JP2001195264A - Compilation method and computer system - Google Patents

Abstract

(57) [Summary] An object of the present invention is to provide a method in which a server device compiles a program for a software virtual machine operating on a computer having a low processing capacity and a small amount of memory by a just-in-time method. When a software virtual machine operating on a computer executes a software virtual calculation horizontal program, the software virtual computer program is converted into a computer program using a compiler built in the software virtual computer using a just-in-time method. Compile with

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compiling method, and more particularly to a compiling method and a computer system for compiling a program for a software virtual machine operating on a computer with a low processing capacity and a small memory capacity by a just-in-time method. About.

[0002]

2. Description of the Related Art Conventionally, when a software virtual machine operating on a computer executes a software virtual machine program and satisfies arbitrary conditions, the software virtual machine program is compiled using a compiler built in the software virtual machine. It was compiled into a computer program, and the computer program was executed instead of the software virtual computer program.

In the past, when a software virtual machine performs just-in-time compilation, a compiler is built in the software virtual machine and compilation is performed on a local computer. However, when a software virtual machine is run on a computer with limited resources such as an embedded device, it is not practical to locally install and execute a just-in-time compiler because it increases the required resources.

Further, the just-in-time compiler requires a memory area necessary for the compiler itself and a work memory area for performing a compiling operation, and compiling is a complicated process, so that a corresponding CPU resource is consumed. Was.

[0005]

Conventionally, a just-in-time compiler for converting a software virtual machine program into a computer program has been mounted on a computer on which a software virtual machine is operating.
There is a problem in that a large amount of memory resources and CPU resources of the computer are consumed, which is not suitable for an embedded device in which memory resources and CPU resources are greatly restricted. On the other hand, a computer with a low processing capacity and a small amount of memory requires a large amount of memory for compiling, so that there is a problem that compiling cannot be performed in the computer itself.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. Therefore, a server device has a compiler for converting a software virtual machine program into a computer program, and the software virtual machine has a server machine. It is an object of the present invention to provide a compiling method and a computer system capable of distributing resources and loads by providing a mechanism for connecting a computer program and a software virtual computer program to each other.

[0007]

In order to achieve the above object, a compile method of the present invention provides a software virtual machine operating on a computer, which executes a software virtual machine program by a just-in-time method. Transfer the virtual machine program to the server device, compile the software virtual machine program into the computer program on the server device and transfer it to the software virtual machine of the computer,
The computer executes the computer program at high speed by executing the computer program.

According to the present invention, by performing the program conversion work on the server device, the memory resource consumption of the computer and the CPU resource consumption of the computer can be reduced.

Further, in the compiling method of the present invention, the computer program, which is a compilation result, is registered in a database so as to be able to be extracted using a key which can be uniquely specified when compiled by the server device, and is compiled once. When a request is made to compile the software virtual machine program, the computer program, which is a compile result, is immediately retrieved from the database and returned to the computer as a compile result.

According to the present invention, the result of compiling the software virtual machine program by the server device is cached in the database, thereby reducing the load on the compiling server device and promptly returning the compile result to the computer. Becomes possible.

Further, in the compiling method of the present invention, a software virtual computer program known to have a high probability of being executed by the computer is compiled into the computer program in advance and registered in the database. When a request is made to compile the software virtual machine program, the computer program, which is a compile result, is immediately retrieved from the database and returned to the computer as a compile result.

According to the present invention, a program having a high probability of being executed, such as when a service using a certain software virtual machine program is started, can be specified.
In addition, when it is expected that compilation requests to the server device will be concentrated, by compiling in advance and registering it in the database, the server device is dedicated to returning the compiled program to each computer. It is possible to prevent server down due to the load of centralized access.

[0013] In addition, the compiling method of the present invention transmits a computer architecture information by broadcast to a network to search for a server device implementing a compiler for an architecture of a computer executing the software virtual machine; When a reply is returned from the compilable server device, the computer finds and connects to a server device appropriate for its own architecture.

According to the present invention, the server device can be managed separately for each computer architecture, so that maintenance of the server device and updating of software are facilitated. Further, even when the computer executing the software virtual computer is connected to a different network, an appropriate server device can be found and used each time.

Further, the compiling method of the present invention can return a compilable only in response to a broadcast compiling request from another computer only for a software virtual machine program already compiled for the computer. And returning the program compiled for use to the computer that has issued the compilation request.

According to the present invention, the load of the server device can be reduced by the computer taking part of the function of the server device.

Further, according to the compile method of the present invention, when the server device compiles in response to a request from the software virtual machine, the server device can compile at any timing other than the architecture of the requesting computer. It is characterized in that it is compiled for a specific architecture and registered in the database.

According to the present invention, in the case of a system configuration or a service form in which a software virtual machine program executed on a computer of a certain architecture has a high probability of being executed on a computer of another architecture, a program for another architecture is used in advance. By compiling in advance, it is possible to quickly respond to a compilation request from a computer of another architecture, and it is not necessary to squeeze the resources of the server device for the compilation.

Further, according to the compiling method of the present invention, when a software virtual machine operating on a stand-alone computer is connected to a network connected to a server, the software virtual machine is connected to an appropriate server and compiled. It features play-just-in-time compilation.

According to the present invention, when a program for a software virtual machine is executed on a mobile embedded terminal such as a PDA terminal with a small resource, the program execution speed can be increased.
The user can easily perform the operation.

[0021]

Embodiments of the present invention will be described below.
This will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which a computer (for example, a portable terminal or the like) A (1) having a low processing capacity and a small memory capacity of three types of architectures
0), B (11), and C (12), and a single high-performance server device 13 constitutes a system. Each of the computers A (10), B (11), and C (12) has a software virtual computer VA, and the virtual computer VA is operated by a software virtual computer VA program.

In this embodiment, a computer A having a low processing capacity is used.
(10) The computer B (11) and the computer C (12) do not have the just-in-time compiler function locally, but the server device 13 has the computer A compiler 14, the computer B compiler 15, and the computer C compiler 16 I'm making it. Then, each computer A (10), B (11), C
In response to the request from (12), each computer program compiled by each compiler 14, 15, 16 of the server device 13 is output to the computer.

Thus, each of the computers A (10) and B (1)
1) and C (12) reduce the memory consumption, and
The compile processing is not performed locally, but is performed by the server device 13, so that consumption of CPU resources is suppressed.

Further, since the just-in-time compiler is collectively managed by the server device 13, each computer A
(10), B (11), and C (12) store and manage the compilation of the program requested to be compiled in the database 17, so that the server device 13 can perform the compilation more efficiently, and the execution status of the program Can be grasped. For example, with respect to a program compiled in response to a request from the computer A (10), it is expected that the computer B (11) and the computer C (12) will be executed in the future. It is stored in the database 13. And the software virtual machine VA that has been compiled once
When the program Pv is requested to be compiled, the computer A program Pa as the compilation result can be immediately taken out of the database 13 and returned to the computer as a compilation result.

A program for a software virtual computer VA that is known to have a high probability of being executed by the computer A
Pv is also compiled in advance in the computer A program Pa and registered in the database 17. Similarly, when a compile is requested, the computer A program Pa as a compile result is immediately extracted from the database 17 and the compile result is output. Can be returned to the computer.

FIG. 2 shows a processing procedure of the operation in the system of the present invention described above. For example, when the execution of the virtual computer VA program Pv is started in the computer A (10) (S10), the computer A (10) transmits the virtual computer VA program Pv to the server device 20 (S11).

The server device 20 is waiting to receive the virtual computer VA program Pv (S20), and upon receiving the virtual computer VA program Pv, the server computer 20 compiles the received virtual computer VA program Pv for the computer A. It is searched whether it is registered in the database 17 (S2
1) If registered, computer A
Program Pa (S22), and the computer A (1)
0) (S23). On the other hand, if it is not registered in the database 17, the program Pv for the virtual computer VA is compiled by using the compiler 14 for the computer A to generate the program Pa for the computer A (S24). And
The generated program A for computer A is stored in the database 204
(S25), and similarly transmits to the computer A (10) (S23).

The computer A (10) receives the computer A program Pa from the server device 13 (S12), and the computer A (10) executes the program Pa (S13).

FIG. 3 is a block diagram showing a second embodiment of the present invention, and shows a configuration in which a plurality of computers and a plurality of server devices are connected on the same network.

In the second embodiment, the network 1
Computers A (10), B (11), and C (12) are connected to the server 00, and a server Sa (20) having a compiler A for computer A and a server Sb (30) having a compiler 31 for computer B. , Compiler C for Computer C 41
And a server device Se (50) having a database 51 are connected to the network 100, respectively.

Each of the computers A (10), B (11), C (1
2) broadcasts its architecture information to the network 100, and transmits the server devices Sa (20) and Sb.
(30) Search for a server device that implements a compiler suitable for its own architecture from Sc (40) and connect it. Each server Sa equipped with a compiler
(20), Sb (30) and Sc (40) are connected to the server device 50 having a common database 51 via the network 100, and the generated compilation is stored in the database 51. As a result, a program compiled in one architecture can be compiled in advance for another architecture to prepare for a request for compiling the same program from another architecture.

[0032]

By performing the program conversion work on the server device, the memory resource consumption of each computer and the CPU resource consumption of each computer can be reduced. Further, by caching the result of compiling the software virtual machine program by the server device into the database, the load on the compiling server device can be reduced, and the compile result can be promptly returned to the computer. Also, when a service using a certain software virtual machine program is started, a program having a high probability of being executed can be specified, and compile requests to the server device are expected to be concentrated. By compiling in advance and registering it in the database, the server device can concentrate on returning the compiled program to each computer only, and it is possible to prevent the server from going down due to the load of centralized access. Further, since the server device can be managed for each computer architecture, maintenance of the server device and updating of software are facilitated. Further, even when the computer executing the software virtual computer is connected to a different network, an appropriate server device can be found and used each time. In addition, since the computer performs a part of the function of the server device, the load on the server device can be reduced. Also, in the case of a system configuration or a service form in which a software virtual machine program executed on a computer of one architecture has a high probability of being executed on a computer of another architecture, it must be compiled in advance for another architecture. Thus, it is possible to quickly respond to a compile request from a computer of another architecture, and it is not necessary to squeeze the resources of the server device for compiling. A user can easily execute a program at high speed when executing a software virtual computer program on a mobile embedded terminal such as a PDA terminal with a small resource.

[Brief description of the drawings]

FIG. 1 shows a first example to which a compiling method according to the present invention is applied.
FIG. 1 is a block diagram showing a configuration of a computer system according to an embodiment.

FIG. 2 is a view for explaining the operation of a compiling method according to the present invention.

FIG. 3 shows a second example to which the compiling method according to the present invention is applied.
FIG. 2 is a block diagram showing the configuration of the embodiment.

[Explanation of symbols]

10, 11, 12: Computers 20, 30, 40, 50: Server device 14, 15, 16, 21, 31, 41: Compiler for computer 17, 51: Database 100: Network

Claims (9)

[Claims] When a software virtual machine running on a computer with a low processing capacity and a small amount of memory executes a software virtual machine program, the software virtual machine program is transferred to the server apparatus in a just-in-time manner. Compiling the software virtual machine program into a computer program on the server device and transferring the program to the software virtual machine of the computer, the computer executes the computer program to execute the software virtual machine program. A compilation method characterized by high-speed execution. 2. When compiled by the server device,
Registering the computer program as a compilation result in a database so that it can be extracted using a uniquely identifiable key, and when requested to compile the software virtual computer program that has been compiled once, from the database, 2. The computer program as a compilation result, which is immediately taken out and returned to the computer as a compilation result.
Compilation method described. 3. A software virtual computer program known to have a high probability of being executed by the computer is compiled into the computer program in advance and registered in the database. 3. The compiling method according to claim 2, wherein when a request to compile is issued, the computer program as a compilation result is immediately taken out of the database and returned to the computer as a compilation result. 4. Broadcasting computer architecture information to a network to search for a server device implementing a compiler for the architecture of the computer executing the software virtual machine,
2. The compiling method according to claim 1, wherein a reply is returned from the compilable server device so that the computer finds and connects to a server device suitable for its own architecture. 5. Only for a software virtual computer program already compiled for a computer, a compile request can be returned in response to a broadcast compile request from another computer, and the compile request is returned to the computer that issued the compile request. 5. The method according to claim 4, wherein
Compilation method described. 6. When the server device compiles in response to a request from the software virtual machine, the server device compiles at an arbitrary timing for a compilable architecture other than the architecture of the requesting computer. 3. The compiling method according to claim 2, wherein the compiling is performed and registered in the database. 7. A plug-and-play just-in-time compile, in which a software virtual machine running on a stand-alone computer is connected to an appropriate server and compiled when connected to a network connected to the server. 2. The compiling method according to claim 1, wherein: 8. A computer having a low processing capacity and a small memory load having a software virtual computer program, a server device having a compiler for the computer, and a database storing a result compiled by the compiler, The software virtual computer program of the computer is transferred to the computer by compiling a computer program compiled by a corresponding compiler of the server device or the computer program registered in the database, and executed. Computer system. 9. A plurality of computers having a low processing capacity and a small amount of memory having a virtual computer, a plurality of server devices having a compiler for the plurality of computers, and storing a result compiled by the compiler of the server device. A database server device having a database to be connected to and a plurality of computers, a plurality of server devices, and a network to which the database server device is connected, and a compiler of the server device corresponding to the software virtual machine program of the computer. A computer system wherein a compiled computer program or the computer program registered in the database is transferred to the computer and executed.