SD card image with Debian 8.0, Red Pitaya web server and SDK

Just about everything about Red Pitaya
fbalakirev
Posts: 43
Joined: Thu Sep 03, 2015 6:56 pm

Re: SD card image with Debian 8.0, Red Pitaya web server and SDK

Post by fbalakirev » Fri Oct 29, 2021 4:38 pm

Hi Pavel,

I noticed that you switched from HP to ACP port for ram writing in your example designs. Are there particular problems you encountered with HP port or is there some other reason to switch?

pavel
Posts: 662
Joined: Sat May 23, 2015 5:22 pm

Re: SD card image with Debian 8.0, Red Pitaya web server and SDK

Post by pavel » Sat Nov 06, 2021 12:28 pm

I switched to ACP to improve the performance of my applications using DMA. The memory buffer is now allocated using contiguous memory allocator (CMA) and the allocated memory is cacheable. The ACP bus has the cache coherency functionality necessary to write to cacheable memory.

The data transfer speed from the Red Pitaya board to a computer has improved by approximately 30% (from 60 MB/s to 80 MB/s).

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