Experimental Physics and
Industrial Control System

"Jeff Hill" <[email protected]> · Tue, 18 Sep 2007 08:59:16 -0600

Hi Ben,

You might try commenting out iocInit in the startup script, and then after
the IOC boots up type "sp iocInit". When it fails type "tt <task id>" to get
the stack trace. If that doesn't help you might also build for debugging and
attach the Tornado debugger to the IOC.

Jeff

> -----Original Message-----
> From: [email protected] [mailto:tech-talk-
> [email protected]] On Behalf Of Benjamin Franksen
> Sent: Tuesday, September 18, 2007 7:32 AM
> To: [email protected]
> Subject: Asyn/VXI-11 problems
> 
> Hi,
> 
> we have trouble trying to control a scope (Tektronix DPO7254) via VXI-
> 11. It
> started after the scope's firmware was upgraded to fix some (unrelated)
> bug. However, the side-effect is that our IOC (linux) now crashes:
> 
> #!../../bin/linux-x86/SIOC3CP
> # Change to top directory
> cd ../..
> ########################################################### Set up
> Environment
> epicsEnvSet IOC SIOC3CP
> epicsEnvSet LOG_DIR /opt/IOC/log
> epicsEnvSet EPICS_CA_PUT_LOG_INET 192.168.48.97
> epicsEnvSet STREAM_PROTOCOL_PATH db
> ############################################## Register all support
> components
> dbLoadDatabase dbd/SIOC3CP.dbd 0 0
> SIOC3CP_registerRecordDeviceDriver pdbbase
> ############################################################ Configure
> drivers
> # Configure asyn vxi-11 driver for DPO7254 device
> vxi11Configure L1 SCOPE1ZCP.mlscs.bessy.de 0 1 inst0 0 0
> asynSetTraceMask L1 -1 0x001f
> 2007/09/18 11:46:36.129 L1 -1 exception 3 occurred calling
> exceptionUser
> asynSetTraceIOMask L1 -1 0x0003
> 2007/09/18 11:46:36.129 L1 addr -1 queueRequest priority 3 not
> lockHolder
> 2007/09/18 11:46:36.129 L1 -1 exception 4 occurred calling
> exceptionUser
> asynSetOption L1 -1 rpctimeout 10
> 2007/09/18 11:46:36.129 L1 addr -1 queueRequest priority 3 not
> lockHolder
> 2007/09/18 11:46:36.129 L1 addr -1 queueRequest priority 0 not
> lockHolder
> 2007/09/18 11:46:36.129 asynManager connect queueCallback port:L1
> 2007/09/18 11:46:36.129 L1 addr -1 vxiConnect
> 2007/09/18 11:46:36.129 L1 vxiConnectPort
> 2007/09/18 11:46:37.078 L1SRQ read error: Connection reset by peer
> 2007/09/18 11:46:37.078 L1SRQ vxiSrqThread terminating
> 2007/09/18 11:46:37.078 L1 vxiCreateIrqChannel VXI: channel not
> established
> (create_intr_chan)
> 2007/09/18 11:46:37.078 L1 Warning -- SRQ not operational.
> 2007/09/18 11:46:37.078 L1 -1 exception 0 occurred calling
> exceptionUser
> [1]    19274 segmentation fault  (; cd
> SIOC3CP/iocBoot/iocSIOC3CP; ./st.cmd; )
> 
> Most probably the scope's new firmware is at fault for sending strange
> responses or something. Anyway, asyn should not crash, even if the
> device
> sends protocol errors.
> 
> We have tried several versions of asyn (4-5, 4-6, 4-8) and several
> versions
> of stream (all versions from 1.1 to the latest snapshot) but they all
> display teh same or similar behavior. The base release is 3.14.8.2.
> 
> Our main problem is that the scope should be operational at the start
> of
> next week when out shutdown ends. So, our next step will be to try
> communication via a GPIB gateway.
> 
> Still, any advice on how to search for and maybe fix the error that
> lets
> asyn crash would be appreciated.
> 
> Cheers
> Ben
> --
> "Programming = Mathematics + Murphy's Law" (E.W.Dijkstra)

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System