Re: [9fans] Binary format

[Enrico Weigelt <weigelt@metux.de>]

* David Leimbach <leimy2k@gmail.com> wrote:

> No I'm not saying replace all library code with filesystems.  I don't know
> why you'd want an RPC interface to an XML parser :-).

You need to implement an RPC protocol for that. And most likely you
want to get the parsed content into some convenient in-memory structure.
This probably ends up at an similar code size than the parser itself
would be, plus you have the communication overhead.

> Libraries may not always be more efficient than services.  Imagine if Intel
> released their 48 core machine today, how would your system utilize those
> cores?  Sequential programming optimizations don't (always) work in the
> parallel world, and in a lot of cases you actually want to work redundantly
> across multiple processes in order to avoid communication overheads in a
> well optimized parallel algorithm.

Wait, you cheated! You simply assumed that the application is question
can be parallized. In our XML example, there's great chance that the
application has to wait for the parser anyways, so the extra cpus/cores
would help much here. This perhaps would make sense if the file is
quite huge, the application is accessing the xml nodes quite sequentally
and does a lot of things in between. (coroutines would be fine here ;))


Unfortunately, this all is quite academical - I cant just take Plan9
for daily business uses, I just dont have the luxury of resources to
implement all the missing stuff on green land. :(
So I just can try to learn from it and take the concepts into "realworld"
step by step.


cu
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