Search Patents
  • Publication number: 20070162911
    Abstract: In one embodiment, a processor is provided. The processor includes at least two cores, where each of the cores include a first level cache memory. Each of the cores are multi-threaded. In another embodiment, each of the cores includes four threads. In another embodiment a crossbar is included. A plurality of cache bank memories in communication with the at cores through the crossbar is provided. Each of the plurality of cache bank memories are in communication with a main memory interface. In another embodiment a buffer switch core in communication with each of the plurality of cache bank memories is also included. A server and a method for optimizing the utilization of a multithreaded processor core are also provided.
    Type: Application
    Filed: March 14, 2007
    Publication date: July 12, 2007
    Inventors: Leslie Kohn, Kunle Olukotun, Michael Wong
  • Publication number: 20060136605
    Abstract: A processor chip is provided. The processor chip includes a plurality of processing cores where each of the processing cores being multi-threaded. The plurality of processing cores are located in a center region of the processor chip. A plurality of cache bank memories are included. A crossbar enabling communication between the plurality of processing cores and the plurality of cache bank memories is provided. The crossbar includes a centrally located arbiter configured to sort multiple requests received from the plurality of processing cores and the crossbar is defined over the plurality of processing cores. In another embodiment, the processor chip is oriented so that the cache bank memories are defined in the center region. A server is also included.
    Type: Application
    Filed: May 26, 2004
    Publication date: June 22, 2006
    Applicant: Sun Microsystems, Inc.
    Inventor: Kunle Olukotun
  • Publication number: 20030093614
    Abstract: A system and method for limiting power consumption of a computer memory system. The system and method includes selecting a memory access rate. The selected memory access rate corresponds to a desired average memory power consumption rate. A first time interval is started as a current time interval. A memory system is accessed. If the memory access rate has not been exceeded, then the access is applied to the memory system.
    Type: Application
    Filed: October 18, 2002
    Publication date: May 15, 2003
    Applicant: SUN Microsystems
    Inventors: Leslie D. Kohn, Kunle A. Olukotun, Michael K. Wong
  • Publication number: 20030088610
    Abstract: In one embodiment, a processor is provided. The processor includes at least two cores, where each of the cores include a first level cache memory. Each of the cores are multi-threaded. In another embodiment, each of the cores includes four threads. In another embodiment a crossbar is included. A plurality of cache bank memories in communication with the at cores through the crossbar is provided. Each of the plurality of cache bank memories are in communication with a main memory interface. In another embodiment a buffer switch core in communication with each of the plurality of cache bank memories is also included. A server and a method for optimizing the utilization of a multithreaded processor core are also provided.
    Type: Application
    Filed: October 16, 2002
    Publication date: May 8, 2003
    Applicant: Sun Microsystems, Inc.
    Inventors: Leslie D. Kohn, Kunle A. Olukotun, Michael K. Wong
  • Publication number: 20050044320
    Abstract: A server including an application processor chip. The application processor chip includes a plurality of processing cores, where each of the processing cores are multi-threaded. A plurality of cache bank memories is included. Each of the cache bank memories include a tag array region configured to store data associated with each line of the cache bank memories, a data array region configured to store the data of the cache bank memories, an access pipeline configured to handle accesses from the plurality of processing cores, and a miss handling control unit configured to control the sequencing of cache-line transfers between a corresponding cache bank memory and a main memory. A crossbar enabling communication between the plurality of processing cores and the plurality of cache bank memories is provided.
    Type: Application
    Filed: May 26, 2004
    Publication date: February 24, 2005
    Applicant: Sun Microsystems, Inc.
    Inventor: Kunle Olukotun
  • Patent number: 8463996
    Abstract: A processor chip is provided. The processor chip includes a plurality of processing cores where each of the processing cores being multi-threaded. The plurality of processing cores are located in a center region of the processor chip. A plurality of cache bank memories are included. A crossbar enabling communication between the plurality of processing cores and the plurality of cache bank memories is provided. The crossbar includes a centrally located arbiter configured to sort multiple requests received from the plurality of processing cores and the crossbar is defined over the plurality of processing cores. In another embodiment, the processor chip is oriented so that the cache bank memories are defined in the center region. A server is also included.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: June 11, 2013
    Assignee: Oracle America, Inc.
    Inventor: Kunle A. Olukotun
  • Publication number: 20050060457
    Abstract: A processor chip is provided. The processor chip includes a plurality of processing cores, where each of the processing cores are multi-threaded. The plurality of processing cores are located in a center region of the processor chip. A plurality of cache bank memories are included. A crossbar enabling communication between the plurality of processing cores and the plurality of cache bank memories is provided. The crossbar includes an arbiter configured to arbitrate multiple requests received from the plurality of processing cores with available outputs. The arbiter includes a barrel shifter configured to rotate the multiple requests for dynamic prioritization, and priority encoders associated with each of the available outputs. Each of the priority encoders have logic gates configured to disable priority encoder outputs. A method for arbitrating requests within a multi-core multi-thread processor is included.
    Type: Application
    Filed: May 26, 2004
    Publication date: March 17, 2005
    Applicant: Sun Microsystems, Inc.
    Inventor: Kunle Olukotun
  • Patent number: 7209996
    Abstract: In one embodiment, a processor is provided. The processor includes at least two cores, where each of the cores include a first level cache memory. Each of the cores are multi-threaded. In another embodiment, each of the cores includes four threads. In another embodiment a crossbar is included. A plurality of cache bank memories in communication with the at cores through the crossbar is provided. Each of the plurality of cache bank memories are in communication with a main memory interface. In another embodiment a buffer switch core in communication with each of the plurality of cache bank memories is also included. A server and a method for optimizing the utilization of a multithreaded processor core are also provided.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: April 24, 2007
    Assignee: Sun Microsystems, Inc.
    Inventors: Leslie D. Kohn, Kunle A. Olukotun, Michael K. Wong
  • Publication number: 20050044319
    Abstract: A processor is provided. The processor includes at least two cores. The at least two cores have a first level cache memory and are multi-threaded. A crossbar is included. A plurality of cache bank memories in communication with the at least two cores through the crossbar is provided. Each of the plurality of cache bank memories communicates with a main memory interface. A plurality of input/output interface modules in communication with the main memory interface and providing a link to the at least two cores are included. The link bypasses the plurality of cache bank memories and the crossbar. Threading hardware configured to enable the at least two cores to switch from a first thread to a second thread in a manner hiding delays caused by cache accesses is included. A server and a method for determining when to switch threads in a multi-core multi-thread environment are included.
    Type: Application
    Filed: May 26, 2004
    Publication date: February 24, 2005
    Applicant: Sun Microsystems, Inc.
    Inventor: Kunle Olukotun
  • Patent number: 6938119
    Abstract: A system and method for limiting power consumption of a computer memory system. The system and method includes selecting a memory access rate. The selected memory access rate corresponds to a desired average memory power consumption rate. A first time interval is started as a current time interval. A memory system is accessed. If the memory access rate has not been exceeded, then the access is applied to the memory system. Alternatively, if the memory access rate has been exceeded, then the access is delayed until the current time interval has expired and a subsequent time interval is started as the current time interval and the access is applied to the memory system.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: August 30, 2005
    Assignee: Sun Microsystems, Inc.
    Inventors: Leslie D. Kohn, Kunle A. Olukotun, Michael K. Wong
  • Patent number: 7133950
    Abstract: A processor chip is provided. The processor chip includes a plurality of processing cores, where each of the processing cores are multi-threaded. The plurality of processing cores are located in a center region of the processor chip. A plurality of cache bank memories are included. A crossbar enabling communication between the plurality of processing cores and the plurality of cache bank memories is provided. The crossbar includes an arbiter configured to arbitrate multiple requests received from the plurality of processing cores with available outputs. The arbiter includes a barrel shifter configured to rotate the multiple requests for dynamic prioritization, and priority encoders associated with each of the available outputs. Each of the priority encoders have logic gates configured to disable priority encoder outputs. A method for arbitrating requests within a multi-core multi-thread processor is included.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: November 7, 2006
    Assignee: Sun Microsystems, Inc.
    Inventor: Kunle A. Olukotun
  • Patent number: 7873785
    Abstract: A processor is provided. The processor includes at least two cores. The at least two cores have a first level cache memory and are multi-threaded. A crossbar is included. A plurality of cache bank memories in communication with the at least two cores through the crossbar is provided. Each of the plurality of cache bank memories communicates with a main memory interface. A plurality of input/output interface modules in communication with the main memory interface and providing a link to the at least two cores are included. The link bypasses the plurality of cache bank memories and the crossbar. Threading hardware configured to enable the at least two cores to switch from a first thread to a second thread in a manner hiding delays caused by cache accesses is included. A server and a method for determining when to switch threads in a multi-core multi-thread environment are included.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: January 18, 2011
    Assignee: Oracle America, Inc.
    Inventor: Kunle A. Olukotun
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