WO1999029071A1 - Partage de ressources - Google Patents

Partage de ressources Download PDF

Info

Publication number
WO1999029071A1
WO1999029071A1 PCT/GB1998/003575 GB9803575W WO9929071A1 WO 1999029071 A1 WO1999029071 A1 WO 1999029071A1 GB 9803575 W GB9803575 W GB 9803575W WO 9929071 A1 WO9929071 A1 WO 9929071A1
Authority
WO
WIPO (PCT)
Prior art keywords
access
ports
buffer memory
transmit
communications
Prior art date
Application number
PCT/GB1998/003575
Other languages
English (en)
Inventor
Ciaran Murphy
Neil Clifford
Jerome Nolan
Mick Gleeson
Original Assignee
3Com Technologies
Butcher, Ian, James
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 3Com Technologies, Butcher, Ian, James filed Critical 3Com Technologies
Priority to GB0011248A priority Critical patent/GB2347331A/en
Publication of WO1999029071A1 publication Critical patent/WO1999029071A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/35—Switches specially adapted for specific applications
    • H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/10—Packet switching elements characterised by the switching fabric construction
    • H04L49/103—Packet switching elements characterised by the switching fabric construction using a shared central buffer; using a shared memory

Definitions

  • a communication device which forms part of the structure of the network has, as mentioned above, a possibly large plurality of ports. There will be a MAC provided for each of these ports to enable proper interfacing on the network.
  • a typical transmit MAC has a front end, via which communications for transmission onto the network are received, and a back end, via which the communications are transmitted to the network. Between the front end and the back end there is typically provided a buffer memory in which the communications are temporarily stored.
  • efficient access to a shared resource such as buffer memory by a number of users is achieved by providing a single access control device which is supplied with parameters appropriate to the user having access to the resource at the relevant time.
  • a single access control device which is supplied with parameters appropriate to the user having access to the resource at the relevant time.
  • appropriate pointers related to the users are supplied to a calculation means during access to the buffer by the various users.
  • each MAC device on chip 10 has associated with it a specific portion of SRAM 40 in which front end portion 20 can store a received communication until back end portion 30 is ready to transmit it to the network.
  • Access to SRAM 40 is controlled by SRAM arbiter 44 and is via multiplexer 42. The control of shared access to a memory resource is well known and will not be described in detail here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

Selon cette invention, un nombre d'utilisateurs peuvent accéder de manière efficace à une ressource partagée telle qu'une mémoire tampon au moyen d'un dispositif de commande d'accès unique qui est alimenté en paramètres appropriés à l'utilisateur ayant accès à la ressource au moment donné. Notamment, dans un dispositif de communication réseau dans lequel des dispositifs MAC (contrôleurs d'accès au support) ont une mémoire tampon commune, des pointeurs appropriés reliés aux utilisateurs sont fournis à un système de calcul lors de l'accès au tampon par divers utilisateurs.
PCT/GB1998/003575 1997-11-28 1998-11-30 Partage de ressources WO1999029071A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0011248A GB2347331A (en) 1997-11-28 1998-11-30 Resource sharing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9725368A GB9725368D0 (en) 1997-11-28 1997-11-28 Resource sharing
GB9725368.6 1997-11-28

Publications (1)

Publication Number Publication Date
WO1999029071A1 true WO1999029071A1 (fr) 1999-06-10

Family

ID=10822906

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/003575 WO1999029071A1 (fr) 1997-11-28 1998-11-30 Partage de ressources

Country Status (2)

Country Link
GB (2) GB9725368D0 (fr)
WO (1) WO1999029071A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7664909B2 (en) 2003-04-18 2010-02-16 Nextio, Inc. Method and apparatus for a shared I/O serial ATA controller
US7698483B2 (en) 2003-01-21 2010-04-13 Nextio, Inc. Switching apparatus and method for link initialization in a shared I/O environment
US7706372B2 (en) 2003-01-21 2010-04-27 Nextio Inc. Method and apparatus for shared I/O in a load/store fabric
US7782893B2 (en) 2003-01-21 2010-08-24 Nextio Inc. Method and apparatus for shared I/O in a load/store fabric
US7917658B2 (en) 2003-01-21 2011-03-29 Emulex Design And Manufacturing Corporation Switching apparatus and method for link initialization in a shared I/O environment
US7953074B2 (en) 2003-01-21 2011-05-31 Emulex Design And Manufacturing Corporation Apparatus and method for port polarity initialization in a shared I/O device
US8032659B2 (en) 2003-01-21 2011-10-04 Nextio Inc. Method and apparatus for a shared I/O network interface controller
US8102843B2 (en) 2003-01-21 2012-01-24 Emulex Design And Manufacturing Corporation Switching apparatus and method for providing shared I/O within a load-store fabric
US8346884B2 (en) 2003-01-21 2013-01-01 Nextio Inc. Method and apparatus for a shared I/O network interface controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633865A (en) * 1995-03-31 1997-05-27 Netvantage Apparatus for selectively transferring data packets between local area networks
WO1997031461A1 (fr) * 1996-02-23 1997-08-28 Zeitnet, Inc. Commutateur numerique grande vitesse pour commutation de paquets et procede correspondant
EP0854608A2 (fr) * 1996-12-30 1998-07-22 Compaq Computer Corporation Commutateur de réseau avec système de mémoire partagé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633865A (en) * 1995-03-31 1997-05-27 Netvantage Apparatus for selectively transferring data packets between local area networks
WO1997031461A1 (fr) * 1996-02-23 1997-08-28 Zeitnet, Inc. Commutateur numerique grande vitesse pour commutation de paquets et procede correspondant
EP0854608A2 (fr) * 1996-12-30 1998-07-22 Compaq Computer Corporation Commutateur de réseau avec système de mémoire partagé

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7698483B2 (en) 2003-01-21 2010-04-13 Nextio, Inc. Switching apparatus and method for link initialization in a shared I/O environment
US7706372B2 (en) 2003-01-21 2010-04-27 Nextio Inc. Method and apparatus for shared I/O in a load/store fabric
US7782893B2 (en) 2003-01-21 2010-08-24 Nextio Inc. Method and apparatus for shared I/O in a load/store fabric
US7917658B2 (en) 2003-01-21 2011-03-29 Emulex Design And Manufacturing Corporation Switching apparatus and method for link initialization in a shared I/O environment
US7953074B2 (en) 2003-01-21 2011-05-31 Emulex Design And Manufacturing Corporation Apparatus and method for port polarity initialization in a shared I/O device
US8032659B2 (en) 2003-01-21 2011-10-04 Nextio Inc. Method and apparatus for a shared I/O network interface controller
US8102843B2 (en) 2003-01-21 2012-01-24 Emulex Design And Manufacturing Corporation Switching apparatus and method for providing shared I/O within a load-store fabric
US8346884B2 (en) 2003-01-21 2013-01-01 Nextio Inc. Method and apparatus for a shared I/O network interface controller
US8913615B2 (en) 2003-01-21 2014-12-16 Mellanox Technologies Ltd. Method and apparatus for a shared I/O network interface controller
US9015350B2 (en) 2003-01-21 2015-04-21 Mellanox Technologies Ltd. Method and apparatus for a shared I/O network interface controller
US9106487B2 (en) 2003-01-21 2015-08-11 Mellanox Technologies Ltd. Method and apparatus for a shared I/O network interface controller
US7664909B2 (en) 2003-04-18 2010-02-16 Nextio, Inc. Method and apparatus for a shared I/O serial ATA controller

Also Published As

Publication number Publication date
GB9725368D0 (en) 1998-01-28
GB0011248D0 (en) 2000-06-28
GB2347331A (en) 2000-08-30

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