CANoe DENoe - KEMT FEI TUKE

Normal Oper. Load Oper. Overload
Figure 41: Fill Level of the Ring Buffer
High water mark
For testing purposes you can provoke overload situations yourself by taking hold of
the title bar of the main window with the mouse or by moving the window on the
screen. This will interrupt the main program's data display until you release the title
bar again. The work of the real-time library, however, remains unaffected by these
actions. If messages are being registered on the bus, the ring buffer will be filled
without the data being able to be processed by the main program, and as a result the
queue will overrun. As soon as you release the title bar you can observe the effects
of this overrun in the individual windows.
2.5.4 Optimizing Performance
To make it easier for you to configure CANoe for high bus loads, a performance wizard
is provided under the menu items Help│Performance│Optimization and
Help│Performance│Optimization 2. This wizard performs a two-stage performance
optimization. A report is generated in the Write window listing the configuration
options utilized in the optimization as well as their previous and new values. You can
undo the changes made at any time.
The wizard optimizes the following options:
• Output mode and update cycle for the Trace window
• Update cycle for bus statistics
• Trigger option Write full buffer to file (Logging)
• Buffer size for the logging trigger
• Update mode and update cycle for the Data window
• Buffer size and drawing mode for the Graphic window.
The wizard function Help│Performance│Undo cancels the changes of a previous
optimization of configuration options. The operations required for this are also summarized
in a report.
Please note that only those values can be restored which have not been changed in
the configuration dialogs since the optimization.
2.5.5 Configuration Options at High Bus Load
Besides the automatic deactivation function, which CANoe initiates in load situations,
you can manually switch the following analysis blocks to less computing-intensive
modes:
© Vector Informatik GmbH CANoe/DENoe Manual Version 4.1.1
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