Interupt Moderation on Gb NICs

Nosferatu · Post by **Nosferatu** » Fri Oct 19, 2007 12:28 pm

Now this is going to sound like Im whining. Sorry about that, but I really think there is something to this.

If you have a relative new computer with a NIC card that has Gb ethernet, it going to have an option of something like \"Interupt Moderation\". If you have that option and your going to play online.....

PUUULLLLLLEEEEEAAAAASE DISABLE IT!

Everyone I know who plays other games online says it causes a noticeable lag and I have noticed it myself.

Ya,ya \"Just learn to aim Nos right?\" whatever.

But dismissing that attitude, I do think there is something to this.

Krom · Post by **Krom** » Fri Oct 19, 2007 1:03 pm

Learn to aim Nos.

None of the Gigabit LAN adapters in my computers have that option, its probably something specific to your chipset/driver.

Nosferatu · Post by **Nosferatu** » Fri Oct 19, 2007 1:35 pm

Krom wrote:Learn to aim Nos.

LOL.

But if anyone wants a little more info, here is a good link:

http://www.theboxheads.net/modules.php? ... w=previous

Mine is a Yukon BTW.

MD-2389 · Post by **MD-2389** » Sat Oct 20, 2007 9:08 pm

heh

Have you read the rest of that thread Nos?

If that wasn't an e-penii war, I don't know what is.

Nosferatu · Post by **Nosferatu** » Sat Oct 20, 2007 9:45 pm

Actually I did and your right.

There isn't all that much on the net about it but there is a little here and there.

I do think there is something to it, knowing what \"Interrupt moderation\" is there for, and how it works.

Its great if all you are doing is downloading large files, but causes all sorts of problems if you are uploading files or playing games (which need a stable upload with with low latency).

In places that I have worked before, I have actually seen some software fail because it wasn't seeing return packets where it was expecting them. I turned off \"Interrupt moderation\" and all of a sudden it magically worked. This was time sensitive software that was dealing with online trading.

JMEaT · Post by **JMEaT** » Mon Oct 22, 2007 7:57 am

Found it on my HP laptop and disabled:

Thanks for the tip!

fliptw · Post by **fliptw** » Mon Oct 22, 2007 9:44 am

where you getting bad latency before you did that jmeat?

JMEaT · Post by **JMEaT** » Mon Oct 22, 2007 11:44 am

I have never gamed on the NIC, just wireless. I wish the Wireless tab had a setting like that because it lags horribly.

Grendel · Post by **Grendel** » Mon Oct 22, 2007 7:09 pm

Uh, I got IntMod on at a rate of 5k IRQs/s. If I turn it off my lag would decrease by 1/5000s in the best case...

Nosferatu · Post by **Nosferatu** » Mon Oct 22, 2007 9:41 pm

Grendel wrote:Uh, I got IntMod on at a rate of 5k IRQs/s. If I turn it off my lag would decrease by 1/5000s in the best case...

Actually what I've been told is that the firmware that runs it, is not exactly reliable yet and a bunch of packets still can occur between interrupts.

I know with it on, I sometimes see really weird things happen, like I just grabbed a powerup from halfway across a room. That doesn't happen when its off.

(Ya Ya, good if its a powerup I want, but if I was just charging a fusion and I accidentally grab an MD. DOH! >_< )

Grendel · Post by **Grendel** » Mon Oct 22, 2007 11:48 pm

Forgot to mention that it's a Marvell GB NIC. I do run it at 1GB too and don't see strange effects if it's on -- driver seems pretty mature.

Warlock · Post by **Warlock** » Fri Oct 26, 2007 6:44 pm

I did some testing on my fathers comp cause it had that option and I see no diff at all and every computer I built scence 2002 iv had gigabit nics.

Now I have seen issues if you are not useing a gigabit switch but have gigabit nics causeing lag but on a \"good\" gigabit switch the problem is gone

Interupt Moderation on Gb NICs

Interupt Moderation on Gb NICs

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