Non-Intrusive Profiling - 2024.2 English

With extended debugging, non-intrusive profiling is provided, which uses a Profiling Buffer to store program execution statistics. The size of the profiling buffer can be configured from 4 KB to 128 KB using the parameter C_DEBUG_PROFILE_SIZE. By setting C_DEBUG_PROFILE_SIZE to 0 (None), non-intrusive profiling is disabled.

The Profiling Buffer is divided into a number of bins, each counting the number of executed instructions or clock cycles within a certain address range. Each bin counts up to 2³⁶ - 1 = 68719476735 instructions or cycles.

The address range of each bin is determined by the buffer size and the profiled address range defined using the Profiling Low Address Register and Profiling High Address Register.

Profiling can be started or stopped using the Profiling Control Register or by cross trigger events (see Cross Trigger Support).

The debug registers used to configure and control profiling, and to read or write the Profiling Buffer, are listed in the following table.

The DBG_CTRL value indicates the value to use in the MDM Debug Register Access Control Register to access the register, used with MDM software access to debug registers.