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    Method for in-service RAM testing
    8.
    发明授权
    Method for in-service RAM testing 失效
    在线RAM测试方法

    公开(公告)号：US06671645B2

    公开(公告)日：2003-12-30

    申请号：US09968277

    申请日：2001-09-28

    申请人： Kenneth Mark Maxham

    发明人： Kenneth Mark Maxham

    IPC分类号： G06F1900

    CPC分类号： G06F12/1009 ,  G06F12/1425

    摘要： A method for in-service RAM testing in computer systems and networks having a virtual memory. The method involves identifying a number n of physical memory units pi, i=1 . . . n, in the RAM and a number n−1 of virtual memory units vj, j=1 . . . n−1, in the virtual memory, performing a one-to-one mapping to map the physical memory units pi to virtual memory units vj such that a physical memory unit px is left unmapped, and then testing data in the unmapped physical memory unit px by destructive or non-destructive tests. After the test data from another physical memory unit py is copied to physical memory unit px and a one-to-one re-mapping of physical memory units pi to virtual memory units vj is performed such that physical memory unit py is left unmapped. The data in physical memory unit py is then tested and the steps of copying, one-to-one re-mapping and testing can be repeated until all physical memory units pi are tested. The testing can be performed with the aid of an MMU and it can involve more than one physical memory page at a time.

    摘要翻译： 一种在具有虚拟存储器的计算机系统和网络中进行在线RAM测试的方法。 该方法涉及识别物理存储器单元pi，i = 1的数量n。 。 。 n，并且虚拟存储器单元vj，j = 1的n-1个数。 。 。 n-1，在虚拟存储器中，执行一对一映射以将物理存储器单元pi映射到虚拟存储器单元vj，使得物理存储器单元px被未映射，然后在未映射的物理存储器单元中测试数据 px通过破坏性或非破坏性测试。 在来自另一物理存储器单元py的测试数据被复制到物理存储器单元px之后，并且执行物理存储器单元pi到虚拟存储器单元vj的一对一重新映射，使得物理存储器单元py被未映射。 然后测试物理存储器单元py中的数据，并且可以重复复制，一对一重映射和测试的步骤，直到所有物理存储器单元pi被测试。 可以借助MMU执行测试，并且可以一次涉及多个物理内存页面。