From owner-freebsd-current@FreeBSD.ORG Thu Dec 11 19:51:11 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 39D4416A4CE for ; Thu, 11 Dec 2003 19:51:11 -0800 (PST) Received: from postal3.es.net (proxy.es.net [198.128.3.207]) by mx1.FreeBSD.org (Postfix) with ESMTP id B01C543D31 for ; Thu, 11 Dec 2003 19:51:09 -0800 (PST) (envelope-from oberman@es.net) Received: from ptavv.es.net ([198.128.4.29]) by postal3.es.net (Postal Node 3) with ESMTP (SSL) id IBA74465; Thu, 11 Dec 2003 19:51:07 -0800 Received: from ptavv (localhost [127.0.0.1]) by ptavv.es.net (Tachyon Server) with ESMTP id 1A11B5D08; Thu, 11 Dec 2003 19:51:06 -0800 (PST) To: Nate Lawson In-Reply-To: Message from Nate Lawson of "Tue, 09 Dec 2003 17:57:53 PST." <20031209175230.I44055@root.org> Date: Thu, 11 Dec 2003 19:51:06 -0800 From: "Kevin Oberman" Message-Id: <20031212035106.1A11B5D08@ptavv.es.net> cc: acpi-jp@jp.freebsd.org cc: current@freebsd.org Subject: Re: ACPI throttling changes X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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, 12 Dec 2003 03:51:11 -0000 > Date: Tue, 9 Dec 2003 17:57:53 -0800 (PST) > From: Nate Lawson > Sender: owner-freebsd-current@freebsd.org > > I'm working on a shared CPU frequency control driver. One step is to > remove some of the autonomy of the throttling portion of acpi_cpu. > Please test this patch if you have a machine which supports throttling. > With this patch, throttling can be changed by doing: > > sysctl hw.acpi.cpu.current_speed=X > > where X is some number between 1 and hw.acpi.cpu.max_speed. It is no > longer driven by AC line transitions. Run a CPU benchmark like this one > to make sure the throttling transition still works with this patch. > > dd if=/dev/zero bs=1m count=500 | md5 > > This is part of a larger work. Don't worry, it won't be committed until > general CPU frequency control is done so no loss of functionality will be > committed. Nate, My results are much like Lukas. I see no difference between 1 and 45 About 11.2 seconds. For 6 and 7 I see 7.8 seconds and for 8 I get about 6.6 seconds. I will append the results. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 hw.acpi.cpu.max_speed: 8 hw.acpi.cpu.current_speed: 8 hw.acpi.cpu.cx_supported: C1/0 C2/1 C3/85 hw.acpi.cpu.cx_lowest: 0 hw.acpi.cpu.cx_history: 25958/0 0/0 0/0 puppeteer# sysctl hw.acpi.cpu.current_speed=1 hw.acpi.cpu.current_speed: 5 -> 1 puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 11.202089 secs (46802699 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# sysctl hw.acpi.cpu.current_speed=5 hw.acpi.cpu.current_speed: 1 -> 5 puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 11.201044 secs (46807066 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# sysctl hw.acpi.cpu.current_speed=6 hw.acpi.cpu.current_speed: 5 -> 6 puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 7.854794 secs (66747517 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 7.892137 secs (66431690 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# sysctl hw.acpi.cpu.current_speed=7 hw.acpi.cpu.current_speed: 6 -> 7 puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 7.861369 secs (66691692 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 7.860654 secs (66697758 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# sysctl hw.acpi.cpu.current_speed=8 hw.acpi.cpu.current_speed: 7 -> 8 puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 6.581416 secs (79661884 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 6.593236 secs (79519071 bytes/sec) d8b61b2c0025919d5321461045c8226f puppeteer# dd if=/dev/zero bs=1m count=500 | md5 500+0 records in 500+0 records out 524288000 bytes transferred in 6.571190 secs (79785853 bytes/sec) d8b61b2c0025919d5321461045c8226f