From owner-freebsd-stable@FreeBSD.ORG Sat Dec 10 00:59:29 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DC60D1065678 for ; Sat, 10 Dec 2011 00:59:29 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id 6F5DF8FC0C for ; Sat, 10 Dec 2011 00:59:29 +0000 (UTC) Received: by wgbdr11 with SMTP id dr11so6691692wgb.31 for ; Fri, 09 Dec 2011 16:59:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=tNaIfXhhU2eaaBZUVZt9tSWV7qCRtlxano+0ConnM9U=; b=YnrbSu0HahnWuAj26X1n1ZLkX8JTeohl6yKVsKECEEzVyuc/X7uS0PRiPQ0JzOXSei QReQMsCz2ch5tykfeBS1mYBS6rHUONouSsJM7xPysH32N+7kODoKpvT/xZPz5rzF07OS rrlE70mqZDrMShBbzsXBWTjQswbrw8x0ttD6o= MIME-Version: 1.0 Received: by 10.227.197.70 with SMTP id ej6mr8281273wbb.13.1323478768434; Fri, 09 Dec 2011 16:59:28 -0800 (PST) Sender: asmrookie@gmail.com Received: by 10.216.171.8 with HTTP; Fri, 9 Dec 2011 16:59:28 -0800 (PST) In-Reply-To: <4EE2AE64.9060802@m5p.com> References: <4EE1EAFE.3070408@m5p.com> <4EE2AE64.9060802@m5p.com> Date: Sat, 10 Dec 2011 01:59:28 +0100 X-Google-Sender-Auth: 7PjwZXKrs9WJTWwDBPHvkmKhWe8 Message-ID: From: Attilio Rao To: George Mitchell Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-stable@freebsd.org Subject: Re: SCHED_ULE should not be the default X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 Dec 2011 00:59:30 -0000 2011/12/10 George Mitchell : > On 12/09/11 10:17, Attilio Rao wrote: >> >> [...] >> >> More precisely I'd be interested in KTR traces. >> To be even more precise: >> With a completely stable GENERIC configuration (or otherwise please >> post your kernel config) please add the following: >> options KTR >> options KTR_ENTRIES=3D262144 >> options KTR_COMPILE=3D(KTR_SCHED) >> options KTR_MASK=3D(KTR_SCHED) >> >> While you are in the middle of the slow-down (so once it is well >> established) please do: >> # sysclt debug.ktr.cpumask=3D"" > > > wonderland# sysctl debug.ktr.cpumask=3D"" > debug.ktr.cpumask: ffffffffffffffff > sysctl: debug.ktr.cpumask: Invalid argument > > >> >> In the end go with: >> # ktrdump -ctf> =C2=A0ktr-ule-problem.out > > > It's 44MB, so it's at http://www.m5p.com/~george/ktr-ule-problem.out What svn revision did you use for it? What is the CPUs frequencies of machines generating this? Attilio --=20 Peace can only be achieved by understanding - A. Einstein