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Intel NIC driver optimization?

V

Valnar

Supreme [H]ardness
Joined
Apr 3, 2001
Messages
4,552
This is one of those arts I learned years ago and unfortunately already forgot!

I have two PC's in my house. One server, one workstation. Both running Windows with Intel gigabit NIC's (82574L and 82579LM respectively). Switch is a Cisco 3560G. Being on a LAN, everything is < 1ms.

I get different speeds when doing a Windows copy between the boxes.

From the POV of my workstation:
Workstation sending file to server: 189Mb
Workstation pulling file from server: 726Mb

From the POV of Server:
Server sending file to workstation: 396Mb
Server pulling file from workstation: 268Mb

Why is it so lopsided? I'm sure there are settings one can optimize in the Intel NIC drivers to bump up the speed, but I am open to other suggestions too.
 
Set Interrupt Moderation to High to gain a little more throughput. It should be in 'Advanced' or 'Performance Options' depending on your Intel NIC model.
 
Why dont you run iperf between the 2 hosts to get the true network throughput. I think you'll find the NIC isnt the problem.
 
Is there an iperf for Windows?

To my original post - my last PC had Marvell NIC chipsets. No problems.
 
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