Transaction generator for on-chip interconnect fabric

    公开(公告)号:US12189565B2

    公开(公告)日:2025-01-07

    申请号:US18306087

    申请日:2023-04-24

    Applicant: Apple Inc.

    Abstract: In an embodiment, an SOC includes a global communication fabric that includes multiple independent networks having different communication and coherency protocols, and a plurality of input-output (I/O) clusters that includes different sets of local functional circuits. A given I/O cluster may be coupled to one or more of the independent networks and may include a particular set of local functional circuits, a local fabric coupled to the particular set of local functional circuits, and an interface circuit coupled to the local fabric and configured to bridge transactions between the particular set of local functional circuits and the global communication fabric. The interface circuit may include a programmable hardware transaction generator circuit configured to generate a set of test transactions that simulate interactions between the particular set of local functional circuits and a particular one of the one or more independent networks.

    Memory bank with subdomains
    2.
    发明授权

    公开(公告)号:US12067275B1

    公开(公告)日:2024-08-20

    申请号:US17810275

    申请日:2022-06-30

    Applicant: Apple Inc.

    Abstract: Techniques are disclosed relating to an I/O agent circuit. The I/O agent circuit may include a memory bank and be coupled to a set of devices. The I/O agent circuit may assign a device of the set of devices to a subdomain of a plurality of subdomains implemented for the memory bank. The I/O agent circuit may store, in that memory bank, a set of transactions of the device in association with the subdomain assigned to the device. The I/O agent circuit may execute the set of transactions such that transactions stored in the memory bank in association with other ones of the plurality of subdomains than the subdomain assigned to the device do not block execution of the set of transactions.

    Scalable Cache Coherency Protocol

    公开(公告)号:US20220083472A1

    公开(公告)日:2022-03-17

    申请号:US17315725

    申请日:2021-05-10

    Applicant: Apple Inc.

    Abstract: 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.

    Telemetry push aggregation
    4.
    发明授权

    公开(公告)号:US11822411B2

    公开(公告)日:2023-11-21

    申请号:US17313837

    申请日:2021-05-06

    Applicant: Apple Inc.

    CPC classification number: G06F1/3206 G06F11/3003 G06F11/3062 G06F11/3495

    Abstract: Systems, apparatuses, and methods for implementing telemetry push aggregation techniques are described. A computing system includes one or more input/output (I/O) agents interposed between functional units and a communication fabric. A given I/O agent receives a set of aggregation rules from a power management unit. The I/O agent monitors traffic from the functional units, and the I/O agent generates telemetry data from the traffic data based on the set of aggregation rules. The telemetry data is used by the power management unit to make adjustments to one or more power settings.

    Communication Fabric Structures for Increased Bandwidth

    公开(公告)号:US20250097166A1

    公开(公告)日:2025-03-20

    申请号:US18433184

    申请日:2024-02-05

    Applicant: Apple Inc.

    Abstract: An apparatus includes first agents configured to transfer transactions using an ordered protocol, as well as second agents configured to transfer transactions using a protocol with no enforced ordering. The apparatus may also include input/output (I/O) interfaces coupled to respective ones of the first agents and configured to enforce the ordered protocol. The apparatus may further include a communication network including a plurality of network switches. A particular one of the network switches may be coupled to at least one other network switch of the plurality. The apparatus may also include a network interface coupled to the second agents, to the I/O interfaces, and to the particular network switch. This network interface may be configured to transfer data transactions between the second agents and the particular network switch, and to transfer data transactions between the I/O interfaces and the particular network switch.

    Telemetry Push Aggregation
    8.
    发明公开

    公开(公告)号:US20240160267A1

    公开(公告)日:2024-05-16

    申请号:US18510525

    申请日:2023-11-15

    Applicant: Apple Inc.

    CPC classification number: G06F1/3206 G06F11/3003 G06F11/3062 G06F11/3495

    Abstract: Systems, apparatuses, and methods for implementing telemetry push aggregation techniques are described. A computing system includes one or more input/output (I/O) agents interposed between functional units and a communication fabric. A given I/O agent receives a set of aggregation rules from a power management unit. The I/O agent monitors traffic from the functional units, and the I/O agent generates telemetry data from the traffic data based on the set of aggregation rules. The telemetry data is used by the power management unit to make adjustments to one or more power settings.

    Transaction Generator for On-chip Interconnect Fabric

    公开(公告)号:US20230334003A1

    公开(公告)日:2023-10-19

    申请号:US18306087

    申请日:2023-04-24

    Applicant: Apple Inc.

    Abstract: In an embodiment, an SOC includes a global communication fabric that includes multiple independent networks having different communication and coherency protocols, and a plurality of input-output (I/O) clusters that includes different sets of local functional circuits. A given I/O cluster may be coupled to one or more of the independent networks and may include a particular set of local functional circuits, a local fabric coupled to the particular set of local functional circuits, and an interface circuit coupled to the local fabric and configured to bridge transactions between the particular set of local functional circuits and the global communication fabric. The interface circuit may include a programmable hardware transaction generator circuit configured to generate a set of test transactions that simulate interactions between the particular set of local functional circuits and a particular one of the one or more independent networks.

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