Nouveau - Oct 2024 - [PATCH v1 0/4] GPU Direct RDMA (P2P DMA) for Device Private Pages

On Tue, Oct 15, 2024 at 06:23:44PM +0300, Yonatan Maman
wrote:
> From: Yonatan Maman <Ymaman at Nvidia.com>
> 
> This patch series aims to enable Peer-to-Peer (P2P) DMA access in
> GPU-centric applications that utilize RDMA and private device pages. This
> enhancement is crucial for minimizing data transfer overhead by allowing
> the GPU to directly expose device private page data to devices such as
> NICs, eliminating the need to traverse system RAM, which is the native
> method for exposing device private page data.
Please tone down your marketing language and explain your factual
changes.  If you make performance claims back them by numbers.

On 16/10/2024 7:23, Christoph Hellwig wrote:
> On Tue, Oct 15, 2024 at 06:23:44PM +0300, Yonatan Maman wrote:
>> From: Yonatan Maman <Ymaman at Nvidia.com>
>>
>> This patch series aims to enable Peer-to-Peer (P2P) DMA access in
>> GPU-centric applications that utilize RDMA and private device pages.
This
>> enhancement is crucial for minimizing data transfer overhead by
allowing
>> the GPU to directly expose device private page data to devices such as
>> NICs, eliminating the need to traverse system RAM, which is the native
>> method for exposing device private page data.
> 
> Please tone down your marketing language and explain your factual
> changes.  If you make performance claims back them by numbers.
> 
Got it, thanks! I'll fix that. Regarding performance, we?re achieving 
over 10x higher bandwidth and 10x lower latency using perftest-rdma, 
especially (with a high rate of GPU memory access).