From owner-cvs-src@FreeBSD.ORG Sun May 23 20:55:31 2004 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 52A5C16A4CF for ; Sun, 23 May 2004 20:55:31 -0700 (PDT) Received: from root.org (root.org [67.118.192.226]) by mx1.FreeBSD.org (Postfix) with SMTP id 3B2A343D2F for ; Sun, 23 May 2004 20:55:31 -0700 (PDT) (envelope-from nate@root.org) Received: (qmail 66577 invoked by uid 1000); 24 May 2004 03:54:43 -0000 Date: Sun, 23 May 2004 20:54:42 -0700 (PDT) From: Nate Lawson To: Bruce Evans In-Reply-To: <20040523183858.7C3DA16A557@hub.freebsd.org> Message-ID: <20040523205250.T66525@root.org> References: <20040523183858.7C3DA16A557@hub.freebsd.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: cvs-src@FreeBSD.org cc: src-committers@FreeBSD.org cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/conf files.amd64 X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 May 2004 03:55:31 -0000 On Sun, 23 May 2004, Bruce Evans wrote: > The SMP case hasn't been tested. The high resolution subcase of this uses > the i8254, and as on i386's, the locking for this is deficient and the > i8254 is too inefficient. The acpi timer is also too inefficient. The ACPI timer is significantly better than it used to be. It is currently just a bus_space_read, which maps directly to inl. The fact that IO ports are slow is inescapable. -Nate