Patents by Inventor Evan H. Gewirtz

Evan H. Gewirtz 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).

  • Apparatus and method for synchronizing multiple threads in an out-of-order microprocessor
    Patent number: 7493615
    Abstract: The present invention generally relates to synchronization of multiple threads in an out-of-order microprocessor utilizing the insertion of a trap. In one embodiment, while synchronizing multiple running threads, an instruction within a first running thread is identified. Upon identification of this instruction, a trap is inserted into a second running thread. All instructions within the instructional pipeline that are scheduled for execution prior to this trapped instruction must retire before the subsequent execution of the synchronizing instruction. Following the execution of the synchronizing instruction, all instructions within the instruction pipeline slated for execution after the trapped instruction in the remaining threads are flushed and refetched.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: February 17, 2009
    Assignee: Sun Microsystems, Inc.
    Inventors: Evan H. Gewirtz, Todd D. Basso, Daniel L. Leibholz, Benjamin C. Cordes
  • Apparatus and method for synchronizing multiple threads in an out-of-order microprocessor
    Publication number: 20040230975
    Abstract: The present invention generally relates to synchronization of multiple threads in an out-of-order microprocessor utilizing the insertion of a trap. In one embodiment, while synchronizing multiple running threads, an instruction within a first running thread is identified. Upon identification of this instruction, a trap is inserted into a second running thread. All instructions within the instructional pipeline that are scheduled for execution prior to this trapped instruction must retire before the subsequent execution of the synchronizing instruction. Following the execution of the synchronizing instruction, all instructions within the instruction pipeline slated for execution after the trapped instruction in the remaining threads are flushed and refetched.
    Type: Application
    Filed: May 1, 2003
    Publication date: November 18, 2004
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: Evan H. Gewirtz, Todd D. Basso, Daniel L. Leibholz, Benjamin C. Cordes