From owner-freebsd-current@FreeBSD.ORG Tue Aug 30 08:20:58 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F41A716A420; Tue, 30 Aug 2005 08:20:57 +0000 (GMT) (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 6AB0243D5D; Tue, 30 Aug 2005 08:20:49 +0000 (GMT) (envelope-from doconnor@gsoft.com.au) Received: from inchoate.gsoft.com.au (ppp215-145.lns1.adl2.internode.on.net [203.122.215.145]) (authenticated bits=0) by cain.gsoft.com.au (8.13.4/8.13.4) with ESMTP id j7U8KeIj059069 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO); Tue, 30 Aug 2005 17:50:47 +0930 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: Don Lewis Date: Tue, 30 Aug 2005 17:50:21 +0930 User-Agent: KMail/1.8.1 References: <200508300250.j7U2oRhe014021@gw.catspoiler.org> In-Reply-To: <200508300250.j7U2oRhe014021@gw.catspoiler.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1698497.szEUjhWFQ0"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200508301750.31495.doconnor@gsoft.com.au> X-Spam-Score: 0.05 () FORGED_RCVD_HELO X-Scanned-By: MIMEDefang 2.51 on 203.31.81.10 Cc: freebsd-current@freebsd.org, kabaev@gmail.com Subject: Re: Odd performance problem (hitching) 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: Tue, 30 Aug 2005 08:20:58 -0000 --nextPart1698497.szEUjhWFQ0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tuesday 30 August 2005 12:20, Don Lewis wrote: > > The hitching happens even when the system is idle so I think you can MFC > > safely. > > I'd be most suspicious of the MNT_VNODE_FOREACH loop in ffs_sync(), > especially if the symptoms occur every 30 seconds. Running the CPU at > slow speed (with powerd, etc.) is likely to aggravate the problem. What > is the value of "sysctl kern.maxvnodes"? kern.maxvnodes: 35360 kern.minvnodes: 8840 vfs.numvnodes: 12723 vfs.wantfreevnodes: 8840 vfs.freevnodes: 7829 > You might try significantly decreasing MAXVNODES_MAX in > sys/kern/vfs_subr.c and rebuilding your kernel. OK.. I'll try timing when the drop outs happen :) =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 --nextPart1698497.szEUjhWFQ0 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBDFBbP5ZPcIHs/zowRAgnNAJ0V4ZUnL9xhsb5q3k3OhfavGwIfpQCffQ24 3hALZFdxToGq+JX2gjfAOfk= =mk+9 -----END PGP SIGNATURE----- --nextPart1698497.szEUjhWFQ0--