KR102462600B1 - Dynamic pass-through method and apparatus in virtualized system - Google Patents

Abstract

obtaining information on at least one hardware device; obtaining binding information on whether to use the at least one hardware device as a virtual device or a dynamic pass-through device from an administrator; and binding information A dynamic pass-through method in a virtual system comprising the step of individually connecting at least one hardware device to a virtual machine without virtualization and determining as a dynamic pass-through device, or connecting to a virtual machine through virtualization and determining as a virtual device is initiated. The present invention has an effect that the pass-through device can be used without system interruption.

Description

DYNAMIC PASS-THROUGH METHOD AND APPARATUS IN VIRTUALIZED SYSTEM

The present invention relates to a method and apparatus for dynamic pass-through, and more particularly, to a method and apparatus for dynamic pass-through in a virtualization system using a hypervisor.

Since a virtualization system uses hardware indirectly/shared through a kind of middleware called a hypervisor, there is always an issue of performance degradation compared to a non-virtualization system that uses hardware directly/non-shared. contains However, if the performance degradation is at a level that the application program can handle, the overall benefit will increase due to the increase in system utilization due to shared use.

In general non-real-time application environment, performance degradation is not a big problem, but for functions that require real-time such as modems and protocols of communication systems, performance degradation may affect the performance of functions. To solve this performance issue, the virtualization system allows a kind of exception method called pass-through. This is a means of minimizing performance degradation due to indirect/shared use of the hypervisor by directly connecting the hardware device with the software.

In order to use pass-through devices in the conventional virtualization system, the system must be restarted after declaring the target hardware as pass-through. Conversely, to use a pass-through device as a shared device, a restart procedure is required after redeclaration. In a virtualization system, since multiple virtual machines are generally accommodated and operated at the same time, restarting the system causes an abnormal situation in which all dependent virtual machines must be stopped and restarted. Therefore, pass-through devices and shared devices must be carefully selected and pre-determined at the installation stage of the system, and changes during system operation are virtually impossible. This is an obstacle to flexible use of system resources.

An object of the present invention to solve the above problems is to provide a dynamic pass-through method in a virtualization system.

Another object of the present invention for solving the above problems is to provide a dynamic pass-through device in a virtualization system.

A dynamic pass-through method according to an embodiment of the present invention for achieving the above object includes: obtaining information on at least one hardware device; determining whether to use at least one hardware device as a virtual device from an administrator; acquiring binding information on whether to use it as a dynamic pass-through) device and based on the binding information, individually connecting at least one hardware device to the virtual machine without virtualization to determine it as a dynamic pass-through device or to the virtual machine through virtualization It may include the step of determining as a virtual device by connecting.

A dynamic pass-through apparatus according to an embodiment of the present invention for achieving the above other object includes a processor and a memory in which at least one instruction executed through the processor is stored, and at least one instruction is may be executed to obtain information about at least one hardware device, and may be executed to obtain binding information on whether to use the at least one hardware device as a virtual device or a dynamic pass-through device from an administrator, , and binding information to individually connect at least one hardware device to a virtual machine without virtualization to determine it as a dynamic pass-through device, or to connect to a virtual machine through virtualization to determine it as a virtual device.

According to the present invention, hardware devices can be declared as pass-through devices or shared devices without restarting during system operation.

According to the present invention, it is possible to dynamically designate and connect a pass-through device or a shared device by a device binder.

According to the present invention, it is possible to increase the availability of the system and improve the flexibility of resource use by using the pass-through device without system interruption.

1 is a conceptual diagram of a dynamic pass-through method according to an embodiment of the present invention.
2 is a block diagram of a dynamic pass-through device according to an embodiment of the present invention.
3 is a block diagram illustrating a binding method by a hypervisor according to an embodiment of the present invention.
4 is a flowchart of a dynamic pass-through method according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals have been used for like elements.

Terms such as first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term "and/or" includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of a dynamic pass-through method according to an embodiment of the present invention.

A virtualized system may refer to a system in which an application program is operated to use a virtual resource abstracted by a hypervisor without directly using a hardware resource of the system. In such a virtualization system, since software is operated independent of hardware, portability is increased in software distribution and installation, flexibility is guaranteed in software reconfiguration, and hardware resources can be shared and used. Therefore, it is possible to increase the system utilization rate.

Since a virtualization system uses hardware indirectly/shared through a kind of middleware called a hypervisor, there is always an issue of performance degradation compared to a non-virtualization system that uses hardware directly/non-shared. contains

To solve this performance issue, the virtualization system may allow a kind of exception called pass-through. This may mean a means of minimizing performance degradation due to indirect/shared use of a hypervisor by directly connecting a hardware device with software.

In order to use pass-through devices in the conventional virtualization system, the system must be restarted after declaring the target hardware as pass-through. Conversely, to use a pass-through device as a shared device, a restart procedure is required after redeclaration. In a virtualization system, since multiple virtual machines are generally accommodated and operated at the same time, restarting the system causes an abnormal situation in which all dependent virtual machines must be stopped and restarted.

Accordingly, the present invention intends to propose a method of not requiring a system restart when declaring hardware devices in a virtualization system as a pass-through device or a shared device. In other words, according to the present invention, the properties of the hardware device may be dynamically changed during the operation of the system.

Referring to FIG. 1 , in a dynamic pass-through method according to an embodiment of the present invention, a plurality of hardware resources located below are abstracted to a hypervisor that operates to be viewed as a virtual resource. can be performed by A virtual resource may be used by a virtual function (VF) using an independent virtual machine located on top. Here, the hardware resource may be referred to as a hardware device, and the virtual resource may be referred to as a virtual device.

In other words, CPU to virtual CPU, storage to virtual storage, network to virtual network, peripheral component interconnect (PCI) or other devices that can be extended to other interfaces as virtual miscellaneous devices. can be abstracted or virtualized by

In an embodiment of the present invention, the pass-through device may be provided in the form of a dynamic pass-through device, and the dynamic pass-through device serves as a pseudo device for accessing a pass-through device to be dynamically defined during system operation. can be done

The dynamic pass-through method according to an embodiment of the present invention may bind a specific hardware resource to a dynamic pass-through device when abstracting or virtualizing a hardware resource into a virtual resource by a hypervisor.

Here, the dynamic pass-through device may exist in an undetermined state until binding with actual hardware occurs, and after binding is made, the attribute may be determined. A dynamic pass-through device bound to a specific hardware resource may not be shared and used by a plurality of virtual machines.

A method of binding a specific hardware resource and a dynamic pass-through device by the hypervisor will be described in detail later with reference to FIG. 3 .

2 is a block diagram of a dynamic pass-through device according to an embodiment of the present invention.

Referring to FIG. 2 , the dynamic pass-through device 200 according to an embodiment of the present invention may include at least one processor 210 , a memory 220 , and a storage device 230 .

The processor 210 may execute a program command stored in the memory 220 and/or the storage device 230 . The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to the present invention are performed. The memory 220 and the storage device 230 may be configured of a volatile storage medium and/or a non-volatile storage medium. For example, the memory 220 may be configured as a read only memory (ROM) and/or a random access memory (RAM).

The memory 220 may store at least one instruction executed through the processor 210 . The at least one command is a command for obtaining information on at least one hardware device, and obtaining binding information on whether to use the at least one hardware device as a virtual device or a dynamic pass-through device from an administrator. It may include a command for individually connecting at least one hardware device to a virtual machine without virtualization and determining as a dynamic pass-through device based on the command and binding information, or determining as a virtual device by connecting to a virtual machine through virtualization.

A more detailed description of the operation of the dynamic pass-through apparatus according to an embodiment of the present invention will be described later with reference to FIG. 3 .

3 is a block diagram illustrating a binding method by a hypervisor according to an embodiment of the present invention.

Referring to FIG. 3 , a hypervisor according to an embodiment of the present invention may include a device binder, a sharing supporting module, and a pass-through supporting module. .

The device binder may obtain information about all hardware resources, and may obtain binding information of hardware resources and dynamic pass-through devices from a virtual infrastructure manager. Here, the binding information may refer to information on whether a specific hardware resource is virtualized and operated as a virtual device or as a dynamic pass-through device without virtualization. may refer to.

Referring to FIG. 3 , a hardware resource may be represented as a first device, a second device, ..., an n-th device, and a virtual resource may be represented as a virtual device.

In other words, the device binder may acquire information on the first device, the second device, ..., the n-th device, and share each device with the sharing support module and pass-through based on the binding information obtained from the virtual infrastructure manager. It can be linked with the support module. Also, thereafter, new binding information may be acquired from the virtual infrastructure manager, and the connection may be dynamically changed during system operation.

For example, the first device, the third device, ..., the nth device may be connected to the sharing support module to operate as a virtual device according to the binding information, and the second device may be a dynamic pass-through device according to the binding information. It can be connected to a pass-through support module to operate as

The sharing support module may abstract or virtualize the connected device to allow the virtual machine to operate as a virtual device, and the pass-through support module may allow the connected device to operate as a dynamic pass-through device to the virtual machine without abstraction or virtualization.

For example, the first device, the third device, ..., the n-th device connected by the sharing support module may operate as a virtual device to the virtual machine through virtualization, and the second device connected by the pass-through support module may be virtualized. Without it, it can act as a dynamic pass-through device to the virtual machine.

4 is a flowchart of a dynamic pass-through method according to an embodiment of the present invention.

Referring to FIG. 4 , the dynamic pass-through device 200 according to an embodiment of the present invention may first acquire information on all hardware devices in the system ( S410 ), and convert it from a virtual infrastructure manager to a virtual device for each hardware device. Binding information on whether to use or to use as a dynamic pass-through device may be obtained (S420).

The following operations will be described with respect to one hardware device, and may be the same for other hardware devices.

The dynamic pass-through device 200 may determine whether the hardware device is used as the dynamic pass-through device based on the binding information (S430). If it is determined that the hardware device is used as the dynamic pass-through device, the hardware device passes It can be connected with the pass-through support module (S440), and the hardware device can be operated as a dynamic pass-through device for the virtual machine without virtualization by the pass-through support module (S450).

When it is determined that the hardware device is not used as the dynamic pass-through device, the dynamic pass-through device 200 may connect the hardware device as a sharing support module (S460) and virtualize the hardware device (S470). Also, the dynamic pass-through device 200 may operate the virtualized hardware device as a virtual device to the virtual machine (S480).

The operation according to the embodiment of the present invention can be implemented as a computer-readable program or code on a computer-readable recording medium. The computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored. In addition, the computer-readable recording medium may be distributed in a network-connected computer system to store and execute computer-readable programs or codes in a distributed manner.

In addition, the computer-readable recording medium may include a hardware device specially configured to store and execute program instructions, such as ROM, RAM, and flash memory. The program instructions may include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

Although some aspects of the invention have been described in the context of an apparatus, it may also represent a description according to a corresponding method, wherein a block or apparatus corresponds to a method step or feature of a method step. Similarly, aspects described in the context of a method may also represent a corresponding block or item or a corresponding device feature. Some or all of the method steps may be performed by (or using) a hardware device such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, one or more of the most important method steps may be performed by such an apparatus.

In embodiments, a programmable logic device (eg, a field programmable gate array) may be used to perform some or all of the functionality of the methods described herein. In embodiments, the field programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described herein. In general, the methods are preferably performed by some hardware device.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

200: dynamic pass-through device 210: processor
220: memory 230: storage device

Claims (10)

A dynamic pass-through method performed by a hypervisor, comprising:
obtaining information about at least one hardware device;
obtaining, from a manager, dynamically changeable binding information on whether to use the at least one hardware device as a virtual device or a dynamic pass-through device; and
When the binding information includes information using the at least one hardware device as the dynamic pass-through device, the at least one hardware device is individually abstracted or virtualized without the dynamic pass-through (dynamic pass-through) device. and binding to a pass-through device. The method according to claim 1,
When the binding information includes information using the at least one hardware device as the virtual device, the method further comprising abstracting or virtualizing the at least one hardware device and binding to the virtual device. . 3. The method according to claim 2,
after binding the at least one hardware device to the dynamic pass-through device individually without abstraction or virtualization,
and determining an attribute of the hardware device. The method according to claim 1,
The virtual device is
A dynamic pass-through method using at least one virtual machine located thereon by a virtual function (VF). 5. The method according to claim 4,
The dynamic pass-through device bound to the hardware device comprises:
A dynamic pass-through method in which shared use by a plurality of the virtual machines is not possible. a processor executed by a hypervisor; and
Comprising a memory (memory) in which at least one instruction executed through the processor is stored,
The at least one command is
instructions to obtain information about at least one hardware device;
instructions for obtaining dynamically changeable binding information on whether to use the at least one hardware device as a virtual device or a dynamic pass-through device from an administrator, and
When the binding information includes information using the at least one hardware device as the dynamic pass-through device, a command for individually binding the at least one hardware device without abstraction or virtualization. which is a dynamic pass-through device. 7. The method of claim 6,
When the binding information includes information using the at least one hardware device as the virtual device, the method further includes a command for binding the at least one hardware device to the virtual device by abstracting or virtualizing the at least one hardware device. Device. 8. The method of claim 7,
after the instruction to individually bind the at least one hardware device without abstraction or virtualization;
and instructions to determine an attribute of the hardware device. 7. The method of claim 6,
The virtual device is
A dynamic pass-through device using at least one virtual machine located thereon by a virtual function (VF). 10. The method of claim 9,
When the at least one hardware device is individually bound without abstraction or virtualization, shared use by a plurality of the virtual machines is impossible.

Images