Patents by Inventor Madhu Sharna

Madhu Sharna has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system for a processor to gain assured ownership of an up-to-date copy of data
    Patent number: 6636948
    Abstract: A performance enhancing change-to-dirty operation (CTD) is disclosed wherein contention among several processors trying to gain ownership of a block of data is obviated by arranging the CTD to always succeed. A method and a system are disclosed where a processor in a multiprocessor system having a copy of data gains assured ownership of data that the processor may then write. The method provides for the possibilities of conditions that may exist and provides a scenario that the requesting processor may have to wait for the ownership. Conditions are handled where the memory is the “owner” of the data and where other processor are requesting ownership, and where copies of the data exist at other processors. The method provides for messages to other processor having copies of the data informing them that the data is now invalid.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: October 21, 2003
    Assignee: Hewlett-Packard Development Company, LP.
    Inventors: Simon C. Steely, Jr., Stephen R. Van Doren, Madhu Sharna