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zhengchaofeng
Observer
Observer
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Registered: ‎02-01-2018

speed problem with xdam transfer data

hi,

When I used xdma ip to transfer data, 128KB data-size on h2c almost reached full speed. But 32KB data-size on c2h, the speed decreased significantly sometimes. Just like the 3rd transmission on the picture below, when I debug axi_bram_controller.

fdsfds.jpg  

 

How can I get full speed like h2c?

 

PS    My project worked on VU9P and PCIE Gen 3.0 x16. The host CPU is intel I9, OS is ubuntu

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