From owner-freebsd-performance@FreeBSD.ORG Wed Oct 24 15:46:35 2007 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DD94916A420 for ; Wed, 24 Oct 2007 15:46:35 +0000 (UTC) (envelope-from josh.carroll@gmail.com) Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.176]) by mx1.freebsd.org (Postfix) with ESMTP id B32D313C4B2 for ; Wed, 24 Oct 2007 15:46:34 +0000 (UTC) (envelope-from josh.carroll@gmail.com) Received: by py-out-1112.google.com with SMTP id u77so183952pyb for ; Wed, 24 Oct 2007 08:46:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=oxSs5n34RP4qbS9a+nSwV+s4h0R99Wakqs31AeGabcc=; b=WFEC1ae7C0CkPvxd9IE0s2XGgchqWnhGuTX4JWWhjd1K8kljKqqvXvLaQBmI18CecD46WezoEu5cH7KIsbDbcqjUuvop8RrjR1o0z+IUbbazhE/7ikw5uDorLMR27+6ptgSHWB3lITa2kkLR05S5fX3f0DWT93TvI5zS/65CipY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=AiSlNZyAEQDkD4pB2DT+tXjHoEf6n5O4ZoX5kHJnypFi5cy8F8Hg4JTJWiAfHPo5C4ucCYAe+LYhnw/QkNudERVVLAFaPf8ZnXGp0bH+4ZTvonZUVGVsO0ZrcIhUj43wqsnRHfq1OqD/8vg6rS0y8gYqcTBPHV3AbSR3N10Vab8= Received: by 10.35.44.16 with SMTP id w16mr867571pyj.1193240392953; Wed, 24 Oct 2007 08:39:52 -0700 (PDT) Received: by 10.35.117.12 with HTTP; Wed, 24 Oct 2007 08:39:52 -0700 (PDT) Message-ID: <8cb6106e0710240839h1a59f9f9y919e6b297c3efb8e@mail.gmail.com> Date: Wed, 24 Oct 2007 11:39:52 -0400 From: "Josh Carroll" To: "Nick Evans" In-Reply-To: <20071024113434.326c3749@pleiades.nextvenue.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <8cb6106e0710230902x4edf2c8eu2d912d5de1f5d4a2@mail.gmail.com> <471E343C.2040509@FreeBSD.org> <20071024171915.E84143@delplex.bde.org> <8cb6106e0710240639r20e03ce9w81ed3354338b7395@mail.gmail.com> <20071024113434.326c3749@pleiades.nextvenue.com> Cc: remy.nonnenmacher@activnetworks.com, Kris Kennaway , freebsd-performance@freebsd.org, Bruce Evans Subject: Re: ULE vs. 4BSD in RELENG_7 X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: josh.carroll@gmail.com List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Oct 2007 15:46:36 -0000 > kern.sched.steal_thresh is/was one of the more effective tuning sysctls. rev > 1.205 of sched_ule had a change that was supposed to automatically adjust it > based on the number of cores. Is this the same 8 core system as the > other thread? In that case the commit dictates steal_thresh should be set to > 3. Give that a try. This is a quad core (single cpu) system. Do these values look proper then? kern.sched.steal_thresh: 2 kern.sched.steal_idle: 1 kern.sched.steal_htt: 1 Thanks, Josh