Re: [TCLCORE] Coroutines in HEAD

[miguel s. <mig...@gm...>]

Lars Hellström wrote:
> Alexandre Ferrieux skrev:
>>> Also, from time to time people hint at the fact that passing a
>>> continuation or coroutine across the thread/interp boundary would be
>>> Overly Cool, but again I'd like a few examples of what real problems
>>> this would solve.
> 
> I have no idea why that should be cool -- Miguel had however mentioned 
> it as something the NRE [coroutine]s cannot do, so I thought it worth 
> pointing out that you get it for free with [suspend]/[resume]. Maybe he 
> can elaborate on the usefulness of this however.

Scenario: webserver on a multicore cpu, one-coroutine-per-session. Ie, maintain 
session state in the coro's local vars (as opposed to hitting a database or 
something equivalent).

The way it is today, you may run as many threads as you have cores (or a bit 
more), and allocate user sessions to the threads on creation in order to balance 
the load. But once created, a session has to be resumed in the same thread each 
time a new request comes in.

If the coros could be resumed in any thread, you could balance your load 
dynamically - each time a request comes in.