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DAQ Monitor Tutorial

A tutorial on using the DAQ Monitor, a performance monitoring and diagnostic tool for the DAQ system. Includes instructions on setup and usage.

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DAQ Monitor Tutorial

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  1. DAQ Monitor Tutorial T. Yasuda Fermilab T. Yasuda, Fermilab

  2. Introduction • Purposes • Performance monitoring during a run. • Performance tuning tool during commissioning. • Diagnostic tool in case of problems. • Program • Server (DM_Server) and Client (DAQ_Monitor.py) system. • Communicates with DAQ system elements using itc. • Client displays information using Python/Tkinter GUI modules. T. Yasuda, Fermilab

  3. How it works • DM_Server is: • an itc server with an itc processor to handle messages. • Contains a DM_Task class object. • DM_Task class object contains client objects for DAQ processes, e.g. TCC, Distributor, etc. • The clients objects are private data members of DM_Task class. • Data received from the DAQ processes as an itc message are handled by a callback method of the client object that requested the data. T. Yasuda, Fermilab

  4. How it works • Requests data to the DAQ processes by sending an itc message. • Communicates with receiver clients (Display clients). • Receiver clients send a string message to request data from the DM_Server. T. Yasuda, Fermilab

  5. Collector/ Router L3 Monitor Trigger/DAQ Monitor L1/ L2 TCC L3 Data Logger Data Distributor EXAMINE Trigger/DAQ Monitor Server Monitor Display T. Yasuda 4/26/99 Updated 5/18/01 T. Yasuda, Fermilab

  6. Software • A cvs package: daq_monitor • Written in C++ (server) and python (display client). • Uses itc for communication. • Different message types for individual sub-processes that run C++ server/client. • String and opaque messages only for python (display) clients. • Messages are encoded/decoded in XDR. • Compiles on Linux. T. Yasuda, Fermilab

  7. Instructions • To start the DAQ Monitor server • setup d0online • start_daq_monitor_server • or start_daq daq_monitor_server • To start a DAQ monitor display client (from any online node) • setup d0online • start_daq_monitor_display • or start_daq daq_monitor start_daq daq_monitor_small T. Yasuda, Fermilab

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