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Method of using buffer area

A technology of buffer area and sub-cache, applied in the computer field, can solve the problems of reducing the number of buffer areas, insufficient buffer area, suspending work, etc., to achieve the effect of improving the utilization rate

Inactive Publication Date: 2006-07-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But this method of using the cache will lead to new problems: allocating a cache for each connection will greatly increase the demand for the cache, and cause some caches corresponding to connections with low traffic to always be idle; or when When the number of buffers is constant, the number of buffers allocated to each connection will decrease, which will cause a connection to stop working due to insufficient buffers when there is a burst of traffic. From this, it can be seen that there are problems with this method of using buffers is a less efficient use of the buffer

Method used

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Examples

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no. 1 example

[0056] First embodiment: AAL5 is a connection-oriented service. When data transmission is required, a permanent virtual circuit PVC (Permanent Virtual Circuit, permanent virtual circuit) between the sending end and the receiving end is established first, and data is transmitted through the permanent virtual circuit.

[0057] When the present invention is applied to the data transmission of AAL5, at first the cache area pool is divided into predetermined number of private sub-buffer area pools and shared sub-buffer area pools; Identification (VPI (Virtual Pass Identifier, virtual path identifier), VCI (Virtual Channel Identifier, virtual channel identifier)), therefore, the corresponding relationship between the channel for transmitting data and the private sub-buffer pool can be set according to the network identifier.

[0058] The method of using each private sub-cache pool is the same as the method of dynamically using the cache in the prior art. In order to facilitate the u...

no. 2 example

[0065] Second embodiment: SSCOP (Service Specific Conection Orientated Protocol, the connection-oriented protocol of specific service) IPOA (IP Over ATM) is based on the different upper layer services of AAL5 connection, and the protocol group is respectively SSCOP / AAL5 / ATM, IPOA / AAL5 / ATM .

[0066] In order to prevent different services from interfering with each other, it is usually necessary to allocate different buffer areas for different service types. When the present invention is applied to these two kinds of services, at first the buffer pool is divided into two private sub-buffer pools and a shared sub-buffer pool for the two types of business; then the private sub-buffer pools are assigned to For the channel corresponding to each service, for example, pool 1 is allocated to SSCOP, pool 2 is allocated to IPOA, and pool 3 is a shared buffer.

[0067] When needing to carry out data transmission, at first find corresponding private sub-buffer pool according to the busin...

no. 3 example

[0069] Embodiment 3: In a communication system, there are different trunk lines between different network nodes. In order to ensure that data from different ports do not interfere with each other, it is necessary to allocate different buffer areas for data from different physical ports during transmission. . When the present invention is applied, different private sub-buffer pools are allocated for data from different physical ports, and a buffer area is allocated as a shared buffer of each physical port. The current port types include trunk mapping ports, connection ports between circuit boards, and optical / electrical interfaces, etc. Therefore, the corresponding relationship between the channel for transmitting data and the private sub-buffer pool can be set according to the port type. The specific management method of the buffer is consistent with the previous example.

[0070] When data transmission is required, first find the corresponding private sub-buffer pool accordi...

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Abstract

The method includes following steps: the buffer pool is divided into the private sub buffer pool and the shared buffer pool; then sets up a coincidence relation between the private buffer pool and the channel carrying data; applies buffer area to the private buffer pool in term of the coincidence relation; when the data flow exceeds the capacity of the private buffer pool, applies the buffer area to the shared buffer pool.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method for using a cache area in a processor. Background technique [0002] At present, the processor has been widely used, and it plays different tasks in various network services and applications of different performance levels. With the development of network technology and applications, the requirements for the capacity of network equipment and the processing capability of single boards are getting higher and higher. In a processor, multiple coprocessors are usually required to work in parallel, and the processing of a data packet is completed by several coprocessors through multiple modules. In order to alleviate the contradiction of speed mismatch between different modules, reduce the interrupt frequency of the CPU in each module, and improve the parallelism between the CPU and the input / output unit, it is necessary to introduce a buffer to cache the sending and receiving data o...

Claims

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Application Information

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IPC IPC(8): H04L12/56G06F12/00H04L29/06H04L49/901
Inventor 邱伟民
Owner HUAWEI TECH CO LTD
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