Date: Tue, 30 Aug 2005 17:50:21 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Don Lewis <truckman@freebsd.org> Cc: freebsd-current@freebsd.org, kabaev@gmail.com Subject: Re: Odd performance problem (hitching) Message-ID: <200508301750.31495.doconnor@gsoft.com.au> In-Reply-To: <200508300250.j7U2oRhe014021@gw.catspoiler.org> References: <200508300250.j7U2oRhe014021@gw.catspoiler.org>
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--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--
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