News for hackers. Stuff that matters.

A comment on Building an AlphaZero AI using Python and Keras. Parent comment

Re:Building an AlphaZero AI using Python and Keras by yazr on Friday January 26, 2018 @02:18PM (#16242059)
From the leela-zero page :

> If your CPU is not very recent (Haswell or newer, Ryzen or newer), performance will be outright bad,

Obviously TPU >> GPU >> CPU

But are there special vector instructions added in Haswell? Or is this just general preference for a multi core newish cpu ?

[ Parent | on HN ]
Re:Building an AlphaZero AI using Python and Keras by cbuq on Friday January 26, 2018 @03:11PM (#16242466)
Not sure if this is their reasoning, but Haswell introduced AVX2 instructions (https://en.wikipedia.org/wiki/Advanced_Vector_Extensions#Adv...)
[ Parent | on HN ]
Re:Building an AlphaZero AI using Python and Keras by wohlergehen on Saturday January 27, 2018 @04:18AM (#16245506)
AVX2 introduces vectorized Fused-Multiply-Add, for a 2x boost in linear algebra ops.
[ Parent | on HN ]