Re: [f-cpu] F-CPU SoC

[whygee@xxxxxxxxx]

Hi Kim !

Le 2015-04-03 20:21, Kim Enkovaara a ÃcritÂ:
> > >  I would say that single core is niche market today except on IoT 
> > > side
> > >  where u/nW power consumption is needed.
> > There are still countless applications that work well with a single 
> > CPU core :-)
>
> There are, but usually at very low end. I would love to get processors
> that would be 2x faster than anything existing today, as FPGA
> compilations for example easily take 10+h and do not parallelize that
> well on some stages. And a server with hybrid memory cubes, that would
> be something.... (https://en.wikipedia.org/wiki/Hybrid_Memory_Cube).
> And HMC is not vaporware, there are products out there using it. DDR4
> is the last of its line, there is no real way to increase the bus
> speed with that parallel synchronous bus paradigm.

It's nice but what can Joe Hobbyist do right now, with which investment,
that remains fixable and hackable without hassles ?

> > Paralellism will appear when we'll have one core working.
> > Then we'll fill the FPGA with new instances :-P
> At least the locking primitives and atomic operations need to be there
> in the instruction set to make this possible. Just read rants of Linus
> from linux-kernel list ;)
Locking is the basics... However since we can't even simulate or emulate
or write code or compile code, it's not possible to judge how well
parallelism-enabling code would would work.

> > We can't reasonably access all the resources needed to build an 
> > array...
> > unless you let us play with your toys, but then, nobody else would
> > be able to reuse our work, so what's the point ?
> The point I was trying to make is the fabric, when it works well you
> can build many things out from the cores.
Yup, but in the F-CPU case, the CPU core comes before the fabric ;-)

> > >  all competing with super high performance multicore SoCs... pretty 
> > > hot ;)
> > and who's your favorite ?
> Sorry, cannot tell, and most of the really hot ones are under NDA
> still, I chose the list carefully ;)
It's not fair.

> --Kim
YG

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