USING THE LINK FOR ONLINE MONITORING - MJL 9/6/96
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Looking at histograms, etc.
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1) attach with paw and look at histograms

   paw> global_sect ANLY (attaches to histograms in shared memory)
   paw> greset (if you want to clear histograms)
   paw> exec dchits (or pthits, or hodhits, etc - see *.kumac files)

2) use finder (ask Beddo)

Problems, first the link must be up. To get the link up:
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1) Check if it is already up:

    linkStats (at the VME console)
    ps -ef | grep ltodd (on fn866a)

2) If no linkServer or no ltodd:

    clean unix
       cd dd (on fn866a in e866 account)
       source setup (sets up dd environment)
       clean (repeatedly until it shows no actions)

    if linkServer in VME was still running it will
      now exit after it sees a few packets (wait
      until it does)

3) To start a link connection

   stop run on PDP and on VME
   clean unix (as above)
   dd_start (in dd)
   make sure ltodd up (ps -ef ...)
   linkSetPs 5 (set link prescale factor on VME)
   (number of events per spill / prescale ~= 4 is about right;
    this should give rougly 400 events across link per spill)

3) start run on VME and PDP only after link and analysis are
   started and ready to go

Then start an analysis (run must be stopped on VME & PDP)
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1) cd analydd

   use looper as described below; using run
     directly requiers a different dimu version

   for separate analysis runs for each run
     nohup nice looper >& looper.log &
     (etmbor switch in cmzlogon must be on)
     (looper starts a new analysis job for each
      VME run and puts all the output files in
      files with run number in name, e.g.
      runxxx.log, runxxx.his, runxxx.nt)

   for one continuos run:
     nohup nice run >& run.log &
     (etmbor switch in cmzlogon must be off)

2) make sure analysis running ok

   tail -f run.log

3) If analysis goes astray

   kill dimu and run (and looper)
   restart as above (while run stopped on VME & PDP)