Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Patent
1997-08-29
2000-04-11
Lane, Jack A.
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
709213, 709216, G06F 1200
Patent
active
060498536
ABSTRACT:
For a multiprocessor computer having shared memory distributed across multiple nodes, a method and system for dynamically replicating data such as program text stored in memory on a first node to memory on a second node for use by a process executing on the second node. In response to a page fault generated by the process in accessing data, a determination is made whether the data is present in the memory of another node. If so, memory is allocated on the process's node for the data, and the needed data is copied from the other node to the process's node. The process's page table entry for the missing data is then modified to contain the physical address of the allocated memory, where the data is now stored. The method is implemented in a preferred embodiment by using novel data structures linked to the data structures that are typically created when a file is mapped to a process's virtual address space.
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Casper Corene
Kingsbury Brent A.
Krueger Phillip E.
Lane Jack A.
Sequent Computer Systems, Inc.
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