On Sun, Mar 04, 2007 at 11:39:18AM -0800, Alan D. wrote:
> Months later I fineally realized that I was actually having lag spikes
> in other games, the only difference was those games didn't completely
> freeze me in place when a lag spike would occur. Using Wireshark I
> discovered that what is happening is at some point a packet is lost
> and then resent as it should be, but following this there is what I
> can only describe as a "TCP DUP ACK" storm, where the same ACK is sent
> 10-200 times over a period of several seconds that coincides precisely
> with the lag events experienced in games.
What protocol(s) is the game using? UDP? Does Wireshark tell you a
packet is dropped right before the dup ack storm? Are the dup acks
going in both directions? After this lag event, everything returns to
normal?
> The following is a list of things I have tried so far to determine the
> problem:
>
> 1) Replaced ethernet cable
> 2) Installed a Realtek 8139 NIC & disabled onboard NForce4 NIC
> 3) Replaced PIX 501 with a Windows 2000 RRAS server
> 4) Connected my PC directly to the modem (other systems in my house
> work fine)
> 5) Complete reformat and reinstallation of latest drivers for all
> hardware
> 6) Replaced motherboard with an MSI Neo4
Sounds like the only things left unchanged are the OS and the
(cable/DSL) line and/or modem/router. I would try to see if you get
these lag spikes while doing other things that transfer a lot of data
such as a file upload and a file download.
Steve
