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公开(公告)号:US12229069B2
公开(公告)日:2025-02-18
申请号:US17083200
申请日:2020-10-28
Applicant: Intel Corporation
Inventor: Pratik Marolia , Andrew Herdrich , Rajesh Sankaran , Rahul Pal , David Puffer , Sayantan Sur , Ajaya Durg
Abstract: Methods and apparatus for an accelerator controller hub (ACH). The ACH may be a stand-alone component or integrated on-die or on package in an accelerator such as a GPU. The ACH may include a host device link (HDL) interface, one or more Peripheral Component Interconnect Express (PCIe) interfaces, one or more high performance accelerator link (HPAL) interfaces, and a router, operatively coupled to each of the HDL interface, the one or more PCIe interfaces, and the one or more HPAL interfaces. The HDL interface is configured to be coupled to a host CPU via an HDL link and the one or more HPAL interfaces are configured to be coupled to one or more HPALs that are used to access high performance accelerator fabrics (HPAFs) such as NVlink fabrics and CCIX (Cache Coherent Interconnect for Accelerators) fabrics. Platforms including ACHs or accelerators with integrated ACHs support RDMA transfers using RDMA semantics to enable transfers between accelerator memory on initiators and targets without CPU involvement.
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公开(公告)号:US20210200678A1
公开(公告)日:2021-07-01
申请号:US16939197
申请日:2020-07-27
Applicant: Intel Corporation
Inventor: Rahul Pal , Philip Abraham , Ajaya Durg , Bahaa Fahim , Yen-Cheng Liu , Sanilkumar Mm
IPC: G06F12/0815 , G06F12/0893 , G06F11/10
Abstract: A processor, including a core; and a cache-coherent memory fabric coupled to the core and having a primary cache agent (PCA) configured to provide a primary access path; and a secondary cache agent (SCA) configured to provide a secondary access path that is redundant to the primary access path, wherein the PCA has a coherency controller configured to maintain data in the secondary access path coherent with data in the main access path.
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公开(公告)号:US10579414B2
公开(公告)日:2020-03-03
申请号:US15477064
申请日:2017-04-01
Applicant: Intel Corporation
Inventor: Niranjan K. Soundararajan , Saurabh Gupta , Sreenivas Subramoney , Rahul Pal , Ragavendra Natarajan , Daniel Deng , Jared W. Stark , Ronak Singhal , Hong Wang
Abstract: Embodiments of apparatuses, methods, and systems for misprediction-triggered local history-based branch prediction are described. In one embodiments, an apparatus includes a current pattern table and a local pattern table. The current pattern table has a plurality of entries, each entry in which to store a plurality of pattern lengths of a current pattern of one of a plurality of branch instructions. The local pattern table is to provide a first branch prediction based on the current pattern.
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公开(公告)号:US10514990B2
公开(公告)日:2019-12-24
申请号:US15823313
申请日:2017-11-27
Applicant: Intel Corporation
Inventor: Bahaa Fahim , Swadesh Choudhary , Rahul Pal , Vedaraman Geetha
Abstract: Operational faults, including transient faults, are detected within computing hardware for mission-critical applications. Operational requests received from a requestor node are to be processed by shared agents to produce corresponding responses. A first request is duplicated to be redundantly processed independently and asynchronously by distinct shared agents to produce redundant counterpart responses including a first redundant response and a second redundant response. The first redundant response is compared against the second redundant response. In response to a match, the redundant responses are merged to produce a single final response to the first request to be read by the requestor node. In response to a non-match, an exception response is performed.
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公开(公告)号:US20190163583A1
公开(公告)日:2019-05-30
申请号:US15823313
申请日:2017-11-27
Applicant: Intel Corporation
Inventor: Bahaa Fahim , Swadesh Choudhary , Rahul Pal , Vedaraman Geetha
Abstract: Operational faults, including transient faults, are detected within computing hardware for mission-critical applications. Operational requests received from a requestor node are to be processed by shared agents to produce corresponding responses. A first request is duplicated to be redundantly processed independently and asynchronously by distinct shared agents to produce redundant counterpart responses including a first redundant response and a second redundant response. The first redundant response is compared against the second redundant response. In response to a match, the redundant responses are merged to produce a single final response to the first request to be read by the requestor node. In response to a non-match, an exception response is performed.
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公开(公告)号:US20180173533A1
公开(公告)日:2018-06-21
申请号:US15383832
申请日:2016-12-19
Applicant: Intel Corporation
Inventor: Niranjan K. Soundararajan , Sreenivas Subramoney , Rahul Pal , Ragavendra Natarajan
IPC: G06F9/38
Abstract: A processor may include a baseline branch predictor and an empirical branch bias override circuit. The baseline branch predictor may receive a branch instruction associated with a given address identifier, and generate, based on a global branch history, an initial prediction of a branch direction for the instruction. The empirical branch bias override circuit may determine, dependent on a direction of an observed branch direction bias in executed branch instruction instances associated with the address identifier, whether the initial prediction should be overridden, may determine, in response to determining that the initial prediction should be overridden, a final prediction that matches the observed branch direction bias, or may determine, in response determining that the initial prediction should not be overridden, a final prediction that matches the initial prediction. The predictor may update an entry in the global branch history reflecting the resolved branch direction for the instruction following its execution.
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公开(公告)号:US09940238B2
公开(公告)日:2018-04-10
申请号:US15602603
申请日:2017-05-23
Applicant: INTEL CORPORATION
Inventor: Rahul Pal , Ishwar Agarwal , Manoj K. Arora
IPC: G06F12/08 , G06F12/084
CPC classification number: G06F12/084 , G06F2212/2542 , G06F2212/271
Abstract: A chip multiprocessor may include a first cluster and a second cluster, each having multiple cores of a processor, multiple co-located cache slices, and a memory controller. The processor stores directory information in a memory to indicate cluster cache ownership of a first address space to the first cluster. In response to a request to change the cluster cache ownership of the first address space to a second address space of the second cluster, the processor provides a quiesce period during which to block new read or write requests to the first cluster and the second cluster; drain read or write requests issued on the first cluster and the second cluster; and remove the block on new read or write requests. The processor may also update the directory information to change the cluster cache ownership of the first address space to the second address space of the second cluster.
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公开(公告)号:US20240031308A1
公开(公告)日:2024-01-25
申请号:US18478755
申请日:2023-09-29
Applicant: Intel Corporation
Inventor: Rahul Pal , Ashish Gupta , Keong Hong Oh , Gia Thuyet Ngo , Vikrant Kapila , Ankita Roy
IPC: H04L49/109
CPC classification number: H04L49/109
Abstract: An integrated circuit includes a core region of logic circuits and a network routed outside the core region. The network includes a wide layer and a narrow layer. The wide layer comprises first routers coupled in series. The narrow layer comprises second routers coupled in series.
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公开(公告)号:US11604730B2
公开(公告)日:2023-03-14
申请号:US16939197
申请日:2020-07-27
Applicant: Intel Corporation
Inventor: Rahul Pal , Philip Abraham , Ajaya Durg , Bahaa Fahim , Yen-Cheng Liu , Sanilkumar Mm
IPC: G06F12/08 , G06F12/0815 , G06F11/10 , G06F12/0893
Abstract: A processor, including a core; and a cache-coherent memory fabric coupled to the core and having a primary cache agent (PCA) configured to provide a primary access path; and a secondary cache agent (SCA) configured to provide a secondary access path that is redundant to the primary access path, wherein the PCA has a coherency controller configured to maintain data in the secondary access path coherent with data in the main access path.
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公开(公告)号:US10831628B2
公开(公告)日:2020-11-10
申请号:US16218078
申请日:2018-12-12
Applicant: Intel Corporation
Inventor: Umberto Santoni , Rahul Pal , Philip Abraham , Mahesh Mamidipaka , C Santhosh
IPC: G06F11/273 , G06F11/16 , G06F11/10
Abstract: A method to check for redundancy in two or more data lines comprises receiving data on a first data line, computing a first cyclic redundancy check (CRC) value on the data of the first data line, performing an exclusive OR (XOR) function on the first CRC value with a stored memory value, and updating the stored memory value with a result of the XOR function, and repeating on additional data lines until a last line is processed such that an error is indicated if a final stored memory value is not zero. An apparatus to check that two cores are operating in lockstep comprises a first core comprising a first data checker, a second core comprising a second data checker, and a lockstep checker to compare an output of the first data checker with an output of the second data checker.
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