CN101340373B - Frame receiving control method and apparatus for hardware - Google Patents
Frame receiving control method and apparatus for hardware Download PDFInfo
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- CN101340373B CN101340373B CN2008101189392A CN200810118939A CN101340373B CN 101340373 B CN101340373 B CN 101340373B CN 2008101189392 A CN2008101189392 A CN 2008101189392A CN 200810118939 A CN200810118939 A CN 200810118939A CN 101340373 B CN101340373 B CN 101340373B
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Abstract
The invention discloses a method for controlling hardware frame ending and a device thereof. By arranging a frame ending buffer pool for each hardware frame ending channel, a plurality of frame ending buffers are arranged in each frame ending buffer pool; when the quantity of the frame ending buffers in the frame ending buffer pool is more than the preset frame ending threshold value, the frame ending buffer is allowed to hook the hardware frame ending channel, and the hardware frame ending is started; otherwise, the frame ending buffer is not allowed to hook the hardware frame ending channel. The proposal provided by the embodiment of the invention can prevent the problem that the upper software has not chance of operation caused by CPU involving in a bottom frame ending driver, meanwhile, additional software expenses are not required for measuring the rate of frame ending, and performance loss of the frame ending is less. Moreover, when the upper software is busy, the bottom driver does not send a message to the upper software, a CPU processor can more serve the upper software; when the upper software is free, the bottom driver continues to send messages, thus causing the entire system to be dynamically balanced.
Description
Technical field
The present invention relates to the Computers and Communication technical field, relate in particular to a kind of hardware frame receiving control method and device
Background technology
In the existing switch system, data flow is all handled and is transmitted by hardware (being exchange chip) usually, control flows and some special messages then need be handled by software, address resolution protocol (ARP for example, Address Resolution Protocol) message, various routing protocol packets etc.The common working method of this model is to identify the message that needs software processes by exchange chip, again by the communication mechanism between exchange chip and the CPU, these messages is delivered to CPU, is handled by software again.Usually communicate by letter by internal memory between exchange chip and the CPU, as shown in Figure 1, exchange chip is write message in certain zone of appointing of internal memory, and reinforming CPU has message to produce, after CPU knows this incident, from this zone of appointing, message content is read out.
In switch system, software roughly can be divided into three layers: Drive Layer, data link layer and network layer are with upper strata (comprising network layer).CPU is after receiving message, and message passes through Drive Layer at first, delivers to data link layer by Drive Layer then, sends to network layer at last with the upper strata, as shown in Figure 2.According to the difference of type of message, message all might be processed falls at each level, if processedly fall just no longer up to send.We call upper layer software (applications) to the level more than the Drive Layer.
Receiving the frame driving is exactly that management receives that from CPU incident is to the software of reading the process of message from the internal memory appointed area.In receiving the frame process, the region of memory of depositing the message data content is called receives the frame buffering.Under the situation that message does not dispose, this buffering can not be used by other messages, has only message to dispose after the buffer release, and this block buffering zone can be used by other messages.
Message interaction between CPU and the exchange chip is finished by receiving the frame buffering, and before the frame driving was received in startup, corresponding software need be finished following work:
1, prior receipts frame buffering with the free time is ready to;
2, each receives the initial address and the length of frame buffering to inform exchange chip, and buffering quantity, the corresponding message of a common buffering, and this process is called and articulates buffering.
3, start exchange chip and receive frame.
Exchange chip needs to notify CPU after receiving message, message taken away from receive the frame buffering by corresponding software and handle.Exchange chip provides two kinds of interruptions to notify CPU usually:
1, whenever receives a message, produces once and interrupt that this interruption is called message and interrupts;
2, all buffering areas are all finished using, and produce to interrupt.This interruption is in order to allow CPU know that receipts frame buffering uses up, and needs to prepare new buffering to receive frame next time.This interruption is called the buffering end interrupt.
For switch system, it all is important message usually that exchange chip send the message of CPU, and these messages must in time be handled the true(-)running that could guarantee upper-layer protocol software.Therefore, system is fast as much as possible for the response of these messages, and in other words the priority of receiving the frame driving usually, as long as there is message to deliver to CPU, receive operation and preferential operation that the frame driving can interrupt upper-layer protocol so all than upper layer software (applications) height.During common receipts frame drives, receive frame buffered logic as shown in Figure 3.
Among Fig. 3, the frame buffering is received in the CPU application, if apply for successfully, then will receive the receipts frame buffering that the frame passage articulates new application, starts and receives frame.And if application is unsuccessful, that is to say do not have new receipts frame buffering when distributing, current receipts frame buffering such as need to discharge after (or discharging current receipts frame buffering by force), articulate current receipts frame buffering again, start and receive frame.
Exchange chip is after once receiving frame end, and corresponding software can be applied for free buffer at once, articulates buffering and start to receive frame, like this, as long as memory headroom is enough, just can not stop as long as there being frame to come in to receive frame.Because the disposal ability of CPU is limited, when the frame driving is received in the CPU operation is to carry out in interruption generally speaking, this moment, other process except interrupting comprised that the upper layer software (applications) process just can not get operation, so, when a large amount of messages continues to send CPU, receive frame and drive operation always, though message has been delivered to the upper strata, but the upper layer software (applications) process can't be moved, and these messages also just can not get handling.So continue, it is unusual that the operation of procotol just becomes.
In the prior art, bottom layer driving can be received frame rate by restriction and abdicate CPU, but this also can bring several problems simultaneously:
1, measures receipts frame rate itself and will consume the CPU disposal ability, make that receiving the frame performance reduces;
2, the receipts frame rate of She Zhiing is crossed and can be caused cpu resource idle slowly, the waste processor; The too fast Controlled CPU that do not reach of the receipts frame rate that is provided with is not absorbed in the purpose of receiving the frame driving.How a suitable value is set is a relatively problem of difficulty;
3, this speed limit all is to realize that by software this also can consume the CPU disposal ability usually, reduces and receives the frame performance.
Summary of the invention
The embodiment of the invention provides a kind of hardware frame receiving control method and device, a large amount of messages continue to send under the situation of CPU in the prior art in order to solve, receive frame and drive the problem that operation always causes upper layer software (applications) to have no chance to move, simultaneously, reduce as far as possible and receive the frame performance loss.
Hardware frame receiving control method in a kind of switch system, this method comprises:
A, receive frame passage for each hardware and be provided with and receive the frame Buffer Pool, each is received and comprises several in frame Buffer Pool and receive frames buffering;
B, when the quantity of receiving the frame buffering in the described receipts frame Buffer Pool during greater than predefined receipts frame threshold value, allow described receipts frame buffering to articulate described hardware and receive the frame passage, start hardware and receive frame; Otherwise, do not allow described receipts frame buffering to articulate described hardware and receive the frame passage.
A kind of hardware is received the frame control device, and this device comprises Buffer Pool unit, first judging unit and the unit is set, wherein,
Described Buffer Pool unit is used to each hardware to receive the frame passage receipts frame Buffer Pool is set;
Whether described first judging unit is used for judging quantity that described receipts frame Buffer Pool receives the frame buffering greater than predefined receipts frame threshold value, and judged result is sent the described unit that is provided with;
The described unit that is provided with is used for the judged result according to described first judging unit, determines whether that allowing to receive the frame buffering articulates hardware receipts frame passage, starts hardware and receives frame.
The embodiment of the invention is provided with receipts frame Buffer Pool by receive the frame passage for each hardware, and each is received has several to receive frames buffering in frame Buffer Pool; When the quantity of receiving the frame buffering in the described receipts frame Buffer Pool during greater than predefined receipts frame threshold value, allow described receipts frame buffering to articulate described hardware and receive the frame passage, start hardware and receive frame; Otherwise, do not allow described receipts frame buffering to articulate described hardware and receive the frame passage.The scheme that the embodiment of the invention provides prevents that effectively CPU is absorbed in bottom and receives the problem that the frame driving causes upper layer software (applications) to have no chance to move, and simultaneously, does not need extra software overhead to go to measure and receives frame rate, and the performance loss of receipts frame is little.And when upper layer software (applications) was busy, the bottom layer driving literary composition of no longer delivering newspaper got on, and the CPU processor can more be given upper layer software (applications); And upper layer software (applications) is in the time of the free time, and the bottom layer driving literary composition that continues to deliver newspaper makes whole system reach dynamic equilibrium.
Description of drawings
Fig. 1 receives frame hardware to realize schematic diagram in the prior art;
Fig. 2 is a switch software layering schematic diagram in the prior art;
Fig. 3 receives frame buffered flow chart in the prior art;
Fig. 4 is the main realization principle flow chart of the embodiment of the invention 1;
Fig. 5 is the main realization principle flow chart of the embodiment of the invention 2;
Fig. 6 is the structural representation of the embodiment of the invention 3 generators;
Fig. 7 is the structural representation of the embodiment of the invention 4 generators.
Embodiment
Send the bang path of message in switch software of CPU to be: receive frame driving → data link layer → network layer with the upper strata, all messages all can drive through receiving frame, and each message all can take receipts frame buffering.And have only message processed intact after, receive frame and just can be released.The core concept of the embodiment of the invention is exactly to receive the situation that takies of frame buffering by monitoring, and control hardware send message the speed of CPU.
Be explained in detail to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
As shown in Figure 4, the main realization principle process of the embodiment of the invention 1 is as follows:
Step 11 is received the frame passage for each hardware receipts frame Buffer Pool is set, and each is received has several to receive frames buffering in frame Buffer Pool.
Usually each hardware has a plurality of receipts frame passages, need be respectively each hardware receipts frame passage receipts frame Buffer Pool is set, and each is received a plurality of receipts frames bufferings are set in frame Buffer Pool.Each receipts frame buffering quantity of receiving in the frame Buffer Pool can be consistent, also can be inconsistent.
Here, a receipts frame buffering refers to and can cushion the buffering that a message is received frame, that is to say, a message takies one and receives the frame buffering.Certainly, can be length or other length of two messages also with the size definition of receiving the frame buffering, can set according to actual needs.
Step 12, the quantity of receiving the frame buffering in receiving the frame Buffer Pool be during greater than predefined receipts frame threshold value, allows to receive the frame buffering and articulate hardware and receive the frame passage, starts hardware and receive frame; Otherwise, do not allow to receive the frame buffering and articulate hardware receipts frame passage.
Each message that need mail to CPU takies one and receives the frame buffering, after message disposes, receives the frame buffering and is recovered in the Buffer Pool.Only can deliver newspaper literary composition to CPU having articulated receipts frame buffering because hardware is received the frame passage, otherwise can stop to receive frame, therefore to receive the frame passage be that may command is received frame rate with the frequency that articulates of receiving the frame buffering in control.
Therefore, can be provided with one and receive the frame threshold value, when the free buffer quantity in the Buffer Pool when receiving the frame threshold value, allow that free buffer is articulated to hardware and receive on the frame passage; Otherwise, if smaller or equal to receiving the frame threshold value, then not allowing to receive the frame buffering, the free buffer quantity in the Buffer Pool do not hang the received frame passage, can realize thus receiving the control of frame rate.The receipts frame threshold value here can be provided with as required, and can adjust as required.
Preferably, after receiving the release of frame buffering and getting back to Buffer Pool, need further to judge whether occupied the current receipts frame that articulates hardware cushions, if, judge further that then whether the quantity of receiving receipts frame buffering in the frame Buffer Pool is greater than predefined receipts frame threshold value, if greater than, then allow to receive the frame buffering and articulate hardware receipts frame passage, otherwise, if the quantity of receiving receipts frame buffering in the frame Buffer Pool is smaller or equal to predefined receipts frame threshold value, the perhaps current receipts frame buffering that articulates hardware does not have occupied, does not then process.
Here, judge that whether the current receipts frame that articulates hardware cushions occupied, can be provided with one and take threshold value, when occupied receipts frame buffering number reaches this and takies threshold value, it is occupied to think that the current receipts frame that articulates hardware cushions, otherwise, think that the current receipts frame buffering that articulates is unoccupied.
For instance, set certain hardware and receive and have several to receive frames buffering in the relevant receipts frame Buffer Pool of frame passage, the first meeting of system is that hardware articulates the receipts frame buffering of some in order to receive frame.Here initially hanging the quantity of received frame buffering can set as required, and can adjust.When the receipts frame process end of a message, this receipts frame buffering is released, and gets back to and receives in the frame Buffer Pool, becomes the idle frame of receiving and cushions.At this moment, judge further whether occupied the remaining receipts frame that still articulates hardware cushions.It is all occupied or set and take threshold value and judge that the criterion that takies here can be that residue articulates the receipts frame buffering of hardware.If it is occupied that residue articulates the receipts frame buffering of hardware, the receipts frame buffering negligible amounts that articulates hardware is described, need the new free time of application to receive the frame buffering and articulate hardware.Otherwise, illustrate that the receipts frame buffering quantity that articulates hardware is more, do not need to apply for new free time receipts frame buffering, thereby do not do any operation.When the new free time of needs application is received the frame buffering, judge that further whether the free time receipts frame buffering quantity of receiving in the frame Buffer Pool is greater than predefined receipts frame threshold value, if can articulate new receipts frame buffering for hardware, otherwise, can not articulate new receipts frame buffering for hardware.
By such judgement and restriction, can ensure that the receipts frame buffering of at every turn all having only some articulates hardware and receives the frame passage, thereby assurance CPU can not be absorbed in receipts frame process and can't respond other software.Simultaneously, by to receiving the adjusting of frame threshold value, can control and receive the take degree of frame process to CPU, the efficient of strong raising system.
Accordingly, as shown in Figure 5, be the main realization principle process of the embodiment of the invention 2.
Wherein, receive the frame passage for each hardware receipts frame Buffer Pool is set, each is received has several to receive frames buffering in frame Buffer Pool.After receiving the release of frame buffering, get back to automatically and receive the frame Buffer Pool.
Judge that whether the current receipts frame that articulates hardware cushions occupied, if not, do not process.If, judge further that then whether the receipts frame in the current receipts frame Buffer Pool cushions quantity greater than predefined receipts frame threshold value, if, then allowing receipts frame buffering to articulate hardware and receive the frame passage, frame is received in startup; Otherwise, do not allow to receive the frame buffering and articulate hardware receipts frame passage.
Here, judge that whether the current receipts frame that articulates hardware cushions occupied, can be provided with one and take threshold value, when occupied receipts frame buffering number reaches this and takies threshold value, it is occupied to think that the current receipts frame that articulates hardware cushions, otherwise, think that the current receipts frame buffering that articulates is unoccupied.
With respect to the receipts frame buffering that as shown in Figure 3 prior art provides, present embodiment 2 receive increased after the frame buffering discharges judge receive receive the frame buffering in the frame Buffer Pool quantity whether greater than the step of predefined receipts frame threshold value.Can know by analyzing,, to receive the frame buffering and just can not obtain discharging because upper layer software (applications) does not dispose message (referring to a message here), therefore, the busy situation that the idle quantity of receiving the frame buffering in fact can characterization system.When upper layer software (applications) is busy, receive the frame driving and send more message also can not obtain handling to upper layer software (applications), can cause that on the contrary CPU is absorbed in the receipts frame and drives.So, before the free time, receipts frame buffering did not reach predefined receipts frame threshold value, do not allow hardware deliver newspaper literary composition to CPU, and the idle frame buffering of receiving reaches predefined receipts frame threshold value, illustrate that the upper strata begins the free time, be buffered to hardware receipts frame passage by articulating the idle frame of receiving this moment, allows hardware begin to receive frame.
Correspondingly, the embodiment of the invention 3 also provides a kind of hardware to receive the frame control device, and as shown in Figure 6, this device comprises Buffer Pool unit 21, first judging unit 22 and unit 23 is set, and is specific as follows:
Here, each is received has several to receive the frame buffering in the frame Buffer Pool.Hand frame in each receipts frame Buffer Pool cushions quantity and can equate, also can be unequal.
Whether first judging unit 22 is used for judging the quantity of receiving frame Buffer Pool receipts frame buffering greater than predefined receipts frame threshold value, and the judged result transmission is provided with unit 23.
Preferably, aforesaid hardware is received the frame control device and is also comprised threshold cell 24, is used for setting receiving the receipts frame threshold value that the frame Buffer Pool allows the receipts frame buffering quantity of receipts frame, and as required described receipts frame threshold value is adjusted.
Preferably, as shown in Figure 7, be the embodiment of the invention 4 generator structural representations.Hardware shown in above-mentioned embodiment 3 is received in the frame control device, between the Buffer Pool unit 21 and first judging unit 22, also comprise second judging unit 25, be used to judge whether the current receipts frame that articulates hardware cushions occupied, if notify described first judging unit 22 to carry out subsequent treatment.
Here, judge that whether the current receipts frame that articulates hardware cushions occupied, can be provided with one and take threshold value, when occupied receipts frame buffering number reaches this and takies threshold value, it is occupied to think that the current receipts frame that articulates hardware cushions, otherwise, think that the current receipts frame buffering that articulates is unoccupied.
To sum up, the scheme that the embodiment of the invention provides prevents that effectively CPU is absorbed in bottom and receives the problem that the frame driving causes upper layer software (applications) to have no chance to move, and simultaneously, does not need extra software overhead to go to measure and receives frame rate, and the performance loss of receipts frame is little.And when upper layer software (applications) was busy, the bottom layer driving literary composition of no longer delivering newspaper got on, and the CPU processor can more be given upper layer software (applications); And upper layer software (applications) is in the time of the free time, and the bottom layer driving literary composition that continues to deliver newspaper makes whole system reach dynamic equilibrium.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. the hardware frame receiving control method in the switch system is characterized in that this method comprises:
A, receive frame passage for each hardware and be provided with and receive the frame Buffer Pool, each is received and comprises several in frame Buffer Pool and receive frames buffering;
B, when the quantity of receiving the frame buffering in the described receipts frame Buffer Pool during greater than predefined receipts frame threshold value, allow described receipts frame buffering to articulate described hardware and receive the frame passage, start hardware and receive frame; Otherwise, do not allow described receipts frame buffering to articulate described hardware and receive the frame passage.
2. the method for claim 1 is characterized in that, before step B, further comprises:
Judge whether the current receipts frame that articulates described hardware receipts frame passage cushions occupied, if, execution in step B, otherwise, not processing, flow process finishes.
3. method as claimed in claim 2 is characterized in that, describedly judges whether the current receipts frame buffering that articulates is occupied, comprising:
Be provided with one and take threshold value;
When occupied receipts frame buffering number greater than described when taking threshold value, currently articulate described hardware to receive the receipts frame buffering of frame passage occupied, otherwise, currently articulate described hardware to receive the receipts frame buffering of frame passage unoccupied.
4. method as claimed in claim 1 or 2 is characterized in that, the quantity of the receipts frame buffering that comprises in the described different receipts frame Buffer Pool equates or do not wait.
5. method as claimed in claim 1 or 2 is characterized in that, this method further comprises:
In receiving the frame process, each message takies a described receipts frame buffering;
After described message disposed, described receipts frame buffering was recovered in the described receipts frame Buffer Pool.
6. a hardware is received the frame control device, it is characterized in that, this device comprises Buffer Pool unit, first judging unit and the unit is set, wherein,
Described Buffer Pool unit is used to each hardware to receive the frame passage receipts frame Buffer Pool is set;
Whether described first judging unit is used for judging quantity that described receipts frame Buffer Pool receives the frame buffering greater than predefined receipts frame threshold value, and judged result is sent the described unit that is provided with;
The described unit that is provided with is used for the judged result according to described first judging unit, determines whether that allowing to receive the frame buffering articulates hardware receipts frame passage, starts hardware and receives frame.
7. device as claimed in claim 6 is characterized in that described device further comprises threshold cell, is used for setting as required and/or revising the receipts frame threshold value of receiving the frame Buffer Pool.
8. device as claimed in claim 6, it is characterized in that, the described unit that is provided with, allows described receipts frame buffering to articulate described hardware and receives the frame passage when being the quantity of receiving the frame buffering in the described receipts frame Buffer Pool greater than described receipts frame threshold value in described judged result, starts hardware and receives frame; Otherwise, do not allow described receipts frame buffering to articulate described hardware and receive the frame passage.
9. device as claimed in claim 6, it is characterized in that, between the described Buffer Pool unit and first judging unit, also comprise second judging unit, be used to judge whether occupied the current receipts frame that articulates described hardware receipts frame passage cushions, if notify described first judging unit to carry out subsequent treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101189392A CN101340373B (en) | 2008-08-27 | 2008-08-27 | Frame receiving control method and apparatus for hardware |
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| CN2008101189392A CN101340373B (en) | 2008-08-27 | 2008-08-27 | Frame receiving control method and apparatus for hardware |
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| CN101340373A CN101340373A (en) | 2009-01-07 |
| CN101340373B true CN101340373B (en) | 2011-08-17 |
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| CN107995016B (en) * | 2016-10-26 | 2021-03-23 | 普天信息技术有限公司 | Network fault processing method, device and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6952401B1 (en) * | 1999-03-17 | 2005-10-04 | Broadcom Corporation | Method for load balancing in a network switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6952401B1 (en) * | 1999-03-17 | 2005-10-04 | Broadcom Corporation | Method for load balancing in a network switch |
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