CN101702688B - Data package transmit-receive method - Google Patents

Data package transmit-receive method Download PDF

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CN101702688B
CN101702688B CN2009102728440A CN200910272844A CN101702688B CN 101702688 B CN101702688 B CN 101702688B CN 2009102728440 A CN2009102728440 A CN 2009102728440A CN 200910272844 A CN200910272844 A CN 200910272844A CN 101702688 B CN101702688 B CN 101702688B
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packet
buffer memory
data package
upper level
level applications
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CN101702688A (en
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刘锋
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Wuhan Greenet Information Service Co Ltd
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Wuhan Greenet Information Service Co Ltd
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Abstract

The invention discloses a data package transmitting-receiving method, comprising the following steps: a buffer memory is arranged in a physical memory of a network card and the mapping relation of an upper application program of user space and the buffer memory is built; the hardware of the network card receives a data package; the data package is written to the buffer memory; hardware interrupt is generated; a software interrupt service program of the network card is transferred and a network card driving program is informed to receive the data package in the buffer memory, and the buffer memory informs the upper application program to receive the data package in the buffer memory; the upper application program received the data package and processes the data package; the software interrupt service program of the network card is transferred and the network card driving program is informed to transmit the data package; and the network card driving program transmits the data package. By adopting the method to transmit and receive the data package, IP stack does not need to be used to carry out two-time copy of the data package between the kernel space and the user space of an operating system, and vast unnecessary software interrupt can not happen, CPU and bus speed have high utilization rate, the software interrupt response time is short, the network throughput is high and system performance is good.

Description

A kind of data package dispatching method
Technical field
The present invention relates to the reliability guard method of the Internet, relate in particular to a kind of raising network system properties data pack receiving and transmitting method.
Background technology
Along with the accelerated development in information-based process epoch, the Internet progressively penetrates in people's the life.In order to satisfy people to service and the more and more abundanter requirement of network application, operator is constantly developing new business, and the development of new business must be considered the performance of network.As everyone knows, the influencing factor of the fine or not most critical of systematic function is the transmitting-receiving of packet in the network system.
Existing data package dispatching method may further comprise the steps:
Step S101, NIC driver receives packet;
Step S102 produces hardware interrupts;
Step S103, the kernel spacing of notifying operation system receives said packet;
Step S104 calls the software interrupt service routine of said operating system and through IP stack said packet is carried out memory copying one and copies user's space to from the kernel spacing of operating system;
Step S105, the upper level applications of said user's space is handled said packet;
Step S106 calls the software interrupt service routine of said operating system, through IP stack the packet after handling is carried out another time memory copying-copy to from user's space kernel spacing of operating system;
Step S107, said NIC driver is sent said packet, finishes.
By on can find out; In the receiving/transmission method of above-mentioned packet; Because the upper level applications of said user's space can't be directly the packet of the kernel spacing of operating system is carried out read-write operation; Therefore need carry out twice copy and carry out system call continually packet through IP stack, with so utilizing of the utilance of CPU and bus bandwidth is low, the software interrupt response time is grown, entire system efficient is low, network throughput is little.Therefore systematic function is poor.
Therefore, be necessary to provide a kind of improved data package dispatching method to overcome the defective of prior art.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of data package dispatching method, can improve the utilance of CPU and the utilance of bus bandwidth, shortens the software interrupt response time, elevator system whole efficiency and network throughput, and then improve systematic function.
To achieve these goals, the invention provides a kind of data package dispatching method, comprise the steps: in the physical memory of network interface card, to be provided with one section as the space of buffer memory and set up the upper level applications of user's space and the mapping relations of said buffer memory; Network interface card hardware receives packet; Said packet is write said buffer memory; Produce hardware interrupts; Call network interface card software interrupt service routine and notify NIC driver to receive the packet in the said buffer memory, said NIC driver and then notify the upper level applications of said user's space to receive the packet in the said buffer memory; Said upper level applications receives the packet in the said buffer memory and said packet is handled; Call said network interface card software interrupt service routine and notify said NIC driver to send said packet; Said NIC driver is sent said packet.
In one embodiment of the invention, also comprise before the step of said network interface card hardware reception packet: set up working set.
Preferably, the said step that said packet is write said buffer memory is specially: through the direct memory access (DMA) data transfer mode said packet is write said buffer memory.
Equally preferably, said NIC driver and then the step of notifying the upper level applications of said user's space to receive the packet in the said buffer memory are specially: said NIC driver and then take asynchronous communication means to notify the upper level applications of said user's space to receive the packet in the said buffer memory; The said step of notifying said NIC driver to send said packet is specially: take asynchronous communication means to notify said NIC driver to send said packet.
In another embodiment of the present invention, whether said upper level applications: it is normal to detect said upper level applications packet receiving if also comprising before receiving the step of the packet in the said buffer memory; When detecting the normal packet receiving of said upper level applications, said NIC driver changes mode of operation state over to.
Preferably, said method also comprises step: when detecting the undesired packet receiving of said upper level applications, said NIC driver changes the protected mode state automatically over to and sends said packet according to pre-configured rule.
An embodiment more of the present invention in, whether normal said NIC driver also comprise before detecting said upper level applications packet receiving step: set up the bag buffering area; Said buffer area packet is sent to said buffering area, and then said upper level applications receives the packet in the said buffer memory and said packet is carried out processed steps and is specially: said upper level applications reception is sent to the packet of said buffering area via said buffer memory and said packet is handled.
Compared with prior art; Data package dispatching method of the present invention can carry out alternately through the upper level applications of user's space and the mapping relations upper level applications direct and user's space of network interface card buffer memory when receiving or send packet; Need not utilize the IP stack of operating system that packet is carried out the kernel spacing of operating system and twice copy between the user's space; A large amount of unnecessary software interrupt can not appear; Thereby this method improved the utilance of CPU and bus bandwidth, shortened the software interrupt response time, greatly promoted entire system efficient and network throughput.Therefore systematic function is good.
Description of drawings
Fig. 1 is the flow chart of prior art data package dispatching method.
Fig. 2 is the flow chart of first embodiment of data package dispatching method of the present invention.
Fig. 3 is the flow chart of second embodiment of data package dispatching method of the present invention.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label is represented similar elements in the accompanying drawing.As stated; The invention provides a kind of data package dispatching method; Need not to utilize the IP stack of operating system that packet is carried out the kernel spacing of operating system and twice copy between the user's space; Can carry out alternately through the upper level applications of user's space and the mapping relations upper level applications direct and user's space of network interface card buffer memory; A large amount of unnecessary software interrupt can not occur, the utilance of CPU and the utilance of bus bandwidth are big, the software interrupt response time short, entire system efficient height and network throughput is big, systematic function is good.To set forth in detail below.
With reference to figure 2, present embodiment one data package dispatching method comprises the steps:
Step S201 is provided with one section as the space of buffer memory and set up the upper level applications of user's space and the mapping relations of said buffer memory in the physical memory of network interface card;
Step S202 sets up working set;
Step S203, network interface card hardware receives packet;
Step S204 writes said buffer memory through direct memory access (DMA) (DMA, Direct Memory Access) data transfer mode with said packet;
Step S205 produces hardware interrupts;
Step S206 calls network interface card software interrupt service routine and notifies NIC driver to receive the packet in the said buffer memory;
Step S207 judges whether the upper level applications of said user's space need carry out packet receiving, if, change step S209, if not, step S208 continued;
Step S208, said NIC driver is sent said packet according to pre-configured rule, finishes;
Step S209, said NIC driver takes asynchronous communication means to notify the upper level applications of said user's space to receive the packet in the said buffer memory;
Step S210, said upper level applications is visited the address of said buffer memory, receives in the said buffer address corresponding packet, and to said packet analyze, processing such as modification;
Step S211 calls said network interface card software interrupt service routine, and said upper level applications takes asynchronous communication means to notify said NIC driver to send said packet;
Step S212, said NIC driver is sent said packet, finishes.
By on can find out; The present embodiment data package dispatching method can carry out alternately through the upper level applications of user's space and the mapping relations upper level applications direct and user's space of network interface card buffer memory when receiving or send packet; Need not utilize the IP stack of operating system that packet is carried out the kernel spacing of operating system and twice copy between the user's space; A large amount of unnecessary software interrupt can not appear; Thereby this method improved the utilance of CPU, the utilance of bus bandwidth, shortened the software interrupt response time, greatly promoted entire system efficient and network throughput.Therefore systematic function is good.
In addition, said direct memory access (DMA) data transfer mode transmission speed is very fast, has reduced the intervention of CPU, can significantly improve system effectiveness.The foundation of said working set can be confirmed the relation of a plurality of network interface card collaborative works.
With reference to figure 3, present embodiment two data package dispatching methods comprise the steps:
Step S301 is provided with one section as the space of buffer memory and set up the upper level applications of user's space and the mapping relations of said buffer memory in the physical memory of network interface card;
Step S302 sets up working set;
Step S303 sets up the bag buffering area;
Step S304, network interface card hardware receives packet;
Step S305 writes said buffer memory through the direct memory access (DMA) data transfer mode with said packet;
Step S306 produces hardware interrupts;
Step S307 calls network interface card software interrupt service routine and notifies NIC driver to receive the packet in the said buffer memory;
Step S308 judges whether the upper level applications of said user's space need carry out packet receiving, if, change step S310, if not, step S309 continued;
Step S309, said NIC driver is sent said packet according to pre-configured rule, finishes;
Step S310, said NIC driver takes asynchronous communication means to notify the upper level applications of said user's space to receive the packet in the said buffer memory;
Step S311 is sent to said buffering area with packet corresponding in the said buffer address;
Step S312, whether normal, when detecting the undesired packet receiving of said upper level applications, continue step S313 if periodically detecting said upper level applications packet receiving, when detecting the normal packet receiving of said upper level applications, change step S314;
Step S313, said NIC driver changes protected mode (PASSBY) state automatically over to, changes step S309;
Step S314, said NIC driver changes operational mode (DELIVER) state over to;
Step S315, said upper level applications receive via said buffer memory be sent to said buffering area packet and to said packet analyze, processing such as modification;
Step S316 calls said network interface card software interrupt service routine, and said upper level applications takes asynchronous communication means to notify said NIC driver to send said packet;
Step S317, said NIC driver is sent said packet, finishes;
By on can find out; It is mutual that the present embodiment data package dispatching method can not only realize that upper level applications and the network interface card of user's space drive, and entire system efficient is high, network throughput is big, systematic function good, and the periodicity testing mechanism of introducing in addition to upper level applications can guarantee the unimpeded of network system operation; Under the situation of software upgrading even software fault; Network system can both fast reaction, thereby successfully realizes the protection to network system, and the reliability and stability of system are high.Through test, the longest failure response time of method of present embodiment has reached the carrier level reliability requirement.
In addition, present embodiment is stored the packet of a period of time through setting up buffering area, avoids packet in processing procedure, to lose, and then has increased the reliability of system.In addition, said upper level applications can directly be visited said bag buffering area, reduces the copy of internal memory.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.

Claims (1)

1. a data package dispatching method comprises the steps:
Step S301 is provided with one section as the space of buffer memory and set up the upper level applications of user's space and the mapping relations of said buffer memory in the physical memory of network interface card;
Step S302 sets up working set;
Step S303 sets up the bag buffering area;
Step S304, network interface card hardware receives packet;
Step S305 writes said buffer memory through the direct memory access (DMA) data transfer mode with said packet;
Step S306 produces hardware interrupts;
Step S307 calls network interface card software interrupt service routine and notifies NIC driver to receive the packet in the said buffer memory;
Step S308 judges whether the upper level applications of said user's space need carry out packet receiving, if, change step S310, if not, step S309 continued;
Step S309, said NIC driver is sent said packet according to pre-configured rule, finishes;
Step S310, said NIC driver takes asynchronous communication means to notify the upper level applications of said user's space to receive the packet in the said buffer memory;
Step S311 is sent to said buffering area with packet corresponding in the said buffer address;
Step S312, whether normal, when detecting the undesired packet receiving of said upper level applications, continue step S313 if periodically detecting said upper level applications packet receiving, when detecting the normal packet receiving of said upper level applications, change step S314;
Step S313, said NIC driver changes the protected mode state automatically over to, changes step S309;
Step S314, said NIC driver changes mode of operation state over to;
Step S315, said upper level applications reception is sent to the packet of said buffering area via said buffer memory and said packet is handled;
Step S316 calls said network interface card software interrupt service routine, and said upper level applications takes asynchronous communication means to notify said NIC driver to send said packet;
Step S317, said NIC driver is sent said packet, finishes.
CN2009102728440A 2009-11-24 2009-11-24 Data package transmit-receive method Active CN101702688B (en)

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CN107124374A (en) * 2017-05-15 2017-09-01 郑州云海信息技术有限公司 A kind of interface for lifting network interface card send and receive packets performance, method and system
CN107231679B (en) * 2017-06-20 2020-04-14 维沃移动通信有限公司 Data packet processing method and mobile terminal
EP3929756A1 (en) * 2017-09-05 2021-12-29 Huawei Technologies Co., Ltd. Method, system, and intelligent network interface card for migrating data
CN108123894B (en) * 2017-12-22 2021-02-26 湖南卫导信息科技有限公司 Method for realizing low-delay transmission of sampled data stream based on Intel gigabit network card
CN109257300A (en) * 2018-09-10 2019-01-22 湖北微源卓越科技有限公司 A kind of storage method and device of network packet
CN111124506A (en) * 2019-11-12 2020-05-08 中国电子科技集团公司第三十研究所 Operation card driving implementation method based on application layer
CN111181736B (en) * 2019-12-31 2022-04-05 奇安信科技集团股份有限公司 Data transmission method, device, system and medium
CN111447046B (en) * 2020-03-26 2023-04-25 广州市百果园信息技术有限公司 Service data transmission method, device, equipment and storage medium
CN113596038B (en) * 2021-08-02 2023-04-07 武汉绿色网络信息服务有限责任公司 Data packet parsing method and server
CN113747087B (en) * 2021-09-10 2023-09-19 湖南君瀚信息技术有限公司 Remote driving low-delay image transmission method, device, computer equipment and medium
CN115086310B (en) * 2022-03-02 2023-08-01 华东师范大学 High-throughput low-delay data packet forwarding method

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