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    AUTOMATIC OUT-OF-BOUND ACCESS PREVENTION IN GPU KERNELS EXECUTED IN A MANAGED ENVIRONMENT
    2.
    发明申请
    AUTOMATIC OUT-OF-BOUND ACCESS PREVENTION IN GPU KERNELS EXECUTED IN A MANAGED ENVIRONMENT 有权

    公开(公告)号：US20210165699A1

    公开(公告)日：2021-06-03

    申请号：US16701797

    申请日：2019-12-03

    Applicant: ORACLE INTERNATIONAL CORPORATION

    Inventor： ALBERTO PARRAVICINI ,  DAVIDE BARTOLINI ,  LUKAS STADLER ,  ARNAUD DELAMARE

    IPC: G06F9/54 ,  G06F9/455 ,  G06F9/30 ,  G06F9/38 ,  G06F8/41 ,  G06F15/80

    Abstract: Techniques are provided for an automated method of adding out-of-bound access prevention in GPU kernels executed in a managed environment. In an embodiment, a system of computers compiles a GPU kernel code function that includes one or more array references that are memory address dependent. The system of computers compiles the kernel code function by generating a rewritten GPU kernel code module that includes, within the function signature of the rewritten GPU kernel code module, a respective array size parameter for each array reference of the one or more array references included in the GPU kernel code function. The system of computers further compiles the kernel code function by adding bounding protection instructions to the one or more potential out-of-bound access instructions in the rewritten GPU kernel code module. The potential out-of-bound access instructions comprise instructions that reference each respective array size parameter of the one or more array references. Afterwards, the rewritten GPU kernel code module is loaded in a virtual machine. Loading the rewritten GPU kernel code module in the virtual machine comprises modifying a host application to automatically transmit, from the host application, one or more input array size values. The one or more input array size values is referenced by the one or more potential out-of-bound-access instructions.

    OPTIMIZING GRAPH QUERIES BY PERFORMING EARLY PRUNING
    3.
    发明申请
    OPTIMIZING GRAPH QUERIES BY PERFORMING EARLY PRUNING 有权

    公开(公告)号：US20210216590A1

    公开(公告)日：2021-07-15

    申请号：US16738972

    申请日：2020-01-09

    Applicant: ORACLE INTERNATIONAL CORPORATION

    Inventor： ARNAUD DELAMARE ,  VASILEIOS TRIGONAKIS ,  JEAN-PIERRE LOZI ,  VLAD IOAN HAPRIAN ,  PETR KOUPY ,  HASSAN CHAFI ,  SUNGPACK HONG

    IPC: G06F16/901 ,  G06F16/9032 ,  G06F16/903 ,  G06F16/2453

    Abstract: Techniques are described herein for early pruning of potential graph query results. Specifically, based on determining that property values of a path through graph data cannot affect results of a query, the path is pruned from a set of potential query solutions prior to fully exploring the path. Early solution pruning is performed on prunable queries that project prunable functions including MIN, MAX, SUM, and DISTINCT, the results of which are not tied to a number of paths explored for query execution. A database system implements early solution pruning for a prunable query based on intermediate results maintained for the query during query execution. Specifically, when a system determines that property values of a given potential solution path cannot affect the query results reflected in intermediate results maintained for the query, the path is discarded from the set of possible query solutions without further exploration of the path.

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