Experimental Physics and
Industrial Control System

"Dale L. Brewe" <[email protected]> · Fri, 09 Apr 1999 09:51:54 -0500

I've been using the Simple Channel Access libraries under NT, and have
noticed that the time to make an initial connection is quite long. For
example, using the routine cache_getbyname, it takes about 45sec to get 140
values initially (~0.33sec/value). I've also tried the batch routines
que_get and do_get, with a marginal improvement (to ~0.25sec/value), which
is still pretty difficult to live with. Can anyone tell me if they have a
similar experience? Is this an inherent limitation of these
functions/library, or is it possible to improve the performance? My ioc
uses epics 3.13beta11 and my client (based on LabVIEW) has used sca3.dll
and ca.dll for 3.13.0 and previous versions.
Thanks
Dale Brewe
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Dale L. Brewe     PNC-CAT/U. of Washington
 ph: 630 252 0582         fax: 630 252 0580
 Mail:
 APS/Argonne National Laboratory
 Bldg 435E sector 20
 9700 S. Cass Ave.
 Argonne, IL 60439
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System