Page hot degree based heterogeneous memory management method

Abstract

The invention discloses a page hot degree based heterogeneous memory management method. The page hot degree based heterogeneous memory management method is characterized by including the steps of (1), as for memory pages of a heterogeneous memory, collecting total accessed read-write data, partial accessed read-write data and recent accessed read-write data in the memory pages, and storing the read-write data in a multi-level queue to form a page access record queue; (2), determining page hot degree values and hot degree values according to the partial read-write data and the recent read-write data, and sequentially reserving N pages with page hot degree values, exceeding a preset hot degree threshold value, as hot pages and N pages with page cold degree values, exceeding a preset cold degree threshold value, as cold pages; (3), selecting one optional cold page to be combined with each hot page, estimating energy-saving values, sequencing the energy-saving values in a descending sequence, selecting the cold and hot pages to be matched, and migrating the pages according to match results so as to reduce energy consumption. By the aid of the page hot degree based heterogeneous memory management method, high performance of a dynamic random access memory can be used fully, and overall performance of a heterogeneous memory system can be improved.

Description

technical field [0001] The invention belongs to the field of computer memory management, and more specifically relates to a heterogeneous memory management method based on page heat. Background technique [0002] With the rapid development of science and technology, the structure of modern computers is becoming more and more complex, and the energy consumption is also increasing. Memory is an important part of the computer system structure. It accounts for an increasing proportion of machine energy consumption. Reducing the energy consumption of the memory part has become a research hotspot. [0003] In the traditional computer system structure, the memory is composed of dynamic random access memory (DRAM), which is a kind of volatile memory, which needs to be refreshed periodically to ensure the accuracy of data, which increases the energy consumption of the system. Recently, a new type of storage device—phase-change memory (PCM) has emerged, which is a non-volatile stora...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a heterogeneous memory management method based on page heat, the purpose of which is to solve the problem of heterogeneous memory by screening hot and cold pages and reasonably migrating them in heterogeneous memory. Technical issues with high energy consumption

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