From owner-freebsd-current@FreeBSD.ORG Fri Mar 27 20:08:15 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 3EC411065674 for ; Fri, 27 Mar 2009 20:08:15 +0000 (UTC) (envelope-from julian@elischer.org) Received: from outN.internet-mail-service.net (outn.internet-mail-service.net [216.240.47.237]) by mx1.freebsd.org (Postfix) with ESMTP id 1DFC18FC25 for ; Fri, 27 Mar 2009 20:08:14 +0000 (UTC) (envelope-from julian@elischer.org) Received: from idiom.com (mx0.idiom.com [216.240.32.160]) by out.internet-mail-service.net (Postfix) with ESMTP id 604FE961D8; Fri, 27 Mar 2009 13:08:50 -0700 (PDT) X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e Received: from julian-mac.elischer.org (home.elischer.org [216.240.48.38]) by idiom.com (Postfix) with ESMTP id E4C092D6037; Fri, 27 Mar 2009 13:08:11 -0700 (PDT) Message-ID: <49CD3242.8050802@elischer.org> Date: Fri, 27 Mar 2009 13:08:34 -0700 From: Julian Elischer User-Agent: Thunderbird 2.0.0.21 (Macintosh/20090302) MIME-Version: 1.0 To: Scott Long References: <11609492.9579.1238167614335.JavaMail.root@vms070.mailsrvcs.net> <49CD0405.1060704@samsco.org> <49CD1B3D.3030103@samsco.org> In-Reply-To: <49CD1B3D.3030103@samsco.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Sergey Babkin , freebsd-hackers@FreeBSD.org, attilio@FreeBSD.org, phk@phk.freebsd.dk, freebsd-current@FreeBSD.org, Robert Watson , prashant.vaibhav@gmail.com 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 20:08:15 -0000 Scott Long wrote: > Robert Watson wrote: >> >> On Fri, 27 Mar 2009, Scott Long wrote: >> >>> 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. >> >> FWIW, there are some variations in schemes across OS's -- one extreme >> is the Linux approach, which actually exports a mini shared library in >> ELF format on the shared page, providing implementations of various >> services (such as entering system calls), time stuff, etc. Less >> extreme are the shared pages offered on Mac OS X, etc. >> > > Yes, but I'd like to start somewhere, and considering that it's been > impossible in _5_ years to get the 30 minutes of Peter or JeffR or JHB > time to get the basic VM magic done, I'm keeping my expectations as > modest as possible. try alc.. :-) > > Scott > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"