CN107547329B - NTB-based double-control data transmission method and system - Google Patents
NTB-based double-control data transmission method and system Download PDFInfo
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- CN107547329B CN107547329B CN201710801298.XA CN201710801298A CN107547329B CN 107547329 B CN107547329 B CN 107547329B CN 201710801298 A CN201710801298 A CN 201710801298A CN 107547329 B CN107547329 B CN 107547329B
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- 238000012790 confirmation Methods 0.000 claims description 10
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Abstract
The application discloses a dual-control data transmission method and system based on NTB, comprising the following steps: the first communication platform transmits data to the second communication platform by using the transmission request index; after the data transmission to the second communication platform is completed, updating the data transmission index of the second communication platform; judging whether the transmission received index is updated or not in a polling mode; if yes, updating the transmission confirmed index of the second communication platform, and sending first transmission completion information to the first upper-layer system; the second communication platform judges whether the transmitted index of the data is updated or not in a polling mode; if so, updating the transmission received index of the first communication platform; judging whether the transmission confirmed index is updated or not in a polling mode; if yes, sending second transmission completion information to a second upper-layer system; in the application, the first communication platform and the second communication platform utilize a plurality of index counters to record each stage of data transmission, use the same transmission protocol and accelerate the transmission speed.
Description
Technical Field
The invention relates to the field of communication, in particular to a dual-control data transmission method and system based on NTB.
Background
A Non-Transparent Bridge (NTB), which is a point-to-point PCI-E bus that connects two systems, can provide a high-speed data communication link between the two systems. NTB is similar in function to a transparent bridge, but differs in that for NTB, both ends of the bridge have their own independent address spaces. The entire memory and IO space of the host system at one end of the bridge is not completely visible to the host system at the other end of the bridge.
The NTB provides one or more memory read/write windows to the local system, and some read/write operations to these windows are mapped to the memory of the remote system. Therefore, after configuring the relevant register and establishing the NTB communication link, the local system can read and write the relevant memory area of the remote system as reading and writing the local memory.
In the prior art, each communication needs to make a judgment on sending or receiving, a large amount of extra overhead is needed, and two communication parties need to negotiate on data formats, for example, data sending frames, receiving confirmation frames, transmission completion frames and the like, and different data formats need to be formulated in advance, so after a system receives a message sent by an opposite end, the data needs to be analyzed first to confirm the message type, so that the whole transmission process is very complex, and meanwhile, in a single data transmission process, the data transmission progress and the transmission stage cannot be embodied; after multiple data transmissions, the index value cannot represent the number of data packets.
Therefore, how to provide an NTB-based dual-control data transmission method that can accurately reflect the transmission stage and has high transmission efficiency is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a dual-control data transmission method and system based on NTB, which can accurately reflect the transmission stage and has high transmission efficiency. The specific scheme is as follows:
a dual-control data transmission method based on NTB comprises the following steps:
the first communication platform transmits data to the second communication platform by using the transmission request index;
after the first communication platform finishes transmitting data to the second communication platform, the first communication platform updates the data transmission index of the second communication platform;
the second communication platform judges whether the transmitted index of the data is updated or not in a polling mode;
if so, the second communication platform updates the transmission received index of the first communication platform;
the first communication platform judges whether the index received by transmission is updated or not in a polling mode;
if so, the first communication platform updates the transmission confirmed index of the second communication platform, and sends first transmission completion information to a first upper system;
the second communication platform judges whether the transmission confirmed index is updated or not in a polling mode;
and if so, sending second transmission completion information to a second upper-layer system.
Optionally, after the first communication platform sends the first transmission completion information to the first upper system, the method further includes:
the first communication platform generates a transfer completed index to mark local transfer control block free.
Optionally, after the second communication platform determines that the index for data transmission is updated in a polling manner, before the second communication platform updates the index for transmission of the first communication platform, the method further includes:
the second communication platform judges whether the data transmission process is error-free or not by using a local error log register;
if not, the second communication platform updates the transmission failure index of the first communication platform;
if so, the second communication platform updates the transmission received index of the first communication platform.
Optionally, after the first communication platform determines that the transmission received index is updated in a polling manner, before the first communication platform updates the transmission confirmed index of the second communication platform, the method further includes:
the first communication platform judges whether the data transmission process is error-free or not by using a local error log register;
if not, the first communication platform updates the transmission failure index of the second communication platform;
if so, the first communication platform updates the transmission confirmed index of the second communication platform.
The invention also discloses a dual-control data transmission system based on NTB, comprising:
the first communication platform comprises a data transmission module, a data transmission confirmation module, an index updating judgment module, a transmission confirmation module and a completion uploading module; the data transmission module is used for transmitting data to the second communication platform by using the transmission request index; the data transmission confirming module is used for updating the data transmission index of the second communication platform after the data transmission to the second communication platform is completed; the index updating judging module is used for judging whether the index received by transmission is updated or not in a polling mode; the transmission confirmation module is used for updating the transmission confirmed index of the second communication platform when the index updating judgment module judges that the transmission received index is updated; the completion uploading module is used for sending first transmission completion information to a first upper-layer system;
the second communication platform comprises a first index judgment module, a transmission receiving module, a second index judgment module and an uploading completion module; the first index judging module is used for judging whether the index of the transmitted data is updated in a polling mode; the transmission receiving module is used for updating the transmission received index of the first communication platform when the first index judging module judges that the data transmission index is updated; the second index judging module is used for judging whether the transmission confirmed index is updated or not in a polling mode; and the completion uploading module is used for sending second transmission completion information to a second upper-layer system when the second index judgment module judges that the transmission confirmed index is updated.
Optionally, the first communication platform further includes:
an idle marking module to generate a first transmission completed index to mark the first transmission control block as idle.
Optionally, the second communication platform further includes:
the error judgment module is used for judging whether the data transmission process is error-free or not by utilizing a local error log register;
if not, updating the transmission failure index of the first communication platform;
if so, updating the transmission received index of the first communication platform.
Optionally, the first communication platform further includes:
the error judgment module is used for judging whether the data transmission process is error-free or not by utilizing a local error log register;
if not, updating the transmission failure index of the second communication platform;
and if so, updating the transmission confirmed index of the second communication platform.
In the invention, the NTB-based double-control data transmission method comprises the following steps: the first communication platform transmits data to the second communication platform by using the transmission request index; after the first communication platform finishes transmitting data to the second communication platform, the first communication platform updates the data transmission index of the second communication platform; the second communication platform judges whether the transmitted index of the data is updated or not in a polling mode; if yes, the second communication platform updates the transmission received index of the first communication platform; the first communication platform judges whether the index received by transmission is updated or not in a polling mode; if so, the first communication platform updates the transmission confirmed index of the second communication platform, and sends the first transmission completion information to the first upper system; the second communication platform judges whether the transmission confirmed index is updated or not in a polling mode; and if so, sending second transmission completion information to a second upper-layer system.
The first communication platform and the second communication platform use respective local main control blocks to update the index value in the index counter corresponding to the state of each step, and use the transmission request index, the data transmitted index, the transmission received index and the transmission confirmed index, so that each communication platform can clearly know which stage the data transmission is in through the index value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart of a dual-control data transmission method based on NTB according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an NTB-based dual-control data transmission system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a dual-control data transmission method based on NTB (network transport Block), which is shown in figure 1 and comprises the following steps:
step S11: the first communication platform transmits data to the second communication platform by using the transmission request index.
Specifically, the first communication platform searches for an idle local transmission control block in a local transmission control block buffer by using a send request function, where the idle local transmission control block is a local transmission control block without a data transmission task in the first communication platform, the first communication platform generates a transmission request index as an index of the local transmission control block by using a local master control block, an index value of a transmission request index counter corresponding to the transmission request index in the local master control block polled by the scheduling function of the first communication platform is changed, for example, the previous polling result of the index value of the transmission request index counter of the first communication platform is 5, when the scheduling function of the first communication platform polls the transmission request index counter again to obtain that the index value of the transmission request index counter is changed to 6, it is proved that the index value of the transmission request index counter is changed, and generating a new transmission request index, and transmitting data to the second communication platform by the first communication platform.
Step S12: and after the first communication platform finishes transmitting the data to the second communication platform, the first communication platform updates the data transmission index of the second communication platform.
Specifically, after the first communication platform finishes transmitting data to the second communication platform, the first communication platform updates the index value of the data transmitted index counter corresponding to the data transmitted index in the local main control module of the second communication platform by using the local main control module, so as to update the data transmitted index of the second communication platform.
Step S13: and the second communication platform judges whether the transmitted index of the data is updated or not in a polling mode.
Specifically, the second communication platform judges whether the index value of the index counter of the transmitted data in the local main control block is updated by using a scheduling function in a polling mode.
Step S14: if so, the second communication platform updates the transmission received index of the first communication platform.
Specifically, when the second communication platform uses the scheduling function to poll that the index value of the data transmission index counter in the local main control block is updated, it indicates that the first communication platform has completed data transmission to the second communication platform, and the second communication platform uses the local main control block to update the index value of the transmission received index counter in the local main control block of the first communication platform, so as to update the transmission received index of the first communication platform, so that the first communication platform knows that the second communication platform receives data.
Step S15: the first communication platform judges whether the transmission received index is updated or not in a polling mode.
Specifically, the first communication platform determines whether the index value of the index counter transmitted and received in the local main control module is updated by using a scheduling function in a polling manner.
Step S16: if so, the first communication platform updates the transmission confirmed index of the second communication platform, and the first communication platform sends the first transmission completion information to the first upper system.
Specifically, when the first communication platform polls that the index value of the index counter received by the transmission in the local main control module is updated by using the scheduling function, the first communication platform learns that the second communication platform has successfully received the data sent by the local transmission control block of the first communication platform, and therefore, the first communication platform updates the index value of the index counter confirmed by the transmission in the local main control module of the second communication platform by using the local main control module, so that the second communication platform learns that the transmission process is completed, and the first communication platform generates first transmission completion information and sends the first transmission completion information to the upper system corresponding to the first communication platform to notify other upper components that the transmission is completed.
Step S17: and the second communication platform judges whether the transmission confirmed index is updated or not in a polling mode.
Specifically, the second communication platform determines whether the index value of the transmission confirmed index counter in the local master control block is updated by using a scheduling function in a polling manner.
Step S18: and if so, sending second transmission completion information to a second upper-layer system.
Specifically, when the second communication platform uses the scheduling function to poll that the index value of the transmission confirmed index counter in the local master control block is updated, the second communication platform confirms that the data transmission is successfully completed, and the second communication platform generates and sends second transmission completion information to the second upper system corresponding to the second communication platform and notifies other upper components that the transmission is completed.
It can be seen that, in the embodiment of the present invention, the first communication platform and the second communication platform both use their respective local master control blocks to update the index value in the index counter corresponding to the state of each step, and use the transmission request index, the data transmitted index, the transmission received index, and the transmission confirmed index, so that each communication platform can clearly know which stage the data transmission is in through the index value, and meanwhile, use the same transmission protocol, without negotiation of the protocol, and accelerate the transmission speed.
It should be noted that the first communication platform and the second communication platform are both the same communication platform, and functions of the first communication platform and the second communication platform can be interchanged with each other.
The embodiment of the invention discloses a specific NTB-based double-control data transmission method, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Specifically, the method comprises the following steps:
in the embodiment of the present invention, in order to further increase the system operation speed, after the first communication platform sends the first transmission completion information to the first upper system, the first communication platform may further generate a transmission completion index to mark that the local transmission control block is idle, so that the local transmission control block of the first communication platform can be quickly restored to the local transmission control block buffer to prepare for the next data transmission task.
Since the data transmission process and the index change are two separate communication processes, errors may occur in data transmission, for example, data verification failure and TLP packet damage, and the change of the index value may still be normal, so that a phenomenon that data transmission failure occurs but the two communication platforms still consider transmission success may occur, for this reason, in the above embodiment, after the second communication platform polls that the data transmission index has been updated, before the second communication platform updates that the transmission of the first communication platform has received the index, steps S21 to S23 may also be included; wherein the content of the first and second substances,
step S21: and the second communication platform judges whether the data transmission process is error-free or not by using the local error log register.
Specifically, the second communication platform determines whether the data transmission process is error-free by analyzing the error log recorded in the local error log register by using the local error log register which records whether the data transmission process is error-free.
Step S22: and if not, the second communication platform updates the transmission failure index of the first communication platform.
Specifically, if an error occurs in the data transmission process recorded in the local error log register of the second communication platform, the second communication platform updates the index value of the transmission failure index counter of the first communication platform by using the local master control block, so that the first communication platform knows that the data transmission fails.
Step S23: if so, the second communication platform updates the transmission received index of the first communication platform.
Further, after the first communication platform polls that the transmission received index has been updated, before the first communication platform updates the transmission confirmed index of the second communication platform, steps S24 to S26 may be further included; wherein the content of the first and second substances,
step S24: the first communication platform judges whether the data transmission process is error-free or not by using a local error log register.
Specifically, the first communication platform determines whether the data transmission process is error-free by analyzing an error log recorded in a local error log register by using the local error log register which records whether an error occurs in the data transmission process.
Step S25: and if not, the first communication platform updates the transmission failure index of the second communication platform.
Specifically, if an error occurs in the data transmission process recorded in the local error log register of the first communication platform, the first communication platform updates the index value of the transmission failure index counter of the second communication platform by using the local main control block, so that the second communication platform knows that the data transmission fails.
Step S26: if so, the first communication platform updates the transmission confirmed index of the second communication platform.
The error log register is an error log register of the PCIe link.
Correspondingly, the embodiment of the present invention further discloses an NTB-based dual-control data transmission system, which is shown in fig. 2 and includes:
the first communication platform 11 comprises a data transmission module 111, a data transmission confirmation module 112, an index updating judgment module 113, a transmission confirmation module 114 and an uploading completion module 115; the data transmission module 111 is configured to transmit data to the second communication platform 12 by using the transmission request index; a data transmission confirming module 112, configured to update the data transmission index of the second communication platform 12 after completing data transmission to the second communication platform 12; an index update judging module 113, configured to judge whether the index received by transmission is updated in a polling manner; a transmission confirmation module 114, configured to update the transmission confirmed index of the second communication platform 12 when the index update determination module 113 determines that the transmission received index is updated; a completion uploading module 115 for sending the first transmission completion information to the first upper system;
the second communication platform 12 includes a first index determining module 121, a transmission receiving module 122, a second index determining module 123 and an upload completion module 124; the first index determining module 121 is configured to determine whether the transmitted index of the data is updated in a polling manner; a transmission receiving module 122, configured to update the transmission received index of the first communication platform 11 when the first index determining module 121 determines that the data transmission index has been updated; a second index determining module 123, configured to determine whether the transmission confirmed index is updated in a polling manner; a completion uploading module 124, configured to send a second transmission completion message to the second upper-layer system when the second index determining module 123 determines that the transmission confirmed index has been updated.
It can be seen that, in the embodiment of the present invention, the first communication platform 11 and the second communication platform 12 both use their respective local master control blocks to update the index value in the index counter corresponding to the state of each step, and use the transmission request index, the data transmitted index, the transmission received index, and the transmission confirmed index, so that each communication platform can clearly know which stage the data transmission is in through the index value.
It should be noted that the first communication platform 11 and the second communication platform 12 are both the same communication platform, and functions of the two communication platforms may be interchanged with each other, in the embodiment of the present invention, the first communication platform 11 serves as a sending end, the second communication platform 12 serves as a receiving end, in other application scenarios, the second communication platform 12 serves as a sending end, and the first communication platform 11 serves as a receiving end, so as to implement function interchange, that is, each communication platform not only has a function of a sending end, but also has a function of a receiving end.
In this embodiment of the present invention, the first communication platform 11 may further include:
an idle marking module to generate a first transfer completed index to mark the first transfer control block as idle.
The error judgment module is used for judging whether the data transmission process is error-free or not by utilizing a local error log register;
if not, updating the transmission failure index of the second communication platform 12;
if so, the transmission received index of the second communication platform 12 is updated.
The second communication platform 12 may further include:
the error judgment module is used for judging whether the data transmission process is error-free or not by utilizing a local error log register;
if not, updating the transmission failure index of the first communication platform 11;
if so, the transmission confirmed index of the first communication platform 11 is updated.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.
The NTB-based dual-control data transmission method and system provided by the present invention are introduced in detail above, and a specific example is applied in the text to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A dual-control data transmission method based on NTB is characterized by comprising the following steps:
the first communication platform transmits data to the second communication platform by using the transmission request index;
after the first communication platform finishes transmitting data to the second communication platform, the first communication platform updates the data transmission index of the second communication platform;
the second communication platform judges whether the transmitted index of the data is updated or not in a polling mode;
if so, the second communication platform updates the transmission received index of the first communication platform;
the first communication platform judges whether the index received by transmission is updated or not in a polling mode;
if so, the first communication platform updates the transmission confirmed index of the second communication platform, and sends first transmission completion information to a first upper system;
the second communication platform judges whether the transmission confirmed index is updated or not in a polling mode;
and if so, sending second transmission completion information to a second upper-layer system.
2. The NTB-based dually-controlled data transmission method according to claim 1, wherein after the first communication platform sends the first transmission completion information to the first upper system, the method further comprises:
the first communication platform generates a transfer completed index to mark local transfer control block free.
3. The NTB-based dual-control data transmission method according to claim 1, wherein after the second communication platform determines that the data transmission index is updated by a polling method, and before the second communication platform updates the transmission index of the first communication platform, the method further comprises:
the second communication platform judges whether the data transmission process is error-free or not by using a local error log register;
if not, the second communication platform updates the transmission failure index of the first communication platform;
if so, the second communication platform updates the transmission received index of the first communication platform.
4. The NTB-based dual control data transmission method according to any one of claims 1 to 3, wherein after the first communication platform determines that the transmission received index is updated by a polling method, and before the first communication platform updates the transmission confirmed index of the second communication platform, the method further includes:
the first communication platform judges whether the data transmission process is error-free or not by using a local error log register;
if not, the first communication platform updates the transmission failure index of the second communication platform;
if so, the first communication platform updates the transmission confirmed index of the second communication platform.
5. An NTB-based dual-control data transmission system, comprising:
the first communication platform comprises a data transmission module, a data transmission confirmation module, an index updating judgment module, a transmission confirmation module and a completion uploading module; the data transmission module is used for transmitting data to the second communication platform by using the transmission request index; the data transmission confirming module is used for updating the data transmission index of the second communication platform after the data transmission to the second communication platform is completed; the index updating judging module is used for judging whether the index received by transmission is updated or not in a polling mode; the transmission confirmation module is used for updating the transmission confirmed index of the second communication platform when the index updating judgment module judges that the transmission received index is updated; the completion uploading module is used for sending first transmission completion information to a first upper-layer system;
the second communication platform comprises a first index judgment module, a transmission receiving module, a second index judgment module and an uploading completion module; the first index judging module is used for judging whether the index of the transmitted data is updated in a polling mode; the transmission receiving module is used for updating the transmission received index of the first communication platform when the first index judging module judges that the data transmission index is updated; the second index judging module is used for judging whether the transmission confirmed index is updated or not in a polling mode; and the completion uploading module is used for sending second transmission completion information to a second upper-layer system when the second index judgment module judges that the transmission confirmed index is updated.
6. The NTB-based dually-controlled data transmission system according to claim 5, wherein the first communication platform further comprises:
an idle marking module to generate a first transfer completed index to mark the first transfer control block as idle.
7. The NTB-based dually-controlled data transmission system according to claim 5, wherein the second communication platform further comprises:
the error judgment module is used for judging whether the data transmission process is error-free or not by utilizing a local error log register;
if not, updating the transmission failure index of the first communication platform;
if so, updating the transmission received index of the first communication platform.
8. The NTB-based dually-controlled data transmission system according to any one of claims 5 to 7, wherein the first communication platform further comprises:
the error judgment module is used for judging whether the data transmission process is error-free or not by utilizing a local error log register;
if not, updating the transmission failure index of the second communication platform;
and if so, updating the transmission confirmed index of the second communication platform.
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