JPH04335441A - Command immediate answer property securing system - Google Patents

Abstract

PURPOSE:To improve the immediate answer property by processing a command given from a specific user, a terminal, etc., by taking precedence over other process. CONSTITUTION:At the time of login, a command interpreter 2 refers to a user priority registration table 10 and stores fixed priority corresponding to a login user in a user priority store area 11. Subsequently, with respect to a process generated in accordance with the inputted command, a fixed priority setting means 4 refers to fixed priority of the user priority store area 11, and sets the fixed priority which becomes a schedule object of a fixed priority scheduling mechanism 7. Also, as other system, it is also possible to set the fixed priority at every terminal, to set the fixed priority to a command interpreter by a prescribed command at the time of login, and to generate a process having the fixed priority to the command interpreted by its command interpreter.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a command prompt response guarantee method in an electronic computer system.

0002

[Prior Art] In electronic computer systems that accept and process commands from a large number of users or terminals, a limited number of processors (CPUs) are used to process processes corresponding to those commands, so priorities are set. The process to be executed is selected from the queue of processes waiting to be executed.

Conventionally, in this type of electronic computer system,
Generally, a dynamic scheduling method is adopted,
By giving uniform priority to all processes and dynamically changing the priority, when the currently running process is terminated, the process with the highest priority is selected from the waiting process queue. I was trying to do that. In addition,
The priority is changed, for example, by gradually lowering the priority while the process is being executed, and gradually increasing it while the process is in a waiting state.

0004

[Problems to be Solved by the Invention] As mentioned above, in conventional computer systems, all processes are scheduled under the dynamic scheduling method, so it is necessary to shorten urgent commands and shared resources such as the CPU. Scheduling is performed using the same criteria even for sudden commands that only occupy time, and when the overall system load is high, that is, when there are many processes in the waiting state, the commands are often scheduled for waiting. The problem was that it lacked promptness.

The present invention has been proposed in view of the above points, and its purpose is to provide immediate response by processing commands given from a specific user, terminal, etc. with priority over other processes. The purpose of this invention is to provide a command prompt response guarantee method that can improve the performance of commands.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a first aspect of the present invention, in which an execution process is mainly selected by a dynamic priority scheduling mechanism. It has a user priority registration table that registers fixed priorities for each user, and a function that refers to the user priority registration table at the time of login and stores the fixed priority corresponding to the logged-in user in the user priority storage area. command interpreter and
fixed priority setting means for setting a fixed priority to be scheduled by a fixed priority scheduling mechanism for a process generated in response to an input command by referring to a fixed priority in a user priority storage area; I am trying to prepare for this.

The second invention also provides a terminal priority registration table in which fixed priorities for each terminal are registered in advance in a computer system in which an execution process is selected mainly by a dynamic priority scheduling mechanism. , a command interpreter that has the function of referring to the terminal priority registration table at the time of login and storing the fixed priority corresponding to the logged-in terminal in the terminal priority storage area, and For the process
Fixed priority setting means is provided for setting a fixed priority to be scheduled by the fixed priority scheduling mechanism by referring to the fixed priority in the terminal priority storage area.

Furthermore, in the third invention, in a computer system in which an execution process is selected mainly by a dynamic priority scheduling mechanism, a fixed priority is assigned to a command interpreter in response to a fixed priority setting command at the time of login. A fixed priority setting means for setting and starting the command interpreter, and a fixed priority scheduling mechanism that inherits the fixed priority of the command interpreter for commands interpreted by the command interpreter set with the fixed priority. A process generating means for generating a target process having a fixed priority is provided.

[0009]

[Operation] In the first invention, at the time of login, the command interpreter refers to the user priority registration table, stores the fixed priority corresponding to the logged-in user in the user priority storage area, and applies the fixed priority to the input command. For the correspondingly generated process, the fixed priority setting means refers to the fixed priority in the user priority storage area and sets a fixed priority to be scheduled by the fixed priority scheduling mechanism.

In the second invention, at the time of login, the command interpreter refers to the terminal priority registration table, stores the fixed priority corresponding to the logged-in terminal in the terminal priority storage area, and applies the fixed priority to the input command. For the correspondingly generated process, the fixed priority setting means refers to the fixed priority in the terminal priority storage area and sets a fixed priority to be scheduled by the fixed priority scheduling mechanism.

In the third invention, the fixed priority setting means sets a fixed priority to the command interpreter according to the fixed priority setting command at the time of login and starts the command interpreter, and the process generating means For a command interpreted by a command interpreter set with a fixed priority, a process with a fixed priority is generated which inherits the fixed priority of the command interpreter and is to be scheduled by a fixed priority scheduling mechanism.

0012

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first diagram corresponding to the first aspect of the present invention.
FIG. This embodiment is effective when it is desired to process commands input by a specific user (for example, an administrator) with priority.

In FIG. 1, this embodiment includes a command input means 1, a user priority registration table 10, a command interpreter 2, a user priority storage area 11 in the command interpreter 2, a process generation means 3, Fixed priority setting means 4, waiting process queue 5,
It is composed of a dynamic priority scheduling mechanism 6, a fixed priority scheduling mechanism 7, an execution process selection means 8, and a process execution means 9. Note that the functions of each part will be explained through the following operations to avoid duplication.

[0015] The operation of the above-described first embodiment will be explained in each case.

(1) Preparation If it is desired to process commands input from a specific user with priority, a high fixed priority is registered in association with the user in the user priority registration table 10.

The user priority registration table 10 has, for example, a logical configuration as shown in FIG. 2, in which user identifiers and fixed priorities are registered in association with each other.

(2) At the time of login Processing at the time of login is performed according to the flowchart shown in FIG.

That is, when the user logs in (step S1), the command interpreter 2 is started.

[0020] The activated command interpreter 2
The user who logged in is identified from the information at the time of login (step S2).

Next, the command interpreter 2 searches the user priority registration table 10 using the user identifier as a key, and obtains the corresponding fixed priority (step S3).

Next, the command interpreter 2 stores the obtained fixed priority in the user priority storage area 11 (step S4).

(3) When inputting a command When the user inputs a command from the command input means 1 after completing the login process, the command interpreter 2 interprets the command.

Next, the process generation means 3 generates a process according to the command interpreted by the command interpreter 2.

Next, the fixed priority setting means 4 refers to the user priority storage area 11 in the command interpreter 2, sets a fixed priority for the generated process, and executes it together with other processes in the system. Connect to waiting process queue 5.

On the other hand, the dynamic priority scheduling mechanism 6
schedules processes based on a dynamic scheduling method, and the fixed priority scheduling mechanism 7 schedules processes with fixed priorities.

Here, when a process with a high fixed priority corresponding to a command input by a specific user is connected to the execution waiting process queue 5, the execution process selection means 8 selects the highest priority among them. Since this process selects a process with a high fixed priority that corresponds to a command input by a specific user.

The selected process is then passed to the process execution means 9 and executed by the process execution means 9.

FIG. 9 shows changes in priority (execution priority) with respect to time changes. Processes B and C are processes scheduled by a normal dynamic scheduling method, and process A is scheduled by a specific user. A process with a high fixed priority that responds to commands entered from.

As is clear from FIG. 9, process B,
The priority of process C changes depending on the execution state and wait state, but process A is always fixed at a high priority and is always processed with priority even when the system load is high.

Next, FIG. 4 is a block diagram showing a second embodiment corresponding to the second aspect of the present invention. This embodiment is effective when it is desired to process commands input from a specific terminal (for example, an administrator terminal) with priority.

In FIG. 4, compared to the first embodiment shown in FIG. 1, this embodiment has a user priority registration table 1.
The difference is that a terminal priority registration table 12 and a terminal priority storage area 13 are provided instead of 0 and the user priority storage area 11.

[0033] The operation of the above-mentioned second embodiment will be explained in each case.

(1) Preparation If it is desired to process commands input from a specific terminal with priority, a high fixed priority is registered in association with the terminal in the terminal priority registration table 12.

[0035] Here, the terminal priority registration table 12 is as follows:
For example, it has a logical configuration as shown in FIG. 5, in which terminal identifiers and fixed priorities are registered in association with each other.

(2) At the time of login Processing at the time of login is performed according to the flowchart shown in FIG.

That is, when the user logs in (step S5), the command interpreter 2 is activated.

[0038] The activated command interpreter 2
The terminal that logged in is identified from the information at the time of login (step S6).

Next, the command interpreter 2 uses the terminal identifier as a key to register the terminal priority registration table 12.
and obtain the corresponding fixed priority (step S
7).

Next, the command interpreter 2 stores the obtained fixed priority in the terminal priority storage area 13 (step S8).

(3) When inputting a command After the login process is completed, when the user inputs a command from the command input means 1 using a predetermined terminal, the command interpreter 2 interprets the command.

Next, the process generation means 3 generates a process according to the command interpreted by the command interpreter 2.

Next, the fixed priority setting means 4 refers to the terminal priority storage area 13 in the command interpreter 2 and sets a fixed priority for the generated process,
It is connected to the waiting process queue 5 along with other processes in the system.

On the other hand, the dynamic priority scheduling mechanism 6
schedules processes based on a dynamic scheduling method, and the fixed priority scheduling mechanism 7 schedules processes with fixed priorities.

Here, when a process with a high fixed priority corresponding to a command input from a specific terminal is connected to the execution waiting process queue 5, the execution process selection means 8 selects the highest priority among them. Therefore, a process with a high fixed priority corresponding to a command input from a specific terminal is selected.

The selected process is then passed to the process execution means 9 and executed by the process execution means 9.

Changes in priority over time are similar to those shown in FIG. 9 described above.

FIG. 7 shows a third embodiment corresponding to the third aspect of the present invention.
FIG. Since this embodiment does not require table registration in advance, it is effective when it is desired to suddenly process a specific command with priority.

In FIG. 7, compared to the first embodiment shown in FIG. 1, this embodiment has a user priority registration table 1.
0, user priority storage area 11, and fixed priority setting means 4
The difference is that there is no fixed priority setting means 14 and that a fixed priority setting means 14 is newly added.

[0050] The operation of the above-described first embodiment will be explained in each case.

(1) At the time of login Processing at the time of login is performed according to the flowchart shown in FIG.

That is, when the user logs in (step S9) and then inputs a fixed priority setting command, the fixed priority setting means 14 sets a high fixed priority to the command interpreter 2, and The command interpreter 2 is activated (step S10).

(2) When inputting a command When the user inputs a command from the command input means 1 after completing the processing at the time of login, the command interpreter 2, which already has a high fixed priority, interprets the command.

Next, the process generation means 3 generates a process that inherits the fixed priority of the command interpreter 2 for the command interpreted by the command interpreter 2 set with a fixed priority, and processes other processes in the system. It is also connected to the process queue 5 waiting for execution.

On the other hand, the dynamic priority scheduling mechanism 6
schedules processes based on a dynamic scheduling method, and the fixed priority scheduling mechanism 7 schedules processes with fixed priorities.

Here, when a process with a high fixed priority is connected to the waiting process queue 5, the execution process selection means 8 selects the process with the highest priority from among them. A process with a high fixed priority corresponding to the command interpreted by the command interpreter 2 with the set priority will be selected.

The selected process is then passed to the process execution means 9 and executed by the process execution means 9.

Changes in priority over time are similar to those shown in FIG. 9 described above.

[0059]

[Effects of the Invention] As explained above, in the command prompt response guarantee method of the present invention, the priority of a process corresponding to a command input from a specific user or terminal can be determined using other dynamic scheduling mechanisms. Since it can be set to a higher value than any of the scheduled processes, urgent or sudden commands can be processed immediately even when the system is under heavy load, greatly improving the speed of response. The effect is that it can be improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a first embodiment of a command prompt response guarantee method according to the present invention.

FIG. 2 is a diagram showing an example of a logical configuration of a user priority registration table in FIG. 1;

FIG. 3 is a flowchart showing processing at the time of login in the embodiment of FIG. 1;

FIG. 4 is a configuration diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing an example of a logical configuration of a terminal priority registration table in FIG. 4;

FIG. 6 is a flowchart showing processing at the time of login in the embodiment of FIG. 4;

FIG. 7 is a configuration diagram showing a third embodiment of the present invention.

FIG. 8 is a flowchart showing processing at the time of login in the embodiment of FIG. 7;

FIG. 9 is an explanatory diagram of command prompt response guarantee in the first to third embodiments of the present invention.

[Explanation of symbols]

1...Command input means 2...Command interpreter 3...Process generation means 4...Fixed priority setting means 5...Execution waiting process queue 6...Dynamic priority scheduling mechanism 7...Fixed priority scheduling mechanism 8 ... Execution process selection means 9 ... Process execution means 10 ... User priority registration table 11 ... User priority storage area 12 ... Terminal priority registration table 13 ... Terminal priority storage area 14 ... Fixed priority setting means

Claims (3)

[Claims] Claim 1: In a computer system in which execution processes are mainly selected by a dynamic priority scheduling mechanism, there is provided a user priority registration table in which fixed priorities for each user are registered in advance, and a user priority registration table at the time of login. A command interpreter that has a function of storing a fixed priority corresponding to a logged-in user in a user priority storage area by referring to a fixed priority setting means for setting a fixed priority to be scheduled by a fixed priority scheduling mechanism with reference to the fixed priority of the fixed priority of the fixed priority scheduling mechanism. [Claim 2] In a computer system in which an execution process is mainly selected by a dynamic priority scheduling mechanism, there is provided a terminal priority registration table in which fixed priorities for each terminal are registered in advance, and a terminal priority registration table at the time of login. A command interpreter that has the function of storing the fixed priority corresponding to the logged-in terminal in the terminal priority storage area, and a terminal priority storage area for the process generated in response to the input command. a fixed priority setting means for setting a fixed priority to be scheduled by a fixed priority scheduling mechanism with reference to the fixed priority of the fixed priority of the fixed priority scheduling mechanism. [Claim 3] In a computer system in which execution processes are mainly selected by a dynamic priority scheduling mechanism, a fixed priority is set for a command interpreter in response to a fixed priority setting command at login, and the command interpreter is started. A command interpreted by a fixed priority setting means and a command interpreter having a fixed priority has a fixed priority to be scheduled by a fixed priority scheduling mechanism that inherits the fixed priority of the command interpreter. A method for guaranteeing immediate response to a command, comprising: a process generation means for generating a process.