A method and device for reducing CPU resource consumption by using huge page mapping

Abstract

Disclosed are a method and apparatus for reducing CPU resource consumption using giant page mapping, the method comprising: generating a giant page mapping table recording a mapping relationship from a virtual address to a physical address for each system process (S101); when a system process accesses some virtual address, if a page miss procedure occurs, searching in the giant page mapping table, and after obtaining the mapping relationship from the virtual address to the physical address, loading the mapping relationship into a translation lookaside buffer (TLB) entry (S102). Giant page mapping some segment of memory greatly reduces the requirement for the number of TLBs, making the TLB self-carried in a memory management unit of a common CPU capable of mapping very large memory space and making a service processing process generate no TLB MISS abnormality after achieving a stable state in a short time during the operation, thus greatly improving performance, and thus can not only use the powerful functions provided by an operating system, but also improve system performance so that it is capable of processing large traffic communication.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for reducing CPU resource consumption by using huge page mapping. Background technique [0002] Currently, the Linux operating system is widely used in embedded fields, such as data communication, medical equipment, industrial control and other fields. With the continuous growth of demand, more and more powerful processors are used in these fields, and multi-core processors are more and more widely used, playing more and more roles in various industries. [0003] However, in some application fields that require high performance, such as data communication, media processing, etc., there are extremely high requirements for performance; while Linux provides powerful memory management functions, it also brings an unavoidable disadvantage:( Segment) The performance degradation caused by TLB (Translation Lookaside Buffer) switching caused by page memory managemen...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for reducing CPU resource consumption by using huge page mapping, to solve the problem in the prior art that CPU resources are consumed in large quantities due to TLB MISS exceptions.

Images