Xen virtual machine scheduling control method in multi-core environment

A technology of scheduling control and virtual machine monitor, applied in program control device, multi-program device, software emulation/interpretation/simulation, etc., can solve the problems of starvation of other tasks, drop of cache hit rate, frequent switching of virtual cpu, etc. Achieve the effect of reducing cache invalidation, reducing execution time slices, and reducing frequent switching overhead.

Active Publication Date: 2011-11-23
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The credit scheduling method is the default scheduling method in the xen virtual machine. For computing tasks, it can allocate CPU time to each virtual CPU fairly and efficiently. For io tasks, it will generate a certain amount of delay, and the existing The credit scheduling method always frequently switches virtual CPUs when processing io data distribution, causing virtual CPUs in domain0 to be switched out continuously, seriously affecting system performance
At the same time, with the development of computer systems,

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  • Xen virtual machine scheduling control method in multi-core environment
  • Xen virtual machine scheduling control method in multi-core environment
  • Xen virtual machine scheduling control method in multi-core environment

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[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037]The present invention proposes a xen virtual machine scheduling method under a multi-core architecture. The method aims at defects such as low execution efficiency and single application range of existing scheduling methods, and proposes a virtual machine scheduling method that can be efficiently executed in a complex environment. The specific process is as follows:

[0038] Step 1: Scheduling initialization, which is an operation that must be performed before the scheduling method can run, this step includes the following execution steps:

[0039] (1.1) Enumerate all logical cpus, divide logical cpus belonging to the same physical cpu and the same core number into a group, and the logical cpus in each group share the same scheduling time slice length, and then allocate and initialize each group share The data structure used to organize and maintain vi...

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Abstract

The invention provides an Xen virtual machine scheduling control method in multi-core environment. The method comprises the following steps: (I) carrying out scheduling initialization; (II) carrying out initialization of scheduling information statistics, namely monitoring the virtual CPU (central processing unit) in a management domain 0, and sending the monitoring result to a VMM (virtual machine monitor) in real time; (III) creating a virtual machine, allocating the virtual CPU, storing the virtual CPU to a red black tree of a corresponding CPU group according to the priority level and a credit value, and starting all timers set in the initialization stage; and (IV) scheduling the virtual machine. According to the invention, the time slice executed by a logic CPU in the group can be dynamically adjusted, the time consumed by the scheduling method in the execution process is effectively reduced, relatively short response time for the IO (input/output) task is realized, and the method adapts to any type with relatively high requirement on time.

Description

technical field [0001] The invention belongs to the direction of computer virtualization, in particular to a scheduling method under a multi-core architecture, and belongs to the technical field of computer operating systems and virtualization. Background technique [0002] At present, system virtualization technology is more and more widely used in enterprises. Virtualization technology mainly has two advantages of flexibility and high efficiency. Through virtualization technology, enterprises can quickly build basic IT facilities, such as operating systems, databases, Web servers, etc.; virtualization migration technology and dynamic adjustment technology for virtual machine hardware can meet the current server's demand for dynamic changes in hardware resources , thus greatly improving the flexibility of resource allocation such as hardware. Through virtualization technology, enterprises can improve the utilization rate of hardware and other resources, and use less hardwa...

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Application Information

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IPC IPC(8): G06F9/46G06F9/50G06F9/455
Inventor 曾令仿刘景宁冯丹张灿群李家祥
Owner HUAZHONG UNIV OF SCI & TECH
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