Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Fri, 03 Apr 2015 10:50:45 -0400

On 04/03/2015 10:29 AM, Ralph Lange wrote:
...
> Looking for a minimally invasive fix...
> Would you think it is possible and a good idea to base the queuing type
> decision (by value or by reference) on the size instead of the DBF type,
> so that arrays <= 64 bit total length (or maybe a configurable value)
> are put in the queue by value?
> That would solve our issue, and not create too much exceptionalism, right?

This would be a change to code handling db_field_log* correct?  On the
one hand I think the semantics of using this structure with arrays is
already complicated.

On the other hand enabling DB_EVENT_LOG_STRINGS gives sizeof(union
native_value)==40, which is certainly enough for your case.

I support an alternative would be a memory pool for small arrays (<128
bytes?).

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System