Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Fri, 22 Jun 2007 13:23:16 +0200

Peter,
intrCallbackOctet is used to implement "I/O Intr" scanning.
To get more information (which record are involved, etc), try to enable
debugging and direct the debug output to a file:
StreamDebugFile=fopen("filename","w")
streamDebug=1
However, this might give lots of output and the timing might change slightly. I
have seen situations, where the bug disappears when debugging is enabled.
Have you seen similar effects on Linux IOCs? I can't test everything on vxWorks
here, because of the variety of existing hardware.
Does it happen during startup or later? I can't see any direct relation between
autosave and StreamDevice/asyn.
Dirk

Denison, PN (Peter) wrote:

From: Dirk Zimoch [mailto:[email protected]] 
Denison, PN (Peter) wrote:
Asyn 4-8, streamDevice 2-2, EPICS 3.14.8.2, vxWorks 5.5.1
on MVME5500

What port driver are you using? One of those provided with
asyn (serial, TCP, ...) or a third party driver?

We're using the asynSerialPort, on top of a Hytec 8516 RS-485 module in

a Hytec 8002 IP carrier.

About 600 chars: The asynInterposeEos layer uses an internal
buffer of 600 chars which it passes to lower level drivers.
As it may also be a bug in StreamDevice, please send me your
protocol file and records so that I can try to reproduce your

problem.

Sure. We are trying to cut it down to the minimum to cause it to fail,
and also trying to reproduce on a test system, as the production IOC
will have to roll back to a working version for our next run starting on
Monday.
The crash appears to be in StreamDevice (data is trashed between the
calls to callInterruptUsers() and interruptEnd(), seemingly in the
intrCallbackOctet callback).
However, in trying to isolate it, the behaviour changes when autosave
state changes. We are using autosave 4-2-1, with local modifications to
the names of the status PVs.
Thanks for your help - I'll keep you posted.

--
Dr. Dirk Zimoch
Computing and Controls
Paul Scherrer Institut
phone +41 56 310 5182
fax   +41 56 310 4413

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System