Re: warning: multiple interrupt callbacks between processing when running testAsynPortDriverApp

[Maren Purves via Tech-talk <tech-talk@aps.anl.gov>]

Looks like your hardware (and commands to it) may be running faster than you are processing the data.

Maren

On Sun, May 21, 2023 at 10:49 PM Wang, Lin via Tech-talk <tech-talk@aps.anl.gov> wrote:

Dear all,

testAsynPortDriver is a pretty good example for learning basic usage of asynPortDriver, however I encountered a warning message that I do not understand when made some modifications and ran it.

The initial status of the digital scope simulator is "Stop", if I try to set the initial status to "Run" by changing Line 102 of https://github.com/epics-modules/asyn/blob/master/testAsynPortDriverApp/src/testAsynPortDriver.cpp 

from

setIntegerParam(P_Run,               0);

to 

setIntegerParam(P_Run,               1);

then make and add "asynSetTraceMask("testAPD", 0, 0x20)" to the end of st.cmd, the following warning will display continuously,

epics>
epics>
epics> 2023/05/22 01:05:14.319 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:14.819 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:15.320 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:15.820 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:16.320 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:16.820 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:17.321 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:17.821 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:18.322 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing
2023/05/22 01:05:18.822 testAPD:scope1:Waveform_RBV devAsynXXXArray::process, warning: multiple interrupt callbacks between processing

In order to install the old MEDM, the test environment is old as follows,

Debian 7 wheezy

base-3.14.12.5

asyn-R4-44-2

Any hint or suggestion is appreciated.

Thanks,

Lin