CN106375240B - Ethernet message forwarding method and system between a kind of Multi-netmouth - Google Patents
Ethernet message forwarding method and system between a kind of Multi-netmouth Download PDFInfo
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- CN106375240B CN106375240B CN201610827476.1A CN201610827476A CN106375240B CN 106375240 B CN106375240 B CN 106375240B CN 201610827476 A CN201610827476 A CN 201610827476A CN 106375240 B CN106375240 B CN 106375240B
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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
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Abstract
The invention discloses Ethernet message forwarding method and systems between a kind of Multi-netmouth, the method are as follows: A, to preset each network interface to receive message buffer number be first predetermined value, each memory for receiving message buffer and allocating 1600 bytes in advance, presetting each network interface and sending message buffer number is second predetermined value, sends message buffer and does not allocate memory in advance；B, the reception Ethernet packet network data packet task that oneself is created by each network interface, takes polling mode packet receiving；C, after network interface receives ether network packet, judge whether ether network packet needs to forward；D, when the ether network packet that judgement receives needs to forward, being given out a contract for a project by the network interface for calling needs to be forwarded to, function transmission is current to receive message buffer message, the mark of releasing memory is not needed to the currently transmitted message buffer setting of network interface that needs are forwarded to, zero memory application zero-copy of ether network packet forwards between realizing Multi-netmouth, is obviously improved system performance.
Description
Technical field
The present invention relates to ether network packets between network data retransmission technique field more particularly to a kind of Multi-netmouth to forward
Method and system.
Background technique
In field of data communication, the demand of big flow ether network packet forwarding is often encountered, how to promote processor and turn
Hair ability and system data handling capacity are the problem of system engineer will think deeply.
Traditional design pattern: after network interface A receiving, after actual needs is handled, message pointer is transmitted to network interface B and is sent
Function forwards, while applying for memory again to network interface A, and carry is on current BD.After network interface B is sent completely, it is responsible for releasing
Put memory.In addition, traditional network port driving all uses interrupt mode, although real-time is very strong, under big flow very frequently
Numerous interruption causes system call to increase, and kernel can also consume cpu resource.
Above method can be handled with confidence under general flow, but reach 50,000 or more in big flow packet receiving each second
When, then it will appear a large amount of packet losses, CPU usage superelevation, system becomes very unstable.Operation of the system in memory application and release
On consume too many cpu resource, at least apply each second release 50,000 times or more.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide ether network packets between a kind of Multi-netmouth
Retransmission method and system, it is intended to which the operation lifting system performance of memory application and release when by omitting message forwarding is realized more
The forwarding of zero memory application zero-copy of ether network packet between network interface.
In order to achieve the above object, the technical proposal for solving the technical problem of the invention is as follows:
Ethernet message forwarding method between a kind of Multi-netmouth, comprising the following steps:
A, presetting each network interface and receiving message buffer number is first predetermined value, and each reception message buffer is pre-
The memory for first distributing 1600 bytes, presetting each network interface and sending message buffer number is second predetermined value, each transmission
Message buffer does not allocate memory in advance；
B, the reception Ethernet packet network data packet task that oneself is created by each network interface, takes polling mode to receive
Packet；
C, after network interface receives ether network packet, judge whether ether network packet needs to forward；
D, when the ether network packet that receives of judgement needs to forward, the network interface being forwarded to is needed to give out a contract for a project letter by calling
Number sends current reception message buffer message, and the currently transmitted message buffer setting of the network interface being forwarded to needs is not required to
Want the mark of releasing memory.
Ethernet message forwarding method between the Multi-netmouth, wherein further include step E: when judging what network interface received
When ether network packet does not need forwarding, then the memory where the ether network packet that memory substitution receives is redistributed, and will be described
Ether network packet memory is transferred to the processing of upper-layer protocol stack.
Ethernet message forwarding method between the Multi-netmouth, wherein step B specifically:
Each network interface receives message buffer pointer and whether to receive message buffer using polling mode, real-time query
Message is received, if there is receiving message, then inquires next reception message buffer, while modifying reception message buffer and referring to
Needle.
Ethernet message forwarding method between the Multi-netmouth, wherein step C specifically: when network interface receives Ethernet
After message, judge whether to meet specific transactions, if it is, needing to forward, does not otherwise need to forward.
Ethernet message forwarding method between the Multi-netmouth, wherein step D further include: the net of forwarding ether network packet
The network interface that mouthful packet receiving task call is forwarded to give out a contract for a project function when, first determining whether to give out a contract for a project by function of giving out a contract for a project, to send message slow for network interface
It rushes whether area has memory pointer saving when the last round of transmission of preservation, needing to discharge, if so, then discharging, and saves current
The memory and release mark of transmission.
Ethernet message forwarding system between a kind of Multi-netmouth, comprising:
Module is pre-seted, is first predetermined value, Mei Gejie for presetting each network interface to receive message buffer number
The memory that message buffer allocates 1600 bytes in advance is received, presetting each network interface and sending message buffer number is second pre-
Definite value sends message buffer and does not allocate memory in advance；
Packet receiving module is taken for creating oneself reception Ethernet packet network data packet task by each network interface
Polling mode packet receiving；
Judgment module, for judging whether ether network packet needs to forward after network interface receives ether network packet；
Forwarding module when the ether network packet for receiving when judgement needs to forward, needs to be forwarded to by calling
Network interface give out a contract for a project function send it is current receive message buffer message, and the currently transmitted message of network interface being forwarded to needs is slow
Rush the mark that area's setting does not need releasing memory.
Ethernet message forwarding system between the Multi-netmouth, wherein further include:
Protocol stack processing module, for when the ether network packet for judging that network interface receives does not need forwarding, then dividing again
Memory where the ether network packet received with memory substitution, and the ether network packet memory is transferred at upper-layer protocol stack
Reason.
Ethernet message forwarding system between the Multi-netmouth, wherein packet receiving module specifically: each network interface receives message
Buffer pointer receives whether message buffer has received message using polling mode, real-time query, if there is receiving message,
Next reception message buffer is then inquired, while modifying and receiving message buffer pointer.
Ethernet message forwarding system between the Multi-netmouth, wherein judgment module specifically: when network interface receives ether
After network packet, judge whether to meet specific transactions, if it is, needing to forward, does not otherwise need to forward.
Ethernet message forwarding system between the Multi-netmouth, wherein forwarding module further include: forwarding ether network packet
The network interface that network interface packet receiving task call is forwarded to give out a contract for a project function when, message is sent by function of the giving out a contract for a project network interface that first determines whether to give out a contract for a project
Whether buffer area, which has, saves memory pointer saving when last round of transmission, needing to discharge, if so, then discharging, and saves and works as
The memory and release mark of preceding transmission.
The utility model has the advantages that compared to the prior art, between a kind of Multi-netmouth provided by the invention Ethernet message forwarding method and
System, which comprises A, to preset each network interface to receive message buffer number be first predetermined value, and each receptions is reported
Literary buffer area allocates the memory of 1600 bytes in advance, and presetting each network interface and sending message buffer number is second predetermined
Value sends message buffer and does not allocate memory in advance；B, the reception Ethernet packet network number of oneself is created by each network interface
According to packet task, polling mode packet receiving is taken；C, after network interface receives ether network packet, judge whether ether network packet needs to turn
Hair；D, when the ether network packet that receives of judgement needs to forward, the network interface being forwarded to is needed to give out a contract for a project function hair by calling
It send the current currently transmitted message buffer of network interface for receiving message buffer message, and being forwarded to needs to be arranged not needing to release
Put the mark of memory.The operation of memory application and release when by omitting message forwarding, while network port driving is received telegraph using poll
Mode, every most 2000 messages of scheduling single treatment, can also save O/S kernel scheduling time, and it is left that CPU usage reduces by 15%
The right side, realizes the forwarding of zero memory application zero-copy of ether network packet between Multi-netmouth, and system performance promotes highly significant.
Detailed description of the invention
Fig. 1 is Ethernet message forwarding method preferred embodiment flow chart between a kind of Multi-netmouth provided by the invention.
Fig. 2 is Ethernet message forwarding system functional block diagram between a kind of Multi-netmouth provided by the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Referring to Figure 1, Fig. 1 is Ethernet message forwarding method preferred embodiment stream between a kind of Multi-netmouth provided by the invention
Cheng Tu, comprising steps of
S100, to preset each network interface to receive message buffer number be first predetermined value, each reception message buffering
Area allocates the memory of 1600 bytes in advance, and presetting each network interface and sending message buffer number is second predetermined value, each
It sends message buffer and does not allocate memory in advance；
When implementation, presetting each network interface and receiving message buffer, receive message buffer number is first predetermined
Value, first predetermined value are preferably 50000, and each memory for receiving message buffer and allocating 1600 bytes in advance is set in advance
Setting each network interface and sending message buffer, send the number of message buffer is second predetermined value, and second predetermined value is preferred
It is 50000, sends message buffer and do not allocate memory in advance.
Specifically, preset each network interface and receive message buffer, is i.e. Receive(is abbreviated as RX) Buffer
Description(is abbreviated as BD), that is, receiving message buffer number is 50000, each reception message buffer is preparatory
The memory for distributing 1600 bytes presets each network interface and sends message buffer, i.e. Transmit(is abbreviated as TX) Buffer
Description, that is, the number for sending message buffer is 50000, sends message buffer and does not allocate memory in advance.
S200, the reception Ethernet packet network data packet task that oneself is created by each network interface, take polling mode
Packet receiving；
In this step, the reception Ethernet packet network data packet task of oneself, i.e. packet receiving are created by each network interface
Task takes poll (i.e. polling) mode packet receiving.
Specific packet receiving mode in step S200 are as follows: each network interface receives message buffer pointer, receives message buffer
RING receives whether message buffer has received message using polling mode, real-time query, if there is receiving message, then inquires
Next reception message buffer, while modifying and receiving message buffer pointer, i.e. reception message buffer RING.
Wherein, packet receiving refers to receiving network message data packet, task, i.e. task, or also referred to as thread, i.e.,
Thread in built-in field, claims task, claims thread in Linux in VxWorks.
S300, after network interface receives ether network packet, judge whether ether network packet needs to forward；
Step S300 specifically: after network interface receives ether network packet, judge whether to meet specific transactions, if so,
It then needs to forward, does not otherwise need to forward.
For example, i.e., after network interface A receives message, judge whether to meet specific transactions, two layers of General Analytical message
Or three layers of head.If it is the message for needing to be forwarded to network interface B, calls the function of giving out a contract for a project of network interface B to send current receive and report
Literary buffer area, and the mark of releasing memory is not needed to the setting of network interface B currently transmitted message buffer, it is most important that network interface A
This receive message buffer and do not need application memory and substitute the memory of its band, i.e. zero memory application.
Wherein, the specific transactions include: the nat feature to RTP message, are needed ether network packet two-layer protocol source
MAC Address is substituted for external public network MAC Address, wherein RTP, i.e. Real-time Transport Protocol, Yi Jishi
When transport protocol；NAT, i.e. Network Address Translation, that is, network address translation；MAC, i.e. MAC(Media
Access Control or Medium Access Control) address, free translation is media access control or medium access control
System, or referred to as physical address, hardware address, for defining the position of the network equipment.In osi model, third layer network layer
It is responsible for IP address, second layer data link layer is then responsible for MAC Address.Therefore a host has a MAC Address, and each
Network site has the IP address for being specific to it, and it is fixed that MAC Address, which is that network interface card determines,.
Zero memory application described in the application refers to the forwarding for the specific transactions, but to protocol stack message
Still need to apply memory.Under specific transactions mode, specific transactions message may account for 99% or more, almost it is considered that net
Mouth driving is in the state of zero memory application.
S400, when the ether network packet that receives of judgement needs to forward, pass through the network interface hair for calling and needing to be forwarded to
Packet function sends current reception message buffer message, and the currently transmitted message buffer of network interface being forwarded to needs is arranged
The mark of releasing memory is not needed；
Step S400 further include: the network interface that is forwarded to of network interface packet receiving task call of forwarding ether network packet is given out a contract for a project function
When, by function of giving out a contract for a project first determine whether to give out a contract for a project network interface send message buffer whether have save it is being saved when last round of transmission, need
The memory pointer to be discharged if so, then discharging, and saves currently transmitted memory and release mark.
Specifically, the sending function of network interface does not create task, it is driven by other task.For example, net
When mouthful A packet receiving task call network interface B sending function, network interface B interface function of giving out a contract for a project first judges the currently transmitted message buffer of network interface B
The memory pointer that the needs saved when last round of transmission discharge whether is saved, if so, then discharge, and is saved currently transmitted interior
Deposit and discharge mark.
It is crucial that the reception message buffer that network interface A allows network interface B to send, network interface B are sent completely not yet, network interface A
One circle of poll returns to current location to packet receiving task again, necessarily modifies the upper secondary content to E-Packet.Here it is preferably to set
The reason of setting 50,000 reception message buffers, it is assumed that network interface packet receiving in 1 second 100,000, then 50,000 reception message buffers can
To receive 0.5 second without packet loss, this is still in the minimum hypothesis for not doing any processing and recycling reception message buffer.Network interface
Hardware is inevitable in 0.5 second to be sent completely current message.If 100,000, and CPU is not achieved in network interface flow
It is handling always and is receiving BD, then the time for leaving network interface transmission for is greater than 0.5 second certainly.
When have it is multiple give out a contract for a project network interface when, the interface function of giving out a contract for a project of network interface for participating in forwarding will judge that who will send message,
The function of giving out a contract for a project of the network interface will judge whether the memory pointer for sending the last round of preservation hung on BD will discharge.
Further, when the ether network packet for judging that network interface receives does not need forwarding, then memory substitution is redistributed
Memory where the ether network packet received, and the ether network packet memory is transferred to the processing of upper-layer protocol stack.Citing comes
It says, if the message that network interface A is received does not need to forward, by traditional process, redistributes the message place that memory substitution receives
Memory, and by message memory be submitted to upper-layer protocol stack processing, protocol stack processing after the completion of can discharge the memory.
Meanwhile traditional network port driving uses interrupt mode packet receiving, and the technical solution also can be used.
Technical solution of the present invention, when the ether network packet that judgement receives needs to forward, by calling Ethernet
Message needs the function of giving out a contract for a project for the network interface being forwarded to send current reception message buffer, has accomplished between multiple physical internet ports
The forwarding mechanism of zero memory application and zero memory copying, is omitted Ethernet report in the prior art in ether network packet repeating process
In literary repeating process system memory application and release frequent operation, especially when the ether network packet for needing to forward big flow
When, system performance promotes highly significant.Network port driving is using poll receiving mode, most 2000 of every scheduling single treatment simultaneously
Message can also save O/S kernel scheduling time herein, and CPU usage reduces by 15% or so.
Corresponding to the above method, Fig. 2 is referred to, Fig. 2 is ether network packet forwarding between a kind of Multi-netmouth provided by the invention
System preferred embodiment functional block diagram, comprising:
Module 10 is pre-seted, is first predetermined value for presetting each network interface to receive message buffer number, each
The memory that message buffer allocates 1600 bytes in advance is received, presetting each network interface and sending message buffer number is second
Predetermined value sends message buffer and does not allocate memory in advance, as detailed above；
Packet receiving module 20 is adopted for creating oneself reception Ethernet packet network data packet task by each network interface
Polling mode packet receiving is taken, as detailed above；
Judgment module 30 has for judging whether ether network packet needs to forward after network interface receives ether network packet
Body is as described above；
Forwarding module 40 when the ether network packet for receiving when judgement needs to forward, needs to be forwarded by calling
To network interface give out a contract for a project function send it is current receive message buffer message, and to the currently transmitted message of network interface that needs are forwarded to
Setting buffers do not need the mark of releasing memory, as detailed above.
Ethernet message forwarding system between the Multi-netmouth, wherein further include:
Protocol stack processing module, for when the ether network packet for judging that network interface receives does not need forwarding, then dividing again
Memory where the ether network packet received with memory substitution, and the ether network packet memory is transferred at upper-layer protocol stack
Reason, as detailed above.
Ethernet message forwarding system between the Multi-netmouth, wherein packet receiving module 20 specifically: connect for each network interface
Literary buffer pointer of receiving telegraph receives whether message buffer has received message using polling mode, real-time query, if there is receiving
To message, then next reception message buffer is inquired, while modifying and receiving message buffer pointer, as detailed above.
Ethernet message forwarding system between the Multi-netmouth, wherein judgment module 30 specifically: for being received when network interface
To after ether network packet, judge whether to meet specific transactions, if it is, needing to forward, does not otherwise need to forward, it is specific as above
It is described.
Ethernet message forwarding system between the Multi-netmouth, wherein forwarding module 40 further include: for forwarding Ethernet
The network interface that the network interface packet receiving task call of message is forwarded to give out a contract for a project function when, first determined whether to give out a contract for a project network interface hair by function of giving out a contract for a project
It send message buffer whether to have and saves memory pointer saving when last round of transmission, needing to discharge, if so, then discharge, and
Currently transmitted memory and release mark are saved, as detailed above.
In conclusion Ethernet message forwarding method and system between a kind of Multi-netmouth provided by the present invention, the method
Include: A, to preset each network interface to receive message buffer number be first predetermined value, each reception message buffer is preparatory
The memory for distributing 1600 bytes, presetting each network interface and sending message buffer number is second predetermined value, and it is slow to send message
It rushes area and does not allocate memory in advance；B, the reception Ethernet packet network data packet task that oneself is created by each network interface, takes
Polling mode packet receiving；C, after network interface receives ether network packet, judge whether ether network packet needs to forward；D, when judgement connects
When the ether network packet received needs to forward, being given out a contract for a project by the network interface for calling needs to be forwarded to, function transmission is current to receive message
Buffer area message, and the currently transmitted message buffer setting of network interface being forwarded to needs does not need the mark of releasing memory.
The operation of memory application and release when by omitting message forwarding, while network port driving is using poll receiving mode, every scheduling one
Secondary most 2000 messages of processing, can also save O/S kernel scheduling time, CPU usage reduction by 15% or so, between realization Multi-netmouth
The forwarding of zero memory application zero-copy of ether network packet, system performance promote highly significant.
Certainly, those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method,
It is that related hardware (such as processor, controller etc.) can be instructed to complete by computer program, the program can store
In a computer-readable storage medium, which may include the process such as above-mentioned each method embodiment when being executed.Its
Described in storage medium can be for memory, magnetic disk, CD etc..
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (8)
1. Ethernet message forwarding method between a kind of Multi-netmouth, which comprises the following steps:
A, presetting each network interface and receiving message buffer number is first predetermined value, and each reception message buffer divides in advance
Memory with 1600 bytes, presetting each network interface and sending message buffer number is second predetermined value, each transmission message
Do not allocate memory in advance in buffer area；
B, the reception Ethernet packet network data packet task that oneself is created by each network interface, takes polling mode packet receiving；
C, after network interface receives ether network packet, judge whether ether network packet needs to forward；
D, when the ether network packet that receives of judgement needs to forward, the network interface being forwarded to is needed to give out a contract for a project function hair by calling
It send the current currently transmitted message buffer of network interface for receiving message buffer message, and being forwarded to needs to be arranged not needing to release
Put the mark of memory；
When the ether network packet for judging that network interface receives does not need forwarding, then redistributes memory and substitute the Ethernet report received
Memory where literary, and the ether network packet memory is transferred to the processing of upper-layer protocol stack.
2. Ethernet message forwarding method between Multi-netmouth according to claim 1, which is characterized in that step B specifically:
Each network interface receives message buffer pointer and receives whether message buffer has received using polling mode, real-time query
Message then inquires next reception message buffer if there is receiving message, while modifying and receiving message buffer pointer.
3. Ethernet message forwarding method between Multi-netmouth according to claim 1, which is characterized in that step C specifically: when
After network interface receives ether network packet, judge whether to meet specific transactions, if it is, needing to forward, does not otherwise need to forward.
4. Ethernet message forwarding method between Multi-netmouth according to claim 1, which is characterized in that step D further include: turn
The network interface that is forwarded to of network interface packet receiving task call of hair ether network packet give out a contract for a project function when, first determine whether to send out by function of giving out a contract for a project
Packet network interface sends whether message buffer has memory pointer saving when the last round of transmission of preservation, needing to discharge, if so, then
Release, and save currently transmitted memory and release mark.
5. Ethernet message forwarding system between a kind of Multi-netmouth characterized by comprising
Module is pre-seted, is first predetermined value for presetting each network interface to receive message buffer number, each reception report
Literary buffer area allocates the memory of 1600 bytes in advance, and presetting each network interface and sending message buffer number is second predetermined
Value sends message buffer and does not allocate memory in advance；
Packet receiving module takes poll for creating oneself reception Ethernet packet network data packet task by each network interface
Mode packet receiving；
Judgment module, for judging whether ether network packet needs to forward after network interface receives ether network packet；
Forwarding module, when the ether network packet for receiving when judgement needs to forward, by calling the net for needing to be forwarded to
Mouth is given out a contract for a project, and function transmission is current to receive message buffer message, and to the currently transmitted message buffer of network interface that needs are forwarded to
The mark for not needing releasing memory is set；
Protocol stack processing module, in when the ether network packet for judging that network interface receives does not need forwarding, then redistributing
The memory where the ether network packet that substitution receives is deposited, and the ether network packet memory is transferred to the processing of upper-layer protocol stack.
6. Ethernet message forwarding system between Multi-netmouth according to claim 5, which is characterized in that packet receiving module is specific
Are as follows: each network interface receives message buffer pointer and receives whether message buffer has received using polling mode, real-time query
Message then inquires next reception message buffer if there is receiving message, while modifying and receiving message buffer pointer.
7. Ethernet message forwarding system between Multi-netmouth according to claim 5, which is characterized in that
Judgment module specifically: after network interface receives ether network packet, judge whether to meet specific transactions, if it is, needing
It forwards, does not otherwise need to forward.
8. Ethernet message forwarding system between Multi-netmouth according to claim 5, which is characterized in that forwarding module also wraps
Include: the network interface that is forwarded to of network interface packet receiving task call of forwarding ether network packet give out a contract for a project function when, by giving out a contract for a project function first
Judgement give out a contract for a project network interface send message buffer whether have save it is being saved when last round of transmission, need the memory pointer that discharges, such as
Fruit has, then discharges, and saves currently transmitted memory and release mark.
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| CN108595270B (en) * | 2018-04-27 | 2021-07-23 | 新华三信息安全技术有限公司 | Memory resource recovery method and device |
| CN113259271B (en) * | 2021-07-15 | 2021-09-24 | 武汉绿色网络信息服务有限责任公司 | Message switching method and message switching system |
| CN114500411A (en) * | 2021-12-30 | 2022-05-13 | 长园深瑞继保自动化有限公司 | Data forwarding system, method, computing device and programmable logic device |
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| CN1545274A (en) * | 2003-11-18 | 2004-11-10 | ����ͨѶ�ɷ�����˾ | A method for implementing memory space occupation reduction during multicast data packet forwarding |
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