From owner-cvs-src-old@FreeBSD.ORG Tue Nov 18 13:24:45 2008 Return-Path: Delivered-To: cvs-src-old@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E102910656F5 for ; Tue, 18 Nov 2008 13:24:45 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id D0EB98FC1F for ; Tue, 18 Nov 2008 13:24:45 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id mAIDOjU3047020 for ; Tue, 18 Nov 2008 13:24:45 GMT (envelope-from mav@repoman.freebsd.org) Received: (from svn2cvs@localhost) by repoman.freebsd.org (8.14.3/8.14.3/Submit) id mAIDOjlo047019 for cvs-src-old@freebsd.org; Tue, 18 Nov 2008 13:24:45 GMT (envelope-from mav@repoman.freebsd.org) Message-Id: <200811181324.mAIDOjlo047019@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to mav@repoman.freebsd.org using -f From: Alexander Motin Date: Tue, 18 Nov 2008 13:24:38 +0000 (UTC) To: cvs-src-old@freebsd.org X-FreeBSD-CVS-Branch: HEAD Subject: cvs commit: src/usr.sbin/powerd powerd.8 powerd.c X-BeenThere: cvs-src-old@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: **OBSOLETE** CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Nov 2008 13:24:46 -0000 mav 2008-11-18 13:24:38 UTC FreeBSD src repository Modified files: usr.sbin/powerd powerd.8 powerd.c Log: SVN rev 185050 on 2008-11-18 13:24:38Z by mav Set of powerd enchancements: 1. Make it more SMP polite. Previous version uses average CPU load that often leads to load underestimation. It make powerd with default configuration unusable on systems with more then 2 CPUs. I propose to use summary load instead of average one. IMO this is the best we can do without specially tuned scheduler. Also as soon as measuring total load on SMP systems is more useful then total idle, I have switched to it. 2. Make powerd's operation independent from number and size of frequency levels. I have added internal frequency counter which translated into real frequencies only on a last stage and only as good as gone. Some systems may have only several power levels, while others - many of them, so adaptation time with previous approach was completely different. 3. As part of previous I have changed adaptive mode to rise frequency on demand up to 2 times and fall on 1/8 per time internal. 4. For desktop (AC-powered) systems I have added one more mode - "hiadaptive". It rises frequency twice faster, drops it 4 times slower, prefers twice lower CPU load and has additional delay before leaving the highest frequency after the period of maximum load. This mode was specially made to improve interactivity of the systems where operation capabilities are more significant then power consumption, but keeping maximum frequency all the time is not needed. 5. I have reduced default polling interval from 1/2 to 1/4 of second. It is not so important for algorithm math now, but gives better system interactivity. Discussed on: mobile@ Revision Changes Path 1.12 +11 -10 src/usr.sbin/powerd/powerd.8 1.24 +143 -79 src/usr.sbin/powerd/powerd.c