On Fri, 1 Dec 2006, Mark Kirkwood wrote:
Mark Kirkwood wrote:
Charles Sprickman wrote:
I also did a little more digging and noticed that once I start pinging
from one of these hosts using large packet sizes, I get about 50-60%
packet loss (ie: ping -s 1500 other.vr0.host). If I ping something with a
decent card, I get about 30-50% packet loss. There's no packet loss with
the default packet size.
Anyone else with some vr cards feel like checking this out?
I've got a VIA Rhine III card that I can dig out and put in if the data
would be of any use/interest etc - FWIW I seem to recall being able to get
reasonably close to wire speed when I was using it.
I plugged in the card today, and seem to get pretty reasonable performance
(8-10MB/s for scp - see attached). The two boxes are plugged into a Linksys
router via store made cat5 or cat6 cables. The second box has an Intel PRO
100 (fxp) adapter.
Interesting. I've had the vr hosts going through three different
switches, patch cables, the in-house cabling, and the issue remains the
same. I'd love to just replace a cable and be done with it, but that
doesn't seem to be the issue. I can also eliminate it by just switching
out cards... so I don't really suspect I've got a whole load of bad
cables.
Removing the vr card and going back to fxp everywhere seems to provide better
performance (e.g. get 9MB/s in the last test), but the vr performance is
acceptable (maybe your router clashes with your card?).
Mine borders on unusable. The packet loss really slows down and stalls
TCP connections.
I noticed you have a newer revision of the Via card:
# pciconf -lv
[EMAIL PROTECTED]:9:0: class=0x020000 card=0x14031186 chip=0x31061106 rev=0x86
hdr=0x00
vendor = 'VIA Technologies Inc'
device = 'VT6105M/LOM Rhine III PCI Fast Ethernet Controller'
class = network
subclass = ethernet
This is what I'm dealing with:
[EMAIL PROTECTED]:17:7: class=0x060000 card=0x287e1106 chip=0x287e1106
rev=0x00 hdr=0x00
vendor = 'VIA Technologies Inc'
class = bridge
subclass = HOST-PCI
[EMAIL PROTECTED]:18:0: class=0x020000 card=0x80a71043 chip=0x30651106 rev=0x7c
hdr=0x00 vendor = 'VIA Technologies Inc'
device = 'VT6102 Rhine II PCI Fast Ethernet Controller'
class = network
subclass = ethernet
Maybe I'll just round up as much info as I can at my next visit, grab some
tcpdumps of the loss from both ends and do a send-pr and hope for the
best. I can get along with replacing the cards, but they seem to be
really common these days - basically any cheap system with a Via chipset
and onboard ethernet will be using some variation on this controller.
Charles
Cheers
Mark
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