I would like to offer my help.

I would like to offer my help.

[Matthew Kolar]

Hello, Nouveau devs!

  I would like you to know that I have a laptop with 2 Geforce GTX 285m 
cards on board in an SLI config, I know the SLI part is not relevant at 
this point, but I still would like to offer my rig for testing single 
card configs.  If you want to walk me thru what you need me to do, just 
shoot me an email.

Matthew Kolar

Re: I would like to offer my help.

[Marcin Kościelnicki]

> Hello, Nouveau devs!
>
>  I would like you to know that I have a laptop with 2 Geforce GTX
> 285m cards on board in an SLI config, I know the SLI part is not
> relevant at this point, but I still would like to offer my rig for
> testing single card configs.  If you want to walk me thru what you
> need me to do, just shoot me an email.
>
> Matthew Kolar

This sounds like a perfect configuration to RE the inter-GPU 
communication used by GPUdirect. I don't have time right now to look at 
it, but I should be able to prepare some good instructions next week. 
Basically we'd need to do a combo mmiotrace + valgrind-mmt trace of a 
CUDA application utilising GPUdirect calls in various modes.

The 3d SLI functionality, as tested by me on double-nv50 under linux, 
appears to be implemented entirely using "normal" features - the special 
inter-GPU transfer circuitry is set up, but never actually used. May 
still be worth a trace on nvc0, though.

Marcin Kościelnicki
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