CN105610729A - Buffer allocation method, buffer allocation device and network processor - Google Patents
Buffer allocation method, buffer allocation device and network processor Download PDFInfo
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- CN105610729A CN105610729A CN201410663761.5A CN201410663761A CN105610729A CN 105610729 A CN105610729 A CN 105610729A CN 201410663761 A CN201410663761 A CN 201410663761A CN 105610729 A CN105610729 A CN 105610729A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/9005—Buffering arrangements using dynamic buffer space allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/9063—Intermediate storage in different physical parts of a node or terminal
- H04L49/9068—Intermediate storage in different physical parts of a node or terminal in the network interface card
Abstract
Embodiments of the invention provide a buffer allocation method, a buffer allocation device and a network processor, and relate to the field of communication. The buffer allocation method comprises the following steps: dividing a buffer unit of a network processor into a fixed reserved buffer region and a dynamic shared buffer region; allocating a fixed buffer resource for each port of the network processor in the fixed reserved buffer region; and if the actual flow of a port is greater than the fixed buffer resource allocated for the port, allocating a dynamic buffer resource for the port from the dynamic shared buffer region. By using the scheme of the invention, the buffer resources of the network processor can be utilized more effectively.
Description
Technical field
The present invention relates to the communications field, refer to that especially a kind of buffer memory of the port that is applied to network processing unit distributesMethod, device and network processing unit.
Background technology
Network Development speed is surprising now, and the growth of network traffics and the appearance of new business, need the network equipmentThere is linear speed and disposal ability flexibly. Network chip comprises ASIC (special IC) and NP at present(network processing unit) two large classes. Network processing unit relies on its high speed processing and programmability flexibly, becomesFor the effective solution of data processing in current network.
As shown in Figure 1, network processing unit inside comprises two unit conventionally: bag buffer unit and bag are processed and drawnHold up. Message enters network processing unit, first enter bag buffer unit in the corresponding queue of inbound port in; SoAfter, heading enters packet processing engine, and microcode is responsible for processing packet header, after message is modified, reentersBag buffer unit, takes out after former bag links and sends from port with bag buffer unit respective queue.
As shown in Figure 2, in bag buffer unit, comprise multiple queues, each queue is corresponding to an inbound port.Bag buffer unit comprises a block cache (buffer), and this interior queue that saves as different port shares. Existing queueThe method of salary distribution of buffer memory adopts the mode of fixed allocation conventionally, distributes buffer memory according to port speed. Such as,Certain chip comprises 2 10G ports and 10 1GE ports (gigabit ethernet interface), if buffer memory is totalSize is 60K, each 10G port assignment 20K internal memory, each 1GE port assignment 2K internal memory.
There is a drawback in this traditional buffer memory method of salary distribution, sudden and random due to port flowProperty, there will be certain port queue buffer area to exhaust and situation that some queue buffer does not use, thereforeThis precious resources of queue buffer area is not fully used.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cache allocation method, device and network processing unit,Can more effectively utilize network processor cache resource.
For solving the problems of the technologies described above, the technical scheme that embodiments of the invention provide is as follows:
A kind of cache allocation method, comprising:
The buffer unit of network processing unit is divided into fixing reserved buffer zone and dynamic shared buffer memory region;
In fixing reserved buffer zone, for each port of network processing unit distributes respectively a fixing buffer memoryResource;
If the actual flow of a port is greater than the fixing cache resources for this port assignment, slow from dynamically sharingDeposit in region is this port assignment dynamic buffering resource.
Wherein, in fixing reserved buffer zone, for each port of network processing unit distributes respectively one admittedlyThe step of determining cache resources comprises:
In fixing reserved buffer zone, the each end that is network processing unit according to the message transmission rate of portMouth distributes respectively a fixing cache resources.
Wherein, described dynamic shared buffer memory region comprises: multiple dynamic buffering resource pools or and network processesThe port type of device is dynamic buffering resource pool one to one; Wherein, the port type of described network processing unitTo divide according to the message transmission rate of port.
Wherein, described is the step bag of this port assignment dynamic buffering resource from territory, dynamic shared cache areaDraw together:
In multiple dynamic buffering resource pools from territory, dynamic shared cache area or corresponding with this port typeDynamic buffering pond in, be this port assignment dynamic buffering resource.
Embodiments of the invention also provide a kind of buffer memory distributor, comprising:
Divide module, for the buffer unit of network processing unit being divided into fixing reserved buffer zone and dynamicShared buffer memory region;
The first distribution module, in fixing reserved buffer zone, for each port of network processing unit dividesDo not distribute a fixing cache resources;
The second distribution module, is greater than the fixing buffer memory money for this port assignment for actual flow at one end mouthfulSource is this port assignment dynamic buffering resource from territory, dynamic shared cache area.
Wherein, the first distribution module specifically for: in fixing reserved buffer zone, according to the data of portTransfer rate is that each port of network processing unit distributes respectively a fixing cache resources.
Wherein, described dynamic shared buffer memory region comprises: multiple dynamic buffering resource pools or and network processesThe port type of device is dynamic buffering resource pool one to one; Wherein, the port type of described network processing unitTo divide according to the message transmission rate of port.
Wherein, described the second distribution module is specifically for multiple dynamically slow from territory, dynamic shared cache areaDepositing in resource pool or in the dynamic buffering pond corresponding with this port type, is this port assignment dynamic buffering moneySource.
Embodiments of the invention also provide a kind of network processing unit, comprise multiple ports and buffer unit, andBuffer memory distributor as above.
Wherein, above-mentioned network processing unit also comprises: with the processing engine that described buffer unit is connected, and described placeReason engine receives from the packet in described buffer unit, and processes, and packet after treatment is returnedReturn described port.
The solution of the present invention at least has the following advantages:
Such scheme of the present invention is by being divided into the buffer unit of network processing unit fixing reserved buffer areaTerritory and dynamically shared buffer memory region; In fixing reserved buffer zone, for each port of network processing unit dividesDo not distribute a fixing cache resources; If the actual flow of a port is greater than the fixing buffer memory for this port assignmentResource is this port assignment dynamic buffering resource from territory, dynamic shared cache area; Thereby ensure at portWhen flow increases suddenly, can more effectively utilize network processor cache resource.
Brief description of the drawings
Fig. 1 is network processing unit internal structure rough schematic view;
Fig. 2 is existing network processor cache cell queue buffer memory method of salary distribution exemplary plot;
Fig. 3 is cache allocation method flow chart of the present invention;
Fig. 4 is network processor cache of the present invention unit buffer to ports method of salary distribution exemplary plot;
Fig. 5 is that the buffer memory of embodiments of the invention distributes schematic diagram;
Fig. 6 is the buffer memory allocation flow figure of embodiments of the invention.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attachedFigure and specific embodiment are described in detail.
Core concept of the present invention is to be two parts by network processor cache dividing elements: fixing reserved buffer memoryRegion and dynamically shared buffer memory region. Concrete, fixing reserved buffer zone and dynamically shared buffer memory regionSize can be got optimal value by debugging, and fixing reserved buffer zone is the proprietary range of distribution of queue, is similar toTraditional approach, each queue distributes according to port speed; Dynamically shared buffer memory region is divided into resource one by onePond, for the data packet queue of multiple ports is shared. Each port queue needs to specify its dynamic buffering resourcePond. Each port flow enters network processing unit, first arrives the fixing reserved buffer zone of port respective queueApplication cache resources, if fixing reserved buffer zone exhausts, then from the dynamic buffering resource pool of its appointmentApplication distributes cache resources.
As shown in Figure 3, embodiments of the invention provide a kind of cache allocation method, comprising:
Step 31, is divided into the buffer unit of network processing unit fixing reserved buffer zone and dynamically sharesBuffer zone;
Step 32, in fixing reserved buffer zone, for each port of network processing unit distributes respectively onePiece is fixed cache resources;
Step 33, if the actual flow of a port is greater than the fixing cache resources for this port assignment, fromIn shared buffer memory region, be dynamically this port assignment dynamic buffering resource.
Such scheme of the present invention is by being divided into the buffer unit of network processing unit fixing reserved buffer areaTerritory and dynamically shared buffer memory region; In fixing reserved buffer zone, for each port of network processing unit dividesDo not distribute a fixing cache resources; If the actual flow of a port is greater than the fixing buffer memory for this port assignmentResource is this port assignment dynamic buffering resource from territory, dynamic shared cache area; Thereby ensure at portWhen flow increases suddenly, can more effectively utilize network processor cache resource.
In a specific embodiment of the present invention, step 12 can be specifically: in fixing reserved buffer zone,The each port that is network processing unit according to the message transmission rate of port distributes respectively a fixing buffer memory moneySource.
Wherein, described dynamic shared buffer memory region comprises: multiple dynamic buffering resource pools; Described from being dynamically total toEnjoy in buffer zone for the step of this port assignment dynamic buffering resource can be specifically: from dynamic shared buffer memoryIn multiple dynamic buffering resource pools in region, it is this port assignment dynamic buffering resource.
Described dynamic shared buffer memory region comprises: dynamically slow one to one with the port type of network processing unitDeposit resource pool; Wherein, the port type of described network processing unit is to divide according to the message transmission rate of port; As message transmission rate is less than the corresponding dynamic buffering resource pool of port of the first value, transfer of data speedRate is greater than or equal to the corresponding dynamic buffering resource pool of port of this first value.
Concrete, as shown in Figure 4, network processor cache dividing elements is two parts, fixing reserved buffer memoryRegion and dynamically shared buffer memory region. Port is first from fixing reserved buffer zone application buffer memory, trough asFruit exhausts and applies for from territory, dynamic shared cache area, with 2 10G ports and 10 1GE ports beforeSystem be example, can distribute buffer memory according to Fig. 4 mode. First by 60K buffer memory, be divided into two, 30KFixing reserved buffer zone and the dynamic shared buffer memory of 30K region. Fixing reserved buffer zone is according to end transmissionSpeed is divided, each point of 10K of 2 10G ports, each point of 2K of each 1GE port; Dynamically shared cache area30K region, territory is divided into two dynamic buffering resource pools, and a 20K dynamic buffering resource pool is 10G endMouth is used, and a 10K dynamic buffering resource pool is that GE port uses. Last bundling port and cache pool reflectPenetrate relation, two 10G port mapping are to 20K dynamic buffering resource pool, and 10 GE port mapping are to 10KDynamic buffering resource pool.
Port flow is first from the exclusive fixing reserved buffer zone of port storage allocation, as Fig. 5 middle port 1Corresponding queue queue1; If the fixing reserved buffer zone of port is full, dynamically delaying from port associationDeposit and in resource pool, apply for internal memory.
Concrete realization flow figure is as shown in Figure 6:
61 start;
Buffer unit zoning is divided into two parts by 62: fixing reserved buffer zone and dynamically shared buffer memory region;Concrete two region allocation ratios can be got optimal value by debugging;
63 divide the fixing reserved buffer zone of port, can (be the maximum transmitted of port according to port flowSpeed) divide;
64 divide dynamic shared buffer memory region, and dynamic shared buffer memory region is divided into resource pool one by one;Resource pool number and size can be specified flexibly. Also can divide according to flow attribution, such as by multiple 10GResource pool of port assignment, resource pool of multiple GE port assignment;
65 specify resource pool corresponding to each port, and port and resource pool are associated;
66 finish.
Forwarding plane, the flow entering from port, first from port queue fixing reserved buffer zone accordinglyStorage allocation, if there is sufficient space fixing reserved buffer zone, all from Shen, fixing reserved buffer zonePlease; Otherwise apply in the resource pool the dynamic shared buffer memory region being associated from queue. With prior art phaseRelatively, method of the present invention can more effectively be utilized network processor cache resource.
In addition, embodiment is corresponding with said method, and embodiments of the invention also provide a kind of buffer memory to distributeDevice, comprising:
Divide module, for the buffer unit of network processing unit being divided into fixing reserved buffer zone and dynamicShared buffer memory region;
The first distribution module, in fixing reserved buffer zone, for each port of network processing unit dividesDo not distribute a fixing cache resources;
The second distribution module, is greater than the fixing buffer memory money for this port assignment for actual flow at one end mouthfulSource is this port assignment dynamic buffering resource from territory, dynamic shared cache area.
Wherein, the first distribution module specifically for: in fixing reserved buffer zone, according to the data of portTransfer rate is that each port of network processing unit distributes respectively a fixing cache resources.
Wherein, described dynamic shared buffer memory region comprises: multiple dynamic buffering resource pools or and network processesThe port type of device is dynamic buffering resource pool one to one; Wherein, the port type of described network processing unitTo divide according to the message transmission rate of port.
Wherein, described the second distribution module is specifically for multiple dynamically slow from territory, dynamic shared cache areaDepositing in resource pool or in the dynamic buffering pond corresponding with this port type, is this port assignment dynamic buffering moneySource.
Embodiments of the invention also provide a kind of network processing unit, comprise multiple ports and buffer unit, andBuffer memory distributor as above.
Wherein, above-mentioned network processing unit also comprises: with the processing engine that described buffer unit is connected, and described placeReason engine receives from the packet in described buffer unit, and processes, and packet after treatment is returnedReturn described port.
The above is the preferred embodiment of the present invention, it should be pointed out that the common skill for the artArt personnel, not departing under the prerequisite of principle of the present invention, can also make some improvements and modifications,These improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a cache allocation method, is characterized in that, comprising:
The buffer unit of network processing unit is divided into fixing reserved buffer zone and dynamic shared buffer memory region;
In fixing reserved buffer zone, for each port of network processing unit distributes respectively a fixing buffer memoryResource;
If the actual flow of a port is greater than the fixing cache resources for this port assignment, slow from dynamically sharingDeposit in region is this port assignment dynamic buffering resource.
2. cache allocation method according to claim 1, is characterized in that, at fixing reserved buffer memoryIn region, for distributing respectively the step of a fixing cache resources, each port of network processing unit comprises:
In fixing reserved buffer zone, the each end that is network processing unit according to the message transmission rate of portMouth distributes respectively a fixing cache resources.
3. cache allocation method according to claim 1, is characterized in that, described dynamically shared slowDepositing region comprises: multiple dynamic buffering resource pools or moving one to one with the port type of network processing unitState cache resources pond; Wherein, the port type of described network processing unit is the message transmission rate according to portDivide.
4. cache allocation method according to claim 3, is characterized in that, described from dynamically sharingStep for this port assignment dynamic buffering resource in buffer zone comprises:
In multiple dynamic buffering resource pools from territory, dynamic shared cache area or corresponding with this port typeDynamic buffering pond in, be this port assignment dynamic buffering resource.
5. a buffer memory distributor, is characterized in that, comprising:
Divide module, for the buffer unit of network processing unit being divided into fixing reserved buffer zone and dynamicShared buffer memory region;
The first distribution module, in fixing reserved buffer zone, for each port of network processing unit dividesDo not distribute a fixing cache resources;
The second distribution module, is greater than the fixing buffer memory money for this port assignment for actual flow at one end mouthfulSource is this port assignment dynamic buffering resource from territory, dynamic shared cache area.
6. buffer memory distributor according to claim 5, is characterized in that, the first distribution module toolBody is used for: in fixing reserved buffer zone, what be network processing unit according to the message transmission rate of port is everyIndividual port distributes respectively a fixing cache resources.
7. buffer memory distributor according to claim 5, is characterized in that, described dynamically shared slowDepositing region comprises: multiple dynamic buffering resource pools or moving one to one with the port type of network processing unitState cache resources pond; Wherein, the port type of described network processing unit is the message transmission rate according to portDivide.
8. buffer memory distributor according to claim 7, is characterized in that, described second distributes mouldPiece specifically for: in the multiple dynamic buffering resource pools from territory, dynamic shared cache area or with this port classIn dynamic buffering pond corresponding to type, it is this port assignment dynamic buffering resource.
9. a network processing unit, comprises multiple ports and buffer unit, it is characterized in that, also comprises:Buffer memory distributor as described in claim 5-8 any one.
10. network processing unit according to claim 9, is characterized in that, also comprises: with described slowThe processing engine that deposit receipt unit connects, described processing engine receives from the packet in described buffer unit, andProcess, packet after treatment is returned to described port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410663761.5A CN105610729A (en) | 2014-11-19 | 2014-11-19 | Buffer allocation method, buffer allocation device and network processor |
| PCT/CN2015/077698 WO2016078341A1 (en) | 2014-11-19 | 2015-04-28 | Buffer allocation method and device, and network processor |
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| CN201410663761.5A CN105610729A (en) | 2014-11-19 | 2014-11-19 | Buffer allocation method, buffer allocation device and network processor |
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| CN107277796A (en) * | 2017-05-27 | 2017-10-20 | 努比亚技术有限公司 | Mobile terminal and its data transmission method |
| CN107870871A (en) * | 2016-09-23 | 2018-04-03 | 华为技术有限公司 | The method and apparatus for distributing caching |
| CN108768898A (en) * | 2018-04-03 | 2018-11-06 | 郑州云海信息技术有限公司 | A kind of method and its device of network-on-chip transmitting message |
| CN109495401A (en) * | 2018-12-13 | 2019-03-19 | 迈普通信技术股份有限公司 | The management method and device of caching |
| WO2020001608A1 (en) * | 2018-06-30 | 2020-01-02 | 华为技术有限公司 | Cache allocation method and device |
| CN115051958A (en) * | 2022-04-14 | 2022-09-13 | 重庆奥普泰通信技术有限公司 | Cache allocation method, device and equipment |
| WO2023097575A1 (en) * | 2021-12-01 | 2023-06-08 | Huawei Technologies Co.,Ltd. | Devices and methods for wirelesscommunication in a wireless network |
| CN116340202A (en) * | 2023-03-28 | 2023-06-27 | 中科驭数（北京）科技有限公司 | Data transmission method, device, equipment and computer readable storage medium |
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| WO2016078341A1 (en) | 2016-05-26 |
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