Dehong,
I think this shows that the problem is not in channel access, but in the
database or lower. You're not losing monitor callbacks, the record is
posting the same value twice, with the same time stamp. You can get
another clue to what this means by looking at the record-support code,
and finding calls to recGblGetTimeStamp() and calls to db_post_events()
for the CTME field.
Dehong Zhang wrote:
Hi Friends Kay, Mark and Mohan,
Thank you very much for the advices.
I just tried camonitor. It is doing the same thing: throw away every the other
change, but callback two times for the other ones. The printout is like:
fastTimeTest.CTME 2008-08-08 16:46:02.609123 6.88202e+06
fastTimeTest.CTME 2008-08-08 16:46:02.859123 7.38478e+06
fastTimeTest.CTME 2008-08-08 16:46:02.859123 7.38478e+06
fastTimeTest.CTME 2008-08-08 16:46:03.259123 8.01506e+06
fastTimeTest.CTME 2008-08-08 16:46:03.259123 8.01506e+06
fastTimeTest.CTME 2008-08-08 16:46:03.659123 137329
fastTimeTest.CTME 2008-08-08 16:46:03.659123 137329
fastTimeTest.CTME 2008-08-08 16:46:04.059123 817524
fastTimeTest.CTME 2008-08-08 16:46:04.059123 817524
Does the record update time stamps tell anything? Am I running too fast?
Thank you again. Best regards,
Dehong
----- Original Message -----
From: Mohan Ramanathan <[email protected]>
Date: Friday, August 8, 2008 4:43 pm
Subject: RE: Loosing half the monitor callbacks
To: Dehong Zhang <[email protected]>, [email protected]
Hi
Try to set the TPRO field in the IOC to see that it is indeed
processing every time
Mohan
----------------------------------------------------------------
Mohan Ramanathan ([email protected])
Senior Beamline Engineer, Advanced Photon Source
Argonne National Laboratory, Argonne, IL 60439
(630)-252-3773/ (630)-822-5625(Cell)
----------------------------------------------------------------
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----------Original Message----------
From: Dehong Zhang <[email protected]>
Sent: Fri, August 08, 2008 4:30 PM
To: [email protected]
Subject: Loosing half the monitor callbacks
Hi,
I would like to monitor a PV at 5 Hz. Somehow I do get 5 callbacks
every seconds
but only get the changes every the other time, like getting changes
1st, 3rd, 5th ...
two times, but never get changes 2nd, 4th, ...
Could you please enlighten me?
Thanks and best regards,
Dehong
--
Tim Mooney ([email protected]) (630)252-5417
Beamline Controls & Data Acquisition Group
Advanced Photon Source, Argonne National Lab.
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