Dynamic compiling method and device

Abstract

The embodiment of the invention provides a dynamic compiling method and device. The dynamic compiling method comprises the following steps: when to-be-complied hotspot methods exist in a current compilation queue, obtaining the running speeds and the sizes of the to-be-complied hotspot methods in the current compilation queue; determining the priority levels of the to-be-complied hotspot methods according to the running speeds and the sizes of the to-be-complied hotspot methods; and scheduling the hotspot method with the highest priority level in the current compilation queue for compiling. According to the dynamic compiling method and device provided by the embodiment of the invention, the compiling throughput capacity can be greatly improved; and the response speed of a virtual machine is effectively improved.

Description

technical field [0001] The embodiment of the present invention relates to virtual machine technology, and in particular to a dynamic compilation method and device. Background technique [0002] A virtual machine (Virtual Machine, referred to as VM) refers to virtualizing a complete computer with complete hardware system functions and running in a completely isolated environment through software (or supplemented by a small amount of hardware support), and this virtual computer It also usually supports its own set of instructions, called the virtual machine instruction set. The virtual machine relies on the local physical machine, and simulates and executes the given virtual machine instruction sequence (that is, the target program) on the local machine through its execution engine. The execution engine of the virtual machine can be implemented by an interpreter. Because interpreters have the characteristics of high portability, low implementation cost, and small memory foot...

AI Technical Summary

Problems solved by technology

However, unlike static compilation such as traditional C / C++, the just-in-time compiler is dynamically compiled while the program is running, which introduces additional runtime overhead

If there are too many compiled methods, dynamic compilation will take up a lot of computer resources, which will affect the normal execution of the program and make the virtual machine less responsive to the outside world.

On the contrary, if there are too few methods compiled, most of the methods will be executed by the interpreter, causing the program to run very slowly

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