From owner-freebsd-current  Sun Feb 24 21:26:30 2002
Delivered-To: freebsd-current@freebsd.org
Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2])
	by hub.freebsd.org (Postfix) with ESMTP
	id 806E737B404; Sun, 24 Feb 2002 21:26:25 -0800 (PST)
Received: (from dillon@localhost)
	by apollo.backplane.com (8.11.6/8.9.1) id g1P5QPU44837;
	Sun, 24 Feb 2002 21:26:25 -0800 (PST)
	(envelope-from dillon)
Date: Sun, 24 Feb 2002 21:26:25 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <200202250526.g1P5QPU44837@apollo.backplane.com>
To: Jake Burkholder <jake@locore.ca>, Bruce Evans <bde@zeta.org.au>,
	Terry Lambert <tlambert2@mindspring.com>,
	Alfred Perlstein <alfred@FreeBSD.ORG>,
	Bosko Milekic <bmilekic@unixdaemons.com>,
	Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>,
	current@FreeBSD.ORG, John Baldwin <jhb@FreeBSD.ORG>
Subject: Re: Patch for critical_enter()/critical_exit() & interrupt assembly revamp, please review!
References: <20020224131027.I31343-100000@gamplex.bde.org> <200202241912.g1OJCMx95238@apollo.backplane.com> <20020224224927.D35990@locore.ca> 
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-current.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-current>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-current>
X-Loop: FreeBSD.ORG


:    Removing cli and sti from the critical functions saves us 300 ns on

    I'm going to make a correction here... I didn't realize I had WITNESS
    turned on.  300ns of savings makes a lot of sense when WITNESS is turned
    on because witness manipulates a number of spin locks.

    I am going to rerun the test on a 2xCPU box without WITNESS.

					-Matt

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message