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    Memory management supporting huge pages
    2.
    发明授权
    Memory management supporting huge pages 有权

    公开(公告)号：US10108550B2

    公开(公告)日：2018-10-23

    申请号：US15273433

    申请日：2016-09-22

    Applicant: Google LLC

    Inventor： Joel Dylan Coburn ,  Albert Borchers ,  Christopher Lyle Johnson ,  Robert S. Sprinkle

    IPC: G06F12/08 ,  G06F12/0868 ,  G06F12/0871 ,  G06F12/0873 ,  G06F12/12 ,  G06F12/1009 ,  G06F12/1027

    Abstract: Methods, systems, and apparatus for receiving a request to access, from a main memory, data contained in a first portion of a first page of data, the first page of data having a first page size; initiating a page fault based on determining that the first page of data is not stored in the main memory; allocating a portion of the main memory equivalent to the first page size; transferring the first portion of the first page of data from the secondary memory to the allocated portion of the main memory without transferring the entire first page of data; and updating a first page table entry associated with the first portion of the first page of data to point to a location of the allocated portion of the main memory to which the first portion of the first page of data is transferred.

    In-band optical interference mitigation for direct-detection optical communication systems
    3.
    发明授权
    In-band optical interference mitigation for direct-detection optical communication systems 有权

    公开(公告)号：US10084547B2

    公开(公告)日：2018-09-25

    申请号：US15914583

    申请日：2018-03-07

    Applicant: Google LLC

    Inventor： Xiang Zhou ,  Ryohei Urata ,  Erji Mao ,  Hong Liu ,  Christopher Lyle Johnson

    IPC: H04B10/00 ,  H04B10/69

    Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of interference signals on optical signals received at a direct-detection optical receivers. The optical receivers are capable of attenuating interference noise signals resulting from the interference between a transmitted optical signal transmitted from a transmitter to the optical receiver and one or more additional signals received at the optical receiver. The interference can be due to multi-path interference or due to in-band interference. The receivers include a tunable filter for filtering the received optical signal to remove the interference. A frequency offset module processes the received optical signal to determine a frequency offset indicative of the difference between the carrier frequencies of a modulated optical signal and an interference optical signal. The offset frequency and a bandwidth determined by the frequency offset module can be used to adjust the tunable filter to remove the interference signal from the received signal.

    Hybrid memory management
    4.
    发明授权
    Hybrid memory management 有权

    公开(公告)号：US10705975B2

    公开(公告)日：2020-07-07

    申请号：US16182695

    申请日：2018-11-07

    Applicant: Google LLC

    Inventor： Joel Dylan Coburn ,  Albert Borchers ,  Christopher Lyle Johnson ,  Robert S. Sprinkle

    IPC: G06F12/10 ,  G06F12/1009 ,  G06F12/121

    Abstract: Methods, systems, and apparatus for determining whether an access bit is set for each page table entry of a page table based on a scan of the page table with at least one page table walker, the access bit indicating whether a page associated with the page table entry was accessed in a last scan period; incrementing a count for each page in response to determining that the access bit is set for the page table entry associated with the page; resetting the access bit after determining whether the access bit is set for each page table entry; receiving a request to access, from a main memory, a first page of data; initiating a page fault based on determining that the first page of data is not stored in the main memory; and servicing the page fault with a DMA engine.

    Hybrid memory management
    5.
    发明授权
    Hybrid memory management 有权

    公开(公告)号：US10152427B2

    公开(公告)日：2018-12-11

    申请号：US15235495

    申请日：2016-08-12

    Applicant: Google LLC

    Inventor： Joel Dylan Coburn ,  Albert Borchers ,  Christopher Lyle Johnson ,  Robert S. Sprinkle

    IPC: G06F12/10 ,  G06F12/1009 ,  G06F12/121

    Abstract: Methods, systems, and apparatus for determining whether an access bit is set for each page table entry of a page table based on a scan of the page table with at least one page table walker, the access bit indicating whether a page associated with the page table entry was accessed in a last scan period; incrementing a count for each page in response to determining that the access bit is set for the page table entry associated with the page; resetting the access bit after determining whether the access bit is set for each page table entry; receiving a request to access, from a main memory, a first page of data; initiating a page fault based on determining that the first page of data is not stored in the main memory; and servicing the page fault with a DMA engine.

    IN-BAND OPTICAL INTERFERENCE MITIGATION FOR DIRECT-DETECTION OPTICAL COMMUNICATION SYSTEMS
    6.
    发明申请
    IN-BAND OPTICAL INTERFERENCE MITIGATION FOR DIRECT-DETECTION OPTICAL COMMUNICATION SYSTEMS 审中-公开

    公开(公告)号：US20180198533A1

    公开(公告)日：2018-07-12

    申请号：US15914583

    申请日：2018-03-07

    Applicant: Google LLC

    Inventor： Xiang Zhou ,  Ryohei Urata ,  Erji Mao ,  Hong Liu ,  Christopher Lyle Johnson

    IPC: H04B10/69

    CPC classification number: H04B10/6971 ,  H04B10/697

    Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of interference signals on optical signals received at a direct-detection optical receivers. The optical receivers are capable of attenuating interference noise signals resulting from the interference between a transmitted optical signal transmitted from a transmitter to the optical receiver and one or more additional signals received at the optical receiver. The interference can be due to multi-path interference or due to in-band interference. The receivers include a tunable filter for filtering the received optical signal to remove the interference. A frequency offset module processes the received optical signal to determine a frequency offset indicative of the difference between the carrier frequencies of a modulated optical signal and an interference optical signal. The offset frequency and a bandwidth determined by the frequency offset module can be used to adjust the tunable filter to remove the interference signal from the received signal.

    HYBRID MEMORY MANAGEMENT
    7.
    发明申请
    HYBRID MEMORY MANAGEMENT 审中-公开

    公开(公告)号：US20190073314A1

    公开(公告)日：2019-03-07

    申请号：US16182695

    申请日：2018-11-07

    Applicant: Google LLC

    Inventor： Joel Dylan Coburn ,  Albert Borchers ,  Christopher Lyle Johnson ,  Robert S. Sprinkle

    IPC: G06F12/1009 ,  G06F12/121

    CPC classification number: G06F12/1009 ,  G06F12/121 ,  G06F2212/1024 ,  G06F2212/1032 ,  G06F2212/152 ,  G06F2212/657

    Abstract: Methods, systems, and apparatus for determining whether an access bit is set for each page table entry of a page table based on a scan of the page table with at least one page table walker, the access bit indicating whether a page associated with the page table entry was accessed in a last scan period; incrementing a count for each page in response to determining that the access bit is set for the page table entry associated with the page; resetting the access bit after determining whether the access bit is set for each page table entry; receiving a request to access, from a main memory, a first page of data; initiating a page fault based on determining that the first page of data is not stored in the main memory; and servicing the page fault with a DMA engine.

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