Atomic instruction simulation method of parallel multi-nuclear virtual machine and virtual machine device

Abstract

The invention discloses an atomic instruction simulation method of a parallel multi-nuclear virtual machine and a virtual machine device. The virtual machine establishes a plurality of CPU threads with the number equal to the number of central processing unit (CPU) cores according to the number of the cores of a target CPU. The atomic instruction simulation method includes that a first CUP thread in the plurality of CUP threads sends request waiting signals to other CPU threads; the other CUP threads receiving the request waiting signals are suspended at original executive addresses and return back to confirm signals; the first CPU thread receives confirmation signals of all the other CPU threads and then executes atomic memory accessing instructions; waiting canceling signals are sent to the suspended CUP threads located at the original executive addresses; and the CPU threads receiving the waiting canceling signals continue execution from the original executive addresses. The atomic instruction simulation method of the parallel multi-nuclear virtual machine and the virtual machine device has high generality and execution efficiency.

Description

technical field [0001] The invention relates to the technical field of virtual machines, in particular to an atomic instruction simulation method of a parallel multi-core virtual machine and a virtual machine device. Background technique [0002] A virtual machine (Virtual Machine) is a software system that simulates a hardware device. With the popularity of multi-core CPUs in recent years, virtual machines have also begun to increase the simulation function for multi-core CPUs. In the early days, the serial method was mainly used to simulate the operation of multi-core CPUs, that is, the virtual machine is a single process, which polls and schedules multiple CPUs in a time-sliced ​​manner at the micro level, and simulates the parallel behavior of multiple CPUs at the macro level. In open source virtual machine systems (such as Bochs, QEMU, Simple-scalar, etc.), multiple CPUs in the target system are simulated and executed in a serial method. This method is simple to imple...

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Problems solved by technology

The algorithm has various restrictions on the use environment, such as the need to provide additional storage space to save the descriptor (descriptor), must use special functions to read and write memory, etc., the versatility is limited

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