From owner-freebsd-ports-bugs@FreeBSD.ORG Sat Jan 12 08:30:03 2008 Return-Path: Delivered-To: freebsd-ports-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3BD5916A41A for ; Sat, 12 Jan 2008 08:30:03 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 1D73C13C455 for ; Sat, 12 Jan 2008 08:30:03 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id m0C8U1rN070466 for ; Sat, 12 Jan 2008 08:30:01 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id m0C8U1wO070465; Sat, 12 Jan 2008 08:30:01 GMT (envelope-from gnats) Resent-Date: Sat, 12 Jan 2008 08:30:01 GMT Resent-Message-Id: <200801120830.m0C8U1wO070465@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-ports-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, KOIE Hidetaka Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 50EEF16A41B for ; Sat, 12 Jan 2008 08:22:12 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id 431C313C455 for ; Sat, 12 Jan 2008 08:22:12 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.2/8.14.2) with ESMTP id m0C8L1KY093326 for ; Sat, 12 Jan 2008 08:21:01 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.2/8.14.1/Submit) id m0C8L1Ut093325; Sat, 12 Jan 2008 08:21:01 GMT (envelope-from nobody) Message-Id: <200801120821.m0C8L1Ut093325@www.freebsd.org> Date: Sat, 12 Jan 2008 08:21:01 GMT From: KOIE Hidetaka To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: ports/119589: default parameter of powerd is unsuitable for multi core system. X-BeenThere: freebsd-ports-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Ports bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Jan 2008 08:30:03 -0000 >Number: 119589 >Category: ports >Synopsis: default parameter of powerd is unsuitable for multi core system. >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-ports-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Sat Jan 12 08:30:01 UTC 2008 >Closed-Date: >Last-Modified: >Originator: KOIE Hidetaka >Release: FreeBSD 8.0-CURRENT amd64 >Organization: surigiken >Environment: FreeBSD guriandgura 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Sat Jan 5 16:35: 45 JST 2008 koie@guriandgura:/usr/obj/usr/src/sys/GURIANDGURA amd64 >Description: On multi core system, powerd will not increase performance. For example, if NCPU=4 and one process consumes a CPU, system-wide CPU idle is >= 75%. Because the threashold is 65% by default, powerd never increase performace. >How-To-Repeat: >Fix: Change default setting: DEFAULT_ACTIVE_PERCENT = (100 * (NCPU - 1) + 65) / NCPU, DEFAULT_IDLE_PERCENT = (100 * (NCPU - 1) + 90) / NCPU. if NCPU=4, DEFAULT_ACTIVE_PERCENT = 91, DEFAULT_IDLE_PERCENT = 97. Or, powerd polls per-core CPU statistics kern.cp_times and increases performance when any CPU is busy. Or, kernel and powerd support per-core power management. >Release-Note: >Audit-Trail: >Unformatted: