[vpn-help] Possible driver latency issue in Shrewsoft on Windows?

[mctozzy at gmail.com]

Hi there,

I use the vpn client 2.2.2 on Win7 x64.  Recently I have been checking 
out my new PC for performance behavior relating to smooth audio/video 
streaming behavior, using a tool called DPC Latency checker. I noticed 
that as soon as I made a VPN connection I started getting regular 
latency spikes of between 1 and 2 milliseconds. Being a quite fast i7 
processor, this is quite a long time, and takes it to the 'borderline' 
of potentially disrupting smooth streaming.

Whilst it is possible that this is associated with latency in the NIC 
driver, it could also be in the shrewsoft client, and I wondered if any 
part of the shrewsoft stack constitutes a device driver with an 
interrupt handler in it, that is responding to interrupts and putting 
stuff into the DPC queue for handling?

Cheers,
MT