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    Two Stage Command Buffers To Overlap Iommu Map And Second Tier Memory Reads
    2.
    发明申请
    Two Stage Command Buffers To Overlap Iommu Map And Second Tier Memory Reads 审中-公开

    公开(公告)号：US20190227729A1

    公开(公告)日：2019-07-25

    申请号：US16373207

    申请日：2019-04-02

    申请人： Google LLC

    发明人： Monish Shah ,  Benjamin Charles Serebrin ,  Albert Borchers

    IPC分类号： G06F3/06 ,  G06F12/1081 ,  G06F12/08

    摘要： IOMMU map-in may be overlapped with second tier memory access, such that the two operations are at least partially performed at the same time. For example, when a second tier memory read into a storage device controller internal buffer is initiated, an IOMMU mapping may be built simultaneously. To achieve this overlap, a two-stage command buffer is used. In a first stage, content is read from a second tier memory address into the storage device controller internal buffer. In a second stage, the internal buffer is written into the DRAM physical address.

    Memory management supporting huge pages
    4.
    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

    申请人： Google LLC

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

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

    摘要： 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.

    Hybrid memory management
    5.
    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

    申请人： Google LLC

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

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

    摘要： 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
    6.
    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

    申请人： Google LLC

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

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

    摘要： 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
    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

    申请人： Google LLC

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

    IPC分类号： G06F12/1009 ,  G06F12/121

    CPC分类号： G06F12/1009 ,  G06F12/121 ,  G06F2212/1024 ,  G06F2212/1032 ,  G06F2212/152 ,  G06F2212/657

    摘要： 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.