[Stackless] stacklessocket with threads, and stacklessfile

Christian Tismer tismer at stackless.com
Thu Aug 9 02:08:51 CEST 2007


Tim,

On Aug 9, 2007, at 1:26 AM, Tim Kientzle wrote:

> Chris,
>
> The problem with today's stacklesssocket is the I/O
> pump tasklet that repeatedly calls select().
> Remember that select() is itself a blocking system call,
> so the I/O pump invokes it with a short timeout
> so that other tasklets get serviced.

As I remember this is possible with a timeout of zero,
therefore just serving things that are already available.
But as said, my knowledge is rusty, I just need to get up
onto my Stackless on Rails :-)

> The application that Alec is working on has a mix of
> computation tasklets and I/O tasklets and the current
> stacklesssocket design causes the computation tasklets
> to get stalled everytime select() gets called by the
> I/O pump.
>
> Our proposal: run the select() loop in a separate
> thread so that the select() doesn't block all other
> tasklets.
>
> Does this make sense?

I don't know, yet. But I sware - I will know!

cheers - chris

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