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:
Mar. 02, 2004
Filed:
Aug. 31, 2000
Roger Pannel, Nashua, NH (US);
David W. Hartwell, Bolton, MA (US);
Samuel H. Duncan, Arlington, MA (US);
Rajen Ramchandani, Arlington, MA (US);
Andrej Kocev, Shirley, MA (US);
Jeffrey Willcox, Westford, MA (US);
Steven Ho, Westford, MA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method and apparatus for accommodating the speed requirements of a DMA read request from PCI protocol I/O devices attached via a DMA to a multiprocessor system mesh. A bridge between the device controller and the mesh is described which buffers the data from the memory in cache lines from which the data is delivered finally to the I/O device. The system is adaptive in that the number of cache lines required in past reads are remembered and used to determine if the number of cache lines is reduced or increased.