Meaning
Interface specification for processor execution monitoring is based on the IEEE ISTO 5001 standard. Implementing risc v nexus trace allows a debugger to capture a compressed stream of program flow and data access from a compatible processor. This data is used to find software errors in complex multi-core environments.
Packet Protocol
Compressed messages are sent over a dedicated bus to minimize the number of pins required on the chip. Risc v nexus trace uses packets to report branch targets and memory addresses rather than streaming every instruction. This approach allows a high volume of data to be captured using a relatively small physical connector.
Hardware Support
Silicon designers must include a trace encoder and a physical interface to support these features. The risc v nexus trace standard defines how these components interact with the processor core to collect data. Most modern development tools include support for decoding these packets into a human readable format.
Analysis Capability
Reconstructing the program flow from the packets allows for the identification of infrequent bugs. By using risc v nexus trace, an engineer can see the state of the system exactly as it was before a crash. This level of detail is necessary for safety critical certifications.
