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    • 4. 发明申请
    • Sparse Threaded Deterministic Lock-Free Cholesky and LDLT Factorizations
    • 稀疏线性确定性无锁Cholesky和LDLT因式分解
    • US20130346984A1
    • 2013-12-26
    • US13527670
    • 2012-06-20
    • Alexander Andrianov
    • Alexander Andrianov
    • G06F9/46
    • G06F9/4818G06F9/4881G06F9/5038G06F17/16G06F2209/506
    • Systems and methods are provided for implementing a sparse deterministic direct solver. The deterministic direct solver is configured to identify at least one task for each of a plurality of dense blocks, identify operations on which the tasks are dependent, store in a first data structure an entry for each of the dense blocks identifying whether a precondition must be satisfied before tasks associated with the dense blocks can be initiated, store in a second data structure a status value for each of the dense blocks that is changeable by multiple threads, and assign the tasks to a plurality of threads, wherein the threads execute their assigned task when the status of the dense block corresponding to their assigned task indicates that the assigned task is ready to be performed and the precondition associated with the dense block has been satisfied if the precondition exists.
    • 提供了用于实现稀疏确定性直接求解器的系统和方法。 确定性直接求解器被配置为为多个密集块中的每一个识别至少一个任务,识别哪个任务相关的操作,在第一数据结构中存储每个密集块的条目,以识别先决条件是否必须 在可以启动与密集块相关联的任务之前满足,在第二数据结构中存储可由多个线程改变的每个密集块的状态值,并将任务分配给多个线程,其中线程执行其分配 任务当对应于其分配的任务的密集块的状态指示分配的任务准备好被执行时,并且如果存在前提条件,则已经满足与密集块相关联的前提条件。