Cache partitioning method and device

Abstract

Disclosed are a Cache partitioning method and device, which relate to the field of electronic information technology, and can flexibly allocate physical memories and Cache Sets for executive entities, thereby reducing interference generated by a plurality of executive entities in the usage of a Cache and improving the performance of memory access. The method comprises: allocating, by an operating system, a physical memory to an executive entity (101); and selecting one or more unoccupied Cache Sets from Cache Sets included in a host, caching data from the physical memory allocated to the executive entity into the selected Cache Set, and establishing a correlation between the physical memory allocated to the executive entity and the selected Cache Set (102). The method is suitable for a scenario where an appropriate Cache Set is allocated to an executive entity.

Description

Technical field [0001] The present invention relates to the field of electronic information technology, and in particular to a method and device for Cache partitioning. Background technique [0002] In cloud computing and data center applications, in order to make full use of resources, there are often multiple execution entities in a single node, such as processes, virtual machines, or kernels in multi-core operating systems. The operating system needs to allocate physical memory to each execution entity. The Cache index method in the prior art determines the corresponding relationship between physical memory and Cache (high-speed buffer memory). After physical memory is allocated, it is equivalent to allocating Cache for the execution entity. When the execution entity is running, each execution entity will interfere with the use of the Cache. For example, a process frequently refreshes the Cache, which reduces the success rate of other processes accessing the Cache, resulting i...

AI Technical Summary

Problems solved by technology

[0003] However, in some work scenarios, such as startup scenarios or device direct memory access scenarios, the operating system needs to allocate continuous physical memory to the execution entity, and continuous physical memory often spans multiple different CacheSets, requiring continuous physical memory It is very likely that the execution entity shares the same one or more CacheSets with other execution entities. In this case, multiple execution entities will still interfere with the use of Cache, causing memory access delays, thereby reducing memory access performance.

Images