Circuits, systems, apparatus and processes for monitoring activity in multi-processing systems

Abstract

An electronic circuit includes a first processor () operable to perform processing operations, a first trace buffer () coupled to the first processor (), a first triggering circuit () coupled to the first processor (), the first triggering circuit () operable to detect a specified sequence of particular processing operations in the first processor (); a second processor (), a second trace buffer () coupled to the second processor (), a second triggering circuit () coupled to the second processor (), the second triggering circuit () operable to detect at least one other processing operation in the second processor (); and a cross trace circuit () having a trace output and having inputs coupled to the first triggering circuit () and to the second triggering circuit (), the cross trace circuit () configurably operable to respond to a sequence including both a detection of the sequence of particular processing operations of the first processor () by the first triggering circuit () and a detection of the at least one other processing operation of the second processor () by the second triggering circuit (), to couple at least one of the first trace buffer () and the second trace buffer () to the trace output. Various circuits, devices, telecommunications products, wireless handsets, systems and processes of operation and manufacture are disclosed.