CPU_* macros and pthread affinity funcs the
implementation uses. this is going to jack up linux benchmarks, but it's a
nice 5-50% improvement on even small smp systems.
Modified Paths:
--------------
brlcad/trunk/src/libbu/affinity.c
Modified: brlcad/trunk/src/libbu/affinity.c
===================================================================
--- brlcad/trunk/src/libbu/affinity.c 2013-03-29 03:28:44 UTC (rev 54957)
+++ brlcad/trunk/src/libbu/affinity.c 2013-03-29 04:54:12 UTC (rev 54958)
@@ -18,20 +18,27 @@
* information.
*/
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE /* must come before common.h */
+#endif
+
#include "common.h"
-#include <stdio.h>
-#include <stdlib.h>
+#ifdef HAVE_SCHED_H
+# include <sched.h>
+#endif
#ifdef HAVE_PTHREAD_H
# include <pthread.h>
#endif
+#include "bu.h"
+
int
parallel_set_affinity(void)
{
-#if defined(_GNU_SOURCE) && defined(HAVE_PTHREAD_H)
+#if defined(HAVE_PTHREAD_H)
int cpulim = bu_avail_cpus(); /* Max number of CPUs available for the
process */
int status; /* Status of thread setting/getting */
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