Thursday, June 05, 1997

Block of data serviced by TCC for the L2 Global
-----------------------------------------------

We are thinking here about all types and classes of information.
This is in no way a complete list.  Just a first shot.

1. Monitoring data
  (some fixed format block read out every 5 sec)

    scalers
       sptrg scalers
            L2 input count (possibly rely solely on L1FW)
            L2 Pass count (possibly rely on L2 FW)
            MFP count (possibly done in L1FW)
       tool scalers
            try
            pass
            fail
            processing time
       overall performance scalers
            number of cycles
            number of skip
            number of pass, fail
            number of input format errors
            number of process error
            number of MFP
            input fifo empty at end of event
            input fifo full, delay transfer of next event
            output fifo empty
            event processing time (last event, average, min/max...?)
            time wait between events
            Magic Bus busy ratio
            processing duty ratio
            VBD readout duty ratio

    programming
       which sptrg has filters attached
       how many tools for each sptrg

    states
        running/waiting or monit data fresh/stale
        number of events in input fifo
        number of events in output fifo
        VBD state and status

2. Run Log information
  (stuff you want to end up in a file on TCC)

    Programming feedback (with time stamps)
    start /stop run (if known)
    Tool Initialization OK or problems
    Heartbeat time stamp

3. Operation Error/Warning/Information messages
  (variable, asynchronous messages serviced every 5 sec)

    Global
        No Sptrg need processing = Skip
        Notice long time since last event
        No input buffer slot available, delay event read
        No output buffer slot availble, delay event processing

    Input
        event pieces don't match (error goes to SCL, but report anyway)
        data format, checksum
        communication problem with Worker

    Sptrg
        Pass Rate too high
        Pass Rate too low

    Tool
        Pass Rate too low/high
        Expected input not found (e.g no candidates)
        Too many candidates, overflow

    Output
        communication problem with Worker
        formatting
        VBD problem

4. Immediate Attention from TCC
  (something that can't wait 5 second AND that TCC can do something about)
  (if only the DAQEXP can help, maybe no need to interrupt TCC)

    L2 FW decision doesn't match the pass/fail L2 Answer
    Panic, L2 system hosed, no more 5s information or automatic recovery