Title:
マルチプロセッサシステム及びマルチプロセッサシステムの動作方法
Document Type and Number:
Japanese Patent JP2004534323
Kind Code:
A
Abstract:
A data processing apparatus according to the invention comprises at least a first (1.2) and a second processor (1.3), which processors are capable of communicating data to each other by exchanging tokens via a buffer according to a synchronization protocol. The protocol maintains synchronization information comprising at least a first and a second synchronization counter (writec, readc), which are readable by both processors. At least the first processor (1.2) is capable of modifying the first counter (writec), and at least the second processor (1.3) is capable of modifying the second counter (readc). The protocol comprises at least a first command (claim) which when issued by a processor results in a verification whether a requested number of tokens is available to said processor, and a second command (release) which results in updating one of the synchronization counters to indicate that tokens are released for use by the other processor. At least one of the processors (1.3) comprises a storage facility for locally storing an indication (Nc; writec', readc) of the amount of tokens available to that processor, wherein issuing the first command (claim) results in a verification of the number of tokens available to said processor on the basis of said indication. A negative outcome of the verification results in updating of this indication on the basis of at least one of the synchronization counters. Issuing the second command (release) by a processor results in updating the indication in accordance with the number of tokens released to the other processor.
Inventors:
I-Qi, Kang
Homme, Pee.
Andre, Kay Newland
Homme, Pee.
Andre, Kay Newland
Application Number:
JP2003511119A
Publication Date:
November 11, 2004
Filing Date:
June 20, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G06F9/38; G06F9/46; G06F9/52; G06F15/16; G06F15/177; H04L7/00; (IPC1-7): G06F15/173
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Jun Okazawa
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Jun Okazawa