ULINK2 User's Guide

Trace Events

The section Trace Events enables tracing special events.

CPI: Cycles per Instruction triggers events on CPI count overflow (every 256 cycles of multi-cycle instructions). CPI counts extra cycles used by instructions. The first cycle of an instruction and those recorded by the LSU are not counted.

EXC: Exception Overhead triggers events on Exception Overhead count overflow (every 256 cycles spent in interrupt processing). For example, entry stacking, return unstacking, pre-emption.

SLEEP: Sleep Cycles triggers events on Sleep count overflow (every 256 cycles that the processor is sleeping).

LSU: Load Store Unit Cycles triggers events on LSU count overflow (every 256 cycles of LSU operations). LSU counts all LSU cycles after the initial cycle of an instruction.

FOLD: Folded Instructions triggers events on Folded instruction count overflow (every 256 folded instructions). Folded instructions do not require any cycles to execute (for example, an IT instruction is folded and does not use any cycles).

EXCTRC: Exception Tracing triggers events on exceptions, interrupt entries, and interrupt exits.