[Arm-netbook] libre 64-bit risc-v SoC

[David Niklas]

On  Mon, 8 May 2017 09:42:36 +0200
"mike.valk at gmail.com" <mike.valk at gmail.com> wrote:
> 2017-05-07 22:26 GMT+02:00 <doark at mail.com>:
> 
> > I apologize for DOS'ing the list, I can only get online about once a
> > week.
> >
> > On Fri, 28 Apr 2017 13:58:57 +0100
> > Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:  
> > >
> > > On Fri, Apr 28, 2017 at 12:47 PM, mike.valk at gmail.com
> > > <mike.valk at gmail.com> wrote:
> > >  
<snip>
> > > > I think/hope FPGA's are more efficient for specific tasks then
> > > > CPU/GPU's  
> > >
> > >  you wouldn't give a general-purpose task to an FPGA, and you
> > > wouldn't give a specialist task for which they're not suited to a
> > > CPU, GPU _or_ an FPGA: you'd give it to a custom piece of silicon.  
> >
> > I always thought that FPGA's were good for prototyping or small fast
> > tasks... But that's just how I learned about them.
> >  
> 
> Don't think of what you were thought. Think of what you can do which has
> not been thought.
> 
> The world outside the box is bigger than the on inside the box ;-)

Don't I know :)

Linux Linux
+-------+ Linux
|       | Linux
|WINDOWZ| Linux
|       | Linux
+-------+ Linux
Linux Linux

> >  
> > >  in the case where you have something that falls outside of the
> > > custom silicon (a newer CODEC for example) then yes, an FPGA would
> > > *possibly* help... if and only if you have enough bandwidth.
> > >
> > >  video is RIDICULOUSLY bandwidth-hungry.  1920x1080 @ 60fps 32bpp
> > > is... an insane data-rate.  it's 470 MEGABYTES per second.  that's
> > > what the framebuffer has to handle, so you not only have to have the
> > > HDMI (or other video) PHY capable of handling that but the CODEC
> > > hardware has to be able to *write* - simultaneously - on the exact
> > > same memory bus.
> > >  
> > <snip>
> > Your number seemed off to me so I did the math:
> > 1920*1080*60*4 ==
> > 497,664,000
> > You're off by almost 30 MiB.
> >  
> 
> 497,664,000 ~= 498 MB (Units of 1000)
> 497,664,000 ~= 475 MiB (Units of 1024)
<snip>

\me embarrassed.

Sincerely,
David