CN117176809A - Data interaction method and system - Google Patents
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Abstract
The application provides a data interaction method and a system, wherein the method is applied to a network card connected with a host, the network card is provided with a data receiving module, a data transmitting module, a transmitting cache module and a redundancy detecting module, and the method comprises the following steps: when the network card transmits data, the network card transmits a data packet received from a host at a transmitting end to a receiving end through a data transmitting module, synchronously stores the data packet into a transmitting buffer module, and transmits a confirmation character response to the transmitting buffer module through a redundancy detection module based on a TCP serial number fed back by the receiving end, wherein the transmitting buffer module retransmits the data or deletes the buffered data packet based on the confirmation character response; when the network card receives data, the network card receives the data packet sent by the sending end through the data receiving module, analyzes the TCP serial number of the data packet and feeds back to the sending end.
Description
Technical Field
The present application relates to the field of data transmission technologies, and in particular, to a data interaction method and system.
Background
Computer networks have been an important component of human society, with significant development prospects in the current time of information explosion. A computer network can be characterized as a collection of geographically dispersed and independent computers interconnected according to a network protocol that is the basis of the entire computer network. Computer networks have undergone a simple to complex, low-level to high-level development process. In the course of computer network development, network protocols have also evolved.
The advent of the TCP/IP protocol has enabled inter-communication between different subnets, which were previously inter-communication within a local area network, to which the development of the internet has entered a new phase. The TCP protocol belongs to the transport layer protocol in the OSI seven layer reference model or the TCP/IP four layer reference model. This is a connection-oriented, reliable, byte stream based communication protocol.
However, in the conventional scheme of performing network communication through TCP, a CPU at a host end often performs transmission processing, which causes excessive processing pressure of the CPU.
Disclosure of Invention
In view of the above, embodiments of the present application provide a data interaction method to obviate or ameliorate one or more of the disadvantages of the prior art.
One aspect of the present application provides a data interaction method, where the method is applied to a network card connected to a host, the network card is provided with a data receiving module, a data sending module, a sending buffer module and a redundancy detecting module, and the method includes the steps of:
when the network card transmits data, the network card transmits a data packet received from a host at a transmitting end to a receiving end through a data transmitting module, synchronously stores the data packet into a transmitting buffer module, and transmits a confirmation character response to the transmitting buffer module through a redundancy detection module based on a TCP serial number fed back by the receiving end, wherein the transmitting buffer module retransmits the data or deletes the buffered data packet based on the confirmation character response;
when the network card receives data, the network card receives the data packet sent by the sending end through the data receiving module, analyzes the TCP serial number of the data packet and feeds back to the sending end.
By adopting the scheme, when the network card of the scheme is used for judging data transmission, a host is not required to participate in judging the data transmission, retransmission judgment can be carried out through interaction between the sending end and the receiving end, whether redundant TCP serial numbers exist or not is judged through the redundancy detection module in the network card, if the situation that the TCP serial numbers are redundant exists, the sending buffer module is informed to carry out retransmission, and if the situation that the TCP serial numbers are redundant does not exist, the sending buffer module is informed to delete corresponding data packets, and storage pressure is timely reduced.
In some embodiments of the present application, in the step of the network card receiving, through the data receiving module, the data packet sent by the sending end, the network card transmits the received data packet to the receiving end host.
In some embodiments of the present application, in the step of the sending buffer module retransmitting data or deleting data of the buffered data packet based on the acknowledgement character response determination, if the sending buffer module retransmits data based on the acknowledgement character response determination, the sending buffer module matches a corresponding data packet based on the acknowledgement character, and transmits the data packet to the data sending module, and the data sending module sends the data packet to the receiving end.
In some embodiments of the present application, in the step of performing, by the redundancy detection module, the acknowledgement character response to the sending buffer module based on the TCP sequence number fed back by the receiving end,
the redundancy detection module determines a TCP sequence number to be received based on the received TCP sequence number;
if the TCP serial number to be received is the same TCP serial number in a continuous preset time, a confirmation character response is carried out to the sending buffer module, so that the sending buffer module of the network card carries out data retransmission and retransmits a data packet corresponding to the TCP serial number.
In some embodiments of the present application, in the step of performing the acknowledgement character response to the sending buffer module if the TCP sequence number to be received is continuously preset for the same TCP sequence number, the preset number may be 3 times.
In some embodiments of the application, in the step of the redundancy detection module determining a TCP sequence number to be received based on a received TCP sequence number,
and the redundancy detection module constructs a sequence number queue based on the received TCP sequence number, traverses from the head of the sequence number queue to the tail of the sequence number queue, and takes the first missing TCP sequence number as the TCP sequence number to be received.
In some embodiments of the present application, the step of performing, by the redundancy detection module, a confirmation character response to the sending buffer module based on the TCP sequence number fed back by the receiving end;
the redundancy detection module traverses the sequence number queue after receiving one TCP sequence number;
if a preset number of received TCP serial numbers exist after any one of the missing TCP serial numbers in the serial number queue, a confirmation character response is carried out on the basis of the missing TCP serial numbers to the sending cache module, so that the sending cache module of the network card carries out data retransmission and retransmits a data packet corresponding to the TCP serial number.
In some embodiments of the present application, in the step of performing, by the redundancy detection module, the acknowledgement character response to the sending buffer module based on the TCP sequence number fed back by the receiving end,
the redundancy detection module determines that the received data packet is completed based on the TCP serial number to be received;
and carrying out confirmation character response on the transmission buffer module of the network card connected with the host computer of the transmitting end based on the received data packet, so that the transmission buffer module carries out data deletion, and the received data packet is deleted.
In some embodiments of the present application, in the step of performing, by the redundancy detection module, the acknowledgement character response to the sending buffer module based on the TCP sequence number fed back by the receiving end,
if a certain TCP serial number is determined to be the TCP serial number to be received for the first time, the data packet corresponding to the TCP serial number is not received within a preset time period;
and then, carrying out a character confirmation response to the sending buffer module, enabling the sending buffer module of the network card to carry out data retransmission, and retransmitting the data packet corresponding to the TCP serial number.
The second aspect of the present application also provides a data interaction system comprising a computer device comprising a processor and a memory, the memory having stored therein computer instructions for executing the computer instructions stored in the memory, the system implementing the steps of the method as hereinbefore described when the computer instructions are executed by the processor.
The third aspect of the present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor realizes the steps implemented by the aforementioned data interaction method.
Additional advantages, objects, and features of the application will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present application are not limited to the above-described specific ones, and that the above and other objects that can be achieved with the present application will be more clearly understood from the following detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and together with the description serve to explain the application.
FIG. 1 is a schematic diagram of a processing architecture of the data interaction method;
FIG. 2 is a schematic diagram of a process when the network card performs data transmission;
fig. 3 is a schematic diagram of a process when the network card receives data.
Detailed Description
The present application will be described in further detail with reference to the following embodiments and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. The exemplary embodiments of the present application and the descriptions thereof are used herein to explain the present application, but are not intended to limit the application.
It should be noted here that, in order to avoid obscuring the present application due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present application are shown in the drawings, while other details not greatly related to the present application are omitted.
The method specifically comprises the following steps:
as shown in fig. 1, 2 and 3, the present application proposes a data interaction method, where the method is applied to a network card connected to a host, the network card is provided with a data receiving module, a data sending module, a sending buffer module and a redundancy detecting module, and the steps of the method include:
in the implementation process, the host computer and the network card are connected through a peripheral component interconnect express (Peripheral Component Interconnect Express, PCIe).
In a specific implementation process, an intelligent Chip is arranged in the network card, and the intelligent Chip can be a field programmable gate array (Field Programmable gate array, FPGA), a System on Chip (SoC) and the like.
In a specific implementation process, the host may be a computer or a server.
In some embodiments of the present application, when the network card performs data transmission, the network card sends a data packet received from a host at a transmitting end to a receiving end through a data sending module, and synchronously stores the data packet in a sending buffer module, and performs acknowledgement character response to the sending buffer module through a redundancy detection module based on a TCP serial number fed back by the receiving end, where the sending buffer module determines to retransmit data or delete data of the buffered data packet based on the acknowledgement character response;
in the implementation process, the data sending module synchronously stores the data packet into the sending buffer module for subsequent data retransmission while sending the data packet to the receiving end.
In a specific implementation process, the sending buffer module of the scheme adopts DDR to store data.
In the implementation process, the demands of services requiring low latency and high bandwidth such as virtualization, micro-service architecture, private cloud and the like are increasing at present, and the processing capacity of a computer CPU is challenging. The hardware acceleration is used as a technical scheme to effectively solve the problem, the network card connected with the host machine can meet the requirement of intensive service calculation, and the service processing cost performance is improved.
In some embodiments of the present application, when the network card receives data, the network card receives a data packet sent by a sending end through a data receiving module, parses a TCP sequence number of the data packet, and feeds back to the sending end.
In the implementation process, the network card transmits the received data packet to the receiving end host after analyzing the TCP serial number of the data packet.
In a specific implementation process, the data receiving module analyzes a TCP serial number of a start byte in a data packet, and takes the TCP serial number of the start byte as the TCP serial number of the data packet.
By adopting the scheme, when the network card of the scheme is used for judging data transmission, a host is not required to participate in judging the data transmission, retransmission judgment can be carried out through interaction between the sending end and the receiving end, whether redundant TCP serial numbers exist or not is judged through the redundancy detection module in the network card, if the situation that the TCP serial numbers are redundant exists, the sending buffer module is informed to carry out retransmission, and if the situation that the TCP serial numbers are redundant does not exist, the sending buffer module is informed to delete corresponding data packets, and storage pressure is timely reduced.
In some embodiments of the present application, in the step of the network card receiving, through the data receiving module, the data packet sent by the sending end, the network card transmits the received data packet to the receiving end host.
In some embodiments of the present application, in the step of the sending buffer module retransmitting data or deleting data of the buffered data packet based on the acknowledgement character response determination, if the sending buffer module retransmits data based on the acknowledgement character response determination, the sending buffer module matches a corresponding data packet based on the acknowledgement character, and transmits the data packet to the data sending module, and the data sending module sends the data packet to the receiving end.
In some embodiments of the present application, in the step of performing, by the redundancy detection module, the acknowledgement character response to the sending buffer module based on the TCP sequence number fed back by the receiving end,
the redundancy detection module determines a TCP sequence number to be received based on the received TCP sequence number;
if the TCP serial number to be received is the same TCP serial number in a continuous preset time, a confirmation character response is carried out to the sending buffer module, so that the sending buffer module of the network card carries out data retransmission and retransmits a data packet corresponding to the TCP serial number.
By adopting the scheme, if the TCP serial numbers to be received are the same in continuous preset times, the situation that the data packets corresponding to the TCP serial numbers are most likely to be lost is described, and the transmission buffer module of the network card is enabled to retransmit data to prevent data from being missed.
In some embodiments of the present application, in the step of performing the acknowledgement character response to the sending buffer module if the TCP sequence number to be received is continuously preset for the same TCP sequence number, the preset number may be 3 times.
In some embodiments of the application, in the step of the redundancy detection module determining a TCP sequence number to be received based on a received TCP sequence number,
and the redundancy detection module constructs a sequence number queue based on the received TCP sequence number, traverses from the head of the sequence number queue to the tail of the sequence number queue, and takes the first missing TCP sequence number as the TCP sequence number to be received.
In the implementation process, the received TCP sequence numbers should be 1, 2, 3, 4, 5, and 6 in sequence, if the received TCP sequence numbers are 1, 2, 4, and 6 in sequence, a sequence number queue is constructed to be 1, 2, 4, and 6, the first missing TCP sequence number is 3, and the TCP sequence number 3 is taken as the TCP sequence number to be received.
In the implementation process, if the received TCP sequence numbers are 1, 2, 4, 6 and 7 in sequence, the TCP sequence number to be received is fed back to be 3 once when the TCP sequence numbers 4, 6 and 7 are received, and if the preset number of times is 3, the sending buffer module of the network card is enabled to retransmit data and resend the data packet corresponding to the TCP sequence number 3.
In some embodiments of the present application, the step of performing, by the redundancy detection module, a confirmation character response to the sending buffer module based on the TCP sequence number fed back by the receiving end;
the redundancy detection module traverses the sequence number queue after receiving one TCP sequence number;
if a preset number of received TCP serial numbers exist after any one of the missing TCP serial numbers in the serial number queue, a confirmation character response is carried out on the basis of the missing TCP serial numbers to the sending cache module, so that the sending cache module of the network card carries out data retransmission and retransmits a data packet corresponding to the TCP serial number.
In a specific implementation process, the preset number may be 2, 3 or 4, and preferably 3.
For example, the preset number is set to be 3, if the TCP sequence numbers received by the receiving end are 1, 2, 4, 6 and 7 in sequence, the missing TCP sequence numbers are 3 and 5, when the TCP sequence numbers 4, 6 and 7 are received, the sending end feeds back the TCP sequence number to be received once to the sending end, and if the TCP sequence number 3 has feedback of the TCP sequence number to be received for 3 times, the sending end retransmits the data packet corresponding to the TCP sequence number 3, and retransmits the data packet corresponding to the TCP sequence number; if the data packet received by the receiving end at the next time is the data packet corresponding to the TCP serial number 8, feeding back the TCP serial number to be received to be 3 again; if the data packet received by the receiving end again is the data packet corresponding to the TCP sequence number 3, the sequence number queues are 1, 2, 3, 4, 6, 7 and 8, and the TCP sequence number to be received is fed back to be 5 for the first time, but 3 TCP sequence numbers 6, 7 and 8 exist behind the missing TCP sequence number 5, and the sending buffer module of the network card is enabled to retransmit the data and resend the data packet corresponding to the TCP sequence number 5.
By adopting the scheme, when a preset number of received TCP serial numbers exist after any one missing TCP serial number, the missing TCP serial number is retransmitted, and if a judging data retransmission mode based on the TCP serial number to be received is only adopted, in the example, the TCP serial number which needs to be waited for to be received twice is not TCP serial number 5, but at the moment, the TCP serial number 5 has waited for the transmission of 5 data packets, and the situation that the data packets corresponding to the TCP serial number 5 are lost can be judged, the scheme can be more suitable for the situation that a plurality of TCP serial numbers are missing, the influence of the transmission of the data packets which are lost in the past on the subsequent transmission can be further prevented, and the transmission efficiency is improved.
In some embodiments of the present application, in the step of performing, by the redundancy detection module, the acknowledgement character response to the sending buffer module based on the TCP sequence number fed back by the receiving end,
the redundancy detection module determines that the received data packet is completed based on the TCP serial number to be received;
and carrying out confirmation character response on the transmission buffer module of the network card connected with the host computer of the transmitting end based on the received data packet, so that the transmission buffer module carries out data deletion, and the received data packet is deleted.
By adopting the scheme, the data packet which is already transmitted can be timely cleared from the transmission buffer module, and the storage pressure of the transmission buffer module is reduced.
In some embodiments of the present application, in the step of performing, by the redundancy detection module, the acknowledgement character response to the sending buffer module based on the TCP sequence number fed back by the receiving end,
if a certain TCP serial number is determined to be the TCP serial number to be received for the first time, the data packet corresponding to the TCP serial number is not received within a preset time period;
and then, carrying out a character confirmation response to the sending buffer module, enabling the sending buffer module of the network card to carry out data retransmission, and retransmitting the data packet corresponding to the TCP serial number.
By adopting the scheme, whether data retransmission is carried out or not is further judged through time, and the transmission efficiency is improved through overtime retransmission.
The prior art is that TCP message processing is performed through a software protocol stack, TCP link establishment is managed through a kernel program running on a CPU, and messages are sent and received. The application solidifies the function of the acknowledgement character mechanism (Acknowledge character, ACK) which is a key mechanism of reliability in the TCP protocol in hardware.
The application is based on the hardware acceleration technology and aims at the function of fast retransmission in the TCP stack to carry out hardware acceleration optimization. The TCP is used for providing reliable network transmission, and is processed by the CPU through a software protocol stack for a long time.
The beneficial effects of the application include:
1. if the TCP serial number to be received is the same TCP serial number in a continuous preset time, immediately retransmitting the data, and retransmitting the lost data packet without waiting for overtime retransmission. This avoids waiting delays and enables a quick resumption of data transmission. After receiving the retransmitted data packet, the sender updates the congestion window to reduce the sending rate and continues to send the subsequent data packet.
2. The quick retransmission mechanism of the application can recover lost data packets more quickly, thereby reducing delay of network transmission, and avoiding the occurrence of waiting time-out, which can cause longer idle time and affect transmission efficiency. By the quick retransmission machine, the TCP can be more flexibly adapted to the change of network conditions, and the efficiency and reliability of data transmission are improved.
3. The fast retransmission mechanism of the application can discover the lost data packet earlier and retransmit in time through judging the received TCP serial number after the missing TCP serial number. The mechanism can effectively improve the performance of data transmission, reduce delay and enhance the reliability of a network;
4. the fast retransmission mechanism is different from the implementation mode of the prior art software, can realize the functions in a hardware mode, reduces the participation of kernel states in the software, releases CPU resources, improves the system speed and reduces the network time delay.
The embodiment of the application also provides a data interaction system, which comprises a computer device, wherein the computer device comprises a processor and a memory, the memory is stored with computer instructions, the processor is used for executing the computer instructions stored in the memory, and the system realizes the steps realized by the method when the computer instructions are executed by the processor.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, realizes the steps realized by the aforementioned data interaction method. The computer readable storage medium may be a tangible storage medium such as Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, floppy disks, hard disk, a removable memory disk, a CD-ROM, or any other form of storage medium known in the art.
Those of ordinary skill in the art will appreciate that the various illustrative components, systems, and methods described in connection with the embodiments disclosed herein can be implemented as hardware, software, or a combination of both. The particular implementation is hardware or software dependent on the specific application of the solution and the design constraints. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave.
It should be understood that the application is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present application.
In this disclosure, features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations can be made to the embodiments of the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The data interaction method is characterized by being applied to a network card connected with a host, wherein the network card is provided with a data receiving module, a data sending module, a sending cache module and a redundancy detection module, and the method comprises the following steps:
when the network card transmits data, the network card transmits a data packet received from a host at a transmitting end to a receiving end through a data transmitting module, synchronously stores the data packet into a transmitting buffer module, and transmits a confirmation character response to the transmitting buffer module through a redundancy detection module based on a TCP serial number fed back by the receiving end, wherein the transmitting buffer module retransmits the data or deletes the buffered data packet based on the confirmation character response;
when the network card receives data, the network card receives the data packet sent by the sending end through the data receiving module, analyzes the TCP serial number of the data packet and feeds back to the sending end.
2. The data interaction method according to claim 1, wherein in the step of the network card receiving the data packet sent by the sender through the data receiving module, the network card transmits the received data packet to the host at the receiver.
3. The data interaction method according to claim 1, wherein in the step of the transmission buffer module retransmitting data or deleting data of the buffered data packet based on the acknowledgement character response determination, if the transmission buffer module retransmits data based on the acknowledgement character response determination, the corresponding data packet is matched in the transmission buffer module based on the acknowledgement character, the data packet is transmitted to the data transmission module, and is transmitted to the receiving end through the data transmission module.
4. The method for data interaction according to any one of claims 1 to 3, wherein in the step of performing the acknowledgement character response to the transmission buffer module based on the TCP sequence number fed back by the receiving end through the redundancy detecting module,
the redundancy detection module determines a TCP sequence number to be received based on the received TCP sequence number;
if the TCP serial number to be received is the same TCP serial number in a continuous preset time, a confirmation character response is carried out to the sending buffer module, so that the sending buffer module of the network card carries out data retransmission and retransmits a data packet corresponding to the TCP serial number.
5. The data interaction method according to claim 4, wherein in the step of performing the acknowledgement character response to the transmission buffer module if the TCP sequence number to be received is continuously preset for the same TCP sequence number, the preset number is 3.
6. The data interaction method according to claim 4, wherein in the step of the redundancy check module determining a TCP sequence number to be received based on the received TCP sequence number,
and the redundancy detection module constructs a sequence number queue based on the received TCP sequence number, traverses from the head of the sequence number queue to the tail of the sequence number queue, and takes the first missing TCP sequence number as the TCP sequence number to be received.
7. The data interaction method according to claim 6, wherein the step of performing, by the redundancy detection module, a confirmation character response to the transmission buffer module based on the TCP sequence number fed back by the receiving end;
the redundancy detection module traverses the sequence number queue after receiving one TCP sequence number;
if a preset number of received TCP serial numbers exist after any one of the missing TCP serial numbers in the serial number queue, a confirmation character response is carried out on the basis of the missing TCP serial numbers to the sending cache module, so that the sending cache module of the network card carries out data retransmission and retransmits a data packet corresponding to the TCP serial number.
8. The data interaction method according to claim 4, wherein in the step of performing the acknowledgement character response to the transmission buffer module based on the TCP sequence number fed back by the receiving end through the redundancy detection module,
the redundancy detection module determines that the received data packet is completed based on the TCP serial number to be received;
and carrying out confirmation character response on the transmission buffer module of the network card connected with the host computer of the transmitting end based on the received data packet, so that the transmission buffer module carries out data deletion, and the received data packet is deleted.
9. The data interaction method according to claim 4, wherein in the step of performing the acknowledgement character response to the transmission buffer module based on the TCP sequence number fed back by the receiving end through the redundancy detection module,
if a certain TCP serial number is determined to be the TCP serial number to be received for the first time, the data packet corresponding to the TCP serial number is not received within a preset time period;
and then, carrying out a character confirmation response to the sending buffer module, enabling the sending buffer module of the network card to carry out data retransmission, and retransmitting the data packet corresponding to the TCP serial number.
10. A data interaction system, characterized in that the system comprises a computer device comprising a processor and a memory, said memory having stored therein computer instructions, said processor being adapted to execute the computer instructions stored in said memory, the system realizing the steps of the method according to any of claims 1-9 when said computer instructions are executed by the processor.
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