From owner-svn-src-all@FreeBSD.ORG Mon May 4 19:22:17 2009 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F187F1065689; Mon, 4 May 2009 19:22:16 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id C327D8FC08; Mon, 4 May 2009 19:22:16 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 613C246B8E; Mon, 4 May 2009 15:22:16 -0400 (EDT) Received: from jhbbsd.hudson-trading.com (unknown [209.249.190.8]) by bigwig.baldwin.cx (Postfix) with ESMTPA id 55D248A022; Mon, 4 May 2009 15:22:15 -0400 (EDT) From: John Baldwin To: Alexander Motin Date: Mon, 4 May 2009 09:41:00 -0400 User-Agent: KMail/1.9.7 References: <200905031747.n43HlLHD020054@svn.freebsd.org> In-Reply-To: <200905031747.n43HlLHD020054@svn.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200905040941.00641.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Mon, 04 May 2009 15:22:15 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-1.5 required=4.2 tests=AWL,BAYES_00, DATE_IN_PAST_03_06,RDNS_NONE autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r191766 - in head/sys: amd64/include amd64/isa i386/bios i386/include i386/isa i386/xen isa pc98/cbus X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 May 2009 19:22:17 -0000 On Sunday 03 May 2009 1:47:21 pm Alexander Motin wrote: > Author: mav > Date: Sun May 3 17:47:21 2009 > New Revision: 191766 > URL: http://svn.freebsd.org/changeset/base/191766 > > Log: > Rename statclock_disable variable to atrtcclock_disable that it actually is, > and hide it inside of atrtc driver. Add new tunable hint.atrtc.0.clock > controlling it. Setting it to 0 disables using RTC clock as stat-/ > profclock sources. > > Teach i386 and amd64 SMP platforms to emulate stat-/profclocks using i8254 > hardclock, when LAPIC and RTC clocks are disabled. > > This allows to reduce global interrupt rate of idle system down to about > 100 interrupts per core, permitting C3 and deeper C-states provide maximum > CPU power efficiency. Note that IRQ0 is not going to work for many systems with the local APIC since I removed the mixed-mode handling from the x86 interrupt code. -- John Baldwin