Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Fri, 03 Apr 2015 12:12:37 -0400

On 04/03/2015 11:44 AM, Andrew Johnson wrote:
> On 04/03/2015 09:50 AM, Michael Davidsaver wrote:
>> ...
>> I support an alternative would be a memory pool for small arrays (<128
>> bytes?).
> 
> I'm guessing that adding a memory pool would need more invasive work,
> whereas just using the storage already available in the db_field_log
> objects for array data would need no additional memory allocations.

I agree with you.  "support" was meant to be "suppose" :)  Just wanted
it to be considered.

> To be honest I'm slightly surprised that we haven't already done that.
> I'd be in favour of the change Ralph is suggesting using the size, and I
> would even suggest considering allowing the user to adjust how large the
> log buffer is at initialization time. This would allow users to turn on
> DB_EVENT_LOG_STRINGS (which nobody else really knows about anyway)
> without recompiling.

Selecting the size at runtime might mean a more invasive change to
db_field_log.

> A 3.15 change IMHO, as is Matej's pCAS update.

To me, depends on final complexity.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System