From owner-freebsd-current@FreeBSD.ORG Mon Sep 20 05:12:38 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ECB90106566B; Mon, 20 Sep 2010 05:12:38 +0000 (UTC) (envelope-from jhellenthal@gmail.com) Received: from mail-gx0-f182.google.com (mail-gx0-f182.google.com [209.85.161.182]) by mx1.freebsd.org (Postfix) with ESMTP id 8E5CD8FC15; Mon, 20 Sep 2010 05:12:38 +0000 (UTC) Received: by gxk8 with SMTP id 8so1519181gxk.13 for ; Sun, 19 Sep 2010 22:12:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :x-enigmail-version:content-type:content-transfer-encoding; bh=W8INcRlPM1wKSStZ7r1EBnU04HEXYqoA6X5vzO+l4m0=; b=av4ln8tZvnsLtYeZf6JaWHdW2V+h/Otjfwnhtbz3gwb6I/VdRGRWz3yVp2V/ZzdyUb +noBoquVH7V8G/EQ3IHvp5sRacgDCfYvvc08OuoTyhaAv74vZmq4WWDpcBOwt2vrCYLc btAn5etWhnFVLxPFzLI6HgAv2Yx4gG3TbCRqk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; b=Xyi7LDcw1TAs9MXjoEk35Q6fcIIIzvpxX5SC7ZFLB9LtKm60DU3k1ysgCwwvS4Dxyt UAtPLGvI0/qBeqxaeEorTkJ4UJSuZrQxNQWY7ilsuioRzVMjqk5C8K66wtRvxdaHm17l 4cflfZf+782ayWvJgfUrbKpzI9qmFOODSKsLI= Received: by 10.101.155.15 with SMTP id h15mr8704391ano.162.1284959557638; Sun, 19 Sep 2010 22:12:37 -0700 (PDT) Received: from centel.dataix.local (adsl-99-181-146-122.dsl.klmzmi.sbcglobal.net [99.181.146.122]) by mx.google.com with ESMTPS id f22sm11779733anh.24.2010.09.19.22.12.35 (version=SSLv3 cipher=RC4-MD5); Sun, 19 Sep 2010 22:12:36 -0700 (PDT) Sender: "J. Hellenthal" Message-ID: <4C96ED40.7070206@DataIX.net> Date: Mon, 20 Sep 2010 01:12:32 -0400 From: jhell User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.2.9) Gecko/20100917 Lightning/1.0b1 Thunderbird MIME-Version: 1.0 To: David Xu References: <4C961009.6080609@freebsd.org> In-Reply-To: <4C961009.6080609@freebsd.org> X-Enigmail-Version: 1.1.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org Subject: Re: sysctl -a is slow X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Sep 2010 05:12:39 -0000 On 09/19/2010 09:28, David Xu wrote: > just typed sysctl -a on keyboard, and found it is slow, sometimes > it has been stuck for a few seconds, further studied,I found it is > stucked at sysctl kern.geom: > > %/usr/bin/time sysctl -a kern.geom > kern.geom.collectstats: 1 > kern.geom.debugflags: 0 > kern.geom.label.debug: 0 > kern.geom.label.ext2fs.enable: 1 > kern.geom.label.iso9660.enable: 1 > kern.geom.label.msdosfs.enable: 1 > kern.geom.label.ntfs.enable: 1 > kern.geom.label.reiserfs.enable: 1 > kern.geom.label.ufs.enable: 1 > kern.geom.label.ufsid.enable: 1 > kern.geom.label.gptid.enable: 1 > kern.geom.label.gpt.enable: 1 > 2.01 real 0.00 user 0.00 sys > > it seems it needs more than 2 seconds to complete. > A ktrace(1) and a kdump(1) of the resulting ktrace.out file would probably help here along with uname -a. Ive seen this happen once before but do not recall what caused it. Regards & good luck, -- jhell,v