ULINKpro User's Guide

Trace Events

Trace Events define which events are generated and captured while tracing. View the results through the Event Counters window.

• CPI: Cycles per Instruction enables an event on CPI count overflow (every 256 cycles of multi-cycle instructions). CPI counts extra cycles required for instructions. The first cycle of an instruction and those recorded by the LSU are not counted.
• EXC: Exception Overhead enables an event on Exception Overhead count overflow (every 256 cycles spent in interrupt processing). Examples of these exceptions would be entry stacking, return unstacking, pre-emption.
• SLEEP: Sleep Cycles enables an event on Sleep count overflow (every 256 cycles that the processor is sleeping).
• LSU: Load Store Unit Cycles enables an event on LSU count overflow (every 256 cycles of LSU operations). LSU counts all LSU cycles after the initial cycle for the instruction.
• FOLD: Folded Instructions enables an event on Folded instruction count overflow (every 256 folded instructions). Folded instructions do not require any cycles to execute (e.g. an IT instruction is folded and does not use any cycles).
• EXCTRC: Exception Tracing enables an event on every exception/interrupt entry/exit point.

Note

• When too many data are generated and the Status Bar shows a data overflow message, reduce the generated events here.