Patents by Inventor Cissy Xumin Yuan

Cissy Xumin Yuan 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).

  • Speculative memory prefetch
    Patent number: 7930485
    Abstract: A system and method for pre-fetching data from system memory. A multi-core processor accesses a cache hit predictor concurrently with sending a memory request to a cache subsystem. The predictor has two tables. The first table is indexed by a portion of a memory address and provides a hit prediction based on a first counter value. The second table is indexed by a core number and provides a hit prediction based on a second counter value. If neither table predicts a hit, a pre-fetch request is sent to memory. In response to detecting said hit prediction is incorrect, the pre-fetch is cancelled.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: April 19, 2011
    Assignee: Globalfoundries Inc.
    Inventors: Michael K Fertig, Patrick Conway, Kevin Michael Lepak, Cissy Xumin Yuan
  • SPECULATIVE MEMORY PREFETCH
    Publication number: 20090024835
    Abstract: A system and method for pre-fetching data from system memory. A multi-core processor accesses a cache hit predictor concurrently with sending a memory request to a cache subsystem. The predictor has two tables. The first table is indexed by a portion of a memory address and provides a hit prediction based on a first counter value. The second table is indexed by a core number and provides a hit prediction based on a second counter value. If neither table predicts a hit, a pre-fetch request is sent to memory. In response to detecting said hit prediction is incorrect, the pre-fetch is cancelled.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 22, 2009
    Inventors: Michael K. Fertig, Patrick Conway, Kevin Michael Lepak, Cissy Xumin Yuan