GlueX Offline Meeting, October 17, 2012

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GlueX Offline Software Meeting
Wednesday, October 17, 2012
1:30 pm EDT
JLab: CEBAF Center, F326/327


  1. Announcements
  2. Review of minutes from the last meeting: all
  3. Report from the last Data Challenge Meeting
  4. Reconstruction sub-group reports
    1. Calorimeters
    2. Tracking
    3. PID:
      1. GlueX Analysis Factories
      2. GlueX Kinematic Fitting
  5. Preliminary results from raw data tape simulation
  6. CCDB transition: Dmitry
  7. Action Item Review
  8. Review of recent repository activity: all

Communication Information

Video Conferencing


Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2012-4Q on the JLab CUE. This directory is accessible from the web at .



  • CMU: Will Levine, Paul Mattione, Curtis Meyer
  • FSU: Nathan Sparks
  • JLab: Mark Ito (chair), David Lawrence, Yi Qiang, Dmitry Romanov, Simon Taylor, Elliott Wolin, Beni Zihlmann
  • UConn: Richard Jones

Review of minutes from the last meeting

Data Challenge and Software Release

We decided to proceed with the data challenge without waiting for the full implementation of the SEST format. If the format does become available during the Challenge, we will discuss switching it in. Since the principal goal of the Challenge is to produce output in REST format, and only a small fraction of the HDGeant output will be saved, this switching it in is a realistic option.

We will also use the latest version of the BCAL code that does not use the new digitization scheme by default. That avoids the need to re-tune the BCAL reconstruction for the newer scheme.

The version used will also use the latest changes to the REST format recently checked in by Paul.

New CentOS 6 Nodes at JLab

David has run some jobs on the new nodes. These provide a 50% increase in the power of the JLab farm and are as yet only very lightly used. He ran HDGeant-mcsmear-DANA jobs, but without full reconstruction turned on in DANA. Some job configuration lessons have been learned already. Mark will star a mini-challenge using the new nodes soon.

Profiling the Code

We raised the issue of profiling our code again. Some products that were mentioned we discussed using oprofile or gprof. Dmitry, Richard, David, and Mark will propose a solution.

tracking, naomi stereo not consistent with the truth +--+vs -++-

Paul, Nathan, reports problems with simd stuff

elliott data tape fromat almost reday raw event plug-in was written a while ago simulates block mode, single events per block there is some redundancy pythia, pass level 1 trigger fadc 250 125 f1tdc 32 48 channels average 6700 words per event, 4 bytes/per word eliminate empty crates 4800 words close to analyzing this data