Design and Development of a Diagnostics Client for a Beam Loss ...

Design and Development of a Diagnostics Client for a Beam Loss Measurement System at CERN
that a safe execution with no conflicts is guaranteed.
1. Read Data from the socket(s) –TCP always, UDP if applicable;
2. Distribute acquisition/status data;
2.1 Update status panels if enough data;
2.2 Offer Status_Log_Queue filled buffer;
2.3 Condition-signal Status_Log_Queue;
3. Offer Plotting_Queue buffer;
4. Condition-Signal Plotting_Queue;
5. Goto 1;
1. while Plotting_Queue.isEmpty do
wait_for_condition_signal
end
2. Poll buffer;
3. Offer Logging_Queue buffer;
4. Condition_Signal Logging_Queue;
5. Process buffer and plot data;
6. Goto 1;
1. while Logging_Queue.isEmpty do
wait_for_condition_signal
end
2.Poll buffer;
Algorithm 1: Swingworker-Socket Thread
Algorithm 2: Plotting Thread
3.Process buffer and log acquisition data into files;
3.1 Poll status data from the Status_Log_Queue and log them into files;
4. Goto 1;
Algorithm 3: Plotting Thread
The plotting thread uses the settings given by the user to calculate the average, maximum
and minimum values of incoming data and then plots them in the graph of the online panel.
This data reduction depends on the display width of the graph and on the width of the
observation window.
On the other hand, the logging thread is responsible for storing all the data into files (ac-
quisition and status) without data reduction. The data stored in these files will be used
for the offline data display panel, which will be discussed later. Only processed data are
plotted both online and offline. A special format for the data storage was discussed and
agreed. The number of the BLEDP packets in the storage file is configurable with default
value 500000 for the single-channel and 4000000 for the multi-channel transmission. In
the default setting the client application creates one file per each second of acquisition.
The BLEDP packets are written into files with their header. Each file name is composed
Emmanouil I. Angelogiannopoulos 37