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:
Aug. 03, 1999
Filed:
Dec. 02, 1996
Daniel Lloyd McNabb, Los Gatos, CA (US);
Scott Lyon Porter, Austin, TX (US);
James Christopher Wyllie, Monte Sereno, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A multimedia datastreaming system includes one of a plurality of differing pre-existing file systems each supporting a set of zero copy function interfaces. A method is provided for supporting the zero copy function of a datastream file with the pre-existing file system. A general purpose file system interface is established to the pre-existing file systems. The general purpose file system interface is then invoked to affect zero copy transfer of the datastream from a producer module to a consumer module. An initial prefetch of data associated with the datastream file is initiated in response to an I/O command issued from a multimedia file system daemon, such prefetch being from mass storage to a buffer in shared memory in an interrupt context.