Electrical computers and digital processing systems: multicomput – Computer-to-computer direct memory accessing
Reexamination Certificate
2006-08-08
2006-08-08
Jaroenchonwant, Bunjob (Department: 2153)
Electrical computers and digital processing systems: multicomput
Computer-to-computer direct memory accessing
C709S216000, C709S250000, C710S022000
Reexamination Certificate
active
07089289
ABSTRACT:
An efficient mechanism for sending messages without the use of intermediate copies (i.e. without the staging of data) is provided. In particular an interface specification which allows use users of a transport protocol is defined so as to lend itself to efficient implementations. The interface specification is a complete and robust set of user functions usable within systems desiring reliable and efficient zero copy transport protocols. Two methods are provided to accomplish the implementation of an efficient zero copy protocol. The first method is especially useful in systems where the network device has limited capabilities in terms of hardware, message fragmentation and message reassembly. An additional RDRAM memory allows data to reside in an adapter while handshake operations take place between an adapter and a node so as to specify the final destination of the data. The second method takes advantage of network devices with advanced features which are exploited for maximum efficiency.
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Blackmore Robert S.
Gildea Kevin J.
Govindaraju Rama K.
Shah Gautam H.
Cutter, Esq. Lawrence D.
Heslin Rothenberg Farley & & Mesiti P.C.
International Business Machines - Corporation
Jaroenchonwant Bunjob
Monteleone, Esq. Geraldine D.
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