Coroutine-based asynchronous system calling system

Abstract

The invention discloses a coroutine-based asynchronous system calling system, which comprises a recording module, an execution module and a return module; a calling queue is arranged between the recording module and the execution module, and a return queue is arranged between the execution module and the return module; the recording module is used for receiving a system call request initiated by acoroutine, recording system call parameters and coroutine information contained in the system call request, storing the system call parameters and the coroutine information into a call alignment, pausing the coroutine initiating system call, and then judging whether to execute system call or not; the execution module is used for executing the system call transmitted by the call queue by adoptingan auxiliary thread, and storing a system call return value and cothread information into the return queue after the system call is executed; and the return module is used for reading the system callreturn value from the return queue and adding the coroutine to the running queue according to the coroutine information so as to recover coroutine running. The asynchronous execution problem of systemcalling based on the coroutine is solved.

Description

technical field [0001] The invention belongs to the field of operating systems, and in particular relates to an asynchronous system call system based on coroutines. Background technique [0002] As the interface between the application program and the operating system, the system call is the main way for the operating system to provide services to the application program. Common operating systems provide hundreds of different system calls, which provide functions necessary for program operation such as process management, memory management, file reading and writing, and network management. [0003] Although modern processors provide various functions to speed up the execution of system calls, the overhead of system calls is still not negligible. For programs that require a large number of system calls, such as databases and network servers, the operating efficiency of the system calls has a significant impact on the performance of the computer system. The operating system ...

AI Technical Summary

Problems solved by technology

[0006] Problem 1: Coroutine scheduling is not supported

[0007] Question 2: The Linux kernel version 2.6 or above is not supported

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