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Level 2 Status and Outlook

This session at the DAQ Fest will discuss the review, issues, and solutions related to level 2 configurations and monitoring. Topics include remaining bugs, separating buffer box stream configs, reliable record of configurations, and automated level 2 stats recording.

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Level 2 Status and Outlook

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  1. Level 2 Status and Outlook Ali Hanks Run 7 DAQ Fest Oct. 18, 2006

  2. Outline • Review: • Making configurations • Monitoring level 2 filtering • Problems to solve: • Remaining bugs • Lvl2 - buffer box stream configs made seperately • No reliable record of configuration kept • Lvl2 stats not automatically recorded DAQ Fest - Lvl2

  3. Creating/Editing lvl2 Configurations • Lvl2 version attached to lvl1 version • Downloaded to disk with GL1 configuration • EvBServer uses Lvl2Control lib to read and send to ATPs • Can use to add existing lvl2 to new lvl1 version or modify lvl2 • There is a special option to add new output streams DAQ Fest - Lvl2

  4. Configuring Bits and Algorithms • Available bits are determined by the lvl1 version selected • All available algorithms can be enabled or disabled for each enabled bit DAQ Fest - Lvl2

  5. Level 2 Monitoring • Lvl2Mon: originally written by GSU • Monitors Lvl1 and Lvl2 trigger decisions • Powerfull diagnostic tool: mostly used by experts during last run • May be useful as part of online monitoring • Was used for writing lvl2 stats to an ascii file DAQ Fest - Lvl2

  6. Remaining Issues for Lvl2 • A few known bugs to be fixed • If forced accept  0 it overrides disabled mode for bits • Occasionally new configurations would not get written properly to db - not clear why • Seems too easy to make a mistake and mess up the db so it can’t be fixed without direct intervention • Streams used for filtering must agree in lvl2 and buffer box configurations • Currently this requires expert intervention, not ideal • Lots of instances when lvl2 was turned off but the buffer boxes were still writing scalars to the lvl2 streams • Possible solution is a buffer box gui connected to lvl2 config gui DAQ Fest - Lvl2

  7. Remaining Issues (cont’d) • Under certain conditions, new lvl1 configurations can be missing a lvl2 configuration - havoc ensues • Need tighter integration of two configurations • Currently a pointer to the Lvl2Config db entry is entered in the runcontrol db • Actual configuration should be entered to guard against erroneous db changes after the fact • Lvl2 statistics are recorded only as ASCII files (by Lvl2Monitor), as an expert (or DO) action • Need to automate this if we want a reliable db-based record DAQ Fest - Lvl2

  8. Lvl2 Rates • Algorithm run time not a problem for pp but could be for Au-Au • Multithreading works well, could it be further optimized? • More ATPs are available • Some algorithms may have room for improvement in efficiency DAQ Fest - Lvl2

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