JPS57137949A - Error recovery system of logical device - Google Patents

Error recovery system of logical device

Info

Publication number
JPS57137949A
JPS57137949A JP56022553A JP2255381A JPS57137949A JP S57137949 A JPS57137949 A JP S57137949A JP 56022553 A JP56022553 A JP 56022553A JP 2255381 A JP2255381 A JP 2255381A JP S57137949 A JPS57137949 A JP S57137949A
Authority
JP
Japan
Prior art keywords
instruction
cpu10
executed
stand
cpu20
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
JP56022553A
Other languages
Japanese (ja)
Other versions
JPS6128141B2 (en
Inventor
Katsuichi Tomita
Koji Kimijima
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
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56022553A priority Critical patent/JPS57137949A/en
Publication of JPS57137949A publication Critical patent/JPS57137949A/en
Publication of JPS6128141B2 publication Critical patent/JPS6128141B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Retry When Errors Occur (AREA)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE:To recover a fixed fault, by processing by use of a CPU having no error succeedingly, the processing which has been executed by a faulty CPU, at each instruction unit. CONSTITUTION:When an instruction is executed in a CPU10, information of a program controllable register group 130 before executing the instruction is waited in a stand-by register group 140 whenever one instruction is executed. A retry controlling circuit 260 for the CPU10 on a CPU20 monitors whether retry is executed or not at every instruction. When it is informed to the CPU10 from the retry controlling circut 260 that a recovery impossible error has been detected, an execution controlling circuit 210 of the CPU20 generates an instruction, and informs the control program of a recovery request of the CPU10. The control program halts the processing which is being executed, and executes its transfer. An inter-register shift controlling circuit 270 shift the information to the stand-by register group 240 of the CPU20 from the stand-by regiter group 140 of the CPU10.
JP56022553A 1981-02-18 1981-02-18 Error recovery system of logical device Granted JPS57137949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56022553A JPS57137949A (en) 1981-02-18 1981-02-18 Error recovery system of logical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56022553A JPS57137949A (en) 1981-02-18 1981-02-18 Error recovery system of logical device

Publications (2)

Publication Number Publication Date
JPS57137949A true JPS57137949A (en) 1982-08-25
JPS6128141B2 JPS6128141B2 (en) 1986-06-28

Family

ID=12086030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56022553A Granted JPS57137949A (en) 1981-02-18 1981-02-18 Error recovery system of logical device

Country Status (1)

Country Link
JP (1) JPS57137949A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6341943A (en) * 1986-08-08 1988-02-23 Nec Corp Error restoring system for logic unit
JPH04213736A (en) * 1990-02-08 1992-08-04 Internatl Business Mach Corp <Ibm> Check point mechanism for fault tolerant system
JPH06236289A (en) * 1993-02-08 1994-08-23 Kofu Nippon Denki Kk Information processor
JPH08329026A (en) * 1995-06-05 1996-12-13 Nec Corp Dual processor system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6341943A (en) * 1986-08-08 1988-02-23 Nec Corp Error restoring system for logic unit
JPH04213736A (en) * 1990-02-08 1992-08-04 Internatl Business Mach Corp <Ibm> Check point mechanism for fault tolerant system
JPH06236289A (en) * 1993-02-08 1994-08-23 Kofu Nippon Denki Kk Information processor
JPH08329026A (en) * 1995-06-05 1996-12-13 Nec Corp Dual processor system

Also Published As

Publication number Publication date
JPS6128141B2 (en) 1986-06-28

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