From owner-freebsd-current@FreeBSD.ORG Fri Mar 27 17:31:29 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7A719106566B; Fri, 27 Mar 2009 17:31:29 +0000 (UTC) (envelope-from phk@critter.freebsd.dk) Received: from phk.freebsd.dk (phk.freebsd.dk [130.225.244.222]) by mx1.freebsd.org (Postfix) with ESMTP id 3C2418FC14; Fri, 27 Mar 2009 17:31:29 +0000 (UTC) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (critter.freebsd.dk [192.168.61.3]) by phk.freebsd.dk (Postfix) with ESMTP id 2C7B578CD0; Fri, 27 Mar 2009 17:31:28 +0000 (UTC) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.14.3/8.14.3) with ESMTP id n2RHVRVO005740; Fri, 27 Mar 2009 17:31:27 GMT (envelope-from phk@critter.freebsd.dk) To: Scott Long From: "Poul-Henning Kamp" In-Reply-To: Your message of "Fri, 27 Mar 2009 10:51:17 CST." <49CD0405.1060704@samsco.org> Date: Fri, 27 Mar 2009 17:31:27 +0000 Message-ID: <5739.1238175087@critter.freebsd.dk> Sender: phk@critter.freebsd.dk Cc: attilio@freebsd.org, freebsd-hackers@freebsd.org, Sergey Babkin , prashant.vaibhav@gmail.com, freebsd-current@freebsd.org Subject: Re: Improving the kernel/i386 timecounter performance (GSoC proposal) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Mar 2009 17:31:30 -0000 In message <49CD0405.1060704@samsco.org>, Scott Long writes: >I've been talking about this for years. All I need is help with the VM >magic to create the page on fork. I also want two pages, one global >for gettimeofday (and any other global data we can think of) and one >per-process for static data like getpid/getgid. Agreed, that is a good place to start. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.