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SYMBIAN OS V9.4

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How to Output Traces

This section provides details on outputting traces.

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Preparing the system to output traces

Before starting the device, the Trace Collector has to perform the following tasks to obtain trace information:

  1. Manually or programmatically, set the filter options in the ULogger configuration file.

  2. Select and activate the output plug-in to capture the trace data stream.

  3. Configure the setting for the active plug-in.

  4. Start the ULogger server to generate output.

  5. Run the trace-instrumented component or application.

  6. Stop the ULogger server from tracing.

  7. Ensure that the output log file has been transferred to the host.

  8. Post-process the output log file.

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Optimising the trace performance

The Trace Collector can optimise tracing performance by setting the configuration options in the uloggerconfig.ini configuration file. The optimisation is based on the following settings:

For recommended configuration settings and details, see Recommended settings for ULogger configuration file.

There is a reference default uloggerconfig.ini configuration file shipped with the ULogger engine that provides default settings allowing a Trace Collector, who is new to trace, to easily start obtaining trace. For details, see ULogger command syntax.

See also