CN112306939A - Bus calling method, device, equipment and storage medium - Google Patents
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- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4027—Coupling between buses using bus bridges
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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Abstract
The application discloses a bus calling method, a bus calling device, bus calling equipment and a storage medium. The method comprises the following steps: acquiring an initial priority order of each channel; counting the number of access requests of each channel; adjusting the initial priority order based on the number of the access requests to obtain a new priority order; wherein the new priority order is positively correlated with the number of requests; and controlling each channel to execute access operation on the bus according to the new priority sequence. The method dynamically adjusts the priority sequence among the channels based on the access request number of each channel, the channel with the relatively higher access request number has higher priority, and the channel with the relatively lower access request number has lower priority, so that the dynamic adjustment of the priority sequence of the calling bus among the channels according to the current request number of the channels is realized, and the overall efficiency of the calling bus by the channels can be relatively ensured. In addition, the application also provides a bus calling device, equipment and a storage medium, and the beneficial effects are as described above.
Description
Technical Field
The present application relates to the field of chip design, and in particular, to a bus calling method, apparatus, device, and storage medium.
Background
A Bus (Bus) is a common communication trunk for information transfer between various functional components in a chip, and is a transmission line bundle composed of wires, and the Bus may be divided into a plurality of channels according to the kind of information to be transmitted.
Taking an AXI bus as an example, the AXI bus refers to an AXI bus protocol, and has 5 channels, which are a read address channel, a write address channel, a read data channel, a write data channel, and a write response channel, respectively, each channel is unidirectional and is used for transmitting data of a specific type in a communication process. In the bus-based communication process, data of each channel needs to be transmitted based on a bus, a plurality of channels can simultaneously transmit access requests to the bus, and in order to ensure the stability of the access of each channel to the bus, the channels are generally controlled to call the bus according to a fixed sequence at present, so that the overall efficiency of the channel calling bus is difficult to ensure.
Therefore, it is a problem to be solved by those skilled in the art to provide a bus calling method to relatively ensure the overall efficiency of the channel calling bus.
Disclosure of Invention
The application aims to provide a bus calling method, a bus calling device, a bus calling equipment and a storage medium, so that the overall efficiency of a channel calling bus is relatively ensured.
In order to solve the above technical problem, the present application provides a bus calling method, including:
acquiring an initial priority order of each channel;
counting the number of access requests of each channel;
adjusting the initial priority order based on the number of the access requests to obtain a new priority order; wherein the new priority order is positively correlated with the number of requests;
and controlling each channel to execute access operation on the bus according to the new priority sequence.
Preferably, before adjusting the initial priority order based on the number of access requests to obtain a new priority order, the method further comprises:
judging whether the number of the access requests of the target channel in the channel reaches a preset threshold value;
and if so, executing the step of adjusting the initial priority order based on the number of the access requests to obtain a new priority order.
Preferably, before controlling the channels to perform the access operation on the bus according to the new priority order, the method further comprises:
judging whether a preset priority channel exists in each channel initiating the access request;
if so, in the new priority sequence, setting the priority of the preset priority channel to be the highest, and executing the step of controlling each channel to execute access operation on the bus according to the new priority sequence based on the modified new priority sequence.
Preferably, the channels comprise PCIE channels and the bus comprises an AXI bus.
Preferably, before counting the number of access requests of each channel, the method further comprises:
judging whether the channel initiates an access request to the bus;
and if the channel initiates an access request to the bus, performing the step of counting the number of the access requests of each channel.
Preferably, when the channel does not initiate an access request to the bus, the method further comprises:
and controlling each channel to execute access operation on the bus according to the initial priority sequence.
In addition, the present application also provides a bus calling apparatus, including:
the sequence acquisition module is used for acquiring the initial priority sequence of each channel;
the access counting module is used for counting the number of access requests of each channel;
the priority adjusting module is used for adjusting the initial priority sequence based on the number of the access requests to obtain a new priority sequence; wherein the new priority order is positively correlated with the number of requests;
and the control execution module is used for controlling each channel to execute access operation on the bus according to the new priority sequence.
Preferably, the apparatus further comprises:
and the threshold value judging module is used for judging whether the number of the access requests of the target channel in the channel reaches a preset threshold value, and if so, the priority level adjusting module is called.
In addition, the present application also provides a bus call device, including:
a memory for storing a computer program;
and the processor is used for realizing the steps of the bus calling method when executing the computer program.
In addition, the present application also provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the bus calling method as described above.
According to the bus calling method, the initial priority sequence of each channel is obtained firstly, then the number of access requests of each channel is counted, the initial priority sequence is called based on the number of the access requests, a new priority sequence is obtained, the new priority sequence is positively correlated with the number of the requests, and then each channel is controlled to execute access operation on the bus according to the new priority sequence. The method dynamically adjusts the priority sequence among the channels based on the access request number of each channel, the channel with the relatively higher access request number has higher priority, and the channel with the relatively lower access request number has lower priority, so that the dynamic adjustment of the priority sequence of the calling bus among the channels according to the current request number of the channels is realized, and the overall efficiency of the calling bus by the channels can be relatively ensured. In addition, the application also provides a bus calling device, equipment and a storage medium, and the beneficial effects are as described above.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of a bus call method disclosed in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a bus call device disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
In the bus-based communication process, data of each channel needs to be transmitted based on a bus, a plurality of channels can simultaneously transmit access requests to the bus, and in order to ensure the stability of the access of each channel to the bus, the channels are generally controlled to call the bus according to a fixed sequence at present, so that the overall efficiency of the channel calling bus is difficult to ensure.
Therefore, the core of the application is to provide a bus calling method to relatively ensure the overall efficiency of the channel calling bus.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present application discloses a bus calling method, including:
step S10: and acquiring the initial priority order of each channel.
It should be noted that the initial priority order obtained in this step refers to a priority order for controlling each channel to access the bus, and a channel with higher priority in the priority order calls the bus before a channel with lower priority. The initial priority order of each channel may be preset by a user, or obtained by statistics according to the number of access requests of each channel in a historical time or a time period, and is determined according to an actual situation, which is not specifically limited herein. In addition, the priority order of the channels may be characterized by the order between ID identifications of the channels in the priority order.
Step S11: and counting the number of access requests of each channel.
The purpose of counting the number of access requests of each channel in this step is to adjust the initial priority order according to the number of access requests in subsequent steps. The number of access requests refers to the number of requests for the channel to initiate access to the bus, and the number of access requests represents the data load of the channel.
It should be noted that the sequence of execution between this step and step S10 is not fixed, and may also be executed simultaneously, and is not limited herein.
Step S12: the initial priority order is adjusted based on the number of access requests to obtain a new priority order.
Wherein the new priority order is positively correlated to the number of requests.
After the number of access requests of each channel is obtained through statistics, the initial priority order is further adjusted based on the number of the access requests, and a new priority order is obtained. The key point of this step is that the new priority order is positively correlated with the number of requests, that is, the channels with relatively large number of access requests have higher priority in the new priority order than the channels with relatively small number of access requests, so as to ensure that the channels with high data load have access to the bus preferentially.
Step S13: and controlling each channel to execute access operation on the bus according to the new priority sequence.
And on the basis of adjusting the initial priority order based on the number of the access requests and obtaining a new priority order, the step further controls each channel to execute access operation on the bus according to the new priority order.
According to the bus calling method, the initial priority sequence of each channel is obtained firstly, then the number of access requests of each channel is counted, the initial priority sequence is called based on the number of the access requests, a new priority sequence is obtained, the new priority sequence is positively correlated with the number of the requests, and then each channel is controlled to execute access operation on the bus according to the new priority sequence. The method dynamically adjusts the priority sequence among the channels based on the access request number of each channel, the channel with the relatively higher access request number has higher priority, and the channel with the relatively lower access request number has lower priority, so that the dynamic adjustment of the priority sequence of the calling bus among the channels according to the current request number of the channels is realized, and the overall efficiency of the calling bus by the channels can be relatively ensured.
On the basis of the foregoing embodiment, as a preferred implementation manner, before adjusting the initial priority order based on the number of access requests to obtain a new priority order, the method further includes:
judging whether the number of the access requests of the target channel in the channel reaches a preset threshold value;
and if so, executing the step of adjusting the initial priority order based on the number of the access requests to obtain a new priority order.
It should be noted that, in the present embodiment, in consideration of the fact that the number of access requests of each channel may change frequently and slightly in an actual application scenario, in order to further improve the accuracy of adjusting the initial priority order, the present embodiment determines whether the number of access requests of a target channel in the channel reaches a preset threshold, and further performs a step of adjusting the initial priority order based on the number of access requests to obtain a new priority order when the number of access requests of the target channel reaches the preset threshold. The present embodiment further improves the accuracy of the new priority order.
On the basis of the foregoing embodiment, as a preferred implementation manner, before controlling the channels to perform the access operation on the bus according to the new priority order, the method further includes:
judging whether a preset priority channel exists in each channel initiating the access request;
if so, in the new priority sequence, setting the priority of the preset priority channel to be the highest, and executing the step of controlling each channel to execute access operation on the bus according to the new priority sequence based on the modified new priority sequence.
The key point of this embodiment is to determine whether there is a preset priority channel in each channel initiating an access request before controlling each channel to perform an access operation on the bus according to a new priority sequence, and when there is a preset priority channel in each channel initiating an access request, further modify the new priority sequence, and set the priority of the preset priority channel in the new priority to be the highest, that is, when controlling each channel to perform an access operation on the bus according to the new priority sequence, preferentially control the preset priority channel to perform an access operation on the bus. The preset priority channel in this embodiment may be set by the user in advance according to the priority requirement. The embodiment further ensures the overall flexibility and reliability of the bus calling process.
In addition, as a preferred embodiment, the determining whether there is a preset priority channel in each channel initiating the access request includes:
judging whether a preset priority channel with a channel signal in an effective state exists in each channel initiating the access request;
if yes, executing the step of setting the priority of the preset priority channel to be the highest in the new priority sequence, and executing the step of controlling each channel to execute access operation on the bus according to the new priority sequence based on the modified new priority sequence;
correspondingly, the method further comprises the following steps:
and caching the ID of the preset priority channel.
It should be noted that, in this embodiment, by determining whether there is a preset priority channel whose channel signal is in an active state in each channel initiating the access request, and then setting the priority of the preset priority channel to be the highest when there is a preset priority channel whose channel signal is in an active state in each channel initiating the access request, the purpose is to enable the preset priority channel to perform the access operation on the bus first. In addition, the embodiment further caches an ID (identity) of the preset priority channel, so as to accurately record the identity information of the preset priority channel.
On the basis of the above embodiment, as a preferred implementation, the channel includes a PCIE channel, and the bus includes an AXI bus.
It should be noted that PCIE (peripheral component interconnect express) is a high-speed serial computer expansion bus standard, and belongs to high-speed serial point-to-point dual-channel high-bandwidth transmission, and connected devices allocate an independent channel bandwidth and do not share a bus bandwidth, and mainly support functions such as active power management, error reporting, end-to-end reliability transmission, hot plug, and quality of service (QOS), so that the PCIE channel can relatively ensure reliability of data transmission.
Axi (advanced eXtensible interface) is a bus protocol, which is a high-performance, high-bandwidth, low-latency on-chip bus. The address/control and data phases of the device are separated, the unaligned data transmission is supported, meanwhile, in burst transmission, only the first address is needed, and meanwhile, the separated read-write data channel is easier to perform time sequence convergence. The embodiment accesses the AXI bus to perform data communication based on the PCIE channel, and can further improve the overall reliability of the access of the channel to the bus.
Further, as a preferred embodiment, the method further includes:
caching the ID of each channel and marking the ID in a channel forbidden state;
correspondingly, the obtaining of the initial priority order of each channel includes:
and acquiring the initial priority sequence among the IDs corresponding to the channels.
In the embodiment, the IDs of the channels are cached, the IDs in the channel forbidden states are marked, and the priority order among the IDs is used for representing the priority order among the channels, so that the reliability of calling the channels is further improved.
On the basis of the above series of embodiments, as a preferred implementation, before counting the number of access requests of each channel, the method further includes:
judging whether the channel initiates an access request to the bus;
and if the channel initiates an access request to the bus, performing the step of counting the number of the access requests of each channel.
It should be noted that, in the present embodiment, before counting the number of access requests of each channel, it is first determined whether a channel initiates an access request to the bus, and when there is an access request to the bus initiated by a channel, the step of counting the number of access requests of each channel is further performed. The embodiment further ensures the reliability of counting the number of the access requests of each channel, thereby ensuring the reliability of calling the bus by the subsequent control channel.
Further, as a preferred embodiment, when the channel does not initiate an access request to the bus, the method further includes:
and controlling each channel to execute access operation on the bus according to the initial priority sequence.
In addition, in this embodiment, as a result of determining whether the channel issues an access request to the bus, when the channel does not issue an access request to the bus, the channels are further controlled to perform an access operation on the bus according to the initial priority order. The embodiment relatively ensures the overall reliability of controlling each channel to execute the access operation on the bus when the channel does not initiate the access request on the bus.
Referring to fig. 2, an embodiment of the present application provides a bus call device, including:
a sequence obtaining module 10, configured to obtain an initial priority sequence of each channel;
an access counting module 11, configured to count the number of access requests of each channel;
a priority adjusting module 12, configured to adjust an initial priority order based on the number of access requests to obtain a new priority order; wherein the new priority order is positively correlated with the number of requests;
and the control execution module 13 is used for controlling each channel to execute access operation on the bus according to the new priority sequence.
Further, as a preferred embodiment, the apparatus further comprises:
and the threshold value judging module is used for judging whether the number of the access requests of the target channel in the channel reaches a preset threshold value, and if so, the priority level adjusting module is called.
The bus calling device provided by the application firstly obtains the initial priority sequence of each channel, then counts the number of access requests of each channel, calls the initial priority sequence based on the number of the access requests to obtain a new priority sequence, and controls each channel to execute access operation on the bus according to the new priority sequence, wherein the new priority sequence is positively correlated with the number of the requests. The device dynamically adjusts the priority sequence among the channels based on the access request number of each channel, the channel with the relatively higher access request number has higher priority, and the channel with the relatively lower access request number has lower priority, so that the dynamic adjustment of the priority sequence of the calling bus among the channels according to the current request number of the channels is realized, and the overall efficiency of the calling bus of the channels can be relatively ensured.
In addition, the present application also provides a bus call device, including:
a memory for storing a computer program;
and the processor is used for realizing the steps of the bus calling method when executing the computer program.
The bus calling equipment provided by the application firstly obtains the initial priority sequence of each channel, then counts the number of access requests of each channel, calls the initial priority sequence based on the number of the access requests to obtain a new priority sequence, and controls each channel to execute access operation on the bus according to the new priority sequence, wherein the new priority sequence is positively correlated with the number of the requests. The priority sequence among the channels is dynamically adjusted based on the access request number of each channel, the channel with the relatively higher access request number has higher priority, and the channel with the relatively lower access request number has lower priority, so that the dynamic adjustment of the priority sequence of the calling bus among the channels according to the current request number of the channels is realized, and the overall efficiency of the calling bus of the channels can be relatively ensured.
In addition, the present application also provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the bus calling method as described above.
The computer-readable storage medium provided by the application firstly obtains an initial priority sequence of each channel, then counts the number of access requests of each channel, calls the initial priority sequence based on the number of the access requests to obtain a new priority sequence, and then controls each channel to execute access operation on a bus according to the new priority sequence, wherein the new priority sequence is positively correlated with the number of the requests. The computer readable storage medium dynamically adjusts the priority order among the channels based on the access request number of each channel, the channel with the relatively higher access request number has higher priority, and the channel with the relatively lower access request number has lower priority, so that the dynamic adjustment of the priority order of the calling bus among the channels according to the current request number of the channels is realized, and the overall efficiency of the calling bus of the channels can be relatively ensured.
The above details describe a bus calling method, apparatus, device and storage medium provided by the present application. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are 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.
Claims (10)
1. A bus call method, comprising:
acquiring an initial priority order of each channel;
counting the number of access requests of each channel;
adjusting the initial priority order based on the number of the access requests to obtain a new priority order; wherein the new priority order is positively correlated with the number of requests;
and controlling each channel to execute access operation on the bus according to the new priority sequence.
2. The bus call method as claimed in claim 1, wherein before said adjusting said initial priority order based on said number of access requests to obtain a new priority order, said method further comprises:
judging whether the number of the access requests of the target channel in the channel reaches a preset threshold value;
and if so, executing the step of adjusting the initial priority order based on the number of the access requests to obtain a new priority order.
3. The bus call method as claimed in claim 1, wherein before said controlling each of said channels to perform access operations on said bus according to said new priority order, said method further comprises:
judging whether a preset priority channel exists in each channel initiating the access request;
if so, in the new priority sequence, setting the priority of the preset priority channel to be the highest, and executing the step of controlling each channel to execute the access operation on the bus according to the new priority sequence based on the modified new priority sequence.
4. The bus call method as recited in claim 1, wherein the channel comprises a PCIE channel and the bus comprises an AXI bus.
5. The bus call method according to any one of claims 1 to 4, wherein before said counting the number of access requests per said channel, said method further comprises:
judging whether the channel initiates an access request to a bus or not;
and if the access request is initiated to the bus by the channel, the step of counting the number of the access requests of each channel is executed.
6. The bus call method of claim 5, wherein when the channel does not initiate the access request to the bus, the method further comprises:
and controlling each channel to execute the access operation on the bus according to the initial priority order.
7. A bus call apparatus, comprising:
the sequence acquisition module is used for acquiring the initial priority sequence of each channel;
the access counting module is used for counting the number of access requests of each channel;
the priority adjusting module is used for adjusting the initial priority sequence based on the number of the access requests to obtain a new priority sequence; wherein the new priority order is positively correlated with the number of requests;
and the control execution module is used for controlling each channel to execute access operation on the bus according to the new priority sequence.
8. The bus invocation device according to claim 7, wherein the device further comprises:
and the threshold value judging module is used for judging whether the number of the access requests of the target channel in the channel reaches a preset threshold value, and if so, the priority level adjusting module is called.
9. A bus calling apparatus, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the bus call method as claimed in any one of claims 1 to 6 when executing said computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the bus call method according to any one of claims 1 to 6.
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| CN202011185011.3A CN112306939A (en) | 2020-10-29 | 2020-10-29 | Bus calling method, device, equipment and storage medium |
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| CN113094158A (en) * | 2021-03-15 | 2021-07-09 | 国政通科技有限公司 | Service drive calling method, service drive calling device, electronic equipment and storage medium |
| CN113467938A (en) * | 2021-06-18 | 2021-10-01 | 山东云海国创云计算装备产业创新中心有限公司 | Bus resource allocation method, device and related equipment |
| CN113868157A (en) * | 2021-08-20 | 2021-12-31 | 山东云海国创云计算装备产业创新中心有限公司 | Arbitration method and device for AHB system bus, AHB system bus and medium |
| CN114489541A (en) * | 2022-01-14 | 2022-05-13 | 山东云海国创云计算装备产业创新中心有限公司 | VGA video memory bandwidth regulation and control method based on FPGA and related components |
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| CN113467938B (en) * | 2021-06-18 | 2024-05-17 | 山东云海国创云计算装备产业创新中心有限公司 | Bus resource allocation method and device and related equipment |
| CN113868157A (en) * | 2021-08-20 | 2021-12-31 | 山东云海国创云计算装备产业创新中心有限公司 | Arbitration method and device for AHB system bus, AHB system bus and medium |
| CN114489541A (en) * | 2022-01-14 | 2022-05-13 | 山东云海国创云计算装备产业创新中心有限公司 | VGA video memory bandwidth regulation and control method based on FPGA and related components |
| CN114489541B (en) * | 2022-01-14 | 2024-05-10 | 山东云海国创云计算装备产业创新中心有限公司 | VGA video memory bandwidth regulation and control method based on FPGA and related components |
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