JP2013134680A - Information processing device, information processing system, and information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: an information processing device and an information processing method, which are capable of highly efficiently performing distributive arrangement of a program in accordance with required functionality; and an information processing system using the information processing device.SOLUTION: An on-vehicle information processing device 22 includes an MMU 40 for converting a memory address between a virtual address Va and a physical address Pa, the memory address at an access destination of programs 32 through 34 executed by a CPU 30, where the MMU 40 sets a degree of priority, as a criteria for distributive arrangement, on an executed page depending on whether a predetermined physical address is included in an address of a page that is one unit of the program segmented in executing the program, the address accessed by the execution of the CPU 30.

Description

  The present invention relates to an information processing apparatus and an information processing method used for executing a program in a vehicle or the like, and an information processing system using the information processing apparatus.

  As is well known, an information processing device such as a navigation system and various control devices is often mounted on a vehicle. Such an information processing device cannot avoid increasing the processing load of the program along with the increase in the functions to be provided and the improvement in performance, and the convenience of the processing speed and response speed are reduced due to the increase in processing load. It can also lead to a decline. Therefore, the program is divided into a plurality of parts, and the divided programs are distributed to a plurality of information processing apparatuses, thereby reducing the time required for program execution and reducing the processing speed and response speed of the entire information processing system. Techniques to reduce convenience and ensure convenience have also been proposed. Conventionally, as an example of such a technique, Patent Document 1 discloses a technique for performing optimization support in arranging a program for distributed processing in a plurality of information processing apparatuses.

  In the apparatus described in Patent Literature 1, it is calculated which of a plurality of information processing apparatuses (nodes) connected to the network each of a plurality of programs (applications) to be distributed processed is to be arranged. In the calculation of the program arrangement, programs having high cooperation processing priority are communicated with each other through a network excellent in communication processing based on the priority required for the cooperation processing of the program and the superiority or inferiority in communication processing of the network. The placement destination of each program is calculated so as to be placed in the information processing apparatus. According to the arrangement calculated in this way, the stability of the overall operation of the distributed application system can be improved through an appropriate cooperative operation of the programs.

JP 2009-282651 A

  By the way, in recent years, information processing apparatuses have become capable of reliable and easy rewriting of programs, and therefore, there is a tendency that rewriting of programs accompanying the improvement or correction of functions of the program is often performed. At this time, even when the arrangement of the program is calculated by the apparatus described in Patent Document 1 every time it is rewritten, the priority required for the reprogramming target program to be linked to the program is set after considering the entire program. This has to be reconfigured, and the effort is not negligible.

  Such a problem is not only an information processing apparatus mounted on a vehicle but also a common problem in various information processing apparatuses that attempt to distribute rewritable programs.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an information processing apparatus and an information processing method capable of easily and highly efficiently distributing programs according to required functions. And an information processing system using the information processing apparatus.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
In order to solve the above problem, an invention according to claim 1 is an information processing apparatus including an address conversion device that converts a memory address of an access destination of a program executed by an arithmetic device between a virtual address and a physical address. The address conversion device may determine whether the address accessed by the execution of the arithmetic unit of the page, which is a unit of the program fragmented when the program is executed, includes a predetermined physical address. The gist is to set a priority as a guide for distributed arrangement to executed pages.

  In order to solve the above problem, an invention according to claim 10 is an information processing method for performing information processing while converting a memory address of an access destination of a program executed by an arithmetic device between a virtual address and a physical address. Thus, the distributed page is distributed based on whether or not a predetermined physical address is included in the address accessed by the execution of the arithmetic unit of the page, which is a unit of the program subdivided when the program is executed The gist is to set the priority as a guideline.

  When a program is executed by an arithmetic device, it is difficult to grasp how the program is divided into pages, and therefore it is difficult to assign priorities to pages in advance when creating a program. In addition, it is not easy to accurately evaluate the operation of a program in which an instruction to be executed changes according to a condition set in the program in a static state when the program is created.

  According to such a configuration or method, since the program can be divided into pages and priorities can be given to each page in a state where the program is being executed by the arithmetic device, the program is based on dynamic operation. It becomes possible to evaluate. That is, priority based on whether or not to access a predetermined physical address can be dynamically and accurately assigned to each page. Based on these priorities, it is possible to easily and efficiently distribute programs according to the functions that are actually required.

  In addition, a high priority is set for a page accessing a predetermined physical address, and a low priority is set for other pages, so that a page accessing a predetermined physical address can be processed quickly. You can do things like that.

The invention according to claim 2 is the information processing apparatus according to claim 1, wherein the predetermined physical address is an address corresponding to an input / output interface.
The invention according to claim 11 is the information processing method according to claim 10, characterized in that the predetermined physical address is an address corresponding to an input / output interface.

  According to such a configuration or method, an appropriate priority can be given to a page that accesses an input / output interface to which a device or the like that affects user convenience is connected. Considering the convenience of the user, it is preferable that the response of the input / output interface is particularly quick. Further, based on the priority, it is possible to adjust the processing state of a page accessing such an input / output interface, for example, the time required for the processing.

  According to a third aspect of the present invention, in the information processing apparatus according to the first or second aspect, a page accessed from the page accessing the predetermined physical address is set to another page accessed from a page accessed from the predetermined physical address. The gist is that a priority different from the priority to be set is set.

  According to such a configuration, priority can be given to other pages accessed from a page accessing a predetermined physical address, and the priority given to the other page is assigned to the previous predetermined physical address. The priority assigned to the page to be accessed can be made different. That is, priority can be given to a page according to the number of other pages interposed between pages accessing a predetermined physical address, that is, a distance to a so-called predetermined physical address. As a result, it is possible to change the memory arrangement of a page accessing a predetermined physical address and other pages according to the priority.

  According to a fourth aspect of the present invention, in the information processing apparatus according to the third aspect, the page accessed to the predetermined physical address has a higher priority than the priority set to other pages accessed from the page. The gist is that the degree is set.

  According to such a configuration, a page set with a high priority can be adjusted, for example, so as to increase responsiveness. Thereby, for example, the range of adjustments related to processing using the input / output interface is expanded, and convenience is improved.

  According to a fifth aspect of the present invention, in the information processing device according to any one of the first to fourth aspects, the page is arranged in the address translation device according to the priority set for each page. An arrangement changing unit for changing the physical address is provided, and the physical address of each page is changed according to the set priority by the arrangement changing unit.

  According to such a configuration, the physical address corresponding to each page is changed according to the priority set for those pages. In other words, since the arrangement of each page can be changed according to the priority, a suitable distributed arrangement of pages can be achieved.

  According to a sixth aspect of the present invention, in the information processing apparatus according to the fifth aspect, the placement changing unit sets each page so that an access time from the arithmetic device is shortened according to the high priority. The gist is to change the physical address to be arranged.

  According to such a configuration, the arrangement of each page is adjusted so that the responsiveness of a page having a high priority is increased. Thereby, for example, the responsiveness regarding the process using the input / output interface is increased, and the convenience for the user is improved.

The gist of the invention according to claim 7 is the information processing apparatus according to any one of claims 1 to 6, wherein the information processing apparatus is mounted on a vehicle.
According to such a configuration, the arrangement of the program pages in the information processing apparatus mounted on the vehicle is determined according to the access mode to the input / output interface corresponding to the various apparatuses mounted on the vehicle. As a result, for example, the priority of a page accessing a vehicle-mounted microphone or speaker can be increased, and the page can be adjusted so as to be suitably arranged according to the priority. .

  The invention according to claim 8 is the information processing apparatus according to claim 7, wherein the vehicle is configured to be able to communicate with a server provided outside via wireless communication, The gist is to place a page with a low priority or not set at the memory address of the server.

  According to such a configuration, low priority or non-set pages are arranged on the server, so that the processing load of the program as the information processing apparatus is reduced and a predetermined physical address is set. Close pages can be placed on the vehicle to maintain the processing speed. As a result, even when an increase in the processing load of the program occurs, it is possible to deal with an increase in the processing load by suitably distributing and arranging pages.

  In order to solve the above-described problem, an information processing apparatus including an address conversion device that converts a memory address of an access destination of a program executed by an arithmetic device between a virtual address and a physical address. An information processing system provided in a vehicle and having a server capable of communicating with the vehicle via wireless communication provided outside the vehicle, wherein the address conversion device is a program that is subdivided when the program is executed. Based on whether or not a predetermined physical address is included in an address accessed by execution by the arithmetic unit of a page that is a unit, priority is set as an index of distributed arrangement on the executed page. And an arrangement change unit that changes the arrangement mode of each page according to the set priority, the arrangement change unit, Low or not set page of Sakido and gist be placed in the memory address of the server.

  According to such a configuration, since the program can be divided into pages and priority can be given to each page in a state where the program is executed by the arithmetic device, the program is evaluated based on dynamic operation. Will be able to. That is, priority based on whether or not to access a predetermined physical address can be dynamically and accurately assigned to each page. Based on these priorities, it is possible to easily and efficiently distribute programs according to the functions that are actually required.

  In addition, a high priority is set for a page accessing a predetermined physical address, and a low priority is set for other pages, so that a page accessing a predetermined physical address can be processed quickly. You can do things like that.

  Furthermore, the arrangement of the program pages in the information processing apparatus mounted on the vehicle is determined according to the access mode to the input / output interface corresponding to the various apparatuses mounted on the vehicle. As a result, for example, the priority of a page accessing a vehicle-mounted microphone or speaker can be increased, and the page can be adjusted so as to be suitably arranged according to the priority. .

  In addition, since low priority or unset pages are arranged on the server, the processing load of the program as the information processing apparatus is reduced, and pages close to a predetermined physical address are arranged on the vehicle. Thus, the processing speed can be maintained. As a result, even when an increase in the processing load of the program occurs, it is possible to deal with an increase in the processing load by suitably distributing and arranging pages.

The block diagram which shows the system configuration | structure about one Embodiment which actualized the information processing system concerning this invention. The schematic diagram which shows typically the page table provided in the information processing apparatus of the embodiment. The schematic diagram which shows typically the priority table provided in the information processing apparatus of the embodiment. 3 is a schematic diagram schematically showing address conversion performed in the information processing apparatus of the embodiment. FIG. 6 is an exemplary flowchart illustrating processing for assigning priorities to pages in the information processing apparatus of the embodiment. 6 is an exemplary flowchart illustrating an outline of processing for changing the arrangement of pages according to priority in the information processing apparatus of the embodiment. The schematic diagram which shows typically the aspect by which the arrangement | positioning of a page is defined according to a priority in the information processing apparatus of the embodiment.

Hereinafter, an embodiment of an information processing system according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the information processing system is provided with a server 10 as a fixed facility and a vehicle 20 as a moving body.

  The server 10 is provided outside the vehicle 20 and provides various information and services to the vehicle 20, and provides various information and services in response to requests from the vehicle 20. The server 10 may be, for example, a server that distributes road traffic information or a server that provides services only to specific customers. The server 10 includes a server communication device 11 that enables communication with the vehicle 20, a server information processing device 12 that performs various processes necessary for providing the various information and services described above, and a server information processing device 12. And a server storage device 13 for holding data used for various processes in the server.

  The server communication device 11 is connected to the server information processing device 12 so as to be able to perform data communication with the server information processing device 12, for example, is connected to the bus 20 and wirelessly communicates with the vehicle 20. Data communication can be carried out via each other. That is, the server communication device 11 can transmit the data input from the server information processing device 12 to the vehicle 20 and can output the data received from the vehicle 20 to the server information processing device 12.

  The server information processing apparatus 12 includes a CPU that executes various arithmetic processes, a ROM that stores various control programs, a RAM that is used as a work area for data storage and program execution, an input / output (I / O) interface, and read / write capability. The microcomputer mainly includes a nonvolatile internal storage device or the like. Various programs and various parameters for supporting driving of the vehicle 20 are stored in advance in the ROM and the internal storage device. Various driving assistances are provided to the vehicle 20 based on the execution processing of various programs including various parameters by the CPU.

  The server storage device 13 includes an HDD (Hard Disk Drive) or the like as a readable / writable nonvolatile storage device, and is connected to the server information processing device 12 so that data can be transferred to the server information processing device 12. For example, a bus connection is made. The server storage device 13 stores various information used from a program executed by the server information processing device 12. Further, the server storage device 13 may store various programs and various parameters for supporting the driving of the vehicle 20, and a part of a program to be distributed with the vehicle 20 is stored. Also good.

  Further, the server storage device 13 can be used as a virtual memory area of the in-vehicle information processing device 22. That is, a virtual memory area as a memory required for executing the program in the in-vehicle information processing apparatus 22 can be secured in the server storage device 13 and data or the like can be arranged at the memory address of the virtual memory area. It becomes like this.

  The vehicle 20 includes an in-vehicle information processing device 22 used for driving assistance and the like that is driven by a driver's driving operation. In the vehicle 20, an in-vehicle communication device 21 that enables communication with the server 10, an in-vehicle information processing device 22 that performs various processes necessary for providing the above-described driving support, and various types in the in-vehicle information processing device 22. An in-vehicle storage device 23 that holds data used for processing is provided. In addition, the vehicle 20 is provided with a microphone 24 to which the sound of a driver or the like is input, a speaker 25 that provides sound to the driver or the like, and a sensor 26 that detects the vehicle speed.

  The in-vehicle communication device 21 is connected to the in-vehicle information processing device 22 such as a bus so that data communication can be performed with the in-vehicle information processing device 22, and wireless communication with the server 10 is performed. Data communication can be carried out via each other. That is, the in-vehicle communication device 21 transmits the data input from the in-vehicle information processing device 22 to the server 10 and outputs the data received from the server 10 to the in-vehicle information processing device 22.

  The in-vehicle information processing apparatus 22 is an apparatus for performing various controls required for various driving assistance provided to a driver who drives the vehicle 20, for example, and is centered on a microcomputer including a CPU, a storage device, and the like. It is configured. In other words, the in-vehicle information processing device 22 includes a CPU 30 as an arithmetic device that executes various arithmetic processes required for the various driving support and a memory management as an address conversion device that manages memory addresses accessed from the CPU 30. A unit (MMU) 40 is provided. The in-vehicle information processing apparatus 22 includes a memory controller 50 that manages reading and writing of data with respect to memory addresses, so-called access, a non-volatile memory (ROM) 60 that stores various control programs, and data storage and program execution. A volatile memory (RAM) 61 used as a work area is provided. Further, the in-vehicle information processing apparatus 22 is provided with an input / output (I / O) interface 70 for connecting various devices to the in-vehicle information processing apparatus 22.

  Various programs and various parameters for supporting driving of the vehicle 20 are stored in the ROM 60, the in-vehicle storage device 23, and the like. Various driving assistances are provided to the vehicle 20 based on execution processing of various programs including various parameters by the CPU 30. In the in-vehicle information processing apparatus 22 of the present embodiment, for example, a program having a user interface that can be operated by sound input from the microphone 24, a program that outputs sound through the speaker 25, and the like are executed.

  The in-vehicle storage device 23 includes an HDD (Hard Disk Drive) as a readable / writable non-volatile storage device, and is connected to the in-vehicle information processing device 22 so as to be able to transfer data to the in-vehicle information processing device 22. For example, a bus connection is made. The in-vehicle storage device 23 stores various information used from a program executed by the in-vehicle information processing device 22. The in-vehicle storage device 23 may store various programs and various parameters for supporting the driving of the vehicle 20, and a part of a program to be distributed with the server 10 is stored. Also good. Furthermore, the in-vehicle storage device 23 can also be used as a virtual memory area in the in-vehicle information processing device 22. That is, a virtual memory area as a memory required for executing a program by the in-vehicle information processing apparatus 22 can be secured in the in-vehicle storage apparatus 23, and data or the like can be arranged at a memory address of the virtual memory area. It becomes like this.

  The microphone 24 is provided in the vehicle 20 in order to collect the voice of the driver or the like, and can output voice data composed of the collected voice to the CPU 30. By recognizing the sound data output in this way, the recognition result can be reflected as an operation for the program.

  The speaker 25 is a device that generates sound and sound, and outputs sound and sound corresponding to a sound signal input from the CPU 30 via the I / O interface 70. As a result, the in-vehicle information processing apparatus 22 can output information related to driving support and the like through the speaker 25 as a warning sound or a warning sound including a sound for alerting the driver.

The sensor 26 is a sensor for detecting the speed of the vehicle 20, and outputs a signal based on the speed of the vehicle 20 to the I / O interface 70.
The CPU 30 performs arithmetic processing of the OS 31 and various programs 32 to 34 and is connected to the MMU 40 and the memory controller 50 so as to allow memory access. The CPU 30 accesses, via the MMU 40 and the memory controller 50, a memory address that needs to be accessed based on the arithmetic processing of the OS 31 and various programs 32 to 34, and the data stored in the memory address through the access. To get. In the CPU 30, the OS 31 and various programs 32 to 34 are executed under a virtual address (logical address) Va as a memory address. Therefore, various instructions for accessing the memory address processed by the CPU 30. The virtual address Va included in the so-called access command is output from the CPU 30 as an access destination address.

  The MMU 40 converts the virtual address Va input from the CPU 30 into a physical address Pa as a memory address, and accesses the memory controller 50 based on the converted physical address Pa.

  The MMU 40 includes a page table 41 as a table in which the virtual address Va and the physical address Pa are associated with each other, and an address conversion unit 42 that converts the virtual address Va into the physical address Pa with reference to the page table 41. Yes. Further, when the MMU 40 converts the virtual address Va to the physical address Pa for the page for which access to the virtual address Va is requested, the MMU 40 gives priority to the page based on the converted physical address Pa. A priority setting unit 43 is provided. Furthermore, the MMU 40 is provided with a priority table 44 as a table in which pages are associated with priorities, and a memory arrangement changing unit 45 that changes the memory arrangement of pages based on the priority table 44.

  As shown in FIG. 2, the page table 41 stores a virtual address Va and a physical address Pa corresponding to the virtual address Va in association with each other. In the page table 41, for example, the virtual address “V1” is associated with the physical address “P1”, the virtual address “V2” is associated with the physical address “P2”, and the virtual address “V3” is associated with the physical address “P3”. Yes. In the page table 41, for example, the virtual address “V4” is associated with the physical address “P4”, the virtual address “V5” is associated with the physical address “P5”, and the virtual address “V6” is associated with the physical address “P6”. It has been. Furthermore, in the page table 41, for example, the virtual address “V11” is associated with the physical address “P11”, and the virtual address “V41” is associated with the physical address “P12”.

  The virtual address “V1” is configured as an address (for example, “0012340567”) in which “page number” (for example, “001234”) and “offset” (for example, “0567”) are combined. Further, the physical address “P1” includes “translation address” (for example, “004321”) and “offset” (for example, stored in the position of the page table 41 identified from “page number” included in the virtual address “V1”. For example, “0567”) is combined as an address (for example, “0043210567”). The method for converting the virtual address Va into the physical address Pa is not limited to the above example, and other known methods can be employed.

  The address conversion unit 42 refers to the page table 41 to convert the virtual address Va received from the CPU 30 into the corresponding physical address Pa and accesses the memory controller 50 based on the physical address Pa.

  The priority setting unit 43 is converted into the physical address Pa based on whether or not the physical address Pa converted by the address conversion unit 42 is included in the I / O address 51 as a predetermined physical address. A priority is set for a page having the virtual address Va as an access destination. The priority setting unit 43 also registers the priority set for the page in the priority table 44 in association with the page. For example, when the I / O address 51 is included in the physical address Pa accessed by the page, the priority setting unit 43 sets “0”, which is the highest priority, to the page. Further, for example, the priority setting unit 43 is a page called from a page including the I / O address 51 in the physical address Pa, that is, a page called from a page set with the priority “0”. In some cases, “1”, which is a medium priority, is set as the priority of the called page. Furthermore, for example, when the priority setting unit 43 is a page that does not include the I / O address 51 in the physical address Pa and is not called from a page that includes the I / O address 51 in the physical address Pa, the priority setting unit 43 As the priority, “2” which is the lowest priority is set. In this embodiment, when the program is read, the priority setting unit 43 sets the priority of all pages to “2”, which is the lowest priority, so that the priority setting unit 43 sets a new priority to be set for the page. If the degree is higher than the already set priority, the already set priority is replaced with a new priority. On the other hand, when the new priority to be set for the page is lower than the already set priority, the priority setting unit 43 does not replace the already set priority with the new priority.

  In the priority table 44, a page and a priority corresponding to the page are set. In the priority table 44, for example, the priority “0” is assigned to the page “# 1”, the priority “2” is assigned to the page “# 2”, and the priority “1” is assigned to the page “# 3”. The page “# 4” is associated with the priority “0”, the page “# 5” is associated with the priority “2”, and the page “# 6” is associated with the priority “2”. .

  The memory arrangement changing unit 45 has a function of changing the memory arrangement of each page according to the priority set for the page with reference to the priority table 44, and a “memory rearrangement instruction” from the CPU 30. Based on the above, each page is rearranged in a memory arrangement corresponding to the priority. The memory placement changing unit 45 is set with a placement destination memory associated with the priority. For example, the memory of the RAM 61 is the placement destination of the page with the priority “0”. Further, in the memory arrangement changing unit 45, the virtual memory of the in-vehicle storage device 23 is assigned to the page with the priority “1”, and the virtual memory of the server storage device 13 is assigned to the page with the priority “2”. Has been.

  The memory controller 50 manages a physical address Pa associated with an address of a memory provided in the connected ROM 60, RAM 61, and I / O interface 70. Further, the memory controller 50 acquires the data Da stored in the physical address Pa requested for access from the physical address Pa, and outputs it to the CPU 30. As a result, the CPU 30 can obtain the data Da requested for access from the physical address Pa corresponding to the virtual address Va by accessing the virtual address Va.

  In the memory controller 50, an I / O address 51 and an internal address 52 are managed as physical addresses. Since the I / O address 51 is a physical address associated with the internal memory of the I / O interface 70, access to the I / O address 51 is communicated with each device connected to the I / O interface 70. It is possible to exchange data between. Since the internal address 52 is a physical address associated with the memory of the ROM 60 or the RAM 61, access to the internal address 52 is exchanged with the memory of the ROM 60 or the RAM 61 associated with the internal address 52. Make it possible.

  The I / O interface 70 is connected to the in-vehicle communication device 21 and the in-vehicle storage device 23 via a communication bus, to the microphone 24 and the sensor 26 via an input terminal, and to the speaker 25 via an output terminal. It is connected. The I / O interface 70 converts electrical signals input from the microphone 24 and the sensor 26 into data accessible from the memory controller 50, and converts data received from the memory controller 50 into electrical signals input to the speaker 25. And provided to the speaker 25.

Next, address conversion will be described with reference to FIG.
In the CPU 30, for example, the program 32 is executed, and the executed program 32 is divided into first to sixth pages “# 1” to “# 6” and managed. That is, the CPU 30 manages the execution of the program 32 in units of pages. The CPU 30 executes the program by sequentially executing a plurality of pages divided in accordance with the execution order defined in the program. Note that a page is a part of a program that can be executed by the CPU 30, and a program obtained by subdividing the executable program with a predetermined data size is defined as one unit. The predetermined data size into which the program is divided, that is, the page size is, for example, 4 kilobytes.

  In the CPU 30, the first page “# 1” is set to the virtual address “V1”, the second page “# 2” is set to the virtual address “V2”, and the third page “# 3” is the virtual address. “V3” is set. In the CPU 30, the fourth page “# 4” is set to the virtual address “V4”, the fifth page “# 5” is set to the virtual address “V5”, and the sixth page “# 6” is set. The virtual address “V6” is set. Further, the first page “# 1” includes an access command to the virtual address “V11” corresponding to the input from the microphone 24, and the fourth page “# 4” includes the speaker 25. The access instruction to the virtual address “V41” corresponding to the output to is included.

  For example, physical addresses corresponding to the first to sixth pages “# 1” to “# 6” of the program 32 executed by the CPU 30 are managed in the memory controller 50. Specifically, in the memory controller 50, the area corresponding to the first page “# 1” is set to the physical address “P1”, and the area corresponding to the second page “# 2” is set to the physical address “P2”. The area corresponding to the third page “# 3” is set to the physical address “P3”. In the memory controller 50, the area corresponding to the fourth page “# 4” is set to the physical address “P4”, and the area corresponding to the fifth page “# 5” is set to the physical address “P5”. The area corresponding to the sixth page “# 6” is set to the physical address “P6”. Further, in the memory controller 50, a physical address “P11” is set as an address corresponding to an input from the microphone 24, and a physical address “P12” is set as an address corresponding to an output to the speaker 25. In the memory controller 50, the physical addresses “P 1” to “P 6” are assigned to memory addresses secured in the memory of the RAM 61 in the internal address 52.

  In the MMU 40, the virtual address Va received from the CPU 30 is converted into a physical address Pa managed by the memory controller 50. For example, in the MMU 40, the virtual address “V1” is converted into the physical address “P1” by the address conversion T1 performed by the address conversion unit 42 by referring to the page table 41 shown in FIG. “V2” is converted into a physical address “P2”. The virtual address “V3” is converted into the physical address “P3” by the address conversion T3 performed by the address conversion unit 42, and the virtual address “V4” is converted into the physical address “P4” by the address conversion T4. Further, the virtual address “V5” is converted into the physical address “P5” by the address conversion T5 performed by the address conversion unit 42, and the virtual address “V6” is converted into the physical address “P6” by the address conversion T6. Also, the virtual address “V11” is converted into the physical address “P11” by the address conversion T11 performed by the address conversion unit 42, and the virtual address “V41” is converted into the physical address “P12” by the address conversion T12.

  That is, the CPU 30 can access the physical address “P1” based on the virtual address “V1”, can access the physical address “P2” based on the virtual address “V2”, and can access the physical address “V3”. Based on this, the physical address “P3” can be accessed. Further, the CPU 30 can access the physical address “P4” based on the virtual address “V4”, can access the physical address “P5” based on the virtual address “V5”, and can access the physical address “V6”. Based on this, the physical address “P6” can be accessed. Further, the CPU 30 can access the physical address “P11” based on the virtual address “V11”, and can access the physical address “P12” based on the virtual address “V41”.

Next, giving priority to pages will be described with reference to FIG.
In the in-vehicle information processing apparatus 22, when the execution of the program is started, the address conversion by the MMU 40 is executed every time the CPU 30 accesses the memory.

  When the execution of the program is started, the CPU 30 processes an access command to a memory address or the like along with the processing of the program (step S10). For example, it is assumed that the access command accesses the virtual address “V1”.

  When access to the virtual address “V1” is started, the virtual address “V1” is converted by the MMU 40. That is, the MMU 40 that has received the virtual address “V1” searches the page table 41 based on the virtual address “V1” to search for a so-called entry (step S20). The MMU 40 saves the history of entries corresponding to the page obtained as a result of this search (step S21), and obtains the physical address “P1” corresponding to the virtual address “V1” from the entry corresponding to the page thus obtained. Obtain, that is, convert the virtual address “V1” to the physical address “P1” (step S22). Further, the MMU 40 assigns a priority to the page accessed to the virtual address “V1” according to the number of other pages interposed until the page accessed to the I / O address immediately before. For example, a priority “1” is set for pages through 0 to 2 other pages from a page for which the priority “0” is set, and a priority “0” is set for pages through three or more other pages. 2 "is set (step S23). As a result, the priority can be set according to the number of pages intervening until the page accessing the I / O address. Then, the MMU 40 returns to Step S30 to convert the next address.

  As the virtual address “V1” is converted to the physical address “P1” by the MMU 40, the CPU 30 changes the access destination of the access instruction to the physical address “P1”. The instruction is read, that is, the instruction is loaded (step S11). Thus, the CPU 30 can access the physical address Pa corresponding to the virtual address Va and acquire necessary data from the physical address Pa. Subsequently, the CPU 30 determines whether or not the loaded instruction is a data access instruction (step S12). If the loaded instruction is not a data access instruction (NO in step S12), CPU 30 returns to step S10 to process the next access instruction.

  On the other hand, if the loaded instruction is a data access instruction (YES in step S12), the CPU 30 processes the data access instruction (step S13). At this time, for example, it is assumed that the data access instruction accesses the virtual address “V11”.

  When access to the virtual address “V11” is started, the virtual address “V11” is address-converted by the MMU 40. That is, the MMU 40 that has received the virtual address “V11” searches the page table 41 based on the virtual address “V11”, and searches for an entry corresponding to a so-called address (step S30). The MMU 40 acquires the physical address “P11” corresponding to the virtual address “V11” from the entry obtained as a result of this search, that is, converts the virtual address “V11” into the physical address “P11” (step S31).

  As the virtual address “V11” is converted to the physical address “P11” by the MMU 40, the CPU 30 changes the access destination of the access instruction to the physical address “P11”. Data is read, that is, data is loaded (step S14). Thus, the CPU 30 can access the corresponding physical address Pa based on the virtual address Va and acquire necessary information from the physical address Pa. Then, the CPU 30 returns to step S10 to process the next access command.

  When the MMU 40 converts the virtual address “V11” to the physical address “P11” in step S31, the MMU 40 determines whether the physical address “P11” is an I / O address (step S32). When it is determined that the physical address “P11” is an I / O address (YES in step S32), the MMU 40 sets the priority of the page including this data access instruction to the priority table 44 with the highest value “ 0 "is set (step S33). Since the page containing this data access command is found to be the latest page processed in step S21 based on the page history stored in step S21, the priority table 44 is Setting a priority for a page having a data access instruction can be easily performed. Then, the MMU 40 returns to step S30 to convert the next data address. On the other hand, when it is determined that the physical address “P11” is not an I / O address (NO in step S32), the MMU 40 returns to step S30 to convert the next data address.

  By this process, as shown in FIG. 3, the priority corresponding to the page is set in the priority table 44. Specifically, the priority “0” is set for the first page “# 1” according to the address translation T1, and the priority “2” is set for the second page “# 2” according to the address translation T2. ”Is set, and the priority“ 1 ”is set for the third page“ # 3 ”in accordance with the address translation T3. Further, the priority “0” is set for the fourth page “# 4” according to the address translation T4, and the priority “2” is set for the fifth page “# 5” according to the address translation T5. Accordingly, the priority “2” is set to the sixth page “# 6” in accordance with the address translation T6.

The operation of the communication system of this embodiment will be described with reference to FIGS.
As shown in FIG. 6, when the in-vehicle information processing apparatus 22 starts executing the programs 32 to 34 such as application software, the in-vehicle information processing apparatus 22 starts monitoring the access command and the data access command (step S40) and Then, the program is operated for a certain period of time to give priority to each page (step S41). That is, each page is given priority based on the dynamic operation of the program obtained by operating the program for a certain period of time. For example, it is assumed that the priority of each page is set as in the priority table 44 shown in FIG.

  When the assignment of the priority to the page is finished, the in-vehicle information processing device 22 executes the “memory rearrangement instruction” based on a predetermined condition, so that each page is assigned according to the priority given to the page. The arrangement is changed (step S42). In the present embodiment, the placement destination of each page is the memory of the RAM 61 when the priority is “0”, the virtual memory provided in the in-vehicle storage device 23 when the priority is “1”, and the priority is “2”. ”In the virtual memory provided in the server storage device 13. According to this, the access speed from the CPU 30 is the fastest when the priority is “0”, slower than the priority “0” when the priority is “1”, and the priority is “2”. In this case, it becomes slower than priorities “0” and “1”. The predetermined condition for executing the “memory rearrangement instruction” is that the assignment of priority is completed after a lapse of a predetermined time, and that the processing capacity of the CPU 30 has a margin for performing the process of rearranging the memory. For example. Further, the traveling state of the vehicle 20 may be used as a condition.

  Then, the in-vehicle information processing apparatus 22 places the first and fourth pages “# 1” and “# 4” in the RAM 61 according to the priority table 44 as shown in FIG. The sixth page “# 2”, “# 5”, and “# 6” are arranged in the server storage device 13, and the third page “# 3” is arranged in the in-vehicle storage device 23. That is, for each page, the processing state, for example, the time required for processing, is adjusted based on the priority, including the page that accesses the I / O interface 70. Note that the placement of pages in virtual memory, access to pages placed in the virtual memory, and the like are realized based on the memory management function of the OS 31 and the like.

  Due to the rearrangement of the memory, the page accessing the I / O address 51 is arranged at a position where the access speed from the CPU 30 is fast, and the page where the access to the I / O address 51 is low is located at a position where the access speed from the CPU 30 is not fast. Will be placed. Accordingly, the microphone 24, the speaker 25, and the like accessed via the address corresponding to the I / O address 51 may reduce the time delay required for the user's operation and the provision of information to the user. become able to. In particular, if the response of the in-vehicle information processing device 22 to the information input by the user through a microphone or the like takes time, the user may be confused. It is possible to reduce the response speed for a process that keeps the response speed high and keeps the user from being confused. As described above, according to the rearrangement of the memory of the program by the in-vehicle information processing apparatus 22 of the present invention, it is possible to suppress a decrease in the reaction speed with respect to the user or the like of the apparatus while distributing the program.

  In addition, since the priority is dynamically set based on the actual operation of the program, it is possible to eliminate the trouble of setting the priority in advance in the program, Priorities are set in consideration of situations such as execution frequency that cannot be determined by evaluation. For this reason, the program can be distributed and arranged more suitably and appropriately.

As described above, according to the information processing system of this embodiment, the effects listed below can be obtained.
(1) When the programs 32 to 34 are executed by the CPU 30, it is difficult to grasp how the programs 32 to 34 are divided into pages. It is difficult. In addition, it is not easy to accurately evaluate the operation of a program in which an instruction to be executed changes according to a condition set in the program in a static state when the program is created.

  According to such a configuration, since the program 32 is divided into pages and priority can be given to each page while being executed by the CPU 30, the program 32 is evaluated based on dynamic operation. Will be able to. That is, the priority based on whether or not to access a predetermined physical address Pa (I / O address 51) can be dynamically and accurately assigned to each page. Based on such priorities, the distributed arrangement of the program 32 can be easily and highly efficiently performed according to the function currently required.

  In addition, by setting a high priority to a page that accesses the I / O address 51 and setting a low priority to other pages, processing of the page that accesses the I / O address 51 is performed. You can also do things quickly.

  (2) Appropriate priorities can be assigned to pages that access the I / O interface 70 to which devices such as the microphone 24 and the speaker 25 that affect user convenience are connected. Considering the convenience of the user, it is preferable that the response of the I / O interface 70 is particularly quick. Further, based on the priority, it becomes possible to adjust the processing state of the page accessing the I / O interface 70, for example, the time required for the processing.

  (3) Priorities can be given to other pages accessed from a page accessing a predetermined physical address Pa, and the priority given to the other pages is assigned to a predetermined physical address Pa, so-called I / The priority assigned to the page accessing the O address 51 is different from the priority assigned to the page. That is, priority can be given to pages according to the number of other pages interposed between pages accessing the I / O address 51, that is, the distance to the so-called I / O address 51. As a result, it is possible to change the memory arrangement of the page accessing the I / O address 51 and other pages according to the priority.

  (4) A page with a high priority can be adjusted so that, for example, the responsiveness becomes high. Thereby, for example, the range of adjustment regarding processing using the I / O interface 70 is expanded, and convenience is improved.

  (5) The physical address corresponding to each page is changed according to the priority set for those pages. In other words, since the arrangement of each page can be changed according to the priority, a suitable distributed arrangement of pages can be achieved.

  (6) The arrangement of each page can be adjusted so that the responsiveness of a page with a high priority becomes high. Thereby, for example, responsiveness regarding processing using the I / O interface 70 is increased, and convenience for the user is improved.

  (7) The arrangement of program pages in the in-vehicle information processing device 22 mounted on the vehicle 20 is determined according to the access mode to the I / O interface 70 corresponding to the microphone 24 and the speaker 25 which are various on-vehicle devices. Be able to. As a result, it is possible to increase the priority of a page that accesses the vehicle-mounted microphone 24, the speaker 25, or the like, and to adjust the page appropriately according to the priority. Become.

  (8) Since pages with low priority or are not set are arranged on the server 10, the processing load of the program as the in-vehicle information processing apparatus 22 is reduced, and a page close to the I / O address 51 Can be arranged on the vehicle 20 to maintain the processing speed. As a result, even when an increase in the processing load of the program occurs, it is possible to deal with an increase in the processing load by suitably distributing and arranging pages.

(Other embodiments)
In addition, the said embodiment can also be implemented in the following aspects, for example.
In the above embodiment, the case where the in-vehicle storage device 23 is configured by an HDD is illustrated. However, the present invention is not limited to this, and the in-vehicle storage device may be a flash memory or a solid state drive (SSD) as long as it is a nonvolatile storage device that can store necessary information. As a result, the degree of freedom in the configuration of the information processing system can be improved.

  In the above embodiment, the case where one sensor 26 for detecting the vehicle speed is connected to the I / O interface 70 is illustrated. However, the present invention is not limited to this. If the sensor is a sensor provided in the vehicle, the sensor detects the acceleration / deceleration of the vehicle, detects the engine speed, detects the steering angle, engine, etc. Information such as a thermometer, a position detection device such as a GPS, and a hygrometer may be input.

  Further, the number of sensors connected to the I / O interface is not limited to one, and two or more sensors may be connected. As a result, the degree of freedom in the configuration of the information processing system can be improved.

  In the above embodiment, the priority “1” is set for pages through 0 to 2 other pages from the page for which the priority “0” is set, and the pages through the other three or more other pages are set. Exemplifies the case where the priority “2” is set. However, the present invention is not limited to this, and when setting the priority, the number of other pages to be interposed can be arbitrarily set. For example, the number from the page to the page accessing the I / O address may be calculated, and the calculated number may be assigned as the page priority. Thereby, priority setting, that is, page rearrangement can be performed more appropriately.

  In the above embodiment, the case where the priority is given to the page that does not access the I / O address 51, that is, does not include the data access instruction is exemplified. However, the present invention is not limited to this, and priority may not be given to a page that does not access the I / O address, that is, does not include a data access instruction. For example, the priority can be referred to by assigning the lowest priority to all pages in advance. Alternatively, for a page for which priority is not set, the page may be rearranged with the lowest priority. As a result, priority setting in such an information processing apparatus is simplified, and page rearrangement is facilitated.

  In the above embodiment, the case where there are three types of priority, “0”, “1”, and “2” is illustrated. However, the present invention is not limited to this, and there may be four or more priorities as long as corresponding placement destinations can be set for the assigned priorities. Further, when the priority is not set, it may be determined that the priority is the lowest. As a result, the degree of freedom in designing the information processing system can be improved.

  In the above embodiment, the case where the vehicle 20 is an automobile or the like driven by the driving operation of the driver is illustrated. However, the present invention is not limited to this, so long as the vehicle is a vehicle that inputs and outputs data from a device connected to the I / O interface of the information processing device, regardless of whether the driver is involved in the driving operation, for example, You may apply to the carrier vehicle etc. which drive automatically.

  -In above-mentioned embodiment, the case where the vehicle-mounted information processing apparatus 22 was an apparatus for performing various control etc. for assisting various driving operation with respect to the driver who drives the vehicle 20 was illustrated. However, the present invention is not limited to this, and the in-vehicle information processing apparatus may promptly provide information based on data obtained from the I / O address to various control apparatuses provided in the vehicle. For example, the programs 32 to 34 shown in FIG. 1 that access and use the speed obtained from the sensor 26 by accessing the corresponding I / O address 51 are promptly assumed that the use of the speed is an internal use of the program. It can also be made available for use. Thereby, the design freedom and convenience of such an information processing apparatus are improved.

  In the above embodiment, the case where each page is distributed and arranged based on the priority is illustrated. However, the present invention is not limited to this, and based on the priority assigned to each page, each page is rearranged so that the in-vehicle information processing apparatus and the server information processing apparatus can be executed in a distributed manner. You may make it carry out distributed processing with a server. According to this, the time required for the processing of the program can be shortened, and particularly the processing load of the vehicle can be reduced by the processing of the vehicle and the server.

  In the above embodiment, the case where the memory arrangement changing unit distributes each page based on the priority is illustrated. However, the present invention is not limited to this, and priority is associated with each part of the program code based on the correspondence between the page and the program code, and the program can be distributed between the vehicle and the server based on the associated priority. You may make it rebuild in a program. According to this, creation of a program that can be distributed and distributed is supported, and a program that can be distributed and processed can be created based on dynamic evaluation of the program, thereby reducing the processing time of the program in the vehicle. And the processing load can be reduced.

  DESCRIPTION OF SYMBOLS 10 ... Server, 11 ... Server communication apparatus, 12 ... Server information processing apparatus, 13 ... Server storage apparatus, 20 ... Vehicle, 21 ... In-vehicle communication apparatus, 22 ... In-vehicle information processing apparatus, 23 ... In-vehicle storage apparatus, 24 ... Microphone, 25 ... Speaker, 26 ... Sensor, 30 ... CPU, 31 ... OS, 32-34 ... Program, 40 ... Memory management unit (MMU), 41 ... Page table, 42 ... Address conversion unit, 43 ... Priority setting unit, 44 ... priority table, 45 ... memory arrangement changing unit, 50 ... memory controller, 51 ... I / O address, 52 ... internal address, 60 ... ROM (nonvolatile memory), 61 ... RAM (volatile memory), 70 ... I / O (input / output) interface.

Claims (11)

An information processing apparatus including an address conversion device that converts a memory address of an access destination of a program executed by an arithmetic device between a virtual address and a physical address,
The address conversion device is executed based on whether or not a predetermined physical address is included in an address accessed by execution by the arithmetic device of a page that is a unit of a program fragmented when the program is executed. An information processing apparatus characterized in that a priority is set for a page as a guide for distributed arrangement. The information processing apparatus according to claim 1, wherein the predetermined physical address is an address corresponding to an input / output interface. The information according to claim 1, wherein a priority different from a priority set for a page accessing the predetermined physical address is set to another page accessed from the page accessing the predetermined physical address. Processing equipment. The information processing apparatus according to claim 3, wherein a priority higher than a priority set for another page accessed from the page is set for the page accessing the predetermined physical address. The address translation device is provided with an arrangement changing unit that changes physical addresses at which the pages are arranged according to the priority set for each page,
The information processing apparatus according to any one of claims 1 to 4, wherein a physical address arranged in each page is changed according to a set priority by the arrangement changing unit. The information processing apparatus according to claim 5, wherein the arrangement changing unit changes a physical address at which each page is arranged so that an access time from the arithmetic device is shortened according to the high priority. The information processing apparatus according to any one of claims 1 to 6, wherein the information processing apparatus is mounted on a vehicle. The vehicle is configured to be able to communicate with a server provided outside via wireless communication,
The information processing apparatus according to claim 7, wherein the arrangement changing unit arranges a page having a low priority or is not set at a memory address of the server. An information processing device including an address conversion device that converts a memory address of an access destination of a program executed by the arithmetic device between a virtual address and a physical address is provided in the vehicle, and can communicate with the vehicle via wireless communication An information processing system in which a simple server is provided outside the vehicle,
The address conversion device is executed based on whether or not a predetermined physical address is included in an address accessed by execution by the arithmetic device of a page that is a unit of a program fragmented when the program is executed. A priority is set as a guideline for distributed placement on a page, and a layout changing unit that changes the layout mode of each page according to the set priority is provided.
The information processing system, wherein the arrangement changing unit arranges a page having a low priority or is not set at a memory address of the server. An information processing method for performing information processing while converting a memory address of an access destination of a program executed on an arithmetic device between a virtual address and a physical address,
A standard for distributed arrangement on the executed page based on whether or not a predetermined physical address is included in an address accessed by execution by the arithmetic unit of a page that is a unit of a program fragmented when executing the program An information processing method characterized by setting priority. The information processing method according to claim 10, wherein the predetermined physical address is an address corresponding to an input / output interface.

Images