From owner-freebsd-stable@FreeBSD.ORG Thu Aug 20 07:25:17 2009 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 26E00106568E for ; Thu, 20 Aug 2009 07:25:17 +0000 (UTC) (envelope-from doconnor@gsoft.com.au) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.freebsd.org (Postfix) with ESMTP id 8F8AB8FC69 for ; Thu, 20 Aug 2009 07:25:16 +0000 (UTC) Received: from inchoate.gsoft.com.au (inchoate.gsoft.com.au [203.31.81.30]) (authenticated bits=0) by cain.gsoft.com.au (8.13.8/8.13.8) with ESMTP id n7K7PD68040548 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Thu, 20 Aug 2009 16:55:13 +0930 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: Bob Bishop Date: Thu, 20 Aug 2009 16:55:00 +0930 User-Agent: KMail/1.9.10 References: <200908201204.24914.doconnor@gsoft.com.au> <1C09D3DE-5DA2-4AC6-B546-DA8E6715E1F4@gid.co.uk> In-Reply-To: <1C09D3DE-5DA2-4AC6-B546-DA8E6715E1F4@gid.co.uk> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1632803.zyBB5vPTYh"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200908201655.08711.doconnor@gsoft.com.au> X-Spam-Score: -3.599 () ALL_TRUSTED,AWL,BAYES_00 X-Scanned-By: MIMEDefang 2.63 on 203.31.81.10 Cc: freebsd-stable@freebsd.org Subject: Re: Blocked process 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: Thu, 20 Aug 2009 07:25:17 -0000 --nextPart1632803.zyBB5vPTYh Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thu, 20 Aug 2009, Bob Bishop wrote: > Hi, > > On 20 Aug 2009, at 03:34, Daniel O'Connor wrote: > > [...] > > The problem appears to now be that the userland process that reads > > data > > out of the kernel is being stalled for over 4 seconds. This process > > reads from the kernel and does some minor processing and then > > writes it > > out to a child process to do some more work on it. > > > > [...] > > Given that renice'ing has an effect it seems to be a scheduler > > problem, [etc] > > Which scheduler are you using? Have you tried the other one? This is running in 6.2 ish using 4BSD, I was under the impression ULE=20 wasn't very stable in 6.2. I could probably try it though... =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart1632803.zyBB5vPTYh Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iD8DBQBKjPpU5ZPcIHs/zowRAjHIAKCrKB2g3skAaST4GWD/yT836VuhZgCdHqKR o+OaEFE4HRwhs/8H5LtmYVw= =AfFw -----END PGP SIGNATURE----- --nextPart1632803.zyBB5vPTYh--