Experimental Physics and
Industrial Control System

From: "Bertrand H.J. Biritz" <[email protected]>

Date: November 13, 2006 9:35:55 PM PST

To: Janet Anderson <[email protected]>

Subject: Re: devSNMP: Thread error?

Hi Janet,

thank you very much for the information and the IOC.

I compiled it and tried running the IOC, but got the same thread error message - see below.

Also, how hard would it be for me to implement SNMP writes? My programming skills right now with EPICS are going to be looking at how the reads and done and duplicating those, subbing in "writes" where appropriate.

Thanks for taking the time,

Bertrand

$../../bin/linux-x86/test st.cmd

#!../../bin/solaris-sparc/test

## You may have to change test to something else

## everywhere it appears in this file

< envPaths

epicsEnvSet(ARCH,"linux-x86")

epicsEnvSet(IOC,"ioctest")

epicsEnvSet(TOP,"/opt/epics/modules/soft/snmp/")

epicsEnvSet(EPICS_BASE,"/opt/epics/base-3.14.8.1")

cd /opt/epics/modules/soft/snmp/

## Register all support components

dbLoadDatabase("dbd/test.dbd")

test_registerRecordDeviceDriver(pdbbase)

## Load record instances

dbLoadRecords("db/ioctraffic.db","device=testHost,community=public")

cd /opt/epics/modules/soft/snmp//iocBoot/ioctest

iocInit()

Starting iocInit

############################################################################

###  EPICS IOC CORE built on Dec 28 2005

###  EPICS R3.14.8.1 $R3-14-8-1$ $2005/12/20 14:59:00$

############################################################################

commonSessionSetup: Calling init_snmp

net-snmp version=5.0.9

pthread_attr_setstacksize error Invalid argument

epicsSnmpInit: Created thread snmpTaskRead

Opening snmp session to testHost

Opening snmp session to testHost

Opening snmp session to testHost

Opening snmp session to testHost

iocInit: All initialization complete

#Repeat the following command to process the SNMP records

dbpf "snmp:eventGen.PROC","1"

DBR_UCHAR:          1         0x1

snmpTaskSend: sess == NULL: Unknown host (testHost)

snmpTaskSend: sess == NULL: Unknown host

snmpTaskSend: sess == NULL: Unknown host

snmpTaskSend: sess == NULL: Unknown host

On Nov 13, 2006, at 11:55 AM, Janet Anderson wrote:

Hi Bertrand,

I started with the original devSNMP written by Richard Dabney at

LANL and I could not get it to work at all (core dumps) when I had

a large number of snmp records, so I made major modifications to the

code, making the devSNMP records true EPICS asynchronous records with

callbacks. I now have a test soft ioc running with 2000+ snmp records

and have had no problems.

I have not committed my snmp changes but I have attached a tar file of

my code for you if you are interested. I made changes to all 4 supported

record types and have tested my changes for the Si record type. I did some

testing for the Ai, and Li record type changes and very minor testing for

the Wf changes.

So far only gets are supported. No writes are done and traps are not handled.

Janet