From owner-freebsd-threads@FreeBSD.ORG  Fri Sep 25 00:40:06 2009
Return-Path: <owner-freebsd-threads@FreeBSD.ORG>
Delivered-To: freebsd-threads@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 3C3DD106566B
	for <freebsd-threads@hub.freebsd.org>;
	Fri, 25 Sep 2009 00:40:06 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 11FE08FC0C
	for <freebsd-threads@hub.freebsd.org>;
	Fri, 25 Sep 2009 00:40:06 +0000 (UTC)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id n8P0e402025737
	for <freebsd-threads@freefall.freebsd.org>;
	Fri, 25 Sep 2009 00:40:04 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.3/8.14.3/Submit) id n8P0e4MU025736;
	Fri, 25 Sep 2009 00:40:04 GMT (envelope-from gnats)
Date: Fri, 25 Sep 2009 00:40:04 GMT
Message-Id: <200909250040.n8P0e4MU025736@freefall.freebsd.org>
To: freebsd-threads@FreeBSD.org
From: David Xu <davidxu@freebsd.org>
Cc: 
Subject: Re: threads/128922: threads hang with xorg running
X-BeenThere: freebsd-threads@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: David Xu <davidxu@freebsd.org>
List-Id: Threading on FreeBSD <freebsd-threads.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>, 
	<mailto:freebsd-threads-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-threads>
List-Post: <mailto:freebsd-threads@freebsd.org>
List-Help: <mailto:freebsd-threads-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>,
	<mailto:freebsd-threads-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 25 Sep 2009 00:40:06 -0000

The following reply was made to PR threads/128922; it has been noted by GNATS.

From: David Xu <davidxu@freebsd.org>
To: bug-followup@freebsd.org, dreigcht@gmail.com
Cc:  
Subject: Re: threads/128922: threads hang with xorg running
Date: Fri, 25 Sep 2009 08:31:10 +0800

 Try to set scheduler's preemption threshold to large priority value,
 the default one is too low for cpu-bound application, and can starve
 other threads under heavy cpu load. for example:
 sysctl kern.sched.preempt_thresh=220
 
 On 7.x and 8.0 kernel, I always set a large value for my Desktop PC.
 
 Regards,
 David Xu