Correlating trace data streams

Apparatus for processing data comprising:

• processing means for performing processing operations in response to a stream of program instructions;
• tracing means coupled to said processing means for generating trace data indicative of said processing operations performed by said processing circuitry;
• wherein
• said trace data comprises a plurality of separate trace streams including at least one first trace stream and at least one second trace stream and said tracing means is configured to insert a synchronisation marker in one of said at least one second trace stream to mark a synchronisation point which matches a known point in one of said at least one first trace stream;
• wherein, in addition to insertion of said synchronisation marker, said tracing means is configured to mark individual elements within said plurality of separate trace streams with respective key values.

A method of processing data comprising the steps of:

• performing processing operations in response to a stream of program instructions;
• generating trace data indicative of said processing operations performed;
• wherein
• said trace data comprises a plurality of separate trace streams including at least one first trace stream and at least one second trace stream and said step of generating inserts a synchronisation marker in one of said at least one second trace stream to mark a synchronisation point which matches a known point in one of said at least one first trace stream, and
• in addition to inserting of said synchronisation marker, marking individual elements within said plurality of separate trace streams with respective key values.

Apparatus for processing received trace data comprising:

• receiving circuitry configured to receive trace data from a processing apparatus performing processing operations in response to a stream of program instructions;
• and
• analysis circuitry coupled to said receiving circuitry and configured to analyse said trace data;
• wherein
• said trace data comprises a plurality of separate trace streams including at least one first trace stream and at least one second trace stream and said analysis circuitry is configured to identify a synchronisation marker in one of said at least one second trace stream and a known point within one of said at least one first data stream, said synchronisation marker and said known point identifying respective synchronisation points with matching positions within said first trace stream and said at least one second trace stream, and
• in addition to said synchronisation marker, individual elements within plurality of separate trace streams are marked with respective key values.

Apparatus for processing received trace data comprising:

• receiving means for receiving trace data from a processing apparatus performing processing operations in response to a stream of program instructions;
• and
• analysis means coupled to said receiving means for analysing said trace data;
• wherein
• said trace data comprises a plurality of separate trace streams including at least one first trace stream and at least one second trace stream and said analysis means is configured to identify a synchronisation marker in one of said at least one second trace stream and a known point within one of said at least one first data stream, said synchronisation marker and said known point identifying respective synchronisation points with matching positions within said one of said at least one first trace stream and said one of said at least one second trace stream, and
• in addition to said synchronisation marker, individual elements within said plurality of separate trace streams are marked with respective key values.

A method of processing received trace data comprising:

• receiving trace data from a processing apparatus performing processing operations in response to a stream of program instructions;
• and
• analysing said trace data;
• wherein
• said trace data comprises a plurality of separate trace streams including a first trace stream and at least one second trace stream and said step of analysing identifies a synchronisation marker in said at least one second trace stream and a known point within one of said at least one first data stream, said synchronisation marker and said known point identifying respective synchronisation points with matching positions within said one of said at least one first trace stream and one of said at least one second trace stream, and
• in addition to said synchronisation marker, individual elements within said plurality of separate trace streams are marked with respective key values.