Re: enhanced seq record

[Luedeke Andreas <Andreas.Luedeke@psi.ch>]

Benjamin Franksen wrote:

> On Saturday 28 January 2006 00:52, Chestnut, Ronald P. wrote:
>  
>
> > If you do change the seq record (or make a new one), can you please
> > change the behaviour for a "0" delay? Now a new thread is started for
> > each (DOL/LNK) pair. If the delay is zero, can you "just do it" in
> > the same thread? We found that for some big "explosions" (nested
> > SEQs) the task switching dominates the processing time.
> >    
> [...]
>
> However, it /does/ request a callback for each group, regardless whether
> the delay is zero or not, and this can indeed cause unnecessary context 
> switches. So, yes, I will change this. Adjacent link groups with zero 
> delay will be processed in a synchronous manner i.e. w/o requesting a 
> callback.
>
> Thanks for the hint.
If I remember correctly the "seq" record is 100% asynchronous.
If you specify delays of "0", all DOLn links are supposed to be read at 
the same time.
How do you want to do this without a callback?
(You need it to place the value into DOn when it's received and then 
write it to LNKn.)

But of course it would be sometimes useful to have a synchronous process 
chain,
where the next link is processed after the the previous one completed 
and then the delay elapsed.

Regards
Andreas