[Stackless] irc threads
ldickson at cuttedge.com
Tue Jul 14 17:34:21 CEST 2009
There seems to be a false assumption here: select does not "poll the
sockets" (or anything else) and it is not inefficient. In fact, it blocks
until one of the events in question takes place, then reawakens a single
process (e.g. main tasklet). This is as efficient as you can get, and
"native facilities" are almost certainly just doing the same thing in a
Cutting Edge Networked Storage
On 7/9/09, Kristján Valur Jónsson <kristjan at ccpgames.com> wrote:
> StacklessIO is written in C++. It uses native facilities to notify an
> internal event queue when an IO request has completed, instead of requiring
> the "main tasklet" to regularly poll the sockets using select() which is
> inefficient. This aims to minimize latency and reduce overhead. It can
> also use the async. notification facility of the python C api to wake up
> sleeping tasklets without requiring the main tasklet to poll the event
> It is also more 'complete' in its emulation of the native socket module, I
> But performance tests by Richard on his module have still shown it to be
> very capable, and to scale better than threaded solutions like your irc
> server, so it may well be quite adequate for the task.
> > -----Original Message-----
> > From: Henning Diedrich [mailto:hd at authentic-internet.de]
> > Sent: 9. júlí 2009 14:02
> > To: Kristján Valur Jónsson; stackless at stackless.com
> > Subject: Re: [Stackless] irc threads
> > Kristján Valur Jónsson wrote:
> > > Yes, stacklessIO is designed to do that for you, to provide a
> > transparently tasklet-blocking replacement module for socket and
> > others.
> > > However, I hven't still managed to release it (although I do intend
> > to as soon as I can) and it is at them moment Windows only, and likely
> > to remain so for a bit.
> > >
> > > Meanwhile, there is Richard Tew's async socket implementation.
> > >
> > > K
> > >
> > Thanks for the clarification. What is the difference between
> > stacklessIO
> > and Richard's implementation? This question is probably naive but maybe
> > some pointers are possible?
> > Thanks,
> > Henning
> Stackless mailing list
> Stackless at stackless.com
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