From owner-freebsd-hackers@FreeBSD.ORG  Sun Apr 13 16:36:52 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id ADA5E37B405; Sun, 13 Apr 2003 16:36:52 -0700 (PDT)
Received: from sabre.velocet.net (sabre.velocet.net [216.138.209.205])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 79EC443FBF; Sun, 13 Apr 2003 16:36:51 -0700 (PDT)
	(envelope-from dgilbert@velocet.ca)
Received: from trooper.velocet.ca (trooper.velocet.net [216.138.242.2])
	by sabre.velocet.net (Postfix) with ESMTP
	id E4913137FFE; Sun, 13 Apr 2003 19:36:49 -0400 (EDT)
Received: by trooper.velocet.ca (Postfix, from userid 66)
	id 78D4874A44; Sun, 13 Apr 2003 19:36:49 -0400 (EDT)
Received: by canoe.velocet.net (Postfix, from userid 101)
	id DE73056791B; Sun, 13 Apr 2003 19:36:45 -0400 (EDT)
From: David Gilbert <dgilbert@velocet.ca>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <16025.62605.808335.650450@canoe.velocet.net>
Date: Sun, 13 Apr 2003 19:36:45 -0400
To: Mike Silbersack <silby@silby.com>
In-Reply-To: <20030401095201.O1612@odysseus.silby.com>
References: <20030401123319.GA8399@comp.chem.msu.su>
	<32984.1049200665@critter.freebsd.dk>
	<20030401131616.GA11282@comp.chem.msu.su>
	<20030401095201.O1612@odysseus.silby.com>
X-Mailer: VM 7.07 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid
cc: Yar Tikhiy <yar@freebsd.org>
cc: hackers@freebsd.org
cc: Poul-Henning Kamp <phk@phk.freebsd.dk>
Subject: Expensive MII code (was Re: "Expensive timeout(9) function...")
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 13 Apr 2003 23:36:53 -0000


Mike> The _tick routines are not easy to fix, FWIW.  MII access
Mike> functions are quite time consuming almost any way you look at
Mike> it.

Mike> Well, actually, I figured out a way to make them much faster,
Mike> but it's been a few months since I looked at that patch, I guess
Mike> I should pull it back up and post it somewhere...

Expensive, certainly.  The em driver locks up the whole machine for
several seconds when ifconfig'ing cards.

Dave.

-- 
============================================================================
|David Gilbert, Velocet Communications.       | Two things can only be     |
|Mail:       dgilbert@velocet.net             |  equal if and only if they |
|http://daveg.ca                              |   are precisely opposite.  |
=========================================================GLO================