Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Thu, 22 Sep 2005 07:31:18 -0500

Geoff Savage wrote:
Hi,
We have overflowed the stack of the scan5 task by putting too many
records at a 5 second scan rate. What is the best way to handle this
situation? Aside from reducing the number of records.
Thanks, Geoff

The other reply's all give good advice so I just want to add a couple of
comments
The number of records in a particular scan set will NOT cause a stack
overflow. Thus
What can cause a stack overflow is too many records linked together via
forward links or process passive database links. A linked record is
processed by a recursive call to dbProcess. Each call uses additional
stack space.
Another thing that cause stack overflow is support routines allocating
lots of stack space. For example
void badSupport( ...)
{
     double data[1000];
     ...
}
The above allocates 8000 bytes of stack space.
Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System