[Olsr-dev] olsr polling/threading/mainloop/scheduler

[Henning Rogge]

OLSRd stable already use select to wait between timer events... just
at the moment there is a maximum waiting time.

There is no socket polling in OLSRd I think.

Henning Rogge

On Fri, Mar 30, 2012 at 17:26, Ferry Huberts <(spam-protected)> wrote:
>
>
> On 30-03-12 16:07, Henning Rogge wrote:
>>
>> I think its "polling", but its just polling every 50 ms
>> (configurable), so its not busy waiting. It should not do much to the
>> power consumption.
>>
>> The scheduler in the new "olsr framework" can sleep arbitrary times,
>> so its not polling at all anymore.
>>
>
> I don't understand what you mean.
>
> I meant that (for sockets) we should just use the select() method on a
> socket set instead of polling the sockets.
>
> If we use pselect then we can send a signal to ourselves to mix in the
> timers, so that we might be able to avoid threading (!)
>
> Then we'd have _no_ polling, and everything event driven without threading.
> Now that would be sweet :-)
>
>
>
>> Henning
>>
>> On Fri, Mar 30, 2012 at 17:00, Ferry Huberts<(spam-protected)>  wrote:
>>>
>>> Hi guys,
>>>
>>> I've been looking at the scheduler in the current olsr version, stable
>>> branch.
>>>
>>> I've seen that the mainloop uses polling of sockets and timers.
>>> I can understand that this design came from the strong desire of not have
>>> threading.
>>>
>>> However,...
>>>
>>> This setup is killing w.r.t power consumption, and performance too (!)
>>>
>>> I propose to have olsr v2 be exclusively event-driven and to use _no_
>>> polling at all.
>>> This (almost automatically) also means that threading will be introduced.
>>>
>>>
>>> I can help out with the design.
>>>
>>>
>>> Thoughts?
>>>
>>>
>>> --
>>> Ferry Huberts
>>>
>>>
>>> --
>>> Olsr-dev mailing list
>>> (spam-protected)
>>> https://lists.olsr.org/mailman/listinfo/olsr-dev
>>
>>
>>
>>
>
> --
> Ferry Huberts



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