CA2145553A1 - Multi-Processor System Including Priority Arbitrator for Arbitrating Request Issued from Processors - Google Patents

Multi-Processor System Including Priority Arbitrator for Arbitrating Request Issued from Processors

Info

Publication number
CA2145553A1
CA2145553A1 CA2145553A CA2145553A CA2145553A1 CA 2145553 A1 CA2145553 A1 CA 2145553A1 CA 2145553 A CA2145553 A CA 2145553A CA 2145553 A CA2145553 A CA 2145553A CA 2145553 A1 CA2145553 A1 CA 2145553A1
Authority
CA
Canada
Prior art keywords
request
processor system
processors
held
arbitrating
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
CA2145553A
Other languages
French (fr)
Other versions
CA2145553C (en
Inventor
Yuuki Date
Masanobu Inaba
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
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 filed Critical NEC Corp
Publication of CA2145553A1 publication Critical patent/CA2145553A1/en
Application granted granted Critical
Publication of CA2145553C publication Critical patent/CA2145553C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/36—Handling requests for interconnection or transfer for access to common bus or bus system
    • G06F13/368—Handling requests for interconnection or transfer for access to common bus or bus system with decentralised access control
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
    • G06F15/163—Interprocessor communication
    • G06F15/17—Interprocessor communication using an input/output type connection, e.g. channel, I/O port

Abstract

In a multi-processor system, a priority arbitrator receives a request issued from each processor of the system, and arbitrates conflicts that occur among the requests. The requests derived from the respective processors are inputted via selectors to fixed priority arbitrating circuits. Only one request is selected by each fixed priority arbitrating circuit, and the selected request is held in an output register. The pending request is detected by an AND circuit, and the detection result is held in a pending register. When there is such a request held in the pending register, the subsequent request is not selected by the selector.
The priorities of the plural fixed priority arbitrating circuits within the multi-processor system may be made different from each other, depending upon the use conditions of the multi-processor system.
CA002145553A 1994-03-30 1995-03-27 Multi-processor system including priority arbitrator for arbitrating request issued from processors Expired - Fee Related CA2145553C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59696/1994 1994-03-30
JP5969694 1994-03-30

Publications (2)

Publication Number Publication Date
CA2145553A1 true CA2145553A1 (en) 1995-10-01
CA2145553C CA2145553C (en) 1999-12-21

Family

ID=13120638

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002145553A Expired - Fee Related CA2145553C (en) 1994-03-30 1995-03-27 Multi-processor system including priority arbitrator for arbitrating request issued from processors

Country Status (5)

Country Link
US (1) US5692136A (en)
EP (1) EP0675446B1 (en)
BR (1) BR9501308A (en)
CA (1) CA2145553C (en)
DE (1) DE69519486T2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5887146A (en) * 1995-08-14 1999-03-23 Data General Corporation Symmetric multiprocessing computer with non-uniform memory access architecture
JP3667585B2 (en) * 2000-02-23 2005-07-06 エヌイーシーコンピュータテクノ株式会社 Distributed memory type parallel computer and its data transfer completion confirmation method
US7120714B2 (en) * 2003-05-27 2006-10-10 Intel Corporation High-speed starvation-free arbiter system, rotating-priority arbiter, and two stage arbitration method
JP2005092780A (en) * 2003-09-19 2005-04-07 Matsushita Electric Ind Co Ltd Real time processor system and control method
US7788466B2 (en) * 2003-09-19 2010-08-31 Nxp B.V. Integrated circuit with a plurality of communicating digital signal processors
US20060026329A1 (en) * 2004-07-30 2006-02-02 Yu James K System and method for an arbiter rewind
US7890686B2 (en) * 2005-10-17 2011-02-15 Src Computers, Inc. Dynamic priority conflict resolution in a multi-processor computer system having shared resources

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543242A (en) * 1967-07-07 1970-11-24 Ibm Multiple level priority system
US3921145A (en) * 1973-10-12 1975-11-18 Burroughs Corp Multirequest grouping computer interface
US4090238A (en) * 1976-10-04 1978-05-16 Rca Corporation Priority vectored interrupt using direct memory access
US4334288A (en) * 1979-06-18 1982-06-08 Booher Robert K Priority determining network having user arbitration circuits coupled to a multi-line bus
US4449183A (en) * 1979-07-09 1984-05-15 Digital Equipment Corporation Arbitration scheme for a multiported shared functional device for use in multiprocessing systems
US4514728A (en) * 1980-02-25 1985-04-30 At&T Bell Laboratories Store group bus allocation system
US4554628A (en) * 1981-08-17 1985-11-19 Burroughs Corporation System in which multiple devices have a circuit that bids with a fixed priority, stores all losing bids if its bid wins, and doesn't bid again until all stored bids win
US4473880A (en) * 1982-01-26 1984-09-25 Intel Corporation Arbitration means for controlling access to a bus shared by a number of modules
US4627018A (en) * 1983-09-08 1986-12-02 Sperry Corporation Priority requestor accelerator
US4941086A (en) * 1984-02-02 1990-07-10 International Business Machines Corporation Program controlled bus arbitration for a distributed array processing system
US4835672A (en) * 1984-04-02 1989-05-30 Unisys Corporation Access lock apparatus for use with a high performance storage unit of a digital data processing system
US4964034A (en) * 1984-10-30 1990-10-16 Raytheon Company Synchronized processing system with bus arbiter which samples and stores bus request signals and synchronizes bus grant signals according to clock signals
US5051946A (en) * 1986-07-03 1991-09-24 Unisys Corporation Integrated scannable rotational priority network apparatus
US5038274A (en) * 1987-11-23 1991-08-06 Digital Equipment Corporation Interrupt servicing and command acknowledgement system using distributed arbitration apparatus and shared bus
US4991084A (en) * 1988-02-05 1991-02-05 International Business Machines Corporation N×M round robin order arbitrating switching matrix system
US4924380A (en) * 1988-06-20 1990-05-08 Modular Computer Systems, Inc. (Florida Corporation) Dual rotating priority arbitration method for a multiprocessor memory bus
US4953081A (en) * 1988-12-21 1990-08-28 International Business Machines Corporation Least recently used arbiter with programmable high priority mode and performance monitor
US5274822A (en) * 1990-07-02 1993-12-28 Ncr Corporation Fast centralized arbitrator
EP0464237A1 (en) * 1990-07-03 1992-01-08 International Business Machines Corporation Bus arbitration scheme
US5280591A (en) * 1991-07-22 1994-01-18 International Business Machines, Corporation Centralized backplane bus arbiter for multiprocessor systems
US5341052A (en) * 1991-12-04 1994-08-23 North American Philips Corporation Arbiter with test capability and associated testing method
US5371893A (en) * 1991-12-27 1994-12-06 International Business Machines Corporation Look-ahead priority arbitration system and method
US5274785A (en) * 1992-01-15 1993-12-28 Alcatel Network Systems, Inc. Round robin arbiter circuit apparatus

Also Published As

Publication number Publication date
CA2145553C (en) 1999-12-21
DE69519486T2 (en) 2001-06-21
US5692136A (en) 1997-11-25
EP0675446A1 (en) 1995-10-04
DE69519486D1 (en) 2001-01-04
EP0675446B1 (en) 2000-11-29
BR9501308A (en) 1995-11-07

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