Vista to XP used to work fine, but now that all three machines are Vista,
local network performance is terrible. When transferring large files from
machine to machine, the network performance graph consists of spikes from 0
to 5-60%, but there are many seconds between the spikes! Sometimes there is
no transfer for 5-20 seconds. There is effectively no CPU utilization either
during the spike or during the time of no activity. There is basically no
drive access during the dead time.

This symptom is NOT like the smooth cap that is seen due to concurrent audio
playback.

I have tried:
Uncheck QOS
Uncheck IPv6
Autotuninglevel=disable

All machines are connected through a gigabit switch with support for jumbo
frames (but jumbo frames are not turned on in the adapter configs.)

Why the long pauses and inconsistent spikes? Any input is appreciated.

Kris

Are any of your CPU's dual core, or P4 HT processors? I remember P4 HT
processor causing problems with W2K, and Gb NICs. I wonder if the same is
true with Vista, or maybe a NIC driver/BIOS update could be a solution.


"Kris" wrote in message
...
Vista to XP used to work fine, but now that all three machines are Vista,
local network performance is terrible. When transferring large files from
machine to machine, the network performance graph consists of spikes from
0
to 5-60%, but there are many seconds between the spikes! Sometimes there
is
no transfer for 5-20 seconds. There is effectively no CPU utilization
either
during the spike or during the time of no activity. There is basically no
drive access during the dead time.

This symptom is NOT like the smooth cap that is seen due to concurrent
audio
playback.

I have tried:
Uncheck QOS
Uncheck IPv6
Autotuninglevel=disable

All machines are connected through a gigabit switch with support for jumbo
frames (but jumbo frames are not turned on in the adapter configs.)

Why the long pauses and inconsistent spikes? Any input is appreciated.

Kris