Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Wed, 4 Feb 2009 14:45:06 -0600

Jeff,

I have now proven that there is a change in the behavior of the beacon
address list from 3.14.8.2 to 3.14.10 on both Linux and Win32.  Linux
and Win32 seem to behave identically, contrary to what I originally
thought.

On 3.14.10 if EPICS_CA_AUTO_ADDR_LIST=NO and EPICS_CA_ADDR_LIST is
manually set (even to the same as the default would be if
EPICS_CA_AUTO_ADDR_LIST were YES) then the beacon address list is empty.

On 3.14.8.2 this is not the case, even if EPICS_CA_AUTO_ADDR_LIST=NO
then a correct beacon address list is created.

Here is the proof on a Linux system running 3.14.10:

Here is what I get with EPICS_CA_ADDR_LIST and EPICS_CA_AUTO_ADDR_LIST
undefined:

epics> epicsPrtEnvParams
EPICS_AR_PORT: 7002
EPICS_CAS_AUTO_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_PERIOD is undefined
EPICS_CAS_BEACON_PORT is undefined
EPICS_CAS_IGNORE_ADDR_LIST is undefined
EPICS_CAS_INTF_ADDR_LIST is undefined
EPICS_CAS_SERVER_PORT is undefined
EPICS_CA_ADDR_LIST is undefined
EPICS_CA_AUTO_ADDR_LIST: YES
EPICS_CA_BEACON_PERIOD: 15.0
EPICS_CA_CONN_TMO: 30.0
EPICS_CA_MAX_ARRAY_BYTES: 10000000
EPICS_CA_MAX_SEARCH_PERIOD: 300.0
EPICS_CA_REPEATER_PORT: 5065
EPICS_CA_SERVER_PORT: 5064
EPICS_CMD_PROTO_PORT is undefined
EPICS_IOC_LOG_FILE_COMMAND is undefined
EPICS_IOC_LOG_FILE_LIMIT: 10000000
EPICS_IOC_LOG_FILE_NAME: /home/epics/logs/IOC.log
EPICS_IOC_LOG_INET is undefined
EPICS_IOC_LOG_PORT: 7004
EPICS_TIMEZONE: CUS::360:030902:110202
EPICS_TS_NTP_INET is undefined
IOCSH_HISTSIZE: 50
IOCSH_PS1: epics>

epics> casr 20
...
There are currently 282784 bytes on the server's free list
6 client(s), 422 channel(s), 422 event(s) (monitors) 0 putNotify(s)
14 small buffers (16384 bytes ea), and 0 jumbo buffers (10000024 bytes
ea)
The server's resource id conversion table:
Bucket entries in use = 90 bytes in use = 17844
Bucket entries/hash id - mean = 0.021973 std dev = 0.146594 max = 1
The server's array size limit is 10000024 bytes max
Channel Access Address List
164.54.160.255:5065

So that is fine the beacon Channel Access Address List is set to
164.54.160.255:5065, which is correct. Now here is what I get with
EPICS_CA_AUTO_ADDR_LIST=NO and EPICS_CA_ADDR_LIST=164.54.160.255, i.e.
the same as the default value if it is not manually set.

epics> epicsPrtEnvParams
EPICS_AR_PORT: 7002
EPICS_CAS_AUTO_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_PERIOD is undefined
EPICS_CAS_BEACON_PORT is undefined
EPICS_CAS_IGNORE_ADDR_LIST is undefined
EPICS_CAS_INTF_ADDR_LIST is undefined
EPICS_CAS_SERVER_PORT is undefined
EPICS_CA_ADDR_LIST: 164.54.160.255
EPICS_CA_AUTO_ADDR_LIST: NO
EPICS_CA_BEACON_PERIOD: 15.0
EPICS_CA_CONN_TMO: 30.0
EPICS_CA_MAX_ARRAY_BYTES: 10000000
EPICS_CA_MAX_SEARCH_PERIOD: 300.0
EPICS_CA_REPEATER_PORT: 5065
EPICS_CA_SERVER_PORT: 5064
EPICS_CMD_PROTO_PORT is undefined
EPICS_IOC_LOG_FILE_COMMAND is undefined
EPICS_IOC_LOG_FILE_LIMIT: 10000000
EPICS_IOC_LOG_FILE_NAME: /home/epics/logs/IOC.log
EPICS_IOC_LOG_INET is undefined
EPICS_IOC_LOG_PORT: 7004
EPICS_TIMEZONE: CUS::360:030902:110202
EPICS_TS_NTP_INET is undefined
IOCSH_HISTSIZE: 50
IOCSH_PS1: epics> 

epics> casr 20
...
There are currently 282784 bytes on the server's free list
6 client(s), 422 channel(s), 422 event(s) (monitors) 0 putNotify(s)
14 small buffers (16384 bytes ea), and 0 jumbo buffers (10000024 bytes
ea)
The server's resource id conversion table:
Bucket entries in use = 90 bytes in use = 17844
Bucket entries/hash id - mean = 0.021973 std dev = 0.146594 max = 1
The server's array size limit is 10000024 bytes max
Channel Access Address List
epics>

So the Channel Access Address List is undefined if
EPICS_CA_AUTO_ADDR_LIST is NO.

This is definitely new behavior.  In this case no beacons are sent, and
hence clients will be very slow to reconnect. 

Here is the output when I run a 3.14.8.2 IOC on the same Linux system
with the same environment variable settings.

epics> coreRelease
########################################################################
####
###  EPICS IOC CORE built on Oct  6 2008
###  EPICS R3.14.8.2 $R3-14-8-2$ $2006/01/06 15:55:13$
########################################################################
####

epics> epicsPrtEnvParams
EPICS_AR_PORT: 7002
EPICS_CAS_AUTO_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_PERIOD is undefined
EPICS_CAS_BEACON_PORT is undefined
EPICS_CAS_IGNORE_ADDR_LIST is undefined
EPICS_CAS_INTF_ADDR_LIST is undefined
EPICS_CAS_SERVER_PORT is undefined
EPICS_CA_ADDR_LIST: 164.54.160.255
EPICS_CA_AUTO_ADDR_LIST: NO
EPICS_CA_BEACON_PERIOD: 15.0
EPICS_CA_CONN_TMO: 30.0
EPICS_CA_MAX_ARRAY_BYTES: 10000000
EPICS_CA_MAX_SEARCH_PERIOD: 300.0
EPICS_CA_REPEATER_PORT: 5065
EPICS_CA_SERVER_PORT: 5064
EPICS_CMD_PROTO_PORT is undefined
EPICS_IOC_LOG_FILE_COMMAND is undefined
EPICS_IOC_LOG_FILE_LIMIT: 10000000
EPICS_IOC_LOG_FILE_NAME: /home/epics/logs/IOC.log
EPICS_IOC_LOG_INET is undefined
EPICS_IOC_LOG_PORT: 7004
EPICS_TIMEZONE: CUS::360:040202:102902
EPICS_TS_NTP_INET is undefined
IOCSH_HISTSIZE: 50
IOCSH_PS1: epics>

epics> casr 20
...
There are currently 285316 bytes on the server's free list
6 client(s), 443 channel(s), 443 event(s) (monitors) 0 putNotify(s)
14 small buffers (16384 bytes ea), and 0 jumbo buffers (10000024 bytes
ea)
The server's resource id conversion table:
Bucket entries in use = 69 bytes in use = 17508
Bucket entries/hash id - mean = 0.016846 std dev = 0.128693 max = 1
The server's array size limit is 10000024 bytes max
Channel Access Address List
164.54.160.255:5065

So on 3.14.8.2 it builds a correct beacon address list, even if
EPICS_CA_AUTO_ADDR_LIST=NO.

Mark

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System