The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2012
Filed:
Mar. 30, 2009
Holly Katherine Cummins, Winchester, GB;
Anthony Phillips, Hampshire, GB;
Andrew Dean Wharmby, Hampshire, GB;
Holly Katherine Cummins, Winchester, GB;
Anthony Phillips, Hampshire, GB;
Andrew Dean Wharmby, Hampshire, GB;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system and computer program product for batched remapping of virtual memory addresses for garbage collection in a large object area. A mapping from a table having a first set of virtual memory addresses and sizes of non-contiguous, page-aligned large objects in a large object area to a remapping table having a second set of virtual memory addresses is determined. In a single batch, a request is received that includes the second set of virtual addresses and requests a remapping of the large objects to the second set of virtual memory addresses. The second set of virtual memory addresses is validated, and the large objects are remapped to the second set of virtual memory addresses according to the request. The remapping results in a compaction so that the large objects are contiguous in the large object area. The remapping does not require copying data in physical memory.