From owner-cvs-all Mon Jul 17 4:14:14 2000 Delivered-To: cvs-all@freebsd.org Received: from finch-post-10.mail.demon.net (finch-post-10.mail.demon.net [194.217.242.38]) by hub.freebsd.org (Postfix) with ESMTP id D91D837B940; Mon, 17 Jul 2000 04:14:06 -0700 (PDT) (envelope-from n_hibma@qubesoft.com) Received: from calcaphon.demon.co.uk ([193.237.19.5] helo=bluebottle.qubesoft.com) by finch-post-10.mail.demon.net with esmtp (Exim 2.12 #1) id 13E8qa-00040p-0A; Mon, 17 Jul 2000 11:14:05 +0000 Received: from henny.webweaving.org (henny.qubesoft.com [192.168.1.5]) by bluebottle.qubesoft.com (8.9.3/8.9.1) with ESMTP id MAA96553; Mon, 17 Jul 2000 12:14:02 +0100 (BST) (envelope-from n_hibma@qubesoft.com) Received: from localhost (localhost [127.0.0.1]) by henny.webweaving.org (8.9.3/8.9.3) with ESMTP id MAA04084; Mon, 17 Jul 2000 12:05:19 +0100 (BST) (envelope-from n_hibma@qubesoft.com) Date: Mon, 17 Jul 2000 12:05:19 +0100 (BST) From: Nick Hibma X-Sender: n_hibma@localhost Reply-To: Nick Hibma To: Bill Fumerola Cc: Matt Dillon , "Jordan K. Hubbard" , Peter Wemm , cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.sbin/usbd usbd.c In-Reply-To: <20000716185255.J51462@jade.chc-chimes.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > AJ ? Guys, 'J' as a default to malloc.conf is a disaster for performance. > > There are many programs which allocate large buffers and only use > > small portions of them. We *CANNOT* ship with 'J' as a default > > for malloc. > > > > 'A', ok. 'AH' is even better. 'AJ'? no way. > > The change was made to weed out bugs and will be ripped out before any release is > made. This would be similar to including INVARIANTS and company in GENERIC until > 5.0-RC. One problem is that the performance hit incurred by some change is less obvious and too easy to be blamed on the chagne to malloc. So it might be an idea to remove the J once in a while and have a look at performance again. After all, most of the problems are going to be found within the first few weeks of switching the flag on. Nick -- n_hibma@webweaving.org n_hibma@freebsd.org USB project http://www.etla.net/~n_hibma/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message