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WoW - Reduce your ping

Sent: Mán 28. Jan 2008 23:12
af Senko
Evening Fellas,

Pardon the english but I've been away from Iceland for far too long to actually write anything in Icelandic that wouldn't make me look like a total retard.

A few nights ago I bumped into a rather useful thread on http://www.mmo-champion.com - Namely, a so called lagfix, okay, long story short, this is a registry edit that works for Windows XP and Vista (granted you follow the instructions below), and will decrease your latency in World of Warcraft by quite a substantial amount of milliseconds.

Personally, I went from the usual 200-250ms down to a rock solid stable 80ms, a huuuuuge improvement, if I might say so myself.

Well, let's keep it short, please read all of the below and do not continue unless you are absolutely sure you know how to edit your registry.

The below text is quoted from mmo-champion.com - This has been tested by dozens of people that I know personally and has worked wonders for every one of us, none of us have detected any side effects.

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Lag fix - Repost
I hesitated a lot before reposting it, but I didn't have any hate mail saying "omg you broke my computer !" the first time, so I'll assume it's fairly safe. (It's not like you'll be able to send a mail to complain if your computer isn't working anyway, right ?)

A few weeks ago I posted this fix from the ElitistJerks forums and it worked well for most of the people but it's not really safe and it was supposed to be fixed in 2.3.2, however it seems that the Nagle Algorythm fix in the 2.3.2 patch isn't as effective as expected for most of the players, and if you're in desperate need of a lower ping this is still the best way to go.

<><><> Read this first <><><>
1 - It might have side effects, like slowing down your download speed or affecting your performance on other softwares. (In most case, it doesn't change anything, but you've been warned)
2 - If you're not sure about what you're doing, just don't do it. I don't want to be responsible because you crashed your computer in some way because you made a huge error when editing the registry.
2.1 - Seriously, if you don't know what you're doing, don't do it.
3 - If you don't have the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSMQ\ directory, you can download and apply this file to your registry.
4 - Windows Vista users might want to check this post too.

Source - Elitistjerks.com

1 - TcpAckFrequency - NOTE if you are running Windows Vista this setting may not have any effect - a hotfix is needed which i'm tracking down. This works fine under Windows XP

Type "regedit" in windows "run.." dialog to bring up registry menu

Then find:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\

There will be multiple NIC interfaces listed in there, find the one you use to connect to the internet, there will be several interfaces listed (they have long names like {7DBA6DCA-FFE8-4002-A28F-4D2B57AE8383}. Click each one, the right one will have lots of settings in it and you will see your machines IP address listed there somewhere. Right-click in the right hand pane and add a new DWORD value, name it TcpAckFrequency, then right click the entry and click Modify and assign a value of 1.

You can change it back to 2 (default) at a later stage if it affects your other TCP application performance. it tells windows how many TCP packets to wait before sending ACK. if the value is 1, windows will send ACK every time it receives a TCP package.

2 - TCPNoDelay
This one is pretty simple (Discussed here)

Type "regedit" in windows "run.." dialog to bring up registry menu

Then find:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSMQ\Parameters

Right-click in the right hand pane and add a new DWORD value, name it TCPNoDelay, then right click the entry and click Modify and assign a value of 1.

Click Ok and close the registry editor, then reboot your PC.


Once you're done with the technical stuff (it probably won't take more than 1 minute if you're not too bad at it), you can finally get your reward.

Mynd

Sent: Þri 29. Jan 2008 15:40
af gunnargolf
Já, einmitt. Þetta er frekar grunsamlegt. :lol:

Sent: Þri 29. Jan 2008 15:52
af einzi
tja í rauninni ekki, eina sem þetta gerir er að breyta hvernig TCP vinnur í tölvunni þinni. Stundum kemur þetta að gagni .. stundum ekki.

TcpAckFrequency og TcpNoDelay segir til um hve marka TCP pakka á að taka við áður en ACK ( sem er í raun "ok ég fékk pakkann heilan" fyrir netið ) er sent til baka. Ef að beðið er eftir ACK til að sjá hvort þurfi að senda pakkan aftur getur það valdið laggi.

Sent: Fös 01. Feb 2008 08:22
af Senko
For those having trouble believing that this will work, here are a few further notes that I've gathered through research, as some of you might know, WoW uses a method of communicating between you and their server, that goes by the name of Nagle's Algorythm,

"What is Nagle's Algorythm?"

It is used to send several packets of information at once - increasing latency but decreasing bandwidth. Without it the packets are sent individually


Nagle's algorythm is a means of improving the efficiency of TCP/IP networks by reducing the number of packets that need to be sent over the network. It is named after John Nagle, who devised it whilst employed at Ford Aerospace.

It's a method of handling information packets across the Internet. Applying it makes for slower, more efficient packet transmission, but for online games that require constant communication, it can cause lag. Bad, naughty, slideshow of death lag. Ok, not that bad, but removing it will increase responsiveness of the game. And that doesn't suck.


So, having puzzled togeather the above provided information, you might just understand a bit how this whole thing works, and why it will decrease your ping.

Sent: Fös 01. Feb 2008 10:57
af einzi
Og ég sem hélt þetta væri Naga's Algorythm .. silly me :roll:

Sent: Sun 03. Feb 2008 03:22
af daremo
WoW notar reyndar ekki nagle's algorithm lengur. Það var fjarlægt í nýlegum plástri.

Sent: Sun 03. Feb 2008 07:18
af Senko
Wrong, well, altho officially they removed it, they are still running on similar technology, example,

Did you notice any ping improvements once the latest patch was released? - I didn't, and I only applied this TCP fix after the proclaimed Nagle's Algorythm removal patch...

Well either way, cutt my ping by more than half :).

Sent: Mið 26. Mar 2008 11:26
af siggik
Þetta virkar, allavega downloadaði ég forriti sem hreinsar registry og pingið fór úr 2-300 í 40-70