CA2435001A1 - Fault-tolerant computer system, re-synchronization method thereof and re-synchronization program thereof - Google Patents

Fault-tolerant computer system, re-synchronization method thereof and re-synchronization program thereof Download PDF

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Publication number
CA2435001A1
CA2435001A1 CA 2435001 CA2435001A CA2435001A1 CA 2435001 A1 CA2435001 A1 CA 2435001A1 CA 2435001 CA2435001 CA 2435001 CA 2435001 A CA2435001 A CA 2435001A CA 2435001 A1 CA2435001 A1 CA 2435001A1
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CA
Canada
Prior art keywords
synchronization
fault
computing module
computer system
tolerant computer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2435001
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French (fr)
Other versions
CA2435001C (en
Inventor
Shigeo Yamazaki
Shigeyuki Aino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
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NEC Corp
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Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of CA2435001A1 publication Critical patent/CA2435001A1/en
Application granted granted Critical
Publication of CA2435001C publication Critical patent/CA2435001C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Hardware Redundancy (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Laser Beam Printer (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

In a lock-step synchronism fault-tolerant computer system including a plurality of computing modules having a processor and a memory in which each computing module processes the same instruction string in synchronization with each other. When detecting disagreement in a state of access to an external bus among the respective processors in each computing module, if no fault is detected in the system including each computing module, processing of resuming operation in synchronization is executed with respect to each computing module after generating an interruption to all the processors to execute delay adjustment for making a state of instruction execution among computing modules be coincident.
CA 2435001 2002-07-12 2003-07-07 Fault-tolerant computer system, re-synchronization method thereof and re-synchronization program thereof Expired - Fee Related CA2435001C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002-204164 2002-07-12
JP2002204164A JP2004045840A (en) 2002-07-12 2002-07-12 Method and device for optical scanning, and image forming device

Publications (2)

Publication Number Publication Date
CA2435001A1 true CA2435001A1 (en) 2004-01-12
CA2435001C CA2435001C (en) 2008-12-23

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Family Applications (1)

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CA 2435001 Expired - Fee Related CA2435001C (en) 2002-07-12 2003-07-07 Fault-tolerant computer system, re-synchronization method thereof and re-synchronization program thereof

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JP (1) JP2004045840A (en)
CA (1) CA2435001C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115167933A (en) * 2022-09-08 2022-10-11 深圳市恒运昌真空技术有限公司 Dual-processor equipment, control method thereof and processor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005292349A (en) * 2004-03-31 2005-10-20 Ricoh Co Ltd Optical scanning device, image forming apparatus and method for driving liquid crystal element
JP4677277B2 (en) * 2005-05-09 2011-04-27 キヤノン株式会社 Optical scanning device and image forming apparatus using the same
JP2007093945A (en) * 2005-09-28 2007-04-12 Brother Ind Ltd Optical coupler and image display apparatus
JP2007114518A (en) * 2005-10-20 2007-05-10 Ricoh Co Ltd Optical scanner, image forming apparatus, and method of correcting vertical scanning position
JP4927486B2 (en) * 2006-09-19 2012-05-09 株式会社リコー Optical scanning apparatus and image forming apparatus
JP4930129B2 (en) * 2007-03-20 2012-05-16 ブラザー工業株式会社 Optical scanning device, optical scanning image display device, and retinal scanning image display device
JP5266798B2 (en) 2008-03-04 2013-08-21 株式会社リコー Optical scanning apparatus and image forming apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115167933A (en) * 2022-09-08 2022-10-11 深圳市恒运昌真空技术有限公司 Dual-processor equipment, control method thereof and processor

Also Published As

Publication number Publication date
JP2004045840A (en) 2004-02-12
CA2435001C (en) 2008-12-23

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