From owner-freebsd-hackers Wed Feb 20 1:58:11 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from gull.prod.itd.earthlink.net (gull.mail.pas.earthlink.net [207.217.120.84]) by hub.freebsd.org (Postfix) with ESMTP id E378E37B402 for ; Wed, 20 Feb 2002 01:58:05 -0800 (PST) Received: from pool0143.cvx22-bradley.dialup.earthlink.net ([209.179.198.143] helo=mindspring.com) by gull.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16dTVg-0002wV-00; Wed, 20 Feb 2002 01:58:00 -0800 Message-ID: <3C73731E.B0339E2D@mindspring.com> Date: Wed, 20 Feb 2002 01:57:50 -0800 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Eugene Panchenko Cc: hackers@freebsd.org Subject: Re: Task activation delays: FreeBSD versus Linux? References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Eugene Panchenko wrote: > gretings. > > As seen on kerneltrap.org: > --- > Andrew Morton: Ingo Molnar broke the ground here with his > 2.2.12 patch which demonstrated that Linux could fairly > easily yield task activation delays which are one to two > orders of magnitude better than any competing operating > system. > --- > > is this a truth ? about "orders of magnitude" ? does FreeBSD > fall under "any competing operating system"? What is it? You left off the URL. Looking on the site, it's not posted to the front, and the search function does not locate the article. To answer your questions, you'll have to provide more information. A Linux patch number doesn't cut it. I expect that this is talking about exec pre-forking; if so, then yes, it can yield some minor speedup, but you should not expect much in common applications which fork and do not exec (e.g. Apache). There are a number of micro-benchmarks that could make this approach look good, though... -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message