Debug trace stream timestamping using upstream 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 request. When a synchronization request, a CTI trigger or both are detected the EEP ID is incremented and the time stamp value is inserted into the trace stream along with the EEP ID and any relevant identification markers available in the detected synchronization request.

主权项

1. A method of trace timing correlation comprising the steps of:
receiving a trace data source stream from a local trace data source comprising a trace event data stream and a local timing data stream; creating a point of correlation; upon creating the point of correlation, incrementing an External Event Profiling (EEP) timestamp ID; upon creating the point of correlation, communicating the incremented EEP timestamp ID to the local trace data source; upon receiving the incremented EEP timestamp ID, inserting at the local trace data source a local timing signal and the incremented EEP timestamp ID; and transmitting data corresponding to the trace data source stream including the trace event stream and the local timing data stream including the incremented EEP timestamp ID to an external recorder via a trace port.