US 2004/0107419 A1Published application

Efficient shared memory transport in a distributed data processing environment

AssigneeInternational Business Machines Corporation

InventorsRobert S. Blackmore, Amy Xin Chen, Rama K. Govindaraju, Chulho Kim, Hanhong Xue

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Abstract

A method is provided for sharing and/or transporting data within a single node of a multi-node data processing. The method avoids the necessity of making more than one copy of the data to be shared or transported. The method is tunable based on the size of the data segment involved. A shared memory area between tasks running in different address spaces on the node is used to coordinate the process and for task to task communication. The increase in efficiency provided by the intranodal process described herein also provides advantages to the internodal communication process since more CPU cycles are available for that aspect of system operation.

Claims3

Dependent claims

A method for sharing data between tasks in a distributed data processing system, said method comprising the steps of:

acquiring, by a first task, from said data processing system, control information relating to data contained within an address space of said first task;
transferring said control information to an area of memory shared by said first task and a second task;
transferring said control information from said shared memory area to said second task which has its own address space;
extending the address space of said second task, based on said control information, so as to associate it with said data in said first task's address space;
and
copying said data from the address space of said first task to the address space of said second task.

3 more elements

Dependencies are inferred from the claim text.