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Title: Method and apparatus for fast context cloning in a data processing system

Abstract

A data processing system includes a memory system, a first processing element, a first address translator that maps virtual addresses to system addresses, a second address translator that maps system address to physical addresses, and a task management unit. A first program task uses a first virtual memory space that is mapped to a first system address range using a first table. The context of the first program task includes an address of the first table and is cloned by creating a second table indicative of a mapping from a second virtual address space to a second range of system addresses, where the second range is mapped to the same physical addresses as the first range until a write occurs, at which time memory is allocated and the mapping of the second range is updated. The cloned context includes an address of the second table.

Inventors:
; ;
Issue Date:
Research Org.:
Arm Ltd., Cambridge (United Kingdom)
Sponsoring Org.:
USDOE
OSTI Identifier:
1568609
Patent Number(s):
10353826
Application Number:
15/649,976
Assignee:
Arm Limited (Cambridge, GB)
Patent Classifications (CPCs):
G - PHYSICS G06 - COMPUTING G06F - ELECTRIC DIGITAL DATA PROCESSING
Resource Type:
Patent
Resource Relation:
Patent File Date: 07/14/2017
Country of Publication:
United States
Language:
English

Citation Formats

Beard, Jonathan Curtis, Rusitoru, Roxana, and Dunham, Curtis Glenn. Method and apparatus for fast context cloning in a data processing system. United States: N. p., 2019. Web.
Beard, Jonathan Curtis, Rusitoru, Roxana, & Dunham, Curtis Glenn. Method and apparatus for fast context cloning in a data processing system. United States.
Beard, Jonathan Curtis, Rusitoru, Roxana, and Dunham, Curtis Glenn. Tue . "Method and apparatus for fast context cloning in a data processing system". United States. https://www.osti.gov/servlets/purl/1568609.
@article{osti_1568609,
title = {Method and apparatus for fast context cloning in a data processing system},
author = {Beard, Jonathan Curtis and Rusitoru, Roxana and Dunham, Curtis Glenn},
abstractNote = {A data processing system includes a memory system, a first processing element, a first address translator that maps virtual addresses to system addresses, a second address translator that maps system address to physical addresses, and a task management unit. A first program task uses a first virtual memory space that is mapped to a first system address range using a first table. The context of the first program task includes an address of the first table and is cloned by creating a second table indicative of a mapping from a second virtual address space to a second range of system addresses, where the second range is mapped to the same physical addresses as the first range until a write occurs, at which time memory is allocated and the mapping of the second range is updated. The cloned context includes an address of the second table.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}

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