Patents by Inventor John Joseph Szarek

John Joseph Szarek 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).

  • Computer system with a device for selectively blocking writebacks of data from a writeback cache to memory
    Patent number: 5664150
    Abstract: A computer system that has a main memory and a writeback cache memory also has an I/O device capable of data streaming. A memory controller responds to signals that the I/O device will perform a burst transfer of data to the main memory and blocks potential writebacks from the cache memory to the I/O device. Potential writing over of the data from the I/O device by a flushed cache line written back to the main memory is thereby prevented. The system performance is increased since the data from the I/O device can be written to the main memory without waiting for a snoop cycle and a writeback to be performed.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: September 2, 1997
    Assignee: International Business Machines Corporation
    Inventors: Gerald George Isaac, John K. Langgood, Wan Lin Leung, Kimberly Kibbe Sendlein, John Joseph Szarek, Edward Yee