Patents by Inventor James Vash
James Vash 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).
-
Patent number: 11947457Abstract: A scalable cache coherency protocol for system including a plurality of coherent agents coupled to one or more memory controllers is described. The memory controller may implement a precise directory for cache blocks from the memory to which the memory controller is coupled. Multiple requests to a cache block may be outstanding, and snoops and completions for requests may include an expected cache state at the receiving agent, as indicated by a directory in the memory controller when the request was processed, to allow the receiving agent to detect race conditions. In an embodiment, the cache states may include a primary shared and a secondary shared state. The primary shared state may apply to a coherent agent that bears responsibility for transmitting a copy of the cache block to a requesting agent. In an embodiment, at least two types of snoops may be supported: snoop forward and snoop back.Type: GrantFiled: November 22, 2022Date of Patent: April 2, 2024Assignee: Apple Inc.Inventors: James Vash, Gaurav Garg, Brian P. Lilly, Ramesh B. Gunna, Steven R. Hutsell, Lital Levy-Rubin, Per H. Hammarlund, Harshavardhan Kaushikkar
-
Patent number: 11934265Abstract: Techniques are disclosed relating to memory error tracking and logging. In some embodiments, a memory cache controller circuitry is configured to track, using multiple circuit entries, numbers of detected correctable errors associated with multiple respective locations, and in response to detecting a threshold number of correctable errors for a particular location, generate a signal to the one or more processors that identifies the particular location. In some embodiments, the memory cache controller circuitry includes multiple circuit entries for tracking uncorrectable errors.Type: GrantFiled: June 1, 2022Date of Patent: March 19, 2024Assignee: Apple Inc.Inventors: Farid Nemati, Steven R. Hutsell, Derek R. Kumar, Bernard J. Semeria, James Vash, Era K. Nangia, Gregory S. Mathews
-
Patent number: 11934313Abstract: A system including a plurality of processor cores, a plurality of graphics processing units, a plurality of peripheral circuits, and a plurality of memory controllers is configured to support scaling of the system using a unified memory architecture.Type: GrantFiled: August 22, 2022Date of Patent: March 19, 2024Assignee: Apple Inc.Inventors: Per H. Hammarlund, Lior Zimet, James Vash, Gaurav Garg, Sergio Kolor, Harshavardhan Kaushikkar, Ramesh B. Gunna, Steven R. Hutsell
-
Patent number: 11868258Abstract: A scalable cache coherency protocol for system including a plurality of coherent agents coupled to one or more memory controllers is described. The memory controller may implement a precise directory for cache blocks from the memory to which the memory controller is coupled. Multiple requests to a cache block may be outstanding, and snoops and completions for requests may include an expected cache state at the receiving agent, as indicated by a directory in the memory controller when the request was processed, to allow the receiving agent to detect race conditions. In an embodiment, the cache states may include a primary shared and a secondary shared state. The primary shared state may apply to a coherent agent that bears responsibility for transmitting a copy of the cache block to a requesting agent. In an embodiment, at least two types of snoops may be supported: snoop forward and snoop back.Type: GrantFiled: January 27, 2023Date of Patent: January 9, 2024Assignee: Apple Inc.Inventors: James Vash, Gaurav Garg, Brian P. Lilly, Ramesh B. Gunna, Steven R. Hutsell, Lital Levy-Rubin, Per H. Hammarlund, Harshavardhan Kaushikkar
-
Publication number: 20230350828Abstract: In an embodiment, a system on a chip (SOC) comprises a semiconductor die on which circuitry is formed, wherein the circuitry comprises a plurality of agents and a plurality of network switches coupled to the plurality of agents. The plurality of network switches are interconnected to form a plurality of physical and logically independent networks. A first network of the plurality of physically and logically independent networks is constructed according to a first topology and a second network of the plurality of physically and logically independent networks is constructed according to a second topology that is different from the first topology. For example, the first topology may a ring topology and the second topology may be a mesh topology. In an embodiment, coherency may be enforced on the first network and the second network may be a relaxed order network.Type: ApplicationFiled: April 28, 2023Publication date: November 2, 2023Inventors: Sergio Kolor, Sergio V. Tota, Tzach Zemer, Sagi Lahav, Jonathan M. Redshaw, Per H. Hammarlund, Eran Tamari, James Vash, Gaurav Garg, Lior Zimet, Harshavardhan Kaushikkar, Steven Fishwick, Steven R. Hutsell, Shawn M. Fukami
-
Patent number: 11803471Abstract: An integrated circuit (IC) including a plurality of processor cores, a plurality of graphics processing units, a plurality of peripheral circuits, and a plurality of memory controllers is configured to support scaling of the system using a unified memory architecture. For example, the IC may include an interconnect fabric configured to provide communication between the one or more memory controller circuits and the processor cores, graphics processing units, and peripheral devices; and an off-chip interconnect coupled to the interconnect fabric and configured to couple the interconnect fabric to a corresponding interconnect fabric on another instance of the integrated circuit, wherein the interconnect fabric and the off-chip interconnect provide an interface that transparently connects the one or more memory controller circuits, the processor cores, graphics processing units, and peripheral devices in either a single instance of the integrated circuit or two or more instances of the integrated circuit.Type: GrantFiled: August 22, 2022Date of Patent: October 31, 2023Assignee: Apple Inc.Inventors: Per H. Hammarlund, Lior Zimet, Sergio Kolor, Sagi Lahav, James Vash, Gaurav Garg, Tal Kuzi, Jeffry E. Gonion, Charles E. Tucker, Lital Levy-Rubin, Dany Davidov, Steven Fishwick, Nir Leshem, Mark Pilip, Gerard R. Williams, III, Harshavardhan Kaushikkar, Srinivasa Rangan Sridharan
-
Publication number: 20230333851Abstract: Techniques are disclosed relating to data synchronization barrier operations. A system includes a first processor that may receive a data barrier operation request from a second processor include in the system. Based on receiving that data barrier operation request from the second processor, the first processor may ensure that outstanding load/store operations executed by the first processor that are directed to addresses outside of an exclusion region have been completed. The first processor may respond to the second processor that the data barrier operation request is complete at the first processor, even in the case that one or more load/store operations that are directed to addresses within the exclusion region are outstanding and not complete when the first processor responds that the data barrier operation request is complete.Type: ApplicationFiled: June 16, 2023Publication date: October 19, 2023Inventors: Jeff Gonion, John H. Kelm, James Vash, Pradeep Kanapathipillai, Mridul Agarwal, Gideon N. Levinsky, Richard F. Russo, Christopher M. Tsay
-
Publication number: 20230305924Abstract: Techniques are disclosed relating to memory error tracking and logging. In some embodiments, a memory cache controller circuitry is configured to track, using multiple circuit entries, numbers of detected correctable errors associated with multiple respective locations, and in response to detecting a threshold number of correctable errors for a particular location, generate a signal to the one or more processors that identifies the particular location. In some embodiments, the memory cache controller circuitry includes multiple circuit entries for tracking uncorrectable errors.Type: ApplicationFiled: June 1, 2022Publication date: September 28, 2023Inventors: Farid Nemati, Steven R. Hutsell, Derek R. Kumar, Bernard J. Semeria, James Vash, Era K. Nangia, Gregory S. Mathews
-
Patent number: 11768690Abstract: A system may include a plurality of processors and a coprocessor. A plurality of coprocessor context priority registers corresponding to a plurality of contexts supported by the coprocessor may be included. The plurality of processors may use the plurality of contexts, and may program the coprocessor context priority register corresponding to a context with a value specifying a priority of the context relative to other contexts. An arbiter may arbitrate among instructions issued by the plurality of processors based on the priorities in the plurality of coprocessor context priority registers. In one embodiment, real-time threads may be assigned higher priorities than bulk processing tasks, improving bandwidth allocated to the real-time threads as compared to the bulk tasks.Type: GrantFiled: November 22, 2021Date of Patent: September 26, 2023Assignee: Apple Inc.Inventors: Aditya Kesiraju, Andrew J. Beaumont-Smith, Brian P. Lilly, James Vash, Jason M. Kassoff, Krishna C. Potnuru, Rajdeep L. Bhuyar, Ran A. Chachick, Tyler J. Huberty, Derek R. Kumar
-
Patent number: 11720360Abstract: Techniques are disclosed relating to data synchronization barrier operations. A system includes a first processor that may receive a data barrier operation request from a second processor include in the system. Based on receiving that data barrier operation request from the second processor, the first processor may ensure that outstanding load/store operations executed by the first processor that are directed to addresses outside of an exclusion region have been completed. The first processor may respond to the second processor that the data barrier operation request is complete at the first processor, even in the case that one or more load/store operations that are directed to addresses within the exclusion region are outstanding and not complete when the first processor responds that the data barrier operation request is complete.Type: GrantFiled: September 8, 2021Date of Patent: August 8, 2023Assignee: Apple Inc.Inventors: Jeff Gonion, John H. Kelm, James Vash, Pradeep Kanapathipillai, Mridul Agarwal, Gideon N. Levinsky, Richard F. Russo, Christopher M. Tsay
-
Patent number: 11675722Abstract: In an embodiment, a system on a chip (SOC) comprises a semiconductor die on which circuitry is formed, wherein the circuitry comprises a plurality of agents and a plurality of network switches coupled to the plurality of agents. The plurality of network switches are interconnected to form a plurality of physical and logically independent networks. A first network of the plurality of physically and logically independent networks is constructed according to a first topology and a second network of the plurality of physically and logically independent networks is constructed according to a second topology that is different from the first topology. For example, the first topology may a ring topology and the second topology may be a mesh topology. In an embodiment, coherency may be enforced on the first network and the second network may be a relaxed order network.Type: GrantFiled: June 3, 2021Date of Patent: June 13, 2023Assignee: Apple Inc.Inventors: Sergio Kolor, Sergio V. Tota, Tzach Zemer, Sagi Lahav, Jonathan M. Redshaw, Per H. Hammarlund, Eran Tamari, James Vash, Gaurav Garg, Lior Zimet, Harshavardhan Kaushikkar, Steven Fishwick, Steven R. Hutsell, Shawn M. Fukami
-
Publication number: 20230169003Abstract: A scalable cache coherency protocol for system including a plurality of coherent agents coupled to one or more memory controllers is described. The memory controller may implement a precise directory for cache blocks from the memory to which the memory controller is coupled. Multiple requests to a cache block may be outstanding, and snoops and completions for requests may include an expected cache state at the receiving agent, as indicated by a directory in the memory controller when the request was processed, to allow the receiving agent to detect race conditions. In an embodiment, the cache states may include a primary shared and a secondary shared state. The primary shared state may apply to a coherent agent that bears responsibility for transmitting a copy of the cache block to a requesting agent. In an embodiment, at least two types of snoops may be supported: snoop forward and snoop back.Type: ApplicationFiled: January 27, 2023Publication date: June 1, 2023Inventors: James Vash, Gaurav Garg, Brian P. Lilly, Ramesh B. Gunna, Steven R. Hutsell, Lital Levy-Rubin, Per H. Hammarlund, Harshavardhan Kaushikkar
-
Publication number: 20230083397Abstract: A scalable cache coherency protocol for system including a plurality of coherent agents coupled to one or more memory controllers is described. The memory controller may implement a precise directory for cache blocks from the memory to which the memory controller is coupled. Multiple requests to a cache block may be outstanding, and snoops and completions for requests may include an expected cache state at the receiving agent, as indicated by a directory in the memory controller when the request was processed, to allow the receiving agent to detect race conditions. In an embodiment, the cache states may include a primary shared and a secondary shared state. The primary shared state may apply to a coherent agent that bears responsibility for transmitting a copy of the cache block to a requesting agent. In an embodiment, at least two types of snoops may be supported: snoop forward and snoop back.Type: ApplicationFiled: November 22, 2022Publication date: March 16, 2023Inventors: James Vash, Gaurav Garg, Brian P. Lilly, Ramesh B. Gunna, Steven R. Hutsell, Lital Levy-Rubin, Per H. Hammarlund, Harshavardhan Kaushikkar
-
Publication number: 20230053530Abstract: A system including a plurality of processor cores, a plurality of graphics processing units, a plurality of peripheral circuits, and a plurality of memory controllers is configured to support scaling of the system using a unified memory architecture.Type: ApplicationFiled: August 22, 2022Publication date: February 23, 2023Inventors: Per H. Hammarlund, Eran Tamari, Lior Zimet, Sergio Kolor, Sergio V. Tota, Sagi Lahav, James Vash, Gaurav Garg, Jonathan M. Redshaw, Steven R. Hutsell, Harshavardhan Kaushikkar, Shawn M. Fukami
-
Publication number: 20230056044Abstract: A system including a plurality of processor cores, a plurality of graphics processing units, a plurality of peripheral circuits, and a plurality of memory controllers is configured to support scaling of the system using a unified memory architecture.Type: ApplicationFiled: August 22, 2022Publication date: February 23, 2023Inventors: Per H. Hammarlund, Lior Zimet, James Vash, Gaurav Garg, Sergio Kolor, Harshavardhan Kaushikkar, Ramesh B. Gunna, Steven R. Hutsell
-
Publication number: 20230058989Abstract: An integrated circuit (IC) including a plurality of processor cores, a plurality of graphics processing units, a plurality of peripheral circuits, and a plurality of memory controllers is configured to support scaling of the system using a unified memory architecture. For example, the IC may include an interconnect fabric configured to provide communication between the one or more memory controller circuits and the processor cores, graphics processing units, and peripheral devices; and an off-chip interconnect coupled to the interconnect fabric and configured to couple the interconnect fabric to a corresponding interconnect fabric on another instance of the integrated circuit, wherein the interconnect fabric and the off-chip interconnect provide an interface that transparently connects the one or more memory controller circuits, the processor cores, graphics processing units, and peripheral devices in either a single instance of the integrated circuit or two or more instances of the integrated circuit.Type: ApplicationFiled: August 22, 2022Publication date: February 23, 2023Inventors: Per H. Hammarlund, Lior Zimet, Sergio Kolor, Sagi Lahav, James Vash, Gaurav Garg, Tal Kuzi, Jeffry E. Gonion, Charles E. Tucker, Lital Levy-Rubin, Dany Davidov, Steven Fishwick, Nir Leshem, Mark Pilip, Gerard R. Williams, III, Harshavardhan Kaushikkar, Srinivasan Rangan Sridharan
-
Patent number: 11550716Abstract: Techniques are disclosed relating to an I/O agent circuit of a computer system. The I/O agent circuit may receive, from a peripheral component, a set of transaction requests to perform a set of read transactions that are directed to one or more of a plurality of cache lines. The I/O agent circuit may issue, to a first memory controller circuit configured to manage access to a first one of the plurality of cache lines, a request for exclusive read ownership of the first cache line such that data of the first cache line is not cached outside of the memory and the I/O agent circuit in a valid state. The I/O agent circuit may receive exclusive read ownership of the first cache line, including receiving the data of the first cache line. The I/O agent circuit may then perform the set of read transactions with respect to the data.Type: GrantFiled: January 14, 2022Date of Patent: January 10, 2023Assignee: Apple Inc.Inventors: Gaurav Garg, Sagi Lahav, Lital Levy-Rubin, Gerard Williams, III, Samer Nassar, Per H. Hammarlund, Harshavardhan Kaushikkar, Srinivasa Rangan Sridharan, Jeff Gonion, James Vash
-
Patent number: 11544193Abstract: A scalable cache coherency protocol for system including a plurality of coherent agents coupled to one or more memory controllers is described. The memory controller may implement a precise directory for cache blocks from the memory to which the memory controller is coupled. Multiple requests to a cache block may be outstanding, and snoops and completions for requests may include an expected cache state at the receiving agent, as indicated by a directory in the memory controller when the request was processed, to allow the receiving agent to detect race conditions. In an embodiment, the cache states may include a primary shared and a secondary shared state. The primary shared state may apply to a coherent agent that bears responsibility for transmitting a copy of the cache block to a requesting agent. In an embodiment, at least two types of snoops may be supported: snoop forward and snoop back.Type: GrantFiled: May 10, 2021Date of Patent: January 3, 2023Assignee: Apple Inc.Inventors: James Vash, Gaurav Garg, Brian P. Lilly, Ramesh B. Gunna, Steven R. Hutsell, Lital Levy-Rubin, Per H. Hammarlund, Harshavardhan Kaushikkar
-
Patent number: 11500638Abstract: A method and system for compressing and decompressing data is disclosed. A compression command may initiate the prefetching of first data, which may be stored in a first buffer. Multiple words of the first data may be read from the first buffer and used to generate a plurality of compressed packets, each of which includes a command specifying a type of packet. The compressed packets may be combined into a group and multiple groups may be combined and stored in a second buffer. A decompression command may initiate the prefetching of second data, which is stored in the first buffer. A portion of the second data may be read from the first buffer and used to generate a group of compressed packets. Multiple output words may be generated dependent upon the group of compressed packets.Type: GrantFiled: January 10, 2020Date of Patent: November 15, 2022Assignee: Apple Inc.Inventors: Aditya Kesiraju, James Vash, Pradeep Kanapathipillai, Mridul Agarwal, Zhaoming Hu, Tyler Huberty, Charles Tucker
-
Publication number: 20220334997Abstract: In an embodiment, a system on a chip (SOC) comprises a semiconductor die on which circuitry is formed, wherein the circuitry comprises a plurality of agents and a plurality of network switches coupled to the plurality of agents. The plurality of network switches are interconnected to form a plurality of physical and logically independent networks. A first network of the plurality of physically and logically independent networks is constructed according to a first topology and a second network of the plurality of physically and logically independent networks is constructed according to a second topology that is different from the first topology. For example, the first topology may a ring topology and the second topology may be a mesh topology. In an embodiment, coherency may be enforced on the first network and the second network may be a relaxed order network.Type: ApplicationFiled: June 3, 2021Publication date: October 20, 2022Inventors: Sergio Kolor, Sergio V. Tota, Tzach Zemer, Sagi Lahav, Jonathan M. Redshaw, Per H. Hammarlund, Eran Tamari, James Vash, Gaurav Garg