Date: Mon, 20 Mar 2006 12:53:26 -0500 From: Kris Kennaway <kris@obsecurity.org> To: OxY <oxy@field.hu> Cc: freebsd-net@freebsd.org, bohuslav.plucinsky@in.nextra.sk, freebsd-questions@freebsd.org Subject: Re: Low network performance after upgrade from FreeBSD 4.8 to 6.0 Message-ID: <20060320175326.GA73262@xor.obsecurity.org> In-Reply-To: <002101c64c2b$443eaa20$0201a8c0@oxy> References: <20060320131020.GI20138@in.nextra.sk> <002101c64c2b$443eaa20$0201a8c0@oxy>
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[-- Attachment #1 --] On Mon, Mar 20, 2006 at 03:33:33PM +0100, OxY wrote: > > ----- Original Message ----- > From: "Bohuslav Plucinsky" <bohuslav.plucinsky@in.nextra.sk> > To: <freebsd-questions@freebsd.org> > Cc: <freebsd-net@freebsd.org> > Sent: Monday, March 20, 2006 2:10 PM > Subject: Low network performance after upgrade from FreeBSD 4.8 to 6.0 > > > >Hello, > > > >I use the FreeBSD box as the firewall with NAT (ipfw + natd). > >When I've upgraded the box from 4.8-20030810-STABLE to 6.0-RELEASE > >I've noticed a performance degradation. > > > >I've only one workstation behind the firewall and throughput > >of downloading an ISO image through the firewall with 6.0-RELEASE > >booted, is only 24Mbps. (When I reboot the machine with > >4.8-20030810-STABLE > >installation, the throughput is 80Mbps). The firewall_type was "open" > >during the download: > > > > > > PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND > > 229 root 1 105 0 1428K 904K RUN 0:35 40.82% natd > > > >options HZ=100 > >Can somebody advise me, if this is some configuration problem > >or the requirement of FreeBSD 6.0 kernel has been increased and HW > >of my firewall is not enough? > > HZ=100 is not a good idea.. > i set it to 1000 before and i had no idle CPU > try to set it to 2000 > echo 'kern.hz="2000"' >> /boot/loader.conf I don't think that's a sensible idea on a 400MHz CPU. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD8DBQFEHuwWWry0BWjoQKURAtwzAJ0fPFZIWonDT0AlfeniPeeus4QtyQCfWYCB 2piJ6JJpS9FDKYCCX987ZGs= =DKr8 -----END PGP SIGNATURE-----
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