AUTOSAR mechanism for standardized logging and tracing in the vehicle.

DLT stands for Diagnostic Log and Trace and refers to a standardized logging/tracing concept used primarily in the AUTOSAR environment for ECU-internal log messages. A DLT daemon collects messages from applications or software modules, buffers them, and makes them available to clients or viewers for analysis. For data logging, DLT is relevant when internal software and diagnostic messages from an ECU are to be captured in addition to bus and sensor data.