DESIGN AND SIMULATION OF THE ON-LINE TRIGGER AND RECONSTRUCTION FARM FOR THE HERA-B EXPERIMENT

I.C. Legrand, U. Gensch, H. Leich and P. Wegner
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I.C. Legrand: DESY Deutsches Elektronen-Synchrotron Institut fuer Hochenergiephysik, Zeuthen, Germany
U. Gensch: DESY Deutsches Elektronen-Synchrotron Institut fuer Hochenergiephysik, Zeuthen, Germany
H. Leich: DESY Deutsches Elektronen-Synchrotron Institut fuer Hochenergiephysik, Zeuthen, Germany
P. Wegner: DESY Deutsches Elektronen-Synchrotron Institut fuer Hochenergiephysik, Zeuthen, Germany

International Journal of Modern Physics C (IJMPC), 1995, vol. 06, issue 04, 489-494

Abstract: The common third level trigger and forth level reconstruction farm for the future HERA-B experiment will have to perform full on-line event reconstruction and calibration for an expected input rate of 2000 events/s. More than a hundred powerful RISC processors connected in a network capable of distributing several hundreds of MB/s with low latency are likely to be necessary for this task.Proper simulation of the real time multi-processor systems is central for an optimal design (hardware and software protocol) of a scalable and flexible parallel data processing architecture. A discrete event, process oriented simulation developed in concurrent μC++ is used as a framework for modelling and evaluating different farm architectures. An object oriented graphic interface to the simulation allows the monitoring of various features and provides an easier way to optimize the system.

Date: 1995
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DOI: 10.1142/S0129183195000332

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