CN109803016A - A kind of method and apparatus using virtual switch forwarding data packet - Google Patents
A kind of method and apparatus using virtual switch forwarding data packet Download PDFInfo
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- CN109803016A CN109803016A CN201910067497.1A CN201910067497A CN109803016A CN 109803016 A CN109803016 A CN 109803016A CN 201910067497 A CN201910067497 A CN 201910067497A CN 109803016 A CN109803016 A CN 109803016A
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Abstract
The invention discloses a kind of methods using virtual switch forwarding data packet, comprising steps of receiving the data packet using network interface card, and upload to Datapath；Detect the relative recording of the data packet in the buffer by the Datapath；Relative recording is not detected in the buffer in response to the Datapath, and the data packet is sent to the vswitchd of the user's space of the virtual switch using DPDK；The vswitchd searches for the destination port of the data packet and obtains the forward rule of the data packet, and the data packet is forwarded to respective virtual machine according to the forward rule.Method disclosed by the invention can promote the real-time of virtual switch.
Description
Technical field
The present invention relates to computer network fields, and in particular to it is a kind of using virtual switch forwarding data packet method and
Equipment.
Background technique
By the development of many years, cloud computing is gradually mature, and in entire cloud data center, network is that all devices are mutual
Join the key point of intercommunication, the performance of network can influence the operational efficiency of entire data center.Virtual machine is logical in cloud computing
OVS virtual machine interchanger and PERCOM peripheral communication are crossed, can be lost since virtualization itself is sexual, although virtual machine network bandwidth and reality
Physical hardware is identical, but network delay is still higher than physical hardware, and the real-time of network is relatively poor.In Industry Control or army
Requirement of real-time with field, network is very high, how to improve the real-time of virtual network, it has also become what current cloud computing was promoted
Key point.
Summary of the invention
In view of this, at least one aspect in order to overcome the above problem, the embodiment of the present invention propose a kind of using virtual
The method that interchanger forwards data packet, comprising steps of
The data packet is received using network interface card, and uploads to Datapath；
Detect the relative recording of the data packet in the buffer by the Datapath；
Relative recording is not detected in the buffer in response to the Datapath, is sent the data packet using DPDK
To the vswitchd of the user's space of the virtual switch；
The vswitchd searches for the destination port of the data packet and obtains the forward rule of the data packet, by institute
It states data packet and is forwarded to respective virtual machine according to the forward rule.
In some embodiments, the data packet is sent to the user's space of the virtual switch using DPDK
Vswitchd, which includes: the DPDK, handles data packet using poll pattern in user's space.
In some embodiments, the data packet is forwarded according to the forward rule and includes:
The data packet is forwarded to the kernel spacing of the virtual machine using vhost-user.
In some embodiments, the method also includes steps:
The virtual machine receives the data packet using Microsoft Loopback Adapter, and is forwarded to the kernel spacing of virtual machine.
In some embodiments, the method also includes steps:
The virtual machine receives the data packet using physical network card；
The data packet is forwarded to virtio Microsoft Loopback Adapter by Linux Bridge and Tap by the physical network card；
The data packet is forwarded to the kernel spacing of virtual machine by the virtio Microsoft Loopback Adapter.
In some embodiments, the destination port of data packet described in described search and obtain the data packet forwarding rule
Then include:
Using openflow flow table, realize that the main modular is interacted with ovsdb and ovs-ofctl, so that described
Vswitchd searches for the destination port of the data packet and obtains the forward rule of the data packet.
In some embodiments, the method also includes steps:
In the virtual machine, control plane thread and each data surface thread are bound into different CPU.
In some embodiments, the method also includes steps:
Using send and receive packets batch facility, multiple data packets are focused on into a cache line.
Based on the same inventive concept, according to another aspect of the present invention, the embodiments of the present invention also provide a kind of meters
Calculate machine equipment, comprising:
At least one processor；And
Memory, the memory are stored with the computer program that can be run on the processor, and the processor is held
The step of any method that data packet is forwarded using virtual switch as described above is executed when row described program.
Based on the same inventive concept, according to another aspect of the present invention, the embodiments of the present invention also provide a kind of meters
Calculation machine readable storage medium storing program for executing, the computer-readable recording medium storage have computer program, and the computer program is processed
The step of any method that data packet is forwarded using virtual switch as described above is executed when device executes.
The present invention has following advantageous effects: method disclosed by the invention can promote the real-time of virtual switch
Property.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other embodiments are obtained according to these attached drawings.
Fig. 1 is the method flow schematic diagram that data packet is forwarded using virtual switch that the embodiment of the present invention provides；
Fig. 2 is OVS+DPDK data flow process figure；
Fig. 3 is vhost-user mode Principle of Communication figure；
Fig. 4 is dpdk-virtio-net mode Principle of Communication figure；
Fig. 5 is the structural schematic diagram for the computer equipment that the embodiment of the present invention provides；
Fig. 6 is the structural schematic diagram for the computer readable storage medium that the embodiment of the present invention provides.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
The embodiment of the present invention is further described in attached drawing.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
According to an aspect of the present invention, the embodiment of the present invention proposes a kind of utilization virtual switch forwarding data packet
Method, network data processing performance and handling capacity mainly can be greatly improved using data plane development kit (DPDK), because
In conjunction with virtualization technology, the real-time of virtual network can be greatly improved by it in this.
DPDK (Data Plane Development Kit) is developed by 6WIND, Intel Deng Duo company, main base
It runs, gathers for the function library of rapid data packet processing and driving, DPDK has used poll (polling) in linux system
Rather than it interrupts to handle data packet.When receiving data packet, the trawl performance through DPDK heavy duty will not pass through interrupt notification
CPU, but data packet is directly stored in memory, delivery application layer software is directly handled by the interface that DPDK is provided, in this way
Save a large amount of CPU break period and memory copying time.
The method using virtual switch forwarding data packet provided below with reference to Fig. 1 the present invention will be described in detail embodiment.
As shown in Figure 1, it may include step that the embodiment of the present invention, which is provided using the method for virtual switch forwarding data packet:
The data packet is received using network interface card, and uploads to Datapath；The data are detected in the buffer by the Datapath
The relative recording of packet；Relative recording is not detected in the buffer in response to the Datapath, using DPDK by the data
Packet is sent to the vswitchd of the user's space of the virtual switch；The vswitchd searches for the destination of the data packet
Mouth and the forward rule for obtaining the data packet, are forwarded to respective virtual machine according to the forward rule for the data packet.
Specifically, using big caching of page to support to come as shown in Fig. 2, big caching of page can be configured in Linux system first
Improve internal storage access efficiency.Using UIO technology, the support of driver under application space is provided, that is to say, that trawl performance is
User's space is operated in, reduces message in the multiple copy of user's space and application space.It is special using linux compatibility
Control upper thread journey and each data surface thread, be tied to different CPU cores by property, is saved thread and is adjusted back in each CPU core
Degree.Using no lock ring shape cache management, accelerate internal storage access efficiency.Using send and receive packets batch facility, multiple send and receive packets are concentrated
It to a cache line, is realized in memory pool, without applying repeatedly and discharging.It is driven, can be subtracted using User space poll
Small context handover overhead facilitates and realizes virtual machine and host zero-copy.
In some embodiments, as shown in Fig. 2, after being optimized using DPDK, OVS all work is all complete in User space
At, make virtual switch to physical network card entire data transmission all work in User space, be greatly improved the performance of OVS.
It after data packet reaches network interface card, is uploaded to data channel (Datapath), whether Datapath can check the accurate flow table in caching
This packet can be directly forwarded, if not finding record in the buffer, user's sky is directly transmitted data to by DPDKlib
Between main modular (vswitchd), vswitchd checks that database to check the destination port of data packet, needs to operate
Openflow flow table, realization are interacted with ovsdb and ovs-ofctl, after obtaining data packet precise relay rule, are carried out by rule
Data packet forwarding.After above-mentioned optimization, the real-time of OVS virtual switch can be allowed to be improved significantly.
In some embodiments, it as shown in figure 3, in order to preferably promote the networked-induced delay of virtual machine, not only to be promoted
The real-time of OVS virtual switch will also promote the real-time of Microsoft Loopback Adapter, in conjunction with the advantage of vhost-user technology, utilize
User space vhost-backend program, forwards the packet to the kernel spacing of virtual machine, in this way from virtual machine to physical machine on
It realizes supporting data zero-copy technique (zero copy), significantly reduces the data exchange time of virtual machine and physical machine, improve Microsoft Loopback Adapter
Real-time.
In some embodiments, as shown in figure 4, in order to advanced optimize the real-time of Microsoft Loopback Adapter, virtual machine can benefit
The data packet is received with Microsoft Loopback Adapter, and is forwarded to the kernel spacing of virtual machine, it can network interface card virtualization technology is utilized, it will
The virtual functions of physical network card, map directly in virtual machine and use, and in virtual machine by the way of DPDK, directly carry out
The network optimization of virtual machine realizes that virtual machine network is directly connected to the function of external network.
In some embodiments, it if physical network card does not have the hardware of virtual functions, directlys adopt DPDK and carries out system optimization,
Physical network card received data packet is utilized, then passes through Linux Bridge and Tap for the data packet using physical network card
It is forwarded to virtio Microsoft Loopback Adapter, the kernel that the data packet is finally forwarded to virtual machine using virtio Microsoft Loopback Adapter is empty
Between, the switching time of kernel and user's space is reduced in this way, also be can achieve and is promoted Microsoft Loopback Adapter real-time purpose.
OVS is transformed by the realization principle of DPDK in method proposed by the present invention using virtual switch forwarding data packet
Virtual switch, allows OVS virtual switch that the acceleration means of DPDK can be used, and User space process directly adapter tube network interface card receives and dispatches number
According to using " IO monopolizes core " technology, i.e., each one core of port assignment replaces dedicated for data transmit-receive, polling type processing mode
Interrupt processing, significantly improves IO performance.While the real-time in order to guarantee network in virtual machine, need to be transformed the net of virtual machine
Card driving is optimized using virtio network interface card, and using DPDK, and the content that will need to handle in kernel originally all mentions use
Family space reduces interruption and the time loss of data copy, improves the real-time of network.
Based on the same inventive concept, according to another aspect of the present invention, as shown in figure 5, the embodiment of the present invention also mentions
Supply a kind of computer equipment 501, comprising:
At least one processor 520；And
Memory 510, memory 510 are stored with the computer program 511 that can be run on a processor, and processor 520 is held
The step of any method that data packet is forwarded using virtual switch as above is executed when line program.
Based on the same inventive concept, according to another aspect of the present invention, as shown in fig. 6, the embodiment of the present invention also mentions
A kind of computer readable storage medium 601 is supplied, computer readable storage medium 601 is stored with computer program 610, computer
The step of any method that data packet is forwarded using virtual switch as above is executed when program 610 is executed by processor.
Finally, it should be noted that those of ordinary skill in the art will appreciate that realizing the whole in above-described embodiment method
Or part process, related hardware can be instructed to complete by computer program, program to can be stored in one computer-readable
It takes in storage medium, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, storage medium
It can be magnetic disk, CD, read-only memory (ROM) or random access memory (RAM) etc..The implementation of above-mentioned computer program
Example, can achieve the identical or similar effect of corresponding aforementioned any means embodiment.
In addition, typically, device disclosed by the embodiments of the present invention, equipment etc. can be various electric terminal equipments, such as hand
Machine, personal digital assistant (PDA), tablet computer (PAD), smart television etc., are also possible to large-scale terminal device, such as server
Deng, therefore protection scope disclosed by the embodiments of the present invention should not limit as certain certain types of device, equipment.The present invention is implemented
Client disclosed in example, which can be, is applied to any one of the above electricity with the combining form of electronic hardware, computer software or both
In sub- terminal device.
In addition, disclosed method is also implemented as the computer program executed by CPU according to embodiments of the present invention, it should
Computer program may be stored in a computer readable storage medium.When the computer program is executed by CPU, the present invention is executed
The above-mentioned function of being limited in method disclosed in embodiment.
In addition, above method step and system unit also can use controller and for storing so that controller is real
The computer readable storage medium of the computer program of existing above-mentioned steps or Elementary Function is realized.
In addition, it should be appreciated that the computer readable storage medium (for example, memory) of this paper can be volatibility and deposit
Reservoir or nonvolatile memory, or may include both volatile memory and nonvolatile memory.As an example and
Unrestricted, nonvolatile memory may include read-only memory (ROM), programming ROM (PROM), electrically programmable ROM
(EPROM), electrically erasable programmable ROM (EEPROM) or flash memory.Volatile memory may include that arbitrary access is deposited
Reservoir (RAM), the RAM can serve as external cache.As an example and not restrictive, RAM can be with a variety of
Form obtains, such as synchronous random access memory (DRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate SDRAM (DDR
SDRAM), enhance SDRAM (ESDRAM), synchronization link DRAM (SLDRAM) and directly Rambus RAM (DRRAM).Institute is public
The storage equipment for the aspect opened is intended to the memory of including but not limited to these and other suitable type.
Those skilled in the art will also understand is that, various illustrative logical blocks, mould in conjunction with described in disclosure herein
Block, circuit and algorithm steps may be implemented as the combination of electronic hardware, computer software or both.It is hard in order to clearly demonstrate
This interchangeability of part and software, with regard to various exemplary components, square, module, circuit and step function to its into
General description is gone.This function is implemented as software and is also implemented as hardware depending on concrete application and application
To the design constraint of whole system.The function that those skilled in the art can realize in various ways for every kind of concrete application
Can, but this realization decision should not be interpreted as causing a departure from range disclosed by the embodiments of the present invention.
Various illustrative logical blocks, module and circuit, which can use, in conjunction with described in disclosure herein is designed to
The following component of function here is executed to realize or execute: general processor, digital signal processor (DSP), dedicated integrated electricity
It is road (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete
Any combination of hardware component or these components.General processor can be microprocessor, but alternatively, processor can
To be any conventional processors, controller, microcontroller or state machine.Processor also may be implemented as calculating the group of equipment
Close, for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors combination DSP and/or it is any its
Its this configuration.
The step of method in conjunction with described in disclosure herein or algorithm, can be directly contained in hardware, be held by processor
In capable software module or in combination of the two.Software module may reside within RAM memory, flash memory, ROM storage
Device, eprom memory, eeprom memory, register, hard disk, removable disk, CD-ROM or known in the art it is any its
In the storage medium of its form.Illustrative storage medium is coupled to processor, enables a processor to from the storage medium
Information is written to the storage medium in middle reading information.In an alternative, storage medium can be integral to the processor
Together.Pocessor and storage media may reside in ASIC.ASIC may reside in user terminal.In an alternative
In, it is resident in the user terminal that pocessor and storage media can be used as discrete assembly.
In one or more exemplary designs, function can be realized in hardware, software, firmware or any combination thereof.
If realized in software, can using function as one or more instruction or code may be stored on the computer-readable medium or
It is transmitted by computer-readable medium.Computer-readable medium includes computer storage media and communication media, which is situated between
Matter includes any medium for helping for computer program to be transmitted to another position from a position.Storage medium can be energy
Any usable medium being enough accessed by a general purpose or special purpose computer.As an example and not restrictive, the computer-readable medium
It may include that RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage equipment or other magnetic storages are set
It is standby, or can be used for carrying or storage form be instruct or the required program code of data structure and can by general or
Special purpose computer or any other medium of general or specialized processor access.In addition, any connection can suitably claim
For computer-readable medium.For example, if using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or all
It is if the wireless technology of infrared ray, radio and microwave to send software from website, server or other remote sources, then above-mentioned coaxial
Cable, fiber optic cable, twisted pair, DSL or such as wireless technology of infrared ray, radio and microwave are included in determining for medium
Justice.As used herein, disk and CD include compact disk (CD), it is laser disk, CD, digital versatile disc (DVD), soft
Disk, Blu-ray disc, wherein disk usually magnetically reproduce data, and CD using laser optics reproduce data.Above content
Combination should also be as being included in the range of computer-readable medium.
It is exemplary embodiment disclosed by the invention above, it should be noted that in the sheet limited without departing substantially from claim
Under the premise of inventive embodiments scope of disclosure, it may be many modifications and modify.According to open embodiment described herein
The function of claim to a method, step and/or movement be not required to the execution of any particular order.In addition, although the present invention is implemented
Element disclosed in example can be described or be required in the form of individual, but be unless explicitly limited odd number, it is understood that be multiple.
It should be understood that it is used in the present context, unless the context clearly supports exceptions, singular " one
It is a " it is intended to also include plural form.It is to be further understood that "and/or" used herein refers to including one or one
Any and all possible combinations of a above project listed in association.
It is for illustration only that the embodiments of the present invention disclose embodiment sequence number, does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that range disclosed by the embodiments of the present invention (including claim) is limited to these examples；In the think of of the embodiment of the present invention
Under road, it can also be combined between the technical characteristic in above embodiments or different embodiments, and exist as described above
Many other variations of the different aspect of the embodiment of the present invention, for simplicity, they are not provided in details.Therefore, all at this
Within the spirit and principle of inventive embodiments, any omission, modification, equivalent replacement, improvement for being made etc. should be included in this hair
Within the protection scope of bright embodiment.
Claims (10)
1. a kind of method using virtual switch forwarding data packet, comprising steps of
The data packet is received using network interface card, and uploads to Datapath；
Detect the relative recording of the data packet in the buffer by the Datapath；
Relative recording is not detected in the buffer in response to the Datapath, and the data packet is sent to institute using DPDK
State the vswitchd of the user's space of virtual switch；
The vswitchd searches for the destination port of the data packet and obtains the forward rule of the data packet, by the number
Respective virtual machine is forwarded to according to the forward rule according to packet.
2. the method as described in claim 1, which is characterized in that the data packet is sent to the virtual switch using DPDK
The vswitchd of the user's space of machine, which includes: the DPDK, handles data packet using poll pattern in user's space.
3. the method as described in claim 1, which is characterized in that the data packet is forwarded packet according to the forward rule
It includes:
The data packet is forwarded to the kernel spacing of the virtual machine using vhost-user.
4. method as claimed in claim 3, which is characterized in that the method also includes steps:
The virtual machine receives the data packet using Microsoft Loopback Adapter, and is forwarded to the kernel spacing of virtual machine.
5. method as claimed in claim 3, which is characterized in that the method also includes steps:
The virtual machine receives the data packet using physical network card；
The data packet is forwarded to virtio Microsoft Loopback Adapter by Linux Bridge and Tap by the physical network card；
The data packet is forwarded to the kernel spacing of virtual machine by the virtio Microsoft Loopback Adapter.
6. the method as described in claim 1, which is characterized in that described in the destination port of data packet described in described search and acquisition
The forward rule of data packet includes:
Using openflow flow table, realize that the main modular is interacted with ovsdb and ovs-ofctl, so that described
Vswitchd searches for the destination port of the data packet and obtains the forward rule of the data packet.
7. the method as described in claim 1, which is characterized in that the method also includes steps:
In the virtual machine, control plane thread and each data surface thread are bound into different CPU.
8. the method for claim 7, which is characterized in that the method also includes steps:
Using send and receive packets batch facility, multiple data packets are focused on into a cache line.
9. a kind of computer equipment, comprising:
At least one processor；And
Memory, the memory are stored with the computer program that can be run on the processor, which is characterized in that the place
Manage the method executed as described in claim 1-8 any one when device executes described program.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In perform claim requires method described in 1-8 any one when the computer program is executed by processor.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110874336A (en) * | 2019-10-21 | 2020-03-10 | 无锡江南计算技术研究所 | Distributed block storage low-delay control method and system based on Shenwei platform |
| CN111131037A (en) * | 2019-12-27 | 2020-05-08 | 网易（杭州）网络有限公司 | Data transmission method, device, medium and electronic equipment based on virtual gateway |
| CN111211999A (en) * | 2019-11-28 | 2020-05-29 | 中国船舶工业系统工程研究院 | OVS-based real-time virtual network implementation method |
| CN112543137A (en) * | 2020-11-30 | 2021-03-23 | 中国电子科技集团公司第五十四研究所 | Virtual machine network acceleration system based on semi-virtualization and OVS-DPDK |
| CN113132349A (en) * | 2021-03-12 | 2021-07-16 | 中国科学院信息工程研究所 | Agent-free cloud platform virtual flow intrusion detection method and device |
| CN113630342A (en) * | 2021-06-25 | 2021-11-09 | 济南浪潮数据技术有限公司 | Forwarding table management method, system and device of virtual switch |
| CN114697215A (en) * | 2022-03-31 | 2022-07-01 | 西安超越申泰信息科技有限公司 | Method, system, equipment and medium for improving performance of virtualization network |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110874336A (en) * | 2019-10-21 | 2020-03-10 | 无锡江南计算技术研究所 | Distributed block storage low-delay control method and system based on Shenwei platform |
| CN111211999A (en) * | 2019-11-28 | 2020-05-29 | 中国船舶工业系统工程研究院 | OVS-based real-time virtual network implementation method |
| CN111131037A (en) * | 2019-12-27 | 2020-05-08 | 网易（杭州）网络有限公司 | Data transmission method, device, medium and electronic equipment based on virtual gateway |
| CN112543137A (en) * | 2020-11-30 | 2021-03-23 | 中国电子科技集团公司第五十四研究所 | Virtual machine network acceleration system based on semi-virtualization and OVS-DPDK |
| CN113132349A (en) * | 2021-03-12 | 2021-07-16 | 中国科学院信息工程研究所 | Agent-free cloud platform virtual flow intrusion detection method and device |
| CN113630342A (en) * | 2021-06-25 | 2021-11-09 | 济南浪潮数据技术有限公司 | Forwarding table management method, system and device of virtual switch |
| CN113630342B (en) * | 2021-06-25 | 2023-08-15 | 济南浪潮数据技术有限公司 | Forwarding table management method, system and device of virtual switch |
| CN114697215A (en) * | 2022-03-31 | 2022-07-01 | 西安超越申泰信息科技有限公司 | Method, system, equipment and medium for improving performance of virtualization network |
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Application publication date: 20190524 |