RE: epicsThreadSuspendSelf()

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Ø  callbackRequest: cbLow ring buffer full

Ø  A call to 'assert(ev_que->evque[ev_que->putix] == EVENTQEMPTY)'

 

That is a problem when you have lots of records doing callbacks quickly.

 

You just need to increase the size of the callback queue before iocInit in your startup script.

 

Here is an example:

# Set the callback queue size to 5000, up from default of 2000 in base.

# This can be needed to avoid errors "callbackRequest: cbLow ring buffer full".

callbackSetQueueSize(5000)

 

Mark

 

 

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Tagger, Jueri via Tech-talk
Sent: Monday, May 4, 2020 9:56 AM
To: tech-talk at aps.anl.gov
Cc: Papu, Joseph <jpapu at bnl.gov>
Subject: epicsThreadSuspendSelf()

 

callbackRequest: cbLow ring buffer full

A call to 'assert(ev_que->evque[ev_que->putix] == EVENTQEMPTY)'

    by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 769.

Dumping a stack trace of thread 'CAS-client':

[          0x54b86b]: ../../bin/linux-x86_64/CryD(epicsStackTrace+0x4b)

[          0x5467fa]: ../../bin/linux-x86_64/CryD(epicsAssert+0x3a)

[          0x4daa3b]: ../../bin/linux-x86_64/CryD(db_queue_event_log+0xcb)

[          0x4dac8d]: ../../bin/linux-x86_64/CryD(db_post_single_event+0x3d)

[          0x4ffce7]: ../../bin/linux-x86_64/CryD(event_add_action+0x1b7)

[          0x5005de]: ../../bin/linux-x86_64/CryD(camessage+0x9e)

[          0x4fd00c]: ../../bin/linux-x86_64/CryD(camsgtask+0x12c)

[          0x54789c]: ../../bin/linux-x86_64/CryD(start_routine+0xdc)

[    0x7f3c14cdf064]: /lib/x86_64-linux-gnu/libpthread.so.0(start_thread+0xc4)

[    0x7f3c13b9c62d]: /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)

EPICS Release EPICS R3.15.5.

Local time is 2020-05-03 13:45:51.091659821 EDT

Please E-mail this message to the author or to tech-talk at aps.anl.gov

Calling epicsThreadSuspendSelf()

Thread CAS-client (0x7f3bc4016f20) suspended

callbackRequest: cbLow ring buffer full

 

Any ideas?