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Observer
Observer
929 Views
Registered: ‎06-15-2018

PCIe DMA to DDR4 system

We are trying to design a system that uses the PCIe DMA bridge to write to DDR4 memory. After generating the example design from the PCIe DMA IP, we were able to successfully test the interface at speeds of ~7 GT/s on an Ubuntu machine. The example design is writing to BRAM after further inspection. When attempting to use the DMA IP with DDR4 memory on our own design, we modeled our design after:

https://www.origin.xilinx.com/video/technology/getting-the-best-performance-with-dma-for-pci-express.html

 

The highest speed we are able to get in the Xilinx driver performance test is 200 MT/s. Is there a copy of the design from the previous mentioned video that we can access?

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Adventurer
Adventurer
921 Views
Registered: ‎06-24-2011

This is more of a question rather than a direct reply.

 

When you successfully tested your PCIe-DMA-BRAM IP design, were you using an evaluation board?  If so, what board was it?

Thanks.

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