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:
[EMAIL PROTECTED]: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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