Those delayed msgs are used to wake up the actor. 2013/2/5 Apostolis Xekoukoulotakis <[email protected]>
> Let me say one of my use cases that, i think cant be handled by timers. > This is WIP. > > I have in each thread multiple actors. Each such actor might want to ask > for a service (like a database). > It sends a message and then work passes to other actors. Since there is a > chance that the response from the service is lost, > I want to use the lazy pirate pattern per actor. So what I did was add a > tickless service with poll > that sends msgs to a socket (or directly to the same thread that has the > poll ) after a specific delay. > > I think that having payloads on timers is a useful pattern in general. > > 2013/2/5 Pieter Hintjens <[email protected]> > >> On Tue, Feb 5, 2013 at 5:35 PM, Apostolis Xekoukoulotakis >> <[email protected]> wrote: >> >> > If you have a timer to expire after 1m , you dont check every 20 ms if >> it >> > expired, you use poll() that wakes after 1m if no other event happens. >> >> Right. The original goal is to reduce CPU wakeups, so tickless code >> will work nicely on low power devices. The concept comes from the >> Linux kernel: https://lesswatts.org/projects/tickless/ >> >> As well as reducing CPU wakeups it makes it easier to schedule precise >> events, e.g. send PING once per second, even if there was some other >> activity in the meantime. You need this when you are doing anything >> complex. >> >> zmq_poll should IMO have tickless timers built in, and it's something >> I'd like to add to CZMQ (poll class with tickless timers). >> >> -Pieter >> _______________________________________________ >> zeromq-dev mailing list >> [email protected] >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> > > > > -- > > > Sincerely yours, > > Apostolis Xekoukoulotakis > > -- Sincerely yours, Apostolis Xekoukoulotakis
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