Can you think of any reason why these speeds would exist?

[BillStuck]

Using a benchmarking tool called NetCPS which transfers 100MB of data across my home network and measures speed. The data is transfered in memory so that no HD access is required to bottleneck or scew results.

When I transfer from machine A to B i consistantly get @10Megabytes per/second but when i transfer the same data from B back to A I only get @5 or 6 Megabytes per/second?

I've even tried new network cards and the results are the same.

Why would one direction be so fast and the other 50% slower? 100bT full duplex is on..

Machine A is a Dell 700mhz celeron running Win ME with PC133 384MB ram. Machine B is a Gateway Laptop 900mhz PIII running WinXP with PC100 384MB ram.

Any thoughts?

 

[ElDonAntonio]

Maybe it's some sort of problem with WinME? curious problem indeed. Are you sure there's enough free memory in machine A to handle the 100 megs instead of resorting to the swap file?

 

[Cnuke]

I believe ElDon is on the right path with the ME issue. There are many networking issues with ME. I would not trust ME at all in any networking arena.

He has a great fact to that if your swap file is large then it will help out greatly. (On the XP box)

I would blame ME networking the most.

Good luck.

 

[BillStuck]

Originally posted by: Cnuke
I believe ElDon is on the right path with the ME issue. There are many networking issues with ME. I would not trust ME at all in any networking arena.

He has a great fact to that if your swap file is large then it will help out greatly. (On the XP box)

I would blame ME networking the most.

Good luck.

Thanks guys. Well I think I might have found the culprit. After searching tons of MS Knowledge base articles I started messing with the defaultrcvwindow setting and tcpwindowsize settings in the registry. For some reason the ME machine had a small recieve window which means only a small amount of data can be sent at a time and the rest buffered.

Anyway with a change on the XP reg. and a change in the ME reg. I'm now getting 10-11MB/s from A to B and 9MB/s from B to A. Still nto totally equal but much better then the 5 and 10 I was seeing before.