Re: [boost] Boost.Fiber - interruptible fibers

Subject: Re: [boost] Boost.Fiber - interruptible fibers
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2014-01-11 15:59:19

Le 11/01/14 21:52, Vicente J. Botet Escriba a écrit :
> Le 11/01/14 19:40, Oliver Kowalke a écrit :
>> 2014/1/11 Vicente J. Botet Escriba <vicente.botet_at_[hidden]>
>>
>>> Boost.Thread interruption feature adds some overhead to all the
>>> synchronization functions that are interruption_points.
>>> It is too late for Boost.Thread, but what do you think about having a
>>> simple fiber class and an interruptible::fiber class?
>>>
>> boost.fiber already support interruption
>> (boost::fibers::fiber::interrupt()) - in contrast to boost.thread it is
>> simply a flag in an atomic variable.
>>
> Do you mean that the cost of the managing interruptible threads is null?
> Don't forget that you need to manage with the waiting condition 
> variables so that you can interrupt the fiber, which has some cost 
> independently of whether you use an atomic or a mutex.
>
Ah, I forgot. You need to access the fiber specific storage of the fiber 
for each consdition_variable::wait operation, which is far from been an 
operation without cost.
> The same argument you are using to support several schedulers should 
> apply here, as it is evident to me that the interruption management 
> has a performance cost.
>
> Best,
> Vicente