Adaptive memory management method for coupled memory multiprocessor systems
March 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBalancing data-processing work loads Method for dynamically allocating LRU/MRU managed memory among concurrent sequential processes Access control method for multiprocessor systems Plurality of processors where access to the common memory requires only a single clock interval Load balancing in a multiunit system Method and apparatus for grouping asynchronous recording operations Managing data storage devices connected to a digital computer Managing data storage devices connected to a digital computer Multiprocessor memory management method Memory management system improving the efficiency of fork operations InventorsAssigneeApplicationNo. 674077 filed on 03/20/1991US Classes:711/170Memory configuringExaminersPrimary: Dixon, Joseph L.Assistant: Nguyen, Hiep T. Attorney, Agent or FirmInternational ClassG06F 013/14AbstractAn adaptive memory management method for coupled memory multiprocessor computer systems is disclosed. In a coupled memory multiprocessor system all the data and stack pages of processes assigned to individual multiprocessors are, preferably, located in a memory region coupled to the assigned processor. When this becomes impossible, some data and stack pages are assigned to global memory or memory regions coupled to other processors. The present invention is a method of making certain that the most referenced data and stack pages are located in the coupled memory of the processor to which a specific process is assigned and lesser referenced pages are located in global memory or the coupled memory region of other processors. This result is accomplished by sampling the memory references made by the processors of the computer system and causing the most recently referenced pages in each coupled memory region to be maintained at the head of an active page list. References to remote data and stack pages are stored in a remote page hash table. Remote pages are pages stored in global memory or in coupled memory other than the coupled memory of the processor to which the process owning the pages is assigned. Any remote data and stack pages referenced more frequently than pages stored in a processor's coupled memory region are transferred to the processor's coupled memory region. If a processor's coupled memory region is tight, pages are transferred from the processor's coupled memory region to global memory or to the coupled memory region of another processor.Other References
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