Re: IBM demos cognitive computer chips

From	BGB <cr88192@hotmail.com>
Newsgroups	comp.arch
Subject	Re: IBM demos cognitive computer chips
Date	2011-08-21 13:19 -0700
Organization	albasani.net
Message-ID	<j2rphi$cjs$1@news.albasani.net> (permalink)
References	(2 earlier) <oex3q.19896$iK1.12792@newsfe05.iad> <j2mbn8$706$1@news.albasani.net> <4dd73d66-2fcd-4612-be8f-eeb7709b456c@k15g2000yqd.googlegroups.com> <j2rkm6$1s4$1@news.albasani.net> <z0d4q.15473$2k4.10469@newsfe19.iad>

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On 8/21/2011 12:29 PM, Robert Myers wrote:
> On 8/21/2011 2:56 PM, BGB wrote:
>> On 8/21/2011 5:16 AM, Quadibloc wrote:
>>> On Aug 19, 12:52 pm, BGB<cr88...@hotmail.com> wrote:
>>>
>>>> granted, I also dislike how much some people are prone to
>>>> trivialize/demean the Von Neumann architecture,
>>>
>>> This is simply a reaction to the "real world", which uses the von
>>> Neumann architecture exclusively because it knows nothing better - and
>>> is currently being dragged kicking and screaming to the use of
>>> multiple cores because the chipmakers can't make one core faster any
>>> more.
>>>
>>
>> AMD Fusion is cool, although too bad the GPU's don't run something more
>> x86-like, as this could allow interesting possibilities. it may take
>> several generations though before the technology gets "more cool".
>>
>
> GPU's don't ameliorate the inherent limitations of the Von Neumann
> architecture. To the contrary, they make the usual problems associated
> with moving data around even more painfully obvious. Except in those
> cases where the entire working set can be fit into super-fast graphics
> memory, GPU's will be memory-bound (latency, bandwidth, or both), just
> like most realistic problems on any other Von Neumann architecture.
>

I think the AMD Fusion idea is that much of the time, the working set 
can be largely held in cache (nevermind if it is measured in kB).

another possibly nifty idea of memristors in a conventional 
architecture: much larger CPU cache.

say, if in the future, one can have 64MB, 256MB, or 1GB of CPU cache, 
then the lower bandwidth of external memory will be less of an issue.

it is much like having lots of RAM mostly covers for the relatively slow 
speed of the disk drives...

yeah... powering through life at 5400 RPM speeds...

misc:

went off and read about split stacks (AKA: segmented stacks), which are 
possibly a more practical idea (cheaper/...) than would be expecting 
native compilers to generally migrate over to CPS and/or allocate 
individual call-frames.

a slight uncertainty though would be if I were to try using similar on 
Windows (in my own VM) if there is a risk that this could leave the OS 
hopelessly confused (my current system uses a mix of the native ABI and 
heap-allocated call-frames, generally with the native stacks shared as a 
temporary-use scratchpad between any number of VM-managed "green threads").

but, a partial advantage is that, it can be supported by the ABI but 
need not be used by the underlying OS (the stack-check operation being 
essentially no-op).

a slight downside though is that split-stacks still don't (inherently) 
allow any good way to implement continuations. actually, a common way of 
implementing continuations, stack-copying, would actually be made 
somewhat worse with this strategy. would likely still require heap-based 
storage for lexical variable capture (needed by closures).

or such...

Thread

IBM demos cognitive computer chips Brett Davis <ggtgp@yahoo.com> - 2011-08-18 18:02 -0500
  Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-18 20:37 -0400
    Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-19 13:40 -0400
      Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-19 11:52 -0700
        Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-19 15:50 -0400
          Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-20 00:15 -0700
            Re: IBM demos cognitive computer chips Stephen Fuld <SFuld@alumni.cmu.edu.invalid> - 2011-08-20 09:22 -0700
              Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-20 14:10 -0400
        Re: IBM demos cognitive computer chips Quadibloc <jsavard@ecn.ab.ca> - 2011-08-21 05:16 -0700
          Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-21 11:56 -0700
            Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-21 15:29 -0400
              Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-21 13:19 -0700
            Re: IBM demos cognitive computer chips "Andy \"Krazy\" Glew" <andy@SPAM.comp-arch.net> - 2011-08-22 09:41 -0400
              Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-22 12:22 -0700
                Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-22 13:01 -0700
              Re: IBM demos cognitive computer chips "Andy \"Krazy\" Glew" <andy@SPAM.comp-arch.net> - 2011-08-23 10:11 -0400
              Re: IBM demos cognitive computer chips Eric  Northup <digitaleric@gmail.com> - 2011-08-23 09:36 -0700
                Re: IBM demos cognitive computer chips "Andy \"Krazy\" Glew" <andy@SPAM.comp-arch.net> - 2011-08-24 22:15 -0400
                Re: IBM demos cognitive computer chips "Andy \"Krazy\" Glew" <andy@SPAM.comp-arch.net> - 2011-08-25 09:07 -0400
      Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-20 01:41 -0400
      Re: IBM demos cognitive computer chips Stephen Fuld <SFuld@alumni.cmu.edu.invalid> - 2011-08-20 08:55 -0700
        Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-20 16:10 -0400
          Re: IBM demos cognitive computer chips Stephen Fuld <SFuld@alumni.cmu.edu.invalid> - 2011-08-21 21:11 -0700
            Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-22 12:04 -0400
              Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-22 12:22 -0400
            Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-22 14:24 -0400
              Re: IBM demos cognitive computer chips Quadibloc <jsavard@ecn.ab.ca> - 2011-08-22 19:32 -0700
                Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-22 23:21 -0700
                Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-23 09:49 -0700
                Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-23 09:46 -0700
                Re: IBM demos cognitive computer chips BGB <cr88192@hotmail.com> - 2011-08-23 15:05 -0700
                Re: IBM demos cognitive computer chips Piotr Wyderski <peter.pan@neverland.mil> - 2011-08-26 16:04 +0200
                Re: IBM demos cognitive computer chips Quadibloc <jsavard@ecn.ab.ca> - 2011-08-26 09:58 -0700
                Re: IBM demos cognitive computer chips ChrisQ <meru@devnull.com> - 2011-08-29 14:56 +0100
                Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-29 11:06 -0400
                Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-29 16:10 -0400
                Re: IBM demos cognitive computer chips EricP <ThatWouldBeTelling@thevillage.com> - 2011-08-29 17:48 -0400
                Re: IBM demos cognitive computer chips Robert Myers <rbmyersusa@gmail.com> - 2011-08-29 19:24 -0400
    Re: IBM demos cognitive computer chips ggtgp@yahoo.com - 2012-03-30 21:54 -0700

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