CN115543467A - Method for accelerating starting speed of switch - Google Patents
Method for accelerating starting speed of switch Download PDFInfo
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- CN115543467A CN115543467A CN202211512721.1A CN202211512721A CN115543467A CN 115543467 A CN115543467 A CN 115543467A CN 202211512721 A CN202211512721 A CN 202211512721A CN 115543467 A CN115543467 A CN 115543467A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44505—Configuring for program initiating, e.g. using registry, configuration files
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
Abstract
The invention provides a method for accelerating the starting speed of a switch, which comprises the following steps: step S1, acquiring customer requirements, analyzing the customer requirements to obtain a function list which must be used after starting up; s2, placing the functions which need to be used after starting up in a main program, and loading a strategy when other functions are configured and used; step S3, after the configuration is finished, the loading and the starting of the bootstrap program are executed in a Read Only Memory (ROM), and the bootstrap program is moved to a Random Access Memory (RAM) from the ROM; executing a boot program in the RAM; s4, moving the main program from the FLASH to the RAM, decompressing the functions which need to be used in the main program in the RAM, and executing the functions which need to be used in the main program in the RAM; and step S5, after executing the necessary use function in the main program, calling and executing other functions according to the use state.
Description
Technical Field
The invention relates to the technical field of switches, in particular to a method for accelerating the starting speed of a switch.
Background
Ethernet switches have been developed for decades with gradually enriched and powerful functions, and with the continuous enrichment of software functions, the switch has a longer and longer time from power-on to normal operation, which is especially obvious in the field of commercial switches.
In some special fields, customers will demand the starting speed of the switch, and suppliers need to realize the quick starting of the switch on the premise of providing rich functions.
The startup process of the switch in the prior art is roughly divided into two parts:
1) And loading and starting a system boot program. After the CPU is powered on and finishes its initialization, it will start to execute programs from the external executable ROM, and at this time, the efficiency of the CPU executing instructions is very low. After the program in the executable ROM performs basic initialization operation on the CPU (the memory controller must be initialized), the program in the executable ROM is moved to the memory to start execution, at this time, the efficiency of the CPU executing instructions reaches a normal level, and then the system boot program performs further initialization and preparation on the hardware environment. In pursuit of extreme boot speed, the function in the system main program in section 2 can be added to the boot program, thus saving the system main program loading time in step 2. However, this approach is not conducive to maintenance and the switch may provide limited functionality.
2) And loading and starting a main program of the system. The system bootstrap program moves the system main program from FLASH to the memory, and after the decompression operation is executed, the system main program can be started.
The two steps are the starting procedure of most switches in the prior art.
In order to increase the starting speed, an improvement can be considered from the two steps:
1) And accelerating the loading and starting of the system boot program. The significance of the system bootstrap program is to carry out necessary initialization on the hardware environment, and lay a foundation for the running of the main program of the system. Under the condition that the hardware environment is not changed, the loading and starting efficiency of the system boot program is difficult to improve.
2) And accelerating the loading and starting of the main program of the system. The main program of the system emphasizes the software functions, and the size of the main program of the system is therefore much larger than that of the bootstrap program, usually from several megabytes to several hundred megabytes. In order to shorten the execution time of the part, the compression algorithm is considered more. Increasing the compression ratio can shorten the time for reading the file from the FLASH, but the decompression time will be longer. It is generally necessary to select the appropriate compression algorithm and compression ratio so that the read time + decompression time is minimized.
Figure 1 shows the switch system startup process and the 6 steps of time subdivision.
1. The ROM executes a boot program.
2. The boot program is moved from the ROM to the RAM.
3. The boot program is executed in the RAM.
4. The main program is moved from FLASH to RAM.
5. And decompressing the main program in the RAM.
6. The main program is executed in the RAM.
FIG. 2 shows the internal structure of a conventional main program, which includes an operating system kernel and a root file system. The operating system kernel is often difficult to rethink. The root file system is critical data that must be used during the startup of the operating system kernel and cannot be omitted, but it is contemplated that the size of the data may be reduced. For convenience, developers have been accustomed to putting all the functions of the switch into the root file system, but this increases the load time and decompression time of the main program.
Disclosure of Invention
The object of the present invention is to solve at least one of the technical drawbacks mentioned.
Therefore, the present invention is directed to a method for increasing the startup speed of a switch, so as to solve the problems mentioned in the background art and overcome the disadvantages in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a method for increasing a startup speed of a switch, including the following steps:
step S1, customer requirements are obtained, and the customer requirements are analyzed to obtain a function list which must be used after starting up;
s2, placing the functions which need to be used after starting up in a main program, and loading a strategy when other functions are configured and used;
s3, after the configuration is finished, loading and starting a bootstrap program in a Read Only Memory (ROM), and moving the bootstrap program from the ROM to a Random Access Memory (RAM); executing a boot program in the RAM;
s4, moving the main program from the FLASH to the RAM, decompressing the functions which are necessary to use in the main program in the RAM, and executing the functions which are necessary to use in the main program in the RAM;
and step S5, after executing the necessary use function in the main program, calling and executing other functions according to the use state.
Preferably, in any of the above solutions, the main program includes an operating system kernel, a root file system, and an extended file system, and the functions that must be used after booting are added to the root file system, and other functions are added to the extended file system.
Preferably, in any of the above schemes, after the main program is started, the extended file system is mounted to a path of the root file system.
Compared with the prior art, the invention has the following beneficial effects: the method can customize the root file system and the extension file system according to different customer requirements, flexibly meet different customer requirements, and accelerate the starting time of the switch so as to achieve the purpose of shortening the starting time of the switch.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a conventional method for increasing the startup speed of a switch;
FIG. 2 is an internal structural view of a conventional main program;
FIG. 3 is a flow chart of a method of increasing the startup speed of a switch according to an embodiment of the invention;
FIG. 4 is a diagram illustrating an improved method for increasing the startup speed of a switch according to an embodiment of the present invention;
fig. 5 is an internal structural view of a main program after modification.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 3, the method for increasing the startup speed of the switch according to the embodiment of the present invention includes the following steps:
and S1, acquiring customer requirements, and analyzing the customer requirements to obtain a function list which must be used after starting.
Specifically, different main program contents are customized according to different customer requirements, namely, the main program is customized according to functions which must be used after the computer is started according to the customer requirements.
And S2, placing the functions which need to be used after the startup into the main program, and loading the strategy when other functions are configured and used.
In this step, only the functions that must be used after the boot process are placed in the main program, and the strategy of 'loading again when in use' is generally adopted for other functions, so that the size of the main program is effectively reduced, the moving time and the decompression time of the main program are further reduced, and the purpose of accelerating the boot speed under the premise of guaranteeing the availability of the basic functions is finally achieved. As shown in fig. 4, the time for moving and decompressing functions 4 and 5 can be mainly shortened by the method of the present invention.
Specifically, as shown in fig. 5, the main program includes an operating system kernel, a root file system, and an extended file system, and adds a function that must be used after booting to the root file system, and adds another function to the extended file system.
According to different customer requirements, only the necessary functions which are used immediately after the switch is started are added into the root file system, and other functions are added into the extended file system. In this way, the size of the main program loaded by the boot program becomes smaller, and thus the loading time and decompression time become smaller. After the main program is started, the extended file system is mounted to a certain path of the root file system.
S3, after the configuration is finished, loading and starting of the bootstrap program are executed in the ROM, and the bootstrap program is moved to the RAM from the ROM; the boot program is executed in the RAM.
And step S4, moving the main program from the FLASH to the RAM, decompressing the functions which are required to be used in the main program in the RAM, and executing the functions which are required to be used in the main program in the RAM.
And step S5, after executing the necessary use function in the main program, calling and executing other functions according to the use state.
In this step, after the main program is started, the extended file system is mounted to a certain path of the root file system.
Compared with the prior art, the invention has the following beneficial effects: the method can customize a root file system and an extension file system according to different customer requirements, flexibly meet different customer requirements and accelerate the starting time of the switch so as to achieve the purpose of shortening the starting time of the switch.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It will be understood by those skilled in the art that the present invention includes any combination of the summary and detailed description of the invention described above and those illustrated in the accompanying drawings, which is not intended to be limited to the details and which, for the sake of brevity of this description, does not describe every aspect which may be formed by such combination. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A method for accelerating the starting speed of a switch is characterized by comprising the following steps:
step S1, customer requirements are obtained, and the customer requirements are analyzed to obtain a function list which must be used after starting up;
s2, placing the functions which need to be used after starting up in a main program, and loading strategies when other functions are used;
s3, after the configuration is finished, loading and starting a bootstrap program in a Read Only Memory (ROM), and moving the bootstrap program from the ROM to a Random Access Memory (RAM); executing a boot program in the RAM;
s4, moving the main program from the FLASH to the RAM, decompressing the functions which need to be used in the main program in the RAM, and executing the functions which need to be used in the main program in the RAM;
and step S5, after executing the necessary use function in the main program, calling and executing other functions according to the use state.
2. The method for increasing the boot speed of a switch according to claim 1, wherein the main program comprises an operating system kernel, a root file system and an extended file system, the functions that must be used after booting are added to the root file system, and other functions are added to the extended file system.
3. The method of claim 2, wherein after the main program is started, the extended file system is mounted to a path of the root file system.
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| CN202211512721.1A CN115543467A (en) | 2022-11-30 | 2022-11-30 | Method for accelerating starting speed of switch |
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| CN202211512721.1A CN115543467A (en) | 2022-11-30 | 2022-11-30 | Method for accelerating starting speed of switch |
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Citations (5)
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| CN108762828A (en) * | 2018-04-24 | 2018-11-06 | 桂林长海发展有限责任公司 | A kind of DSP multi-core arrays two level startup method and apparatus |
| CN111008045A (en) * | 2019-11-14 | 2020-04-14 | 中国航空工业集团公司洛阳电光设备研究所 | Automatic loading method for off-chip flash high-capacity program |
| CN114138360A (en) * | 2021-11-12 | 2022-03-04 | 上海华元创信软件有限公司 | Multi-core programming starting method and system of DSP on Flash |
| CN115098190A (en) * | 2022-06-30 | 2022-09-23 | 苏州浪潮智能科技有限公司 | Method, device, terminal and storage medium for improving starting speed of SSD (solid State disk) system |
| CN115269025A (en) * | 2022-08-01 | 2022-11-01 | 亿咖通(湖北)技术有限公司 | Kernel quick starting method and device, electronic equipment and storage medium |
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2022
- 2022-11-30 CN CN202211512721.1A patent/CN115543467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762828A (en) * | 2018-04-24 | 2018-11-06 | 桂林长海发展有限责任公司 | A kind of DSP multi-core arrays two level startup method and apparatus |
| CN111008045A (en) * | 2019-11-14 | 2020-04-14 | 中国航空工业集团公司洛阳电光设备研究所 | Automatic loading method for off-chip flash high-capacity program |
| CN114138360A (en) * | 2021-11-12 | 2022-03-04 | 上海华元创信软件有限公司 | Multi-core programming starting method and system of DSP on Flash |
| CN115098190A (en) * | 2022-06-30 | 2022-09-23 | 苏州浪潮智能科技有限公司 | Method, device, terminal and storage medium for improving starting speed of SSD (solid State disk) system |
| CN115269025A (en) * | 2022-08-01 | 2022-11-01 | 亿咖通(湖北)技术有限公司 | Kernel quick starting method and device, electronic equipment and storage medium |
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