KR101639797B1 - Network interface apparatus and method for processing virtual machine packets - Google Patents
Network interface apparatus and method for processing virtual machine packets Download PDFInfo
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- KR101639797B1 KR101639797B1 KR1020150144474A KR20150144474A KR101639797B1 KR 101639797 B1 KR101639797 B1 KR 101639797B1 KR 1020150144474 A KR1020150144474 A KR 1020150144474A KR 20150144474 A KR20150144474 A KR 20150144474A KR 101639797 B1 KR101639797 B1 KR 101639797B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
- H04L47/6255—Queue scheduling characterised by scheduling criteria for service slots or service orders queue load conditions, e.g. longest queue first
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2483—Traffic characterised by specific attributes, e.g. priority or QoS involving identification of individual flows
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/29—Flow control; Congestion control using a combination of thresholds
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
- H04L47/627—Queue scheduling characterised by scheduling criteria for service slots or service orders policing
Abstract
Description
BACKGROUND OF THE
Recently, the amount of communication through the Internet has increased rapidly, and accordingly, the capacity and speed of servers have been rapidly increasing. On the other hand, virtualization of servers is being accelerated in order to solve the increase in physical volume due to the capacity increase of servers and cost reduction. It is essential to increase the efficiency of parallel processing of large amount of data including data packets generated in a virtualization environment received from a physical network in accordance with capacity increase, speed up, and virtualization of servers. When a virtual switch function is performed in a virtualization server, The load of the server according to the function of the virtual switch is transferred to the physical network interface device, and realization of the technology concept is required.
In the case of a NIC supporting a conventional virtualization environment, there is an attempt to reduce the bottleneck between the network interface device and the virtual switch of the server by creating and managing a queue on a virtual machine basis as a method of supporting the virtualization environment in the physical network interface device . However, in the conventional case, only the virtual machine unit is allocated for the processor allocation and the redistribution of the queue for the parallel processing of the received data packet. In other words, processor allocation is made considering only the physical layer of the virtualization environment. Therefore, processor affinity, which is one of the most important factors for improving the processing efficiency in parallel processing, can not be considered, and processor allocation and queue redistribution take place only considering the usage load of the processor. This can serve as a factor to reduce the efficiency of parallel processing.
It is an object of the present invention to provide a network interface device that increases the efficiency of parallel processing by processing a packet in units of virtual machine flows, guarantees QoS on a per-virtual machine flow basis, and distributes a load of a server in a virtual network environment, And to provide a packet processing method.
According to an aspect of the present invention, there is provided a network interface device connected to a server in which a plurality of virtual machines are implemented, the network interface device comprising: at least one processor; A plurality of queues to which the one or more processors and at least one queue are connected; A packet receiving unit for receiving a virtual machine packet to be transmitted to a virtual machine through a physical network; A packet analyzer for identifying a virtual machine flow of a virtual machine packet received from the packet receiver; A monitoring unit for monitoring status information including the load relating to the at least one processor and the plurality of queues; A queue manager for dividing the plurality of queues into a plurality of partitions according to the monitored result or dynamically generating a size and a number of the plurality of queues based on virtual environment information received from the plurality of virtual machines; And a scheduler for classifying the virtual machine packets into the identified virtual machine flow units and assigning the virtual machine packets to corresponding queues.
According to another aspect of the present invention, there is provided a method of processing a virtual machine packet for a plurality of virtual machines, the method comprising: receiving a virtual machine packet to be transmitted to a plurality of virtual machines via a physical network; ; Identifying a virtual machine flow of the received virtual machine packet; Monitoring status information including load distribution for one or more processors and a plurality of queues; Dividing the plurality of queues into a plurality of partitions according to the monitored result or dynamically generating a size and a number of the plurality of queues based on virtual environment information received from the plurality of virtual machines; And dividing the virtual machine packet into the identified virtual machine flow units and assigning the divided virtual machine packets to a corresponding queue.
According to the present invention, a load of a server having a virtualized environment including a plurality of virtual machines is reduced. In addition, by processing packets in units of virtual machine flow, the degree of affinity between the virtual machine packet and the processor is increased to improve the efficiency of parallel processing. In addition, the load of the virtual switch can be distributed to the network interface card to increase the efficiency of the virtual network processing. In addition, it is possible to implement a scalable communication process in which QoS of virtual machine flow units between end points of a virtual machine is ensured by performing queuing and processing in units of virtual machine flows.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a whole system including a network interface device according to the present invention;
2 is a diagram illustrating an example of a method of dynamically setting resources of a network interface apparatus according to the present invention.
3 is a diagram illustrating a configuration of an embodiment of a network interface apparatus according to the present invention,
FIG. 4 illustrates an example of a virtual machine flow-based queue allocation of a network interface apparatus according to the present invention.
5 is a diagram illustrating another example of a virtual machine flow-based queue allocation of a network interface apparatus according to the present invention.
6 is a diagram illustrating an example of a virtual machine packet used in the present invention,
7 is a flowchart illustrating an example of a packet processing method for a virtual network environment according to the present invention.
The conventional flow identification method analyzes the traffic attributes of all packets of the received packet and classifies them according to a predetermined network communication policy. For example, a flow can be classified according to a communication policy set as an element of attributes of a received packet, such as a transmission node address, a destination address, a session, and an application layer. A typical NIC identifies a flow by analyzing traffic characteristics of an upper layer of a packet received from the network, and parallelizes the identified flow through a multiprocessor. The NIC in the present invention can efficiently transmit packets generated in a virtual machine network environment to a destination virtual machine encapsulated in a normal network packet frame using a conventional technique such as various tunneling The flow is identified according to the virtualization environment network layer information so that it can be delivered, and the identified flow is processed in parallel through the multiple processors.
The virtualization environment network layer means a network layer formed of a virtual machine, and the virtualization environment network layer information means network layer information formed of a virtual machine encapsulated in a physical network frame for packet transmission in a network layer formed as a virtual machine . Hereinafter, the identified packet based on the virtual environment network layer information used in the present embodiment is referred to as a virtual machine packet. The virtual machine packet is recognized in the physical network by the general communication protocol and is encapsulated in the physical network frame so that smooth transmission can be achieved. Also, the flow classified by using the virtualization environment of the virtual machine packet, that is, the network layer information between the virtual machines, is called a virtual machine flow. The virtual machine flow is described as a flow of a service end created in a virtual machine in a communication service structure.
Hereinafter, a network interface apparatus and a packet processing method according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing a schematic structure of an entire system including a network interface device according to the present invention.
Referring to FIG. 1, a network interface device is implemented as a network interface card (NIC) 100. However, the network interface device is not necessarily limited to the
The
The NIC 100 analyzes the traffic characteristics of the upper layer in the virtualization environment with respect to the virtual machine packets received from the
The NIC 100 includes a plurality of queues and a plurality of processors for parallel processing of received virtual machine packets, and the size and number of queues are fixed or dynamically changed according to the server virtualization environment, .
2 is a diagram illustrating an example of a method for dynamically setting resources of a NIC according to the present invention
Referring to FIGS. 1 and 2, when the NIC 100 is attached to the
For example, when the NIC 100 receives the virtual environment information of four virtual machines from the
3 is a diagram showing a configuration of an embodiment of the NIC according to the present invention.
3, the NIC 100 includes a
The
The
The
In one embodiment, the
The
The
For example, when the new virtual machine packet is loaded into the
The plurality of
The
The plurality of
For example, the plurality of
As another example, a plurality of processors may be connected to a queue for each virtual machine. 4, the first processor is connected to the first to third queues allocated to the first virtual machine, the second processor is connected to the fourth to sixth queues allocated to the second virtual machine, The processor may be coupled to seventh and eighth queues allocated to the third virtual machine.
As another example, the first processor is associated with a fourth queue assigned to a second virtual machine with first to third queues allocated to the first virtual machine, wherein the second processor is allocated to the second virtual machine Lt; RTI ID = 0.0 > and / or < / RTI > That is, the processor may be coupled to all or a portion of the queues allocated to at least two or more virtual machines.
The
The
4 is a diagram illustrating an example of a virtual machine flow based queue allocation of a NIC according to the present invention.
Referring to FIG. 4, the
For example, in the case of identifying the virtual machine flows directed to the first virtual machine in accordance with the priority, the scheduler sets the priority of the virtual machine packets based on the priority in the first to
5 is a diagram illustrating another example of a virtual machine flow-based queue allocation of a NIC according to the present invention.
Referring to FIG. 5, the
For example, as shown in FIG. 3, when the load distribution of the queue measured by the monitoring unit falls below a predetermined threshold value during the scheduling performed by one scheduler, the redistribution of the queue or the processor reallocation may be determined. Or the statistical amount of virtual machine packets received from the network and the processor capability performed by the total processor in the NIC so that redistribution of the queues or processor reallocation can be determined if the load of the processor is below a certain threshold. When the queue is redistributed or the processor is reassigned, if the queue is divided into a plurality of partitions as shown in FIG. 5 and additional scheduler designation is required, a processor with the least load can be designated as an additional scheduler.
Caches belonging to each partition can be grouped 540 based on virtual machines and caches in
6 is a diagram showing an example of a virtual machine packet used in the present invention.
Referring to FIG. 6, a virtual machine packet includes a
The
The structure of the virtual machine packet shown in FIG. 6 is only one example for facilitating understanding of the present invention, and the present invention is not limited thereto, and various structures of virtual machine packets for a virtual network environment can be defined and used.
Also, the structure of the virtual machine packet stored in the memory and the structure of the virtual machine packet stored in the queue may be the same or different according to the embodiment. For example, various design changes can be made, such as changing the virtual machine packet of FIG. 6 received from the network to an optimal structure that can be processed in the virtualization environment, or deleting some or all unnecessary fields in the virtualization environment of the fields of the virtual machine packet And store them in a queue.
7 is a flowchart illustrating an example of a packet processing method for a virtual machine network environment according to the present invention.
7, when receiving a virtual machine packet (S700), the network device of the present invention analyzes a virtual machine packet through a DPI process or the like to identify a destination virtual machine and a virtual machine flow to which a virtual machine packet is to be delivered (S710). The network device of the present invention stores a virtual machine packet in a corresponding queue on a virtual machine flow basis for at least one or more queues assigned for each virtual machine (S720). Then, the network device of the present invention processes virtual machine packets stored in each queue through a plurality of processors and transmits them to the virtual machine (S730).
The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include various types of ROM, RAM, CDROM, magnetic tape, floppy disk, optical data storage, and the like. The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.
The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.
100: network interface card 110: network
120: server 130: connection slot
140: Virtual Switch 150: Virtual Machine
300: packet receiver 310: packet analyzer
320: memory 330: queue
340: Processor 350: Scheduler
360: Monitoring section 370: Queue management section
600: Data 610: Physical network frame
620: Tunneling 630: Virtual network frame
Claims (16)
One or more processors;
A plurality of queues to which the one or more processors and at least one queue are connected;
A packet receiving unit for receiving a virtual machine packet to be transmitted to a virtual machine through a physical network; And
And a packet analyzer for identifying a virtual machine flow of the virtual machine packet received from the packet receiver,
Wherein the virtual machine packet is encapsulated in a physical network frame to include traffic information in a virtual machine network environment,
The packet receiver decapsulates a physical network packet encapsulated in the virtual machine packet to remove a header part corresponding to the physical network, restores the virtual machine network frame, And identifies the virtual machine flow based on the information.
And a scheduler for dividing the virtual machine packets into the identified virtual machine flow units and assigning the virtual machine packets to corresponding queues.
Dividing the plurality of queues into a plurality of partitions according to state information including the load relating to the at least one processor and the plurality of queues or dividing the plurality of queues into a plurality of partitions based on virtual network environment information received from the plurality of virtual machines, And a queue manager for dynamically generating a size and a number of the network interface devices
Further comprising a flow table storing a mapping relationship between the virtual machine flow identified by the packet analysis unit and the plurality of queues,
The scheduler refers to the flow table for the received packet, and if there is no information about the virtual machine flow and the mapped queue of the received packet identified by the packet analyzing unit, the scheduler determines one of the queues allocated to the destination virtual machine And updates the flow table. The network interface apparatus according to claim 1,
Wherein the network interface device further comprises a monitoring unit for monitoring status information including the load on the one or more processors and the plurality of queues,
Wherein the scheduler calculates a load distribution of a queue measured by the monitoring unit is less than or equal to a predetermined threshold value or a quantity of virtual machine packets received from a network and a processor capability performed by an overall processor in the network interface apparatus, Lt; RTI ID = 0.0 > reassigning < / RTI &
Wherein the scheduler selects a processor with the smallest load among the plurality of processors identified by the monitoring unit as an additional scheduler, when a redistribution of a queue or an additional scheduler designation is required at the time of processor reallocation,
Wherein the selected processor halts an ongoing task and performs the ongoing task again after completing the operation as a scheduler.
Wherein the plurality of queues are divided into a plurality of queue groups including at least one queue for each virtual machine, and wherein the scheduler transmits, for a virtual machine packet, one of the plurality of queue groups based on a destination virtual machine of the virtual machine packet And allocates the queue in the selected queue group based on the virtual machine flow.
Receiving a virtual machine packet to be transmitted to a plurality of virtual machines via a physical network; And
Identifying a virtual machine flow of the received virtual machine packet,
Wherein the virtual machine packet is encapsulated in a physical network frame to include traffic information in a virtual machine network environment,
In the step of receiving the virtual machine packet, when receiving the encapsulated physical network packet, the virtual machine packet is decapsulated to remove a header part corresponding to the physical network, restoring the virtual machine network frame, Further comprising identifying virtual machine flows based on machine network layer information. ≪ RTI ID = 0.0 > 8. < / RTI >
And dividing the virtual machine packet into the identified virtual machine flow units and assigning the divided virtual machine packets to the corresponding queues. The virtual machine packet processing method for a plurality of virtual machines
Dividing the plurality of queues into a plurality of partitions according to state information including the load relating to the at least one processor and the plurality of queues or dividing the plurality of queues into a plurality of partitions based on virtual network environment information received from the plurality of virtual machines, The method comprising the steps of: dynamically generating a size and a number of virtual machine packets for a plurality of virtual machines
Wherein the step of identifying the virtual machine flow generates a flow table storing a mapping relationship between the identified virtual machine flow and the plurality of queues,
Wherein the step of allocating the virtual machine packet to the queue refers to the flow table for the received packet, and if there is no information about the virtual machine flow and the mapped queue of the received packet, one of the queues allocated to the destination virtual machine , And updates the flow table. The virtual machine packet processing method for a plurality of virtual machines
Further comprising the step of monitoring status information including the load on the one or more processors and the plurality of queues between identifying the virtual machine flow and allocating the virtual machine packet to a queue,
The monitoring step may calculate the load distribution of the monitored queue to be less than or equal to a predetermined threshold value or the amount of virtual machine packets received from the network and the processor capability performed by the total processor in the network interface device, And if it is equal to or less than the threshold value, reallocates the queue or reassigns the processor.
Wherein the scheduler selects a processor with the smallest load among the plurality of processors identified in the monitoring step as an additional scheduler when reallocation of a queue or designation of an additional scheduler at the time of processor reallocation is required in the monitoring step,
Wherein the selected processor halts an ongoing task and performs the ongoing task again after completing the operation as a scheduler.
Wherein the plurality of queues are divided into a plurality of queue groups including at least one queue for each virtual machine, a destination of the virtual machine packets is selected and allocated to one of the plurality of queue groups based on a virtual machine, And a queue in the selected queue group is allocated based on the machine flow. The virtual machine packet processing method for a plurality of virtual machines
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KR20180107706A (en) * | 2017-03-22 | 2018-10-02 | 정기웅 | Method and apparatus for processing packet using multi-core in hierarchical networks |
KR101998625B1 (en) * | 2018-01-24 | 2019-07-11 | 주식회사 오픈시스넷 | Load balancing method of session cluster |
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KR20180107706A (en) * | 2017-03-22 | 2018-10-02 | 정기웅 | Method and apparatus for processing packet using multi-core in hierarchical networks |
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