Maximum throughput of Arty Z20

[Joseph Fourier]

I try to estimate how much bytes I can pump through the SoC on Arty Z7-20 at max speed.
Based on ug585 and Arty Z7 Reference, I find following max throughputs:

1) Ethernet <---> Zynq PS: 125 MB/sec
2) USB <---> Zynq PS: 60 MB/sec
3) SD <---> Zynq PS: 25 MB/sec
4) DDR <---> Zynq PS: 2100 MB/sec (16 bit data bus; 1050 Mbit per lane)

Inside SoC:

1) Zynq on chip memory <---> Zynq PL: 1200 MB/sec READ + 1200 MB/sec WRITE (AXI_HP3)
2) Zynq PS  <---> Zynq PL: 1200 MB/sec READ + 1200 MB/sec WRITE (AXI_GP0 and AXI_GP1 combined)
3) Zynq DDR controller <---> Zynq PL: 1200 MB/sec READ + 1200 MB/sec WRITE (AXI_HP0)

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1) Is my analysis correct?

2) If yes, it looks like the fastest channel to external world is Ethernet, if input data is several Gigabytes?

3) I was thinking to attach an external USB SSD to use as input data to PS+PL, but actual 60 MB/sec bandwidth will be probably much lower?

[jpeyron]

Hi @Joseph Fourier,

We have not tested the maximums data rates for the ethernet, usb, sd or ddr.  I believe that Ethernet is going to be the fastest channel to the external world if your input data is Gigabytes. I am not sure, since we did not test those metrics, if you will be able to get 60 MB/S on the USB. This is also with you using something like petalinux correct?

thank you,

Jon