From owner-svn-src-all@FreeBSD.ORG  Thu Jul  5 15:38:33 2012
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 2FDAA1065703;
	Thu,  5 Jul 2012 15:38:33 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 19D728FC1E;
	Thu,  5 Jul 2012 15:38:33 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q65FcWOZ081636;
	Thu, 5 Jul 2012 15:38:32 GMT (envelope-from kib@svn.freebsd.org)
Received: (from kib@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q65FcWGA081633;
	Thu, 5 Jul 2012 15:38:32 GMT (envelope-from kib@svn.freebsd.org)
Message-Id: <201207051538.q65FcWGA081633@svn.freebsd.org>
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 5 Jul 2012 15:38:32 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org
X-SVN-Group: stable-9
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r238136 - stable/9/lib/libc/gen
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 05 Jul 2012 15:38:33 -0000

Author: kib
Date: Thu Jul  5 15:38:32 2012
New Revision: 238136
URL: http://svn.freebsd.org/changeset/base/238136

Log:
  MFC r237660:
  Optimize the handling of SC_NPROCESSORS_CONF, by using auxv AT_NCPU
  value if present.
  
  Approved by:	re (kensmith)

Modified:
  stable/9/lib/libc/gen/sysconf.c
Directory Properties:
  stable/9/lib/libc/   (props changed)

Modified: stable/9/lib/libc/gen/sysconf.c
==============================================================================
--- stable/9/lib/libc/gen/sysconf.c	Thu Jul  5 15:37:17 2012	(r238135)
+++ stable/9/lib/libc/gen/sysconf.c	Thu Jul  5 15:38:32 2012	(r238136)
@@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/resource.h>
 #include <sys/socket.h>
 
+#include <elf.h>
 #include <errno.h>
 #include <limits.h>
 #include <paths.h>
@@ -51,6 +52,7 @@ __FBSDID("$FreeBSD$");
 
 #include "../stdlib/atexit.h"
 #include "tzfile.h"		/* from ../../../contrib/tzcode/stdtime */
+#include "libc_private.h"
 
 #define	_PATH_ZONEINFO	TZDIR	/* from tzfile.h */
 
@@ -585,6 +587,8 @@ yesno:
 
 	case _SC_NPROCESSORS_CONF:
 	case _SC_NPROCESSORS_ONLN:
+		if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0)
+			return ((long)value);
 		mib[0] = CTL_HW;
 		mib[1] = HW_NCPU;
 		break;