Debug trace stream timestamping using downstream correlation

摘要

A method of correlating the timing of multiple interleaved trace data streams. A Time Stamp Trace stream logic monitors the event trace stream for a synchronization point. When a synchronization point is detected a time stamp value is inserted into the trace stream along with any relevant identification markers available in the detected synchronization point.

主权项

1. A trace timing correlation apparatus comprising:
a trace capture unit including
at least one first-in-first-out buffer receiving a corresponding trace event data stream and a corresponding local timing data stream, the trace data stream including periodic sync points with corresponding source identification information giving points to begin interpretation of trace data of the trace data stream, and a timestamp trace stream logic operable to
monitor each received trace event data stream for the presence of a sync point,upon detection of a sync point insert a time stamp value into the corresponding local timing data stream, andupon inserting the time stamp value into the corresponding local timing data stream inserting corresponding source identification information present in the sync point into the corresponding local timing data stream.