CN102082688A - Method for realizing management of TCP (transmission control protocol) out-of-order buffer by means of combination of software and hardware - Google Patents
Method for realizing management of TCP (transmission control protocol) out-of-order buffer by means of combination of software and hardware Download PDFInfo
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- CN102082688A CN102082688A CN2010106117487A CN201010611748A CN102082688A CN 102082688 A CN102082688 A CN 102082688A CN 2010106117487 A CN2010106117487 A CN 2010106117487A CN 201010611748 A CN201010611748 A CN 201010611748A CN 102082688 A CN102082688 A CN 102082688A
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Abstract
The invention provides a method for realizing management of a TCP (transmission control protocol) out-of-order buffer by means of combination of software and hardware. The hardware is responsible of the application and use of the out-of-order buffer, the software is responsible for the release of the out-of-order buffer, and the method comprises the following steps: using a hardware network card to receive an out-of-order TCP message, then applying for the out-of-order buffer, and notifying the software of an out-of-order TCP connection; and connecting the out-of-order buffer into a linked list in series when the software of an interface library processes the out-of-order TCP connection, and using the software to look up the linked list and notifying the hardware of releasing the buffer when the out-of-order buffer needs to be deleted. By adopting the method, the management of the large-capacity TCP out-of-order buffer is realized, and a TCP unloading system can perform out-of-order rearrangement on a high-speed network.
Description
Technical field
The present invention relates to the network data processing field, be specifically related to the method that a kind of software and hardware combining realizes the out of order buffer management of TCP.
Background technology
The TCP Unloading Technology is the TCP/IP network protocol stack in the host software to be handled to be cured in the network interface card hardware realize, so that reduce the cpu of system load, increases the technology of network I/O bandwidth.The TCP uninstalling system generally comprises two parts function, and first is the management of TCP connection status, shows to safeguard that with the TCP connection each TCP connects beginning, transfer of data, closing state.Second portion is the tcp data management, is used for the data of out of order TCP message are resequenced, and the data extract of TCP transmission is come out to submit to main frame.
When in hardware, carrying out the out of order rearrangement of TCP, need to use the out of order data of buffering area buffer memory, need complicated out of order buffer management mechanism, wherein the most important thing is the distribution and the release of out of order buffering area.
In the general TCP uninstalling system, hardware distributes at every turn and discharges out of order buffering area all will repeatedly visit plate and carry internal memory, particularly during the buffer release district, often need to search the oldest buffering area, the plate that is subject to hardware carries memory size and special chip clock frequency, the typical hardware system is difficult to realize searching efficiently, causes and can not manage jumbo out of order buffering area, is difficult to satisfy the out of order rearrangement requirement of tcp of express network.
Summary of the invention
The objective of the invention is to strengthen the out of order buffer management ability of TCP of hardware, make the out of order buffering area of the big capacity of TCP uninstalling system support by software.
A kind of software and hardware combining realizes the method for the out of order buffer management of TCP, may further comprise the steps:
After A, network interface card received the message of a TCP connection, out of order if message has taken place, then slave plate carried out of order buffering area of application in the internal memory, is used for the message of this connection is sorted;
B, network interface card are when the message that connects to this TCP of software transmission, and by a mark is set in the header of message, this connection of notice software has taken place out of order, has taken an out of order buffering area;
After C, interface library are received the message that out of order TCP connection takes place, this TCP connection is connected in series in the out of order TCP chained list, and the heap(ed) capacity of chained list is safeguarded;
D, when out of order TCP capacity surpasses the threshold value of systemic presupposition, interface library software is found out the out of order TCP that needs discharge and is connected from chained list, notice hardware discharges the out of order buffering area of this connection.
A kind of optimal technical scheme of the present invention is:
When software is searched the out of order buffering area that need to discharge in the described D step, can be by the oldest connection, methods such as minimum use connection are selected, and notice discharges the out of order buffering area of this connection.
The present invention has realized the out of order buffer management of large capacity I CP, makes the TCP uninstalling system can carry out out of order rearrangement on express network.
Description of drawings
Fig. 1 is that system of the present invention forms structure chart
Embodiment
Use the out of order buffering area that plate carries in the internal memory that out of order message is sorted in the hardware, in out of order buffer management process, hardware is responsible for the application and the use of out of order buffering area.
Software is set up the chained list of the out of order buffering area in using in application software api interface storehouse, out of order buffering area is managed, and software is responsible for the release of out of order buffering area.
Implementation method and process are as follows:
(1) the hardware network interface card receives out of order TCP message, applies for out of order buffering area.
After the hardware network interface card received the message of a TCP connection, out of order if message has taken place, then slave plate carried out of order buffering area of application in the internal memory, is used for the message of this connection is sorted.
(2) hardware network interface card notice software TCP connection has taken place out of order.
Hardware is when the message that connects to this TCP of software transmission, and by a mark is set in the header of message, this connection of notice software has taken place out of order, has taken an out of order buffering area.
(3) the out of order TCP of interface library software processes connects, notice hardware buffer release district.
After interface library is received the message that out of order TCP connection takes place, this TCP connection is connected in series in the out of order TCP chained list, and the heap(ed) capacity of chained list safeguarded, when out of order TCP capacity surpasses the threshold value of systemic presupposition, interface library software is found out the out of order TCP connection that needs discharge from chained list, such as the oldest connection or the connection of minimum use, notice hardware discharges the out of order buffering area of this connection.
Claims (2)
1. a software and hardware combining realizes the method for the out of order buffer management of TCP, it is characterized in that: may further comprise the steps:
After A, network interface card received the message of a TCP connection, out of order if message has taken place, then slave plate carried out of order buffering area of application in the internal memory, is used for the message of this connection is sorted;
B, network interface card are when the message that connects to this TCP of software transmission, and by a mark is set in the header of message, this connection of notice software has taken place out of order, has taken an out of order buffering area;
After C, interface library are received the message that out of order TCP connection takes place, this TCP connection is connected in series in the out of order TCP chained list, and the heap(ed) capacity of chained list is safeguarded;
D, when out of order TCP capacity surpasses the threshold value of systemic presupposition, interface library software is found out the out of order TCP that needs discharge and is connected from chained list, notice hardware discharges the out of order buffering area of this connection.
2. a kind of according to claim 1 software and hardware combining realizes the method for the out of order buffer management of TCP, it is characterized in that: during software searches that needs discharge in the described D step out of order buffering area, can be by the oldest connection, methods such as minimum use connection are selected, and notice discharges the out of order buffering area of this connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010611748.7A CN102082688B (en) | 2010-12-17 | 2010-12-17 | Method for realizing management of TCP (transmission control protocol) out-of-order buffer by means of combination of software and hardware |
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| CN201010611748.7A CN102082688B (en) | 2010-12-17 | 2010-12-17 | Method for realizing management of TCP (transmission control protocol) out-of-order buffer by means of combination of software and hardware |
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| CN102082688B CN102082688B (en) | 2014-08-13 |
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| CN114024924A (en) * | 2022-01-05 | 2022-02-08 | 北京安博通科技股份有限公司 | TCP stream recombination method and device, electronic equipment and storage medium |
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Effective date of registration: 20220802 Address after: 100193 No. 36 Building, No. 8 Hospital, Wangxi Road, Haidian District, Beijing Patentee after: Dawning Information Industry (Beijing) Co.,Ltd. Patentee after: DAWNING INFORMATION INDUSTRY Co.,Ltd. Address before: 100084 Beijing Haidian District City Mill Street No. 64 Patentee before: Dawning Information Industry (Beijing) Co.,Ltd. |