Context switching device

Details Context switching device Context switching device

2006-10-04

2010-10-26

Kindred, Alford W (Department: 2181)

Electrical computers and digital processing systems: processing

Processing control

C712S228000

Reexamination Certificate

active

07822952

ABSTRACT:
Provided is a context switching device capable of reducing conflicts among accesses due to retrieving and saving of contexts by plural processors.The context switching device has: a transfer unit which transfers context data, according to one of (i) the first transfer mode in which the context data is transferred continuously through cycles by a processor, and (ii) the second transfer mode in which plural pieces of the context data are transferred alternately per cycle by switching respective processors of the context data; and a control unit which (i) decides the processor to be used in the first transfer mode and the processors to be used in the second transfer mode, when there is a conflict in requests of the processors for switching context data, the number of processors being more than M, and (ii) controls the transfer unit based on the decision.

REFERENCES:
patent: 4974143 (1990-11-01), Yamada
patent: 6981083 (2005-12-01), Arimilli et al.
patent: 2003/0149864 (2003-08-01), Furukawa et al.
patent: 2006/0004992 (2006-01-01), Fujisawa et al.
patent: 1-3739 (1989-01-01), None
patent: 9-288585 (1997-11-01), None
patent: 2002-268942 (2002-09-01), None
patent: 2002-312302 (2002-10-01), None
patent: 2003-271399 (2003-06-01), None
English language Abstract of JP 2003-271399.
English language Abstract of JP 1-3739, Jan. 9, 1989.
English language Abstract of JP 2002-268942, Sep. 20, 2002.
English language Abstract of JP 2002-312302, Oct. 25, 2002.
English language Abstract of JP 9-288585, Nov. 4, 1997.

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