CN109818982A - A method of it promoting network communication equipment and creates performance - Google Patents
A method of it promoting network communication equipment and creates performance Download PDFInfo
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Abstract
The present invention discloses a kind of method that promotion network communication equipment creates performance, gives out a contract for a project method by contrast standard protocol stack to illustrate that Fast_l2 module is given out a contract for a project method；The present invention is that data packet adds Ethernet and vlan header information according to the linking status information of preservation in Fast_l2 module, then the driving function ndo_start_xmit that gives out a contract for a project is called directly to send out corresponding data packet, skip the relevant treatment of entire agreement trestle and vlan, the memory for reducing two layered data processing packet of protocol stack to a certain extent uses and CPU is consumed, so that improving product creates performance；In addition, small with the kernel module committed memory that the invention is write, the more nervous network communication equipment of memory can be loaded, portable high；And only hook point need to be hung at ip_finish_output2 function and take data packet, and define fast_l2_ext pointer variable in link tracking struct nf_conn structural body and two layers of cache information of the link is taken to carry out package transmission, the kernel module coupling write with this method is low.
Description
Technical field
The invention belongs to the communications field more particularly to a kind of methods for promoting network communication equipment and creating performance.
Background technique
Performance is to measure the most direct evaluation of a network communication equipment quality, and wherein performance indicator mainly includes handling up
Amount, message forward rate, maximum concurrently link number, newly-built link number per second, Forwarding Delay, shake etc..
In communications equipment market with keen competition, to promote user's online experience and improving network communication equipment market competition
Power, need to be with same hardware resource or cost, and the equipment for createing higher performance could stand in this strand of tide of communication equipment field
Top of.
At CPU and the fixed situation of memory, the tuning that network communication equipment creates performance at present mainly has:
(1) the page_size parameter of kernel is adjusted.
(2) adjustment kernel link tracking parameter (be located at/proc/sys/net/netfilter/ catalogue under), as created
Maximum link number limits nf_conntrack_max；The size nf_conntrack_htable_ of link tracking hash table
Size promotes CPU hit rate, reduces CPU usage etc..
(3) code optimization (drop circulation optimizes CPU operation frequently and inefficiency code etc.).
However, the following problem that above-mentioned tuning method still has:
(1) after by adjusting schemes such as kernel proc catalogue parameter, code optimizations, the network equipment data packet forwarding still need to through
Protocol stack is crossed, when data volume is huge, memory is consumed and CPU is particularly evident, and forward efficiency is lower, influence newly-built performance.
(2) the part low side network equipment, especially Household communication product, memory and CPU are poor, and product creates ability and do not reach
Standard level is badly in need of certain methods and goes to optimize newly-built performance, to improve product competitiveness in the market.
To sum up, it is necessary to study a kind of method that promotion network communication equipment creates performance.
Summary of the invention
To solve drawbacks described above, the present invention proposes a kind of method that promotion network communication equipment creates performance, in Fast_
L2 module is that data packet adds Ethernet and vlan header information according to the linking status information of preservation, then calls directly driving
The function ndo_start_xmit that gives out a contract for a project directly transmits data packet, the relevant treatment of entire agreement trestle and vlan is skipped, certain
CPU usage is reduced in degree, to improve newly-built performance.
The technical scheme of the present invention is realized as follows:
The present invention discloses a kind of method that promotion network communication equipment creates performance, is given out a contract for a project by contrast standard protocol stack
Method is given out a contract for a project method to illustrate Fast_l2 module；Standard protocol stack method of giving out a contract for a project includes the following steps: that (S1) protocol stack establishes chain
Connect tracking；(S2) data packet completes NAT, and determines and need to forward to two layers；(S3) pass through ip_output interface；(S4) pass through
Ip_finish_output2 interface；(S5) Vlan ethernet layer information is added；(S6) pass through dev_queue_xmit interface；
(S7) pass through hard_start_xmit interface；Fast_l2 module method of giving out a contract for a project includes the following steps: that (A1) Fast_l2 module opens
It is dynamic；(A2) cache container is initialized；(A3) after protocol stack establishes the link tracking in step (S1), storage allocation, cache are requested
Container allocation space, for saving the link ethernet layer header information；(A4) protocol stack data packet passes through ip_ in step (S4)
Finish_output2 interface, data packet enter Fast_l2 module；(A5) judge cache with the presence or absence of link belonging to data packet
Ethernet layer header information, if it is not, then going to step (A6)；If so, going to step (A8)；(A6) link is added
Ethernet layer header information is to cache；(A7) judge whether cache succeeds, if it is not, being then back to step (S5)；If so, jumping
Go to step (A8)；(A8) ethernet layer header information is added；(A9) step (A8) and step (S7), which are called, drives function of giving out a contract for a project
Ndo_start_xmit directly transmits data packet；(A10) terminate.
In step (S1), when link tracking creates, distributed in one piece by Fast_l2cache container to fast_l2_ext
Space is deposited, link tracking discharges the memory that corresponding fast_l2_ext is directed toward and returns to cache container when destroying.
In step (A4), the data packet into Fast_l2 module is determined by link tracking member fast_l2_ext variable
Whether Ethernet, vlan header information have been saved in the memory of fast_l2_ext direction.
Wherein, every link tracking struct nf_conn structural body has a member variable fast_l2_ext, this at
Member's variable is used to save interface used in Ethernet and vlan header information and hair data packet.
Wherein, the Ethernet header information cache of every link is discharged when linking and destroying.
Compared with prior art, the present invention has the advantage that
(1) present invention is that data packet adds Ethernet and vlan according to the linking status information of preservation in Fast_l2 module
Then header information calls directly the driving function ndo_start_xmit that gives out a contract for a project and sends out corresponding data packet, skip entire
The relevant treatment of agreement trestle and vlan, the memory that this method reduces two layered data processing packet of protocol stack to a certain extent use
And CPU consumption, so that improving product creates performance.
(2) the kernel module committed memory write with the invention is small, and the more nervous network communication equipment of memory can add
It carries, it is portable high；And hook point need to be only hung at ip_finish_output2 function and takes data packet, and is tracked in link
Struct nf_conn structural body defines fast_l2_ext pointer variable and two layers of cache information of the link is taken to carry out package hair
It send, the kernel module coupling write with this method is low.
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
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram that the present invention promotes that network communication equipment creates the method for performance.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to facilitate and clarify the description of subsequent embodiment, carried out specifically to a specific embodiment of the invention
Before bright, part term is explained, following explanation is applied to this specification and claims.
English word NAT, ip_output, ip_finish_output2, Vlan, the dev_queue_ occurred in the present invention
xmi、hard_start_xmit、Fast_l2、cache、ndo_start_xmit、Fast_l2cache、fast_l2_ext、
Struct nf_conn etc. is code, do not represent it is other in all senses.
Referring to Fig.1, the present invention discloses a kind of method that promotion network communication equipment creates performance, is assisted by contrast standard
View stack gives out a contract for a project method to illustrate that Fast_l2 module is given out a contract for a project method, the data packet transmission of every link can skip agreement trestle and
The relevant treatment of vlan, the memory for reducing two layered data processing packet of protocol stack uses and CPU is consumed, so that improving product creates property
Energy；Standard protocol stack method of giving out a contract for a project includes the following steps: that (S1) protocol stack establishes the link tracking；(S2) data packet completes NAT, and
It determines and needs to forward to two layers；(S3) pass through ip_output interface；(S4) pass through ip_finish_output2 interface；(S5) add
Add Vlan ethernet layer information；(S6) pass through dev_queue_xmit interface；(S7) pass through hard_start_xmit interface；
Fast_l2 module give out a contract for a project method include the following steps: (A1) Fast_l2 module start；(A2) cache container is initialized；(A3)
After protocol stack establishes the link tracking in step (S1), storage allocation, cache container allocation space, for saving the link are requested
Ethernet layer header information；(A4) in step (S4) protocol stack data packet by ip_finish_output2 interface, data packet into
Enter Fast_l2 module；(A5) cache is judged with the presence or absence of the ethernet layer header information linked belonging to data packet, if it is not, then jumping
Go to step (A6)；If so, going to step (A8)；(A6) the link ethernet layer header information is added to cache；(A7)
Judge whether cache succeeds, if it is not, being then back to step (S5)；If so, going to step (A8)；(A8) Ethernet is added
Layer header information；(A9) step (A8) and step (S7), which are called, drives the function ndo_start_xmit that gives out a contract for a project to directly transmit data
Packet；(A10) terminate.
In step (S1), when link tracking creates, distributed in one piece by Fast_l2cache container to fast_l2_ext
Space is deposited, link tracking discharges the memory that corresponding fast_l2_ext is directed toward and returns to cache container when destroying.
In step (A4), the data packet into Fast_l2 module is determined by link tracking member fast_l2_ext variable
Whether Ethernet, vlan header information have been saved in the memory of fast_l2_ext direction.
Wherein, every link tracking struct nf_conn structural body has a member variable fast_l2_ext, this at
Member's variable is used to save interface used in Ethernet and vlan header information and hair data packet.
Wherein, the Ethernet header information cache of every link is discharged when linking and destroying.
Newly-built performance is promoted since the invention is suitable for all-network communication equipment, therefore by the invention with the shape of kernel module
Formula (Fast_l2 kernel module) is described, and referring to Fig.1, implementation process is specific as follows for the flow diagram which realizes:
The process that three layers of standard protocol stack (ip layers) sends data packet to two layers is as shown in the black thick line left side Fig. 1, black thick line
The right is then that Fast_l2 kernel module of the present invention optimizes the data packet after newly-built performance and gives out a contract for a project process.
Every link tracking struct nf_conn structural body has a member variable fast_l2_ext, which becomes
Amount is used to save interface used in Ethernet and vlan header information and hair data packet.
When link tracking creation, one piece of memory is distributed to fast_l2_ext by Fast_l2cache container (memory pool)
Space, link tracking discharge the memory that corresponding fast_l2_ext is directed toward and return to cache container when destroying；
After data packet has looked into routing at IP layers, finished NAT, pass through interface ip_output → ip_finish_output2
It is handled into two layers, Fast_l2 module adapter tube data packet at ip_finish_output2, takes over and successfully then enter Fast_l2
Module, otherwise data packet is added Ethernet and vlan header information by standard protocol stack and is sent.
Data packet into Fast_l2 module determines Ethernet, vlan by link tracking member fast_l2_ext variable
Whether header information has been saved in the memory of fast_l2_ext direction；
If having saved relevant Ethernet and vlan header information in fast_l2_ext, corresponding interface is just called
Ethernet and vlan header information are added for the data packet, driving is called directly after the completion of package and is given out a contract for a project function ndo_start_
Xmit directly transmits data packet.
If just calling corresponding interface by Ethernet without saving Ethernet and vlan header information in fast_l2_ext
It is stored in vlan header information in the memory of fast_l2_ext direction；
Ethernet and vlan header information addition failure are then forwarded corresponding data packet by protocol stack, otherwise refer to the step
Suddenly " if having saved relevant Ethernet and vlan header information in fast_l2_ext, just calling corresponding interface is the number
According to packet addition Ethernet and vlan header information, it is direct that the driving function ndo_start_xmit that gives out a contract for a project is called directly after the completion of package
Send data packet ".
Ethernet and vlan header information are added for data packet according to the linking status information of preservation in Fast_l2 module,
Then it calls directly the driving function ndo_start_xmit that gives out a contract for a project and directly transmits data packet, skip entire agreement trestle and vlan
Relevant treatment reduces CPU usage to a certain extent, to improve newly-built performance.
The present invention is that data packet adds Ethernet and the head vlan according to the linking status information of preservation in Fast_l2 module
Then information calls directly the driving function ndo_start_xmit that gives out a contract for a project and sends out corresponding data packet, skips entire agreement
The relevant treatment of trestle and vlan, this method reduce to a certain extent two layered data processing packet of protocol stack memory use and
CPU consumption, so that improving product creates performance；In addition, small with the kernel module committed memory that the invention is write, memory compared with
Nervous network communication equipment can load, portable high.And hook need to be only hung at ip_finish_output2 function
Point takes data packet, and defines fast_l2_ext pointer variable in link tracking struct nf_conn structural body and take the link
Two layers of cache information carry out package transmission, and the kernel module coupling write with this method is low.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method for promoting network communication equipment and creating performance, which is characterized in that it is given out a contract for a project by contrast standard protocol stack
Method is given out a contract for a project method to illustrate Fast_l2 module；Standard protocol stack method of giving out a contract for a project includes the following steps:
(S1) protocol stack establishes the link tracking；
(S2) data packet completes NAT, and determines and need to forward to two layers；
(S3) pass through ip_output interface；
(S4) pass through ip_finish_output2 interface；
(S5) Vlan ethernet layer information is added；
(S6) pass through dev_queue_xmit interface；
(S7) pass through hard_start_xmit interface；
Fast_l2 module method of giving out a contract for a project includes the following steps:
(A1) Fast_l2 module starts；
(A2) cache container is initialized；
(A3) after protocol stack establishes the link tracking in step (S1), storage allocation, cache container allocation space, for protecting are requested
Deposit the link ethernet layer header information；
(A4) protocol stack data packet passes through ip_finish_output2 interface in step (S4), and data packet enters Fast_l2 mould
Block；
(A5) cache is judged with the presence or absence of the ethernet layer header information linked belonging to data packet, if it is not, then going to step
(A6)；If so, going to step (A8)；
(A6) the link ethernet layer header information is added to cache；
(A7) judge whether cache succeeds, if it is not, being then back to step (S5)；If so, going to step (A8)；
(A8) ethernet layer header information is added；
(A9) step (A8) and step (S7), which are called, drives the function ndo_start_xmit that gives out a contract for a project to directly transmit data packet；
(A10) terminate.
2. promoting the method that network communication equipment creates performance as described in claim 1, which is characterized in that in step (S1),
When link tracking creation, one piece of memory headroom, link tracking pin are distributed to fast_l2_ext by Fast_l2 cache container
The memory that corresponding fast_l2_ext is directed toward is discharged when ruining and returns to cache container.
3. promoting the method that network communication equipment creates performance as claimed in claim 2, which is characterized in that in step (A4),
Data packet into Fast_l2 module determines Ethernet, vlan header information by link tracking member fast_l2_ext variable
Whether have been saved in the memory of fast_l2_ext direction.
4. the method as claimed in any one of claims 1-3 for promoting network communication equipment and creating performance, which is characterized in that every
Item link tracking struct nf_conn structural body has a member variable fast_l2_ext, which is used to save
Interface used in Ethernet and vlan header information and hair data packet.
5. as claimed in claim 4 promoted network communication equipment create performance method, which is characterized in that every link with
Too net header information cache is discharged when linking and destroying.
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