1. SLC-Aware IOC Review 2 Cluster Status and Test Service Feb 23, 2005
Introduction
Functional Requirements (Stephanie)
CSTR Service Design (Ron)
ASYNC Utilities Design (Ron)

2. SLC Alpha IOC Unix Workstation SCP Users Micro n Forward Browser Error
Database
Forward
Browser
Error
SCP
SCP
SCP
DBGen,
Install
DBEX
CMLOG
Server
SLC Linux Proxy
NFS
Replies
Requests
DB Msgs
Acks
Console Users
IOC
Message
Database
CMLOG Client
SLC IOC Interface
SLC Exec
SLC
Resources
IOC Shell
SLC
Micro n
CA Users
IOC n
Data
Base
EPICS
Device Control
Timing Diags
EPICS
Resources
Gated ADC Acq
Cluster Status HW

3. SLC-Aware IOC Definitions
Job – set of tasks that perform similar functions
MSG, DB, CSTR (TEST), TIME, MGNT, BPMO, IOC (PROXY)
Usually access unique primaries
Handle objects/devices with similar controls interface
One task (Hdlr) handles Alpha requests
Another task (Async) does periodic updates
“Job” is also referred to as “Service” or “Task Groups”
Some jobs include a set of utilities used by other jobs
Function – job action
Hdlr task performs the job’s function codes:
0xAABB where AA identifies job and BB identifies action
Async task performs the job’s “cycling” functions:
Defined by name in CSTR CNAM
Hdlr task will do a subset of Async’s functions

4. Cluster Status and Test (CSTR) Service
Process Messages with the TEST Function Code
TEST_EXISTENCE – from PARANOIA
TEST_ECHO and TEST_ECHO_MWORD
TEST_ERR_METER_RESET - later
Also IOC_STOP – from SLC exec
At init and exit, logs availability change messages
Update of CSTR Supertype 3 Secondaries
Periodically and during TEST message processing
Includes active job check
Later - periodic update of diagnostic EPICS PVs
ASYNC Utilities

5. CSTR Periodic Update Functions
Initialization – update database:
SLC startup (“micro IPL”) timestamp - set to the IPL request timestamp
Job availability bit mask – set based on task active flags
Zero unused CSTR secondaries used for CAMAC, unsupported functions
CHK1 – update database for all job functions:
Timestamps - last Alpha DB update, last execution
Elapsed time – delta time to execute function
Job availability bit mask
CHK2 – update database for all job functions:
Counters - # executions, # times Alpha DB update failed
(reset after update finished)
Percentages - % executions with successful Alpha DB update,
% executions triggered by Alpha request
CHK3 – later – update EPICS diagnostic PV
CPUM – update CPU and memory usage in database with values from EPICS PVs

6. CSTR Supertype 1 Secondaries

7. CSTR Supertype 2 Secondaries

8. CSTR Supertype 3 Secondaries

9. ASYNC Utilities
Job function table initialization - called by DB job right after database download
Wait for cycling function to be ready – called by Async tasks
Update the Alpha database with metering for an input function and update statistics in the table – called by both Hdlr and Async tasks
Update other statistics for an input function – called by both Hdlr and Async tasks
Copy timestamps and elapsed time from tables to the database – called by CSTR Hdlr and Async tasks
Calc, copy, and reset statistics from tables to the database – called by CSTR Async task

10. IOC Shell Routines
Write async function tables for an input, optional job name to the console.
Change the value of CYCL, MTRC, MTRL, or MAXT (supertype 1 data) in the async function table and the database for an input job and function name (dbedit-equivalent).