From owner-svn-src-head@freebsd.org Wed Aug 26 16:36:42 2015 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 43B9E9C35AB; Wed, 26 Aug 2015 16:36:42 +0000 (UTC) (envelope-from gnn@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3479D1164; Wed, 26 Aug 2015 16:36:42 +0000 (UTC) (envelope-from gnn@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id t7QGagov041883; Wed, 26 Aug 2015 16:36:42 GMT (envelope-from gnn@FreeBSD.org) Received: (from gnn@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id t7QGag96041882; Wed, 26 Aug 2015 16:36:42 GMT (envelope-from gnn@FreeBSD.org) Message-Id: <201508261636.t7QGag96041882@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: gnn set sender to gnn@FreeBSD.org using -f From: "George V. Neville-Neil" Date: Wed, 26 Aug 2015 16:36:42 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r287166 - head/sys/kern X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Aug 2015 16:36:42 -0000 Author: gnn Date: Wed Aug 26 16:36:41 2015 New Revision: 287166 URL: https://svnweb.freebsd.org/changeset/base/287166 Log: Summary: Add the interactivity equations to the header comment for our interactivity calculation routine. Suggested by: rwatson Modified: head/sys/kern/sched_ule.c Modified: head/sys/kern/sched_ule.c ============================================================================== --- head/sys/kern/sched_ule.c Wed Aug 26 13:23:56 2015 (r287165) +++ head/sys/kern/sched_ule.c Wed Aug 26 16:36:41 2015 (r287166) @@ -1450,6 +1450,21 @@ sched_initticks(void *dummy) * a [0, 100] integer. This is the voluntary sleep time of a process, which * differs from the cpu usage because it does not account for time spent * waiting on a run-queue. Would be prettier if we had floating point. + * + * When a thread's sleep time is greater than its run time the + * calculation is: + * + * scaling factor + * interactivity score = --------------------- + * sleep time / run time + * + * + * When a thread's run time is greater than its sleep time the + * calculation is: + * + * scaling factor + * interactivity score = --------------------- + scaling factor + * run time / sleep time */ static int sched_interact_score(struct thread *td)