On-demand GPR ECC error detection and scrubbing for a multi-slice microprocessor

US10489253B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Steven J. Battle · Austin, US
• Joshua W. Bowman · Austin, US
• Sundeep Chadha · Austin, US
• Dhivya Jeganathan · Austin, US
• Cliff Kucharski · Austin, US
• Dung Q. Nguyen · Austin, US
• Tu-An T. Nguyen · Austin, US
• David R. Terry · Austin, US

Key dates

• Filing date: May 16, 2017
• Grant date: Nov 26, 2019
• Expiry date: Mar 1, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F11/0724
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Embodiments include systems, methods, and computer program products for on-demand error detection and correction of registers in a processor. One method includes detecting, before a first instruction is dispatched to an issue queue in the processor, an error in data, associated with the first instruction, stored in an entry of a register file in the processor. The method also includes, after detecting the error, halting the dispatch of the first instruction to the issue queue, and determining whether the entry of the register file has completed. The method further includes determining whether to perform error correction on the register file based on the determination of whether the entry of the register file has completed.