Re: Release 0.8.9 of GPL PV drivers for Windows

[Florian Manschwetus <florianmanschwetus@gmx.de>]

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James Harper schrieb:
> Here's the latest version. Took me ages to get to the bottom of what
> turned out to be a pretty simple problem - windows can give us more
> pages in a packet than Linux can handle but Linux (netback) doesn't
> complain about it, it just creates corrupt packets :(
> 
> Download from http://www.meadowcourt.org/WindowsXenPV-0.8.9.zip
Sounds, nice, when i get the time these days, I'll sign this stuff to 
make it acceptable for my 64Bit 2008. Then lets have a look.

Florian
> 
> I'll probably do another release very shortly, mainly to reduce memory
> consumption on the tx side so that more interfaces can run at once.
> 
>> >From the testing I've done, on a UP windows DomU, with iperf options '-l
> 1M -w 1M', with the iperf server running in Dom0, I get TX throughput of
> about 1.5Gbits/second and RX throughput of about 0.5Gbits/second. When I
> tried it under SMP it worked, but the performance was horrible. Probably
> best if you don't run it under SMP for the moment :)
> 
> I did have a test performance of 2.5Gbits/second, but now that I have to
> copy the windows buffers into my own buffers to reduce page usage, I
> seem to only be able to get about 1.5Gbits/second out of it... This kind
> of makes sense given that DomU to Dom0 network performance is going to
> be CPU and Memory bandwidth bound.
> 
> James
> 
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> 


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