SLIC monitoring histograms

1
SLIC monitoring histograms

• Finally, DSP5 maintains 4 channel histograms
  (.OR.s
• for all wDSP receiver error, rogue, mute
  misaligned
• channels)
• All histos have 16 bins (16 channels)

• Receiver Errors are upstream channel errors
• Rogue Channel gets an entry when chan.size
  thresh.
• Mute Channel gets an entry when Data Count 0
  
• Misaligned Channel gets an entry when
  crossing, turn s
• different than those from SCL

2
DSP5 does wDSP/SLIC monitoring

• For each DSP (41), DSP5 accumulates
• 4 timing histograms ( input, unpack, process,
  output )
• 1 event-size histogram (wDSP sum of all FE
  inputs,
• headers excluded DSP5 sum of all wDSP
  outputs,
• headers trailers excluded)
• 1 DSP-specific error histogram

(41) DSPs x 6 histograms x short array16 ?
0.94 KBytes

• DSP5 also adds
• 2 more timing histograms ( idle, monitoring )
• 4 channel-related histograms (rogue, mute,
  misaligned,
• receiver error this is an .OR. of
  corresponding bins in all
• wDSP headers trailers)

6 histograms x short array16 ? 0.19 KBytes

• SLIC driver also adds
• 1 channel occupancy histogram ( of events to be
  read)

1 histogram x short array16 ? 0.03 KBytes
This is a maximum of 37 histos per SLIC (1.16
Kbytes) for fully debug-mode monitoring In
reality, the SLIC driver controls the volume of
monitoring information by setting the monitoring
level in DSP5 (via VME)
3
Levels of SLIC monitoring

• Notes
• Non-idle DSP5 time is sum of input, unpack,
• process, output and monitoring times
• From L2 ? L3, .OR. of wDSP errors is eliminated
• From L5 ? L6, non-idle DSP5 time is eliminated
• From L6 ? L7, worst wDSP times are eliminated