Date: Fri, 1 Dec 2006 15:49:18 -0500 (EST) From: Charles Sprickman <spork@bway.net> To: Jamie Clark <jamie@zeroth.org> Cc: freebsd-stable@freebsd.org Subject: Re: vr speed issues Message-ID: <Pine.OSX.4.61.0612011546530.517@white.nat.fasttrackmonkey.com> In-Reply-To: <457012AE.8050700@zeroth.org> References: <Pine.OSX.4.61.0611282212530.517@white.nat.fasttrackmonkey.com> <457012AE.8050700@zeroth.org>
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On Fri, 1 Dec 2006, Jamie Clark wrote: > Charles Sprickman wrote: >> Hi all, >> >> I spent some time trying to track down slow tcp performance on a small >> office switched 100 LAN. We just put in a number of whitebox PCs running >> FreeBSD 6.1-p2/PC-BSD 1.2 that all have onboard Via Rhine 10/100 ethernet >> controllers. Performace with scp was around 200KB/s, ftp wavered between >> 300-500KB/s. This did not appear to be a duplex mismatch - unmanaged >> switch showed them all at 100/Full, put some other hosts on the same >> ports/cabling and got near wire speed. I took the cabling out of the >> equation, the switch, no improvement. The only thing that got me decent >> performance was putting two hosts back to back with an xover cable. >> >> I eventually realized that the only hosts with any speed issues in the >> office were these boxes with the Via ethernet. Putting an equally cheap >> DLink (RealTek/rl) in one of them gave me much better performance. > [...] > > There might be something in this. I have a 2-3 yr old box with an Asus A7V8X > mainboard. This has been running 4.10-RELEASE for about 2.5 years and > yesterday I decided to bite the bullet and update to RELENG_6. I also decided > to upgrade the internal storage as well so this entailed a backup/restore > over the wire. > > Backing up the 4.10 box was within an acceptable margin of wire speed (~8MB/s > on 100M ethernet) given that a router was in the middle. That's roughly how > the box has always performed. > > After installing 6.1_RELEASE and updating to RELENG_6 I started the restore. > Maxed out at about 380kB/s. Now I tested the backup speed again and it has > also dropepd to 380k. Excellent! That's some good info. Same hardware, and you get performance like I'm seeing. There's lots of changes. :) http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/pci/if_vr.c.diff?r1=1.26.2.14&r2=1.116&f=h > This would definitely lead me to assume that something has gone awry in the > driver over the past years. Unfortunately I have not been frequently updating > this machine (my imap server) so I have no idea when the driver became > broken. > > I realize that this is not much help in tracking the problem - but it seems > to concur with the problem noted here earlier. I'm going to dig up some kind of 4.11 live cd, a 5.x live cd and some kind of simple linux live cd and have him do some quick ftp tests under each. If I see the same thing, then I'll file a PR and call this a regression. Thanks! Charles > FreeBSD 6.2-PRERELEASE #0: Thu Nov 30 16:29:04 SGT > > pciconf: > vr0@pci0:18:0: class=0x020000 card=0x80a11043 chip=0x30651106 rev=0x74 > hdr=0x00 > vendor = 'VIA Technologies Inc' > device = 'VT6102 Rhine II PCI Fast Ethernet Controller' > class = network > subclass = ethernet > > dmesg: > vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xb000-0xb0ff mem > 0xf2800000-0xf28000ff at device 18.0 on pci0 > miibus0: <MII bus> on vr0 > rlphy0: <RTL8201L 10/100 media interface> on miibus0 > rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto > vr0: Ethernet address: 00:0c:6e:3d:b9:0e > > $ ifconfig > vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet6 fe80::20c:6eff:fe3d:b90e%vr0 prefixlen 64 scopeid 0x1 > inet 203.117.131.34 netmask 0xffffffc0 broadcast 203.117.131.63 > inet 203.117.131.35 netmask 0xffffffff broadcast 203.117.131.35 > ether 00:0c:6e:3d:b9:0e > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > > -Jamie >
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