The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2014
Filed:
Oct. 12, 2010
Charles S. Cardinell, Tucson, AZ (US);
Roger G. Hathorn, Tucson, AZ (US);
Bernhard Laubli, Tucson, AZ (US);
Timothy J. Van Patten, Tucson, AZ (US);
Charles S. Cardinell, Tucson, AZ (US);
Roger G. Hathorn, Tucson, AZ (US);
Bernhard Laubli, Tucson, AZ (US);
Timothy J. Van Patten, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An approach to detecting processor failure in a multi-processor environment is disclosed. The approach may include having each CPU in the system responsible for monitoring another CPU in the system. A CPUreads a timestampcreated by CPUwhich CPUis monitoring from a shared memory location. The CPUreads its own timestampand compares the two timestamps to calculate a delta value. If the delta value is above a threshold, the CPUdetermines that CPUhas failed and initiates error handling for the CPUs in the system. One CPU may be designated a master CPU, and be responsible for beginning the error handling process. In such embodiments, the CPUmay initiate error handling by notifying the master CPU that CPUhas failed. If CPUis the master CPU, the CPUmay take additional steps to initiate error handling, and may broadcast a non-critical interrupt to all CPUs, triggering error handling.