Experimental Physics and
Industrial Control System

"[email protected]" <[email protected]> · Thu, 25 Oct 2018 14:45:06 +0000

Hello,

I have an IOC with a busy record connected to an asyn parameter within an area detector application.  If I perform multiple caputs to the record occasionally I appear to get two writeInt32 calls in quick succession.  I'm performing the caput calls from a script to ensure I've eliminated any involvement from a GUI.

Below shows the output from asynTrace when this occurs:

2018/10/25 15:12:52.238 ODN.OD addr 0 queueRequest priority 0 not lockHolder
2018/10/25 15:12:52.238 asynManager::portThread port=ODN.OD callback
2018/10/25 15:12:52.238 Param[ODIN_HDF5_WRITE]::put<bool>: 1
2018/10/25 15:12:52.238 Param[ODIN_HDF5_WRITE]::fetch<int>: 0
2018/10/25 15:12:52.238 Param[ODIN_HDF5_WRITE]::basePut: 'true'
2018/10/25 15:12:52.241 OdinDataDriver:writeInt32: function=100, value=1
2018/10/25 15:12:52.241 EXCALIBUR:OD:Capture devBusyAsyn::interruptCallback pr->val=1, new value=1
2018/10/25 15:12:52.241 EXCALIBUR:OD:Capture devBusyAsyn::processCallback value 1

2018/10/25 15:12:52.241 ODN.OD addr 0 queueRequest priority 0 not lockHolder
2018/10/25 15:12:52.241 asynManager::portThread port=ODN.OD callback
2018/10/25 15:12:52.241 Param[ODIN_HDF5_WRITE]::put<bool>: 1
2018/10/25 15:12:52.241 Param[ODIN_HDF5_WRITE]::fetch<int>: 0
2018/10/25 15:12:52.241 Param[ODIN_HDF5_WRITE]::basePut: 'true'
2018/10/25 15:12:52.245 OdinDataDriver:writeInt32: function=100, value=1
2018/10/25 15:12:52.245 EXCALIBUR:OD:Capture devBusyAsyn::processCallback value 1

This is intermittent and the rate of occurrence is altered by turning on the asynTrace debug.
I'm using

asyn 4-31
ADCore 2-6
EPICS R3.14.12.3
RHEL 6

Is this an issue that anyone has noticed before?  I can see that many of our detector application implementations would silently ignore this but in this application we are queueing acquisitions and so we observe in the queue a duplicate request.

Thanks, Alan

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System