How the PicoCray Was Made(raspberrypi.com)

18 pointsby _Microftvor 3 Jahren7 comments

raspberrypi.com

How the PicoCray Was Made

https://www.raspberrypi.com/news/how-i-made-the-picocray-hackspace-69/

7 comments

FounderBurrvor 3 Jahren

‘Made’

meepmorpvor 3 Jahren

I wonder what fraction of a real Cray-1’s computing power is in that thing.

primisvor 3 Jahren

The Cray-1 had 160 MFLOPS, and a single Pico has about 133 KFLOPS, so 8 of them would be just over 1 megaflop (not accounting for any overhead). So about 1/160th!

kjs3vor 3 Jahren

That's only part of the story. Cray spent a lot of time architecting an I/O system that could keep the CPU fed. So peak and sustained performance were closer than a lot of systems.

meepmorpvor 3 Jahren

Thanks!

jameskiltonvor 3 Jahren

I think you need to reverse this statement actually. How many CRAY-1 would you need to match the processing power of PicoCray?

CRAY-1: 80MHz, 160 MFLOPS (https://en.wikipedia.org/wiki/Cray-1)

PicoCray: 133MHz * 8 (https://www.raspberrypi.com/products/raspberry-pi-pico/)

mechagodzillavor 3 Jahren

Can a RasPi Pico do a double-precision floating point op every cycle?