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DAQ & Online

DAQ & Online. Definition of real-time processes in the farm Online calibration manage Insert of T3filter DAQ real run with t3filter. Definition of real-time processes in the farm.

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DAQ & Online

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  1. DAQ & Online • Definition of real-time processes in the farm • Online calibration manage • Insert of T3filter • DAQ real run with t3filter W. Mei for DAQ & Online

  2. Definition of real-time processes in the farm • reduce stack size to lock the processes in physical memory and always keep higher priority than usual processes. • farm receiver, farm builder and T3filter are real-time processes now. (recompile must be executed in KRUNC. -rwxrwx--x -> -rwsrws--- ) W. Mei for DAQ & Online

  3. Online Calibration manage • To reduce calibration time for data reconstruction • New scripts allow T0gmake2 (f08, end of run) to submit two processes “calib_ene” and “calib_time” to a given machine now is f34. • Calibmon_db2 (f04) • TCL interface monitoring online calibration flags from DB2, started by RUNCTL W. Mei for DAQ & Online

  4. “ll” package (Load Leveler) that is running in all offline machines as well as fibm08 (“llq –H” to get all help). • llstatus report all offline machine status • llq report job status in current machine. • llqk is allqalias, which is using frequently, reports step-id, step-name, job status, queue date, class and host. W. Mei for DAQ & Online

  5. Insert of T3filter • In the last week of data taking the trigger system was changed • Cosmic veto: flags all cosmic events but does not throw them away. • Cosmic events are analyzed by a software component-t3filter included in the main data flow • The main data flow on farm is: W. Mei for DAQ & Online

  6. Receive --> builder (B_T2_1_1) --> T3filter (B_1_1) --> recorder (main recorder) • Most of the monitoring processes take data from the builder buffer which is now B_T2_1_1 • T3filter also collects 1/64 of random cosmic events for system studies W. Mei for DAQ & Online

  7. Many packages modified: • Farm package • Kid, for new buffer definition • Daqset, for creation new online process-t3filter • Runctrol and graphic interface (build events = ~3.6Khz before t3filter, total events = ~2.0Khz after t3filter on disk) • Monitor packages W. Mei for DAQ & Online

  8. DAQ real run with t3filter • Part history of runs on Dec. 7th. with T3filter • 0.3 – 2.8MB/s, chain (10MB — 13MB/s in total), • Use of the total CPU on a farm • Overview of the system within beam lost compare with normal status W. Mei for DAQ & Online

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  11. Receiver buffer c10 c1 c2 c3 builder t3filter recorder W. Mei for DAQ & Online

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  14. Conclusion • DAQ works well (10-13MB/s) 3.6Khz acquired, 2.0Khz written on disk • No limit from system resources • idle time 33%-55% depending on archiving status. Wait time is almost zero • Is able to extend to higher throughput without problem W. Mei for DAQ & Online

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