From owner-svn-src-user@FreeBSD.ORG  Mon Jun  8 23:03:38 2009
Return-Path: <owner-svn-src-user@FreeBSD.ORG>
Delivered-To: svn-src-user@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0E2D7106566B;
	Mon,  8 Jun 2009 23:03:38 +0000 (UTC)
	(envelope-from kmacy@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id F0B838FC14;
	Mon,  8 Jun 2009 23:03:37 +0000 (UTC)
	(envelope-from kmacy@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n58N3bJa047198;
	Mon, 8 Jun 2009 23:03:37 GMT (envelope-from kmacy@svn.freebsd.org)
Received: (from kmacy@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n58N3bOm047197;
	Mon, 8 Jun 2009 23:03:37 GMT (envelope-from kmacy@svn.freebsd.org)
Message-Id: <200906082303.n58N3bOm047197@svn.freebsd.org>
From: Kip Macy <kmacy@FreeBSD.org>
Date: Mon, 8 Jun 2009 23:03:37 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
X-SVN-Group: user
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r193778 - user/kmacy/releng_7_2_fcs/sys/kern
X-BeenThere: svn-src-user@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the experimental &quot; user&quot;
	src tree" <svn-src-user.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-user>,
	<mailto:svn-src-user-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-user>
List-Post: <mailto:svn-src-user@freebsd.org>
List-Help: <mailto:svn-src-user-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-user>,
	<mailto:svn-src-user-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Jun 2009 23:03:38 -0000

Author: kmacy
Date: Mon Jun  8 23:03:37 2009
New Revision: 193778
URL: http://svn.freebsd.org/changeset/base/193778

Log:
  try to avoid false sharing with lock_profile_enable

Modified:
  user/kmacy/releng_7_2_fcs/sys/kern/subr_lock.c

Modified: user/kmacy/releng_7_2_fcs/sys/kern/subr_lock.c
==============================================================================
--- user/kmacy/releng_7_2_fcs/sys/kern/subr_lock.c	Mon Jun  8 22:58:12 2009	(r193777)
+++ user/kmacy/releng_7_2_fcs/sys/kern/subr_lock.c	Mon Jun  8 23:03:37 2009	(r193778)
@@ -188,14 +188,14 @@ struct lock_prof_cpu {
 
 struct lock_prof_cpu *lp_cpu[MAXCPU];
 
+static int lock_prof_skipspin __aligned(128);
 volatile int lock_prof_enable = 0;
-static volatile int lock_prof_resetting __aligned(64);
+static volatile int lock_prof_resetting __aligned(128);
 
 /* SWAG: sbuf size = avg stat. line size * number of locks */
 #define LPROF_SBUF_SIZE		256 * 400
 
 static int lock_prof_rejected;
-static int lock_prof_skipspin;
 static int lock_prof_skipcount;
 
 #ifndef USE_CPU_NANOSECONDS