June 17, 2009 Software

Location

The meeting will be at 2:00 pm in CEBAF Center F326/327.

Telephone

To connect by telephone:

1. dial:
   • 800-377-8846 : US
   • 888-276-7715 : Canada
   • 302-709-8424 : International
2. enter participant code: 39527048# (remember the "#")

Video Conferencing

A) ESNet: 8542553
B) EVO: meeting link

Agenda

1. Review minutes from May 20, 2009 Software meeting
2. Announcements
   1. Special system user account at JLab: gluex
   2. GPU discussion next time
3. New magnetic field maps: David
4. Bug fixes from Richard
5. Kalman Filter update (Simon)
6. Complexity growth in hdgeant: Richard
7. Work disk: Mark
8. Software tag policy
9. Action item review

Minutes

UConn: Richard Jones
JLab: Eugene Chudakov, Mark Ito (chair), David Lawrence, Sascha Somov, Simon Taylor, Beni Zihlmann

Review of Last Meeting's Minutes

We spent some time discussing Matt's suggestion (from two meetings ago, actually) of having all random-number related processes, such as smearing, occur in a stage before reconstruction and having the results of that stage written to disk. David pointed out that there is already a program, mcsmear that takes the hdgeant output and produces smeared hits in HDDM format, suitable for the reconstruction program. Right now only tracking is smeared but it would be straightforward to do smearing of the calorimeters as well.

Action Items

1. Introduce calorimeter smearing into mcsmear.
   • Mark will mention this to Matt.
   • David will consult with Matt on how this can be done.

Notes

   * already being done for tracking
   * truth points are not being smeared
   * mcsmear point out to Matt
   * root converter exists, documented in howto
   * conflicting answers in where-am-I root cause of no-hit, change made to gtnext, people should try, virtual divisions introduced this feature (eugene)
   * 2 gb switch -D needs to be included
   * simon, kalman filter
         o things look much better
   * richard complexity
         o rebuilding geant difficulty
         o distance of closest approach to a line, tracking, hdgeometry
         o back out tracking
         o arc correction
   * jim software task query (Dave) task list