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:
Nov. 19, 2013
Filed:
May. 12, 2011
Hiromichi Yamada, Hitachi, JP;
Kotaro Shimamura, Mito, JP;
Nobuyasu Kanekawa, Hitachi, JP;
Yuichi Ishiguro, Kanagawa, JP;
Hiromichi Yamada, Hitachi, JP;
Kotaro Shimamura, Mito, JP;
Nobuyasu Kanekawa, Hitachi, JP;
Yuichi Ishiguro, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
A computer system which shortens standby time of CPUs and improves CPU processing efficiency of a performance mode upon switching from the performance mode (parallel operation) to a safety mode (master/checker operation) is provided. In a computer system including: at least two CPUs; a programmable interrupt controller for interrupting the CPUs; and a comparator for mutually comparing outputs of the CPUs, switching between the performance mode of executing mutually different processes by the CPUs, respectively, to improve performance and the safety mode of executing mutually the same processes by the CPUs and collating results by the comparator to detect failure can be carried out; CPUs to be interrupted can be set for each interrupt factor; and whether the performance mode is to be executed or the safety mode is to be executed can be set for each interrupt factor.