57K views · Nov 22, 2016 · 46:36 · 2 HN recommenders · 4 mentions · discussed 2016–2018
Sophie Wilson, designer of the ARM instruction set, discusses the future of microprocessors, including the economics of scaling below 28nm and why much of a chip must stay powered off.
Why Hacker News points people here: HN commenters cite it for the claim that process scaling beyond 28nm is uneconomic and for dark silicon.
“Highly recommend watching this video”HN comment, 2016
“Highly recommend watching this video”
Explains why most of a chip is powered off.
Moore's law has been dead for a while now. Most of the chip in your phone is powered off because otherwise it would burn up. Highly recommend watching this video: this video
“Sophie Wilson talks about it much better then i could.”
Explains cost of going below 14nm.
It is hard (read expensive) to go under 14nm. Sophie Wilson talks about it much better then i could. this video
“Sophie Wilson said [0] its 28nm for ever.”
Source for claim that scaling below 28nm is uneconomic.
> when Moore's Law hits physical limits? It already did. Sophie Wilson said [0] its 28nm for ever. Scaling further makes no economic sense (unless you really need the space, e.g. in Smartphones). [0] this video
“Sophie Wilson said something similar in her talk about the future of microprocessors”
Wilson makes similar point about scalar imperative languages.
I agree that this article hits pretty hard against a lot of assumptions about how our machines are working. I also feel like the author is trying to say something about how imperative scalar (meaning 'operates on one datum at a time') languages are causing more trouble than they're worth. Sophie Wilson said something similar in her talk about the future of microprocessors [1]. This implies that declarative and functional semantics would be more amenable to parallelization, as the author mentions in the article, as well as allowing the compiler more freedom to deduce a suitable 'reordering' of operations that would better fit the memory access heuristics the machine is using. [1] this video
