From owner-freebsd-current  Sun Feb 24 22:49:37 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 5A25437B417; Sun, 24 Feb 2002 22:49:16 -0800 (PST)
Received: (from dillon@localhost)
	by apollo.backplane.com (8.11.6/8.9.1) id g1P6nF746587;
	Sun, 24 Feb 2002 22:49:15 -0800 (PST)
	(envelope-from dillon)
Date: Sun, 24 Feb 2002 22:49:15 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <200202250649.g1P6nF746587@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: critical_enter()/critical_exit() overheads in an SMP system
References: <20020224131027.I31343-100000@gamplex.bde.org> <200202241912.g1OJCMx95238@apollo.backplane.com> <20020224224927.D35990@locore.ca>   <200202250603.g1P63fu46331@apollo.backplane.com>
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


:pid 214 guid/sec 687816		Two TU's running, old critical_*()
:pid 214 guid/sec 687632		1.454 uS/call
:pid 214 guid/sec 687857
:pid 214 guid/sec 687887
:pid 214 guid/sec 667454		new critical_*()
:pid 214 guid/sec 667562		1.496 uS/call		--> 41 nS
:pid 214 guid/sec 668551
:pid 214 guid/sec 668686
:pid 214 guid/sec 668789

    Boy, I'm batting 0 tonight!  Those numbers are reversed :-).  
    new_critical is the top number (the faster 1.454 uS/call) and
    old_critical is the bottom number (1.496 uS/call).

						-Matt


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