How to Output Traces in Unified Trace Solution

This section provides details on outputting traces.

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

Manually or programmatically, set the filter options in the ULogger configuration file.
Select and activate the output plug-in to capture the trace data stream.
Configure the setting for the active plug-in.
Start the ULogger server to generate output.
Run the trace-instrumented component or application.
Stop the ULogger server from tracing.
Ensure that the output log file has been transferred to the host.
Post-process the output log file.

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:

Setting the buffer mode option to straight.
Setting the buffer size option to a valid value.
Setting the data notification size option to a valid value.
Selecting the correct combination of filters, according to the environment and requirement.
Ensuring that either minimal traces are dropped or intrusion is minimised.

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.

How to Output Traces

Preparing the system to output traces

Optimising the trace performance

See also