История изменений

GeForce products feature a single DMA Engine* which is able to transfer data in one direction at a time. If data is being uploaded to the GPU, any results computed by the GPU cannot be returned until the upload is complete. Likewise, results being returned from the GPU will block any new data which needs to be uploaded to the GPU. The Tesla GPU products feature dual DMA Engines to alleviate this bottleneck. Data may be transferred into the GPU and out of the GPU simultaneously.

GeForce GPUs do not support GPU-Direct RDMA. Although the MPI calls will still return successfully, the transfers will be performed through the standard memory-copy paths. The only form of GPU-Direct which is supported on the GeForce cards is GPU Direct Peer-to-Peer (P2P). This allows for fast transfers within a single computer, but does nothing for applications which run across multiple servers/compute nodes. Tesla GPUs have full support for GPU Direct RDMA and the various other GPU Direct capabilities. They are the primary target for these capabilities and thus have the most testing and use in the field.

GeForce products feature a single DMA Engine* which is able to transfer data in one direction at a time. If data is being uploaded to the GPU, any results computed by the GPU cannot be returned until the upload is complete. Likewise, results being returned from the GPU will block any new data which needs to be uploaded to the GPU. The Tesla GPU products feature dual DMA Engines to alleviate this bottleneck. Data may be transferred into the GPU and out of the GPU simultaneously.