Unisys Corporation

Bruce Alan Vessey

Charles R Caldarale

Hans Christian Mikkelsen

Ted W Hinaman

Douglas E Morrissey

Craig F Russ

James R Hunter

Sharon M Mauer

Maureen P Connell

Robert C Gulick

Michael G Dobbins

Sue Lapin, Legal Representative

Eugene W Troxell

A system and method of emulating network communications between applications executing in different partitions of a partitionable computer system is provided. A connection is established between a first partition and a second partition of a computer system, through a memory region of the computer system shared by both the first partition and the second partition. The connection emulates a network connection. A network message is transmitted from a first application in the first partition using a network application interface and intended for transmission to a second application in the second partition. The network message transmitted by the first application is transmitted to the second application via the connection established through the shared memory region.

System and method for emulating network communications between partitions of a computer system

A computer system comprises a plurality of processing modules that can be configured into different partitions within the computer system, and a main memory. Each partition operates under the control of a separate operating system. At least one shared memory window is defined within the main memory to which multiple partitions have shared access, and each partition may also be assigned an exclusive memory window. Program code executing on different partitions enables those partitions to communicate with each other through the shared memory window. Means are also provided for mapping the physical address space of the processors in each partition to the respective exclusive memory windows assigned to each partition, so that the exclusive memory windows assigned to each partition appear to the respective operating systems executing on those partitions as if they all start at the same base address.

Computer system and method for operating multiple operating systems in different partitions of the computer system and for allowing the different partitions to communicate with one another through shared memory

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Downingtown, PA, United States of America

Bruce Alan Vessey