UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

Peak INT8 DSP numbers

Reply
Highlighted
Visitor
Posts: 15
Registered: ‎01-08-2018

Peak INT8 DSP numbers

Hi,

 

VU9P device specifications show 6840 DSPs and "Peak INT8 DSP (TOP/s)" = 21.3.

 

What does "INT8 DSP" operation refer to ?  Do you mean multiply ? multiply-accumulate or another operation?

 

I am familiar with Xilinx white paper on performing 2 INT8 MACC ops per DSP.

Assuming this use-case, then 6840 DSPs give 13680 ops/cycle. 400MHz clock frequency gives 5.4 TOP/s. Even with 800MHz clock, the throughput is still far from the spec.

 

Please explain how this 21.3 Top/sec is calculated.

 

Thank you

-Moshe

Visitor
Posts: 15
Registered: ‎01-08-2018

Re: Peak INT8 DSP numbers

Can anyone from Xilinx respond to this question?