vr speed issues
spork at bway.net
Fri Dec 1 12:49:14 PST 2006
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. :)
> 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
> 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.
> FreeBSD 6.2-PRERELEASE #0: Thu Nov 30 16:29:04 SGT
> vr0 at pci0:18:0: class=0x020000 card=0x80a11043 chip=0x30651106 rev=0x74
> vendor = 'VIA Technologies Inc'
> device = 'VT6102 Rhine II PCI Fast Ethernet Controller'
> class = network
> subclass = ethernet
> 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 18.104.22.168 netmask 0xffffffc0 broadcast 22.214.171.124
> inet 126.96.36.199 netmask 0xffffffff broadcast 188.8.131.52
> ether 00:0c:6e:3d:b9:0e
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
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