From owner-freebsd-arch@FreeBSD.ORG  Sat Nov 18 21:55:20 2006
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
X-Original-To: freebsd-arch@freebsd.org
Delivered-To: freebsd-arch@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 7A17F16A500
	for <freebsd-arch@freebsd.org>; Sat, 18 Nov 2006 21:55:20 +0000 (UTC)
	(envelope-from freebsd-arch@m.gmane.org)
Received: from ciao.gmane.org (main.gmane.org [80.91.229.2])
	by mx1.FreeBSD.org (Postfix) with ESMTP id C660243D68
	for <freebsd-arch@freebsd.org>; Sat, 18 Nov 2006 21:55:11 +0000 (GMT)
	(envelope-from freebsd-arch@m.gmane.org)
Received: from list by ciao.gmane.org with local (Exim 4.43)
	id 1GlY9a-0002S5-4g
	for freebsd-arch@freebsd.org; Sat, 18 Nov 2006 22:55:14 +0100
Received: from 89-172-42-36.adsl.net.t-com.hr ([89.172.42.36])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-arch@freebsd.org>; Sat, 18 Nov 2006 22:55:14 +0100
Received: from ivoras by 89-172-42-36.adsl.net.t-com.hr with local (Gmexim 0.1
	(Debian)) id 1AlnuQ-0007hv-00
	for <freebsd-arch@freebsd.org>; Sat, 18 Nov 2006 22:55:14 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-arch@freebsd.org
From: Ivan Voras <ivoras@fer.hr>
Date: Sat, 18 Nov 2006 22:55:12 +0100
Lines: 9
Message-ID: <ejnvfo$tv2$1@sea.gmane.org>
References: <20061119041421.I16763@delplex.bde.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@sea.gmane.org
X-Gmane-NNTP-Posting-Host: 89-172-42-36.adsl.net.t-com.hr
User-Agent: Thunderbird 1.5.0.4 (X11/20060615)
In-Reply-To: <20061119041421.I16763@delplex.bde.org>
Sender: news <news@sea.gmane.org>
Subject: Re: What is the PREEMPTION option good for?
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 18 Nov 2006 21:55:20 -0000

Bruce Evans wrote:

> Most of the difference is caused by pgzero becoming too active with
> PREEMPTION.  

Don't know about the other things but I've noticed pagezero is
suspiciously active on heavy loaded SMP web servers (even complained on
@stable a long time ago). I'll try disabling PREEMPTION and see how it goes.