Inter-process communication method and device

Abstract

The embodiment of the invention provides an inter-process communication method and device, relates to the technical field of computers, and aims to realize reading of a message in the case that a receiving end does not need to enter or exit a kernel space, avoid the time expenditure for the receiving end to enter or exit the kernel space, save the response time of the message and meanwhile reduce the disturbance of cache of the receiving end. The method specifically comprises the following steps: establishing a communication channel between the transmitting end and the receiving end; entering the kernel space and writing a channel number and a first parameter of the communication channel into the kernel space; acquiring a shared page table of the receiving end according to the channel number of the communication channel; mapping the physical address of a memory page of the message to a continuous idle page table entry of the shared page table of the receiving end to obtain a new virtual address of the message; storing the new virtual address of the message and the first parameter in a message notification region of the receiving end so as to read the message by the receiving end according to the new virtual address. The method and the device are applied to inter-process communication.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a method and device for inter-process communication. Background technique [0002] A process is an instance of a program that is running on a computer, and there are corresponding communication requirements between different processes due to mutual cooperation. In operating system research, Interprocess Communication (IPC) is an important research topic, and improving the efficiency of IPC is particularly important to the performance of the entire operating system. Commonly used IPC methods include message transmission, shared memory, and zero copy. The traditional operating system is divided into macro-kernel and micro-kernel. In recent years, with the rapid development of semiconductor manufacturing technology, the main frequency of a single processor chip has gradually approached the limit. It is no longer possible to continue the calculation speed of the processor ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art based on the Barrelfish operating system's zero-copy scheme within the kernel and between kernels, in order to map the message memory into its own address space, the receiving end needs to enter and exit the kernel space, which will cause corresponding time overhead; at the same time, the receiving end needs to enter and exit the kernel space Kernel space can cause perturbation of the receiver cache

The zero-copy scheme in the kernel in the L4 system of the second-generation microkernel system, due to the use of synchronous IPC, makes programming not flexible enough; at the same time, the receiving end still needs to enter and exit the kernel space, and it is only applicable to single-kernel systems

Images