An object-based processor cache.

Russell, Gordon and Shaw, Paul (1993) An object-based processor cache. Technical Report. University of Strathclyde.

Available under License Creative Commons Attribution Non-commercial.

Download (72kB)


In the past, many persistent object-oriented architecture designs have been based on traditional processor technologies. Such architectures invariantly attempt to insert an object-level abstraction mechanism over the traditional processorÕs virtual addressing scheme; this results in an architecture which incurs a translation overhead on every object access. Other architectures use objects at the instruction level, but then use a virtual -based caching scheme. This may require bounds-checking, and even object-to-virtual translation, to be performed on every object access. A new architecture, DAIS, is proposed which utilizes objects in instructions and in the caches. This paper presents a short history of persistence, analyses a number of persistent architectures, and presents the DAIS design strategy. The object-based caching mechanism of DAIS is described, involving topics such as object protection via tag bits, object- and page-based locking, range checking, object to virtual mapping function, and use of a secondary descriptor cache. The cache design results in a processor which is no slower than conventional processors based on virtual memory. The design is then extensively analysed for performance with differing cache sizes. This analysis indicates that using a secondary descriptor cache can increase performance by 21% over a system with instruction and data caches alone.

Item Type: Monograph (Technical Report)
Additional Information: RR-93-103 (formally ARCH-12-93)
Uncontrolled Keywords: persistent object-oriented architecture; virtual addressing scheme; virtual -based caching scheme; DAIS;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Computing
Dewey Decimal Subjects: 000 Computer science, information & general works > 000 Computer science, knowledge & systems > 005 Computer programming, programs & data
Library of Congress Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Item ID: 3187
Depositing User: Computing Research
Date Deposited: 27 Aug 2010 10:58
Last Modified: 12 Jan 2011 04:52

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics

Edinburgh Napier University is a registered Scottish charity. Registration number SC018373