| 摘要 |
A data processing apparatus and method are provided for generating a trace stream. The data processing apparatus comprises logic for producing data elements, and trace logic for producing a stream of trace elements representative of at least some of the data elements. The trace logic has trace generation logic operable to generate trace elements for inclusion in the stream, and is further arranged to generate trace timing indicators for inclusion in the stream. Each trace timing indicator indicates the elapse of one or more processing timing intervals, the processing timing interval being a predetermined plurality of clock cycles. The apparatus further comprises storage for retaining the current processing interval and the generation logic references the storage in order to determine when to generate each trace timing indicator. The processing time interval is configurable and can be altered in response to an occurrence of an event. When the interval is changed the trace generation logic includes a timing change indicator in the trace stream. The timing indicator may be suppressed in the stream when no event of interest occurs. |
