Fault tolerance of data processing steps operating in either a parallel operation mode or a non-synchronous redundant operation mode

US9052887B2 · kind B2 · utility

Assignee

• Freeescale Semiconductor, Inc. · US

Inventors

• Michael Rohleder · Unterschleißheim, DE
• Joachim Fader · Munich, DE
• Frank Lenke · Tauberbischofsheim, DE
• Markus Baumeister · Aachen, DE

Key dates

• Filing date: Feb 16, 2010
• Grant date: Jun 9, 2015
• Expiry date: Aug 5, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2201/845
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A method of processing data in a data processor comprising at least two data processing units. The method comprises performing different data processing steps in the data processing units concurrently during a parallel operation, and replicating performances of selected identical data processing steps in the data processing units during a non-synchronised redundant operation. The non-synchronised redundant operation comprises an initial performance of the selected identical data processing steps in one of the data processing units and a replicate performance of the data processing steps starting later than the initial performance, preferably in another of the data processing units. Initial result data representative of results from the initial performance are registered, and compared with replicate result data representative of results from the replicate performance, and an error signal is produced in case of discrepancy.