From owner-freebsd-hackers@FreeBSD.ORG Fri Nov 19 16:57:44 2010 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 248CD106564A; Fri, 19 Nov 2010 16:57:44 +0000 (UTC) (envelope-from avg@freebsd.org) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id 0F87E8FC16; Fri, 19 Nov 2010 16:57:42 +0000 (UTC) Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua [212.40.38.101]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id SAA16273; Fri, 19 Nov 2010 18:57:41 +0200 (EET) (envelope-from avg@freebsd.org) Message-ID: <4CE6AC85.9040802@freebsd.org> Date: Fri, 19 Nov 2010 18:57:41 +0200 From: Andriy Gapon User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.2.12) Gecko/20101029 Lightning/1.0b2 Thunderbird/3.1.6 MIME-Version: 1.0 To: freebsd-hackers@freebsd.org, Alexander Motin X-Enigmail-Version: 1.1.2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Subject: statclock(n) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Nov 2010 16:57:44 -0000 Alexander, I wonder if instead of calling statclock() multiple times (after an idle period) we couldn't call it just with an appropriate N parameter. So some stats like e.g. cp_time[] could do +=N instead of ++. Other stats ru_ixrss need to be updated only once. Similarly, N could be passed further down to sched_clock() and handled there too. -- Andriy Gapon