[Ilugc] why embedded Linux not having swap partition.
- From: balajig.foss@xxxxxxxxx (Balaji Foss)
- Date: Wed, 28 Mar 2012 16:28:33 +0530
I am sorry, but, what does it means by "access times are non
deterministic"?
Pardon me, I don't have any knowledge on Embedded system architecture. :)
The reason why it could be non deterministic is because there could be
interrupts trig erred by virtual memory systems during I/O
which could cause jitters in accessing and hence its not rest assured that
you get the same look up time for the access.
Cheers,
- Balaji
On Wed, Mar 28, 2012 at 3:45 PM, Zico <mailzico at gmail.com> wrote:
On Wed, Mar 28, 2012 at 3:35 PM, Balaji Foss <balajig.foss at gmail.com>
wrote:
Swap memory is concerned with paging.
http://en.wikipedia.org/wiki/Paging ;<
http://en.wikipedia.org/wiki/Paging>
Paging is part of Virtual Memory. Page tables maintain the mapping
between
the Virtual Memory and the Physical Memory.
You have virtual memory in embedded system.
Embedded systems generally dont have Virtual Memory because the access
times are non deterministic.
Interesting. :)
I am sorry, but, what does it means by "access times are non
deterministic"?
Pardon me, I don't have any knowledge on Embedded system architecture. :)
--
Best,
Zico
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