Re: [9fans] mmap

["David Leimbach" <leimy2k@gmail.com>]

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On Thu, Jul 31, 2008 at 5:32 PM, ron minnich <rminnich@gmail.com> wrote:

> here is a thought:
>
> the kernel does mmap for code/data. This is because we think of a file
> as a segment of data that somehow maps well to a segment of memory.
>
> You wouldn't execute code from a stream, now, would you?
>
> Well, this: http://www.ambric.com/
>
> has hardware channels. And you can
> call from channel
> and execute code being sent down a channel to you from another cpu.


>
> There's no real analogue to this in any OS I've used for a while ...
>
> You could write the mcilroy sieve in this very directly. You could
> even, when starting a new thread, push the code down to the next cpu.
> And that cpu is paused in a call from channel until it gets its code.
> A nice way to keep them idle until you need them.
>
> it's a very interesting architecture, to say the least. For me anyway
> the most novel thing I've seen in a while.
>

The ARM 7 and ARM 9 procs in the Nintendo DS can talk back and forth via a
FIFO at a pretty low level :-)

http://www.double.co.nz/nintendo_ds/nds_develop7.html

Dave

>
> ron
>
>

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