Experimental Physics and Industrial Control System
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Replies:
- Re: Slow initial connection using Simple Channel Access Alan Biocca
- Navigate by Date:
- Prev:
RE: problems with OMS motor controller and power pc cpu board mv2306 William Lupton
- Next:
Re: Slow initial connection using Simple Channel Access Alan Biocca
- Index:
1994
1995
1996
1997
1998
<1999>
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
RE: problems with OMS motor controller and power pc cpu board mv2306 William Lupton
- Next:
Re: Slow initial connection using Simple Channel Access Alan Biocca
- Index:
1994
1995
1996
1997
1998
<1999>
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024