Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 24 Nov 2010 14:20:48 -0600

On Wednesday 24 November 2010 13:52:16 Jeff Hill wrote:
>
> Is it possible to know when initiating a put notify if a put notify is
> already pending in any part of the processing chain that it is being
> initiated, and if so, chain initiation of a subsequent put notify to
> completion of the pending put notify? My naive understanding is that all
> records in the same processing chain share a single lock set lock, and also
> a single put notify queue?

As currently implemented the putNotify subsystem is fully dynamic, it doesn't 
know what records will be processed until they are.  I don't see any easy way 
to change that since there might be record types such as the seq, fanout or 
dfanout where we can't know in advance which links will be processed (the SELN 
field value selects one or more links in some modes), and some records might 
be disabled using SDIS anyway.  It seems overly restrictive to include the 
whole lock-set, there can be multiple non-overlapping putNotify groups within 
the same lock-set since nowadays we do not allow an NPP+NMS link to break a 
lock-set into two.

- Andrew
-- 
If a man is offered a fact which goes against his instincts, he will
scrutinize it closely, and unless the evidence is overwhelming, he will
refuse to believe it.  If, on the other hand, he is offered something
which affords a reason for acting in accordance to his instincts, he
will accept it even on the slightest evidence.  -- Bertrand Russell

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System