JP5995744B2 - Process management apparatus, process management method, and process management program - Google Patents

Description

  The present invention relates to, for example, a process management apparatus, a process management method, and a process management program for managing processes.

  Conventionally, in an information processing system in which multiple processes are executed in parallel, if the system runs out of memory, some processes are forcibly terminated according to established criteria to avoid abnormal termination of the entire system Then, there is a technique for releasing the memory (for example, Non-Patent Document 1).

For example, the order in which processes are forcibly terminated is determined based on process characteristic values and setting values.
The characteristic value of the process is a dynamic value that varies depending on the execution state of the process, such as a memory usage amount or a CPU (Central Processing Unit) usage rate.
The process setting value is a value set in advance to determine the order in which processes are forcibly terminated.

In the prior art, a process given a change right for changing a set value can change the set value, but a process not given a change right cannot change the set value.
Therefore, there is a possibility that a process to which the change right is not given may be forcibly terminated even when there is a reason for avoiding the forced termination, such as when an important process is being executed.

As another conventional technique, there is a method of confirming whether or not the system may forcibly terminate the process with respect to the operator when a memory shortage occurs. When permission is obtained from the operator, the system forcibly terminates the process that uses the most memory (for example, Patent Document 1).
In other words, every time a memory shortage occurs, the system operator must determine the process to be forcibly terminated.

JP-A-11-003308

DANIEL P.M. BOVET MARCO CESATI, “Detailed Linux Kernel Third Edition”, Ohm Co., Ltd., February 22, 2007, p. 759-760

  An object of the present invention is, for example, to allow a process that wants to avoid forced termination to temporarily change the forced termination setting value for determining the order of forced termination, thereby avoiding forced termination.

The process management apparatus of the present invention
A forced termination setting value storage unit for storing a process identifier for identifying a process for each process of a plurality of processes, and a forced termination setting value for determining an order in which the plurality of processes are forcibly terminated;
A change for storing a process identifier and a change maintaining time indicating the length of time for which the forced termination setting value is changed when the forced termination setting value is changed for each of the plurality of processes. A maintenance time storage unit;
A change request receiving unit that receives a change request for changing a forced termination setting value of the request process to a request setting value from a request process that is a process included in the plurality of processes;
Based on the change request received by the change request accepting unit, a forced termination setting value associated with a process identifier of the requesting process is selected from the forced termination setting values stored in the forced termination setting value storage unit. , A set value changing unit for changing to the required set value;
A change time measuring unit that measures a time elapsed after the forced end set value is changed to the required set value by the set value changing unit as a change time;
Whether or not the change time measured by the change time measurement unit exceeds the change maintenance time associated with the process identifier of the request process among the change maintenance times stored in the change maintenance time storage unit. A change time determination unit for determining.
When the change time determination unit determines that the change time has exceeded the change maintenance time, the set value change unit sets the forced end set value of the request process to an initial value of the forced end set value. Return to some default value.

  According to the present invention, for example, a process that is desired to avoid forced termination can temporarily change the forced termination setting value for determining the order of forced termination, thereby avoiding forced termination.

2 is a functional configuration diagram of the information processing apparatus 100 according to Embodiment 1. FIG. 6 is a diagram illustrating an example of a forced termination table 191 according to Embodiment 1. FIG. 6 is a diagram illustrating an example of a process characteristic value table 192 according to Embodiment 1. FIG. 6 is a diagram illustrating an example of a forced termination setting value table 193 according to Embodiment 1. FIG. FIG. 3 is a schematic diagram of process forcible termination processing in the first embodiment. 6 is a diagram illustrating an example of a set value parameter table 194 according to Embodiment 1. FIG. 3 is a configuration diagram of a forced termination set value management unit 200 according to Embodiment 1. FIG. 6 is a flowchart showing forced termination set value management processing in the first embodiment. 6 is a flowchart showing forced termination set value management processing in the first embodiment. 6 is a flowchart showing forced termination set value management processing in the first embodiment. 4 is a flowchart showing change time measurement processing (S200) in the first embodiment. 4 is a flowchart showing interval time measurement processing (S240) in the first embodiment. FIG. 3 is a process state transition diagram in the first embodiment. FIG. 3 is a schematic diagram of process management processing in the first embodiment. FIG. 3 is a schematic diagram of process management processing in the first embodiment. FIG. 3 is a schematic diagram of process management processing in the first embodiment. FIG. 3 is a schematic diagram of process management processing in the first embodiment. 3 is a diagram illustrating an example of hardware resources of the information processing apparatus 100 according to Embodiment 1. FIG. FIG. 10 is a diagram showing another example of the set value parameter table 194 in the first embodiment. FIG. 10 is a diagram showing another example of the set value parameter table 194 in the first embodiment. FIG. 10 is a diagram showing another example of the set value parameter table 194 in the first embodiment. FIG. 10 is a diagram showing an example of a set value parameter table 194 in the second embodiment. 10 is a flowchart showing a part of forced termination setting value management processing in the second embodiment. 10 is a functional configuration diagram of an information processing apparatus 100 according to Embodiment 3. FIG. FIG. 20 is a diagram showing an example of an end warning table 195 in the third embodiment. FIG. 10 is a configuration diagram of a forced termination warning unit 300 according to Embodiment 3. 14 is a flowchart illustrating forced termination warning processing in the third embodiment. 14 is a flowchart illustrating warning target identification processing (S320) in the third embodiment.

Embodiment 1 FIG.
A description will be given of a mode in which a process that is desired to avoid forced termination temporarily changes the forced termination setting value for determining the order of forced termination to avoid forced termination.

FIG. 1 is a functional configuration diagram of the information processing apparatus 100 according to the first embodiment.
A functional configuration of the information processing apparatus 100 according to Embodiment 1 will be described with reference to FIG.

The information processing apparatus 100 (an example of a process management apparatus) is a computer that executes a plurality of processes.
A process is a unit of a program to be executed, and a computer resource such as a memory storage area or a CPU (Central Processing Unit) usage time is allocated to the process.
The information processing apparatus 100 includes a process execution unit 110, a system characteristic value acquisition unit 120, a process forced termination unit 130, a forced termination set value management unit 200, and a device storage unit 190.

The process execution unit 110 is configured to execute a plurality of processes.
The process execution unit 110 allocates a computer resource such as a memory storage area or a CPU usage time to each of the plurality of processes, and executes the plurality of processes using the allocated computer resources.

The system characteristic value acquisition unit 120 is configured to acquire a value representing a use state of a computer resource, such as a memory usage amount or a CPU usage rate, from an OS (Operating System) or hardware.
Hereinafter, the value indicating the use state of the computer resource is referred to as “characteristic value”. The characteristic value of the information processing apparatus 100 is referred to as “system characteristic value”, and the characteristic value for each process is referred to as “process characteristic value”.
The system characteristic value acquisition unit 120 periodically acquires a system characteristic value of the information processing apparatus 100 and a process characteristic value for each process.

The process forcible termination unit 130 is configured to forcibly terminate a plurality of processes in order when an overload of a computer resource such as a memory shortage or a CPU overload occurs.
The process forced termination unit 130 calculates a forced termination order expression using the process characteristic value and the forced termination set value for each process, and the forced termination order value of each of the plurality of processes obtained by the calculation is used. Determine the order, and kill the process in the determined order.
The forced termination setting value is a value for determining the order in which processes are forcibly terminated, and is used to calculate a forced termination order value. The forced termination setting value is set for each process.
The forced termination ranking value is a value indicating the order of the order in which the process is forcibly terminated, and is calculated by calculating the forced termination ranking formula. The forced termination rank expression is an expression for calculating the forced termination rank value.

  The forced termination setting value management unit 200 is configured to manage each of the forced termination setting values of a plurality of processes.

The device storage unit 190 is configured to store data used in the information processing device 100.
For example, the device storage unit 190 stores a forced termination table 191, a process characteristic value table 192, a forced termination set value table 193, and a set value parameter table 194. The contents of each table will be described below.

FIG. 2 is a diagram illustrating an example of the forced termination table 191 according to the first embodiment.
An example of the forced termination table 191 in the first embodiment will be described with reference to FIG.

  The forced termination table 191 stores data relating to conditions for forcibly terminating the process.

For example, the forced termination table 191 associates “memory usage”, “forced termination start value”, and “forced termination stop value”.
The “memory usage” indicates the usage (for example, percentage) of the memory used by the information processing apparatus 100, and is regularly updated by the system characteristic value acquisition unit 120. The memory usage of the information processing apparatus 100 is an example of a system characteristic value.
“Forced termination start value” indicates a condition value for starting forced termination of a process.
“Forced termination stop value” indicates a condition value for stopping the forced termination of the process.

FIG. 3 is a diagram illustrating an example of the process characteristic value table 192 according to the first embodiment.
An example of the process characteristic value table 192 according to the first embodiment will be described with reference to FIG.

  The process characteristic value table 192 stores data for managing the memory usage for each process.

For example, the process characteristic value table 192 associates “process” and “memory usage”.
“Process” indicates a process identifier (for example, process name) for identifying a process.
“Memory usage” indicates the usage (eg, percentage) of the memory used by the process, and is periodically updated by the system characteristic value acquisition unit 120. The process memory usage is an example of a process characteristic value.

FIG. 4 is a diagram illustrating an example of the forced termination setting value table 193 according to the first embodiment.
An example of the forced termination set value table 193 in the first embodiment will be described with reference to FIG.

  The forced termination setting value table 193 (an example of the forced termination setting value storage unit) stores data for managing the forced termination setting value for each process.

For example, the forced termination setting value table 193 associates “process”, “forced termination setting value”, and “initial setting value”.
“Process” indicates a process identifier for identifying a process.
“Forced termination setting value” indicates the current forced termination setting value.
The “initial setting value” indicates a predefined forced end setting value, that is, an initial value of the forced end setting value. Hereinafter, the initial value of the forced termination setting value is referred to as “initial setting value”.

FIG. 5 is a schematic diagram of process forcible termination processing in the first embodiment.
The outline of the process forced termination process in the first embodiment will be described with reference to FIG.

(1) The system characteristic value acquisition unit 120 periodically acquires the memory usage of the information processing apparatus 100 from the OS or the like, and stores the acquired memory usage in the forced termination table 191.
In addition, the system characteristic value acquisition unit 120 periodically acquires the memory usage for each process from the OS or the like, and sets the acquired memory usage for each process in the process characteristic value table 192.
(2) The process forced termination unit 130 periodically refers to the forced termination table 191 to determine whether or not the memory usage of the information processing apparatus 100 is equal to or greater than the forced termination start value.
Here, it is assumed that the memory usage of the information processing apparatus 100 is equal to or greater than the forced termination start value.
(3) The process forced termination unit 130 obtains the memory usage associated with the process identifier for each process from the process characteristic value table 192.
Further, the process forced termination unit 130 acquires the forced termination setting value associated with the process identifier for each process from the forced termination setting value table 193.
(4) The process forced termination unit 130 calculates a forced termination ranking formula using the memory usage and the forced termination setting value for each process, and calculates a forced termination ranking value for each process.
For example, the forced termination order expression can be expressed as “O = M− (S × 5)” using the memory usage M, the forced termination set value S, and the forced termination order value O. However, the forced termination order expression may be an expression other than this expression.
(5) The process forced termination unit 130 determines the process forced termination order based on the forced termination rank value for each process. For example, the larger the forced termination ranking value, the higher the forced termination ranking of the process, and the smaller the forced termination ranking value, the lower the forced termination ranking of the process.
(6) The process forced termination unit 130 forcibly terminates processes one by one in the order of forced termination order.
The system characteristic value acquisition unit 120 acquires the memory usage of the information processing apparatus 100 each time the process is forcibly terminated, and sets the acquired memory usage in the forcible termination table 191.
The process forced termination unit 130 refers to the forced termination table 191 every time the process is forcibly terminated, and continues to forcibly terminate the process until the memory usage becomes equal to or less than the forced termination stop value.

FIG. 6 is a diagram illustrating an example of the set value parameter table 194 according to the first embodiment.
An example of the set value parameter table 194 in the first embodiment will be described with reference to FIG.

  The set value parameter table 194 (an example of a change maintenance time storage unit, a change prohibition time storage unit, and a change notification necessity storage unit) is data regarding conditions for changing the process forcible termination set value.

For example, the set value parameter table 194 associates “process”, “condition parameter”, and “dynamic parameter”.
“Process” indicates a process identifier for identifying a process.
The “condition parameter” is a parameter set for a condition for changing the forced termination set value, and includes “change upper limit time”, “change prohibition time”, and “change notification necessity flag”.
“Change upper limit time” indicates an upper limit of time for maintaining the state in which the forced termination set value is changed (an example of the change maintenance time). The forced termination setting value changed from the initial setting value is returned to the initial setting value when the change upper limit time has elapsed.
The “change prohibition time” indicates a time during which the change of the forced end set value is prohibited after the changed forced end set value is returned to the initial set value. The forced termination setting value returned to the initial setting value is not changed until the change prohibition time has elapsed.
The “change notification necessity flag” indicates whether or not it is necessary to notify the process that the forced termination setting value has been changed.
The “dynamic parameter” is a parameter updated with respect to a condition for changing the forced termination setting value, and includes “change time”, “interval time”, and “process state”.
The “change time” indicates the time that has elapsed after the forced end set value has been changed.
The “interval time” indicates the time that has elapsed after the changed forced end set value is returned to the initial set value.
“Process status” includes “initial setting value status” in which the forced termination setting value has not been changed, “setting value change status” in which the forced termination setting value has been changed, and forced termination setting value that has been restored to the initial setting value. One of the “interval states” in which the change of “1” is prohibited.

  Next, a method for managing the process forcible termination setting value will be described.

FIG. 7 is a configuration diagram of the forced termination set value management unit 200 according to the first embodiment.
The configuration of forced termination set value management section 200 in the first embodiment will be described with reference to FIG.

  The forced termination set value management unit 200 includes a process request reception unit 210 (an example of a change request reception unit), a set value change unit 220, a change time measurement unit 230 (an example of a change time determination unit), and an interval time measurement unit. 240 (an example of an interval time determination unit), a change notification registration unit 250, and a change notification unit 260.

The process request receiving unit 210 receives a process request from a process.
For example, the process request includes a “setting value change request” for requesting a change of the forced termination setting value, a “setting value initialization request” for requesting the forced termination setting value to be returned to the initial setting value, and a forced termination setting. There is a “change notification registration request” for requesting a change notification for notifying that a value has been changed.

The setting value changing unit 220 refers to the setting value parameter table 194 and determines whether to change the forced termination setting value.
When it is determined that the forced termination setting value is to be changed, the setting value changing unit 220 changes the forced termination setting value set in the forced termination setting value table 193.

The change time measurement unit 230 measures the time (change time) that has elapsed after the forced end set value is changed, and sets the measured time in the set value parameter table 194.
The interval time measurement unit 240 measures the time (interval time) that has elapsed after the forced end set value has been returned to the initial set value, and sets the measured time in the set value parameter table 194.
The change notification registration unit 250 sets the change notification necessity flag set in the set value parameter table 194 in response to the change notification registration request.

The change notification unit 260 refers to the change notification necessity flag set in the set value parameter table 194 when the process forced termination setting value is changed, and determines whether or not to notify the process of the change.
When it is determined that a change notification to the process is to be performed, the change notification unit 260 notifies the process that the forced termination setting value has been changed.

8, 9 and 10 are flowcharts showing the forced termination set value management processing in the first embodiment.
The forced termination set value management process in the first embodiment will be described with reference to FIGS.

The forced termination set value management unit 200 (see FIG. 7) executes a forced termination set value management process every time a process request is sent from any of a plurality of processes. Hereinafter, a process that sends a process request is referred to as a “request process”.
For example, each process sends a process request using an API (Application Program Interface).

In S110 (see FIG. 8), the process request reception unit 210 receives a process request from the request process.
There are three types of process requests: “setting value change request”, “setting value initialization request”, and “change notification registration request”.
Each type of process request includes a process identifier that identifies the process that notified the process request. The set value change request includes the forced termination set value after the change. Hereinafter, the changed forced termination setting value included in the setting value change request is referred to as a “request setting value”.
After S110, the process proceeds to S111.

In step S <b> 111, the process request receiving unit 210 determines whether the process request is a “setting value change request”, “setting value initialization request”, or “change notification registration request”.
If the type of process request is “setting value change request”, the process proceeds to S120.
If the type of process request is “setting value initialization request”, the process proceeds to S130 (see FIG. 9).
If the type of process request is “change notification registration request”, the process proceeds to S119.

In S119, the change notification registration unit 250 changes the value of the change notification necessity flag of the request process.
In other words, the change notification registration unit 250 has the same process identifier (process column as the process identifier included in the change notification registration request among the change notification necessity flags set in the setting value parameter table 194 (see FIG. 6). The change notification necessity flag associated with “reference” is changed from “unnecessary (initial value)” to “necessary”.
After S119, the forced termination set value management process ends.

In S120, the setting value changing unit 220 determines the process state of the request process.
In other words, the set value changing unit 220 sets the process status set in the set value parameter table 194 (see FIG. 6) to the same process identifier (see the process column) as the process identifier included in the set value change request. Refers to the associated process state.
Then, the set value changing unit 220 determines which of the “initial set value state”, the “set value change state”, and the “interval state” the referenced process state is.
If the process state of the requesting process is “initial setting value state”, the process proceeds to S121.
If the process state of the requesting process is “setting value change state”, the process proceeds to S121.
When the process state of the request process is “interval state”, the setting value changing unit 220 does not change the forced termination setting value of the request process, and the forced termination setting value management process ends.

In S121, the setting value changing unit 220 changes the forced termination setting value of the request process to the request setting value. The request setting value is a value included in the setting value change request.
That is, the setting value changing unit 220 selects the same process identifier (process column as the process identifier included in the setting value change request) from the forced termination setting values set in the forced termination setting value table 193 (see FIG. 4). The forced termination setting value associated with the reference) is changed to the requested setting value.
After S121, the process proceeds to S122.

In S122, the setting value changing unit 220 determines whether the process state of the request process is “initial setting value state” or “setting value change state”.
When the process state of the requesting process is “initial setting value state”, the process proceeds to S123.
When the process state of the requesting process is “setting value change state”, the process proceeds to S140 (see FIG. 10).

In S123, the set value changing unit 220 changes the process state of the request process from the “initial set value state” to the “set value change state”.
After S123, the process proceeds to S200.

In S200, the change time measurement unit 230 starts a change time measurement process (S200) described later.
After the change time measurement process (S200) is started, the process proceeds to S140 (see FIG. 10).

In S140 (see FIG. 10), the change notification unit 260 determines whether to notify the requesting process that the forced termination setting value has been changed.
That is, the change notification unit 260, among the change notification necessity flags set in the setting value parameter table 194 (see FIG. 6), the same process identifier as the process identifier included in the setting value change request (see the process column). ) Is referred to.
Then, the change notification unit 260 determines whether the value of the referred change notification necessity flag is “necessary” or “unnecessary”.
If the value of the change notification necessity flag is “necessary”, the process proceeds to S141.
When the value of the change notification necessity flag is “unnecessary”, the change notification unit 260 does not notify the request process that the forced termination setting value has been changed, and the forced termination setting value management process ends.

In S141, the change notification unit 260 sends a change notification indicating that the forced termination setting value has been changed to the requesting process.
For example, the information processing apparatus 100 registers in advance a callback function for sending a change notification to the request process, and the change notification unit 260 sends the change notification to the request process by executing the callback function.
After S141, the forced termination set value management process ends.

  Next, processing when the process request is “setting value initialization request” in S111 (see FIG. 8) will be described.

In S130 (see FIG. 9), the setting value changing unit 220 determines the process state of the request process. The determination method is the same as S120 described in FIG.
If the process state of the requesting process is “setting value change state”, the process proceeds to S131.
When the process state of the request process is “initial setting value state” or “interval state”, the setting value changing unit 220 does not change the forced termination setting value of the request process, and the forced termination setting value management process ends.

In S131, the setting value changing unit 220 changes the forced termination setting value of the request process to the initial setting value.
That is, the set value changing unit 220 has the same process identifier (see the process column) as the process identifier included in the set value initialization request among the records (rows) included in the forced termination set value table 193 (see FIG. 4). ) Refers to the record that is set. Here, the record to be referred to is called “target record”.
Then, the set value changing unit 220 changes the forced end set value set in the target record to the same value as the initial set value set in the target record.
After S131, the process proceeds to S132.

In S132, the set value changing unit 220 changes the process state of the requested process from “set value change state” to “interval state”.
After S132, the process proceeds to S240.

In S240, the interval time measurement unit 240 starts an interval time measurement process described later.
After the interval time measurement process (S240) is started, the forced end set value management process ends.

FIG. 11 is a flowchart showing change time measurement processing (S200) in the first embodiment.
The change time measurement process (S200) in the first embodiment will be described with reference to FIG.

In S210, the change time measurement unit 230 initializes the change time of the requested process.
That is, the change time measuring unit 230 sets the change time associated with the process identifier (see the process column) of the request process among the change times set in the set value parameter table 194 (see FIG. 6). 0 seconds ".
After S210, the process proceeds to S220.

In S220, the change time measurement unit 230 waits for the unit elapsed time (for example, 1 second) to elapse, and adds the unit elapsed time to the request process change time when the unit elapsed time has elapsed.
After S220, the process proceeds to S221.

In S221, the change time measurement unit 230 determines whether or not the change time of the requested process is equal to or longer than the change upper limit time of the requested process.
The change upper limit time of the request process is the change upper limit time associated with the process identifier of the request process (see the process column) among the change upper limit times set in the set value parameter table 194 (see FIG. 6). is there.
When the change time of the request process is equal to or longer than the change upper limit time of the request process (YES), the change time measurement unit 230 calls the set value change unit 220, and the process proceeds to S230.
If the change time of the request process is less than the change upper limit time of the request process (NO), the process returns to S220.

In S230, the setting value changing unit 220 changes the forced termination setting value of the request process to the initial setting value.
That is, the setting value changing unit 220 refers to a record in which the process identifier of the requesting process (see the process column) is set among the records (rows) included in the forced termination setting value table 193 (see FIG. 4). To do. Here, the record to be referred to is called “target record”.
Then, the set value changing unit 220 changes the forced end set value set in the target record to the same value as the initial set value set in the target record.
After S230, the process proceeds to S231.

In S231, the set value changing unit 220 changes the process state of the requested process from “set value change state” to “interval state”.
The process state of the request process is a process state associated with the process identifier (see the process column) of the request process among the process states set in the set value parameter table 194 (see FIG. 6).
After S231, the process proceeds to S240.

In S240, the interval time measurement unit 240 starts an interval time measurement process described later.
After the interval time measurement process (S240) is started, the change time measurement process (S200) ends.

FIG. 12 is a flowchart showing the interval time measurement process (S240) in the first embodiment.
The interval time measurement process (S240) in the first embodiment will be described with reference to FIG.

In S241, the interval time measurement unit 240 initializes the interval time of the request process.
That is, the interval time measurement unit 240 sets the interval time associated with the process identifier (see the process column) of the requesting process among the interval times set in the set value parameter table 194 (see FIG. 6). 0 seconds ".
After S241, the process proceeds to S242.

In S242, the interval time measurement unit 240 waits for the unit elapsed time (for example, 1 second) to elapse, and adds the unit elapsed time to the interval time of the request process when the unit elapsed time has elapsed.
After S242, the process proceeds to S243.

In S243, the interval time measurement unit 240 determines whether or not the interval time of the requested process is equal to or longer than the change prohibition time of the requested process.
The request process change prohibition time is the change prohibition time associated with the process identifier of the request process (see the process column) among the change prohibition times set in the setting value parameter table 194 (see FIG. 6). is there.
If the interval time of the request process is equal to or longer than the change prohibition time of the request process (YES), the interval time measurement unit 240 calls the set value change unit 220, and the process proceeds to S244.
When the interval time of the request process is less than the change prohibition time of the request process (NO), the process returns to S242.

In S244, the set value changing unit 220 changes the process state of the requested process from “interval state” to “initial set value state”.
The process state of the request process is a process state associated with the process identifier (see the process column) of the request process among the process states set in the set value parameter table 194 (see FIG. 6).
After S244, the interval time measurement process (S240) ends.

FIG. 13 is a process state transition diagram according to the first embodiment.
The relationship among the process state, the process request, and the forced termination setting value will be described with reference to FIG.

  The process state transition diagram of FIG. 13 shows the process state in a rectangle with rounded corners, the upper part in the balloon shows the process request or the passage of time, and the lower part in the balloon shows whether or not the forced termination setting value has been changed. .

(1) When a set value initialization request is generated in the initial set value state, the forced termination set value is not changed from the initial set value. Further, the process state remains in the initial set value state.
(2) When a set value change request is generated in the initial set value state, the forced end set value is changed to the requested set value, and measurement of the change time is started. The process state transitions from the initial set value state to the set value change state.

(3) When a set value initialization request is generated in the set value change state, the forced end set value is changed to the initial set value, and measurement of the interval time is started. The process state transitions from the set value change state to the interval state.
(4) When a set value change request occurs in the set value change state, the forced end set value is changed to the requested set value, and the measurement of the change time is continued. Further, the process state is not changed from the set value change state.
(5) When the change time becomes equal to or longer than the change upper limit time in the set value change state, the forced end set value is changed to the initial set value, and measurement of the interval time is started. The process state transitions from the set value change state to the interval state.

(6) When a set value initialization request is generated in the interval state, the forced end set value is not changed from the initial set value, and the measurement of the interval time is continued. In addition, the process state is not changed from the interval state.
(7) When a set value change request is generated in the interval state, the forced end set value is not changed from the initial set value, and the measurement of the interval time is continued. In addition, the process state is not changed from the interval state.
(8) When the interval time becomes equal to or longer than the change prohibition time in the interval state, the forced end set value is not changed from the initial set value. Also, the process state transitions from the interval state to the initial set value state.

14, FIG. 15, FIG. 16 and FIG. 17 are schematic diagrams of process management processing in the first embodiment.
An overview of the process management process in the first embodiment will be described with reference to FIGS.

Here, the forced termination order expression is represented by “O = M− (S × 5)” using the memory usage M, the forced termination set value S, and the forced termination order value O.
Further, it is assumed that the memory usage amounts of the processes A, B, and C set in the process characteristic value table 192 are “50”, “20”, and “10”.

In FIG. 14, the forced termination setting values of the processes A, B, and C set in the forced termination setting value table 193 are not changed from the initial setting value “0”.
At this time, the forced termination order value of process A is “50 (= 50− (0 × 5))”, and the forced termination order value of process B is “20 (= 20− (0 × 5))”. The forced termination rank value of process C is “10 (= 10− (0 × 5))”. Here, when the processes A, B, and C are arranged in descending order of the forced termination order value, “process A”, “process B”, and “process C” are obtained.
Therefore, the forced termination order is “process A”, “process B”, and “process C” in order from the top. When the memory usage set in the forced termination table 191 exceeds the forced termination start value, the process forced termination unit 130 forces the processes in the order of “process A”, “process B”, and “process C” according to the forced termination order. Terminate.

In FIG. 15, it is assumed that the processes A and B that have started important processing request the change of the forced termination setting value. The required setting value for process A is “15”, and the required setting value for process B is “5”.
The forced termination setting value management unit 200 changes the forced termination setting value of the process A to the requested setting value “15”, and changes the forced termination setting value of the process B to the requested setting value “5”.
At this time, the forced termination order value of process A is “−25 (= 50− (15 × 5)”, and the forced termination order value of process B is “−5 (= 20− (5 × 5))”. Yes, the forced termination rank value of process C is “10 (= 10− (0 × 5))”.
Therefore, the forced termination order is “process C”, “process B”, and “process A”.

In FIG. 16, the forced termination setting value management unit 200 refers to the setting value parameter table 194, and sets the process B forced termination setting value to the initial setting value “0” when the process B change upper limit time “3 seconds” elapses. Return to.
At this time, the forced termination rank value of process A is “−25 (= 50− (15 × 5)”, and the forced termination rank value of process B is “20 (= 20− (0 × 5))”. The forced termination rank value of process C is “10 (= 10− (0 × 5))”.
Therefore, the forced termination order is “process B”, “process C”, and “process A”.

In FIG. 17, the forced termination setting value management unit 200 refers to the setting value parameter table 194, and sets the process A forced termination setting value as the initial setting value “0” when the process A change upper limit time “10 seconds” elapses. Return to.
At this time, the forced termination order value of the process A is “50 (= 50− (0 × 5)”, and the forced termination order value of the process B is “20 (= 20− (0 × 5))”. The forced termination rank value of process C is “10 (= 10− (0 × 5))”.
Therefore, the forced termination order is “process A”, “process B”, and “process C”.

FIG. 18 is a diagram illustrating an example of hardware resources of the information processing apparatus 100 according to the first embodiment.
In FIG. 18, the information processing apparatus 100 (an example of a computer) includes a CPU 901. The CPU 901 is connected to hardware devices such as a ROM 903, a RAM 904, a communication board 905 (communication device), a display 911 (display device), a keyboard 912, a mouse 913, a drive 914, and a magnetic disk device 920 via a bus 902. Control hardware devices. The drive 914 is a device that reads and writes storage media such as an FD (Flexible Disk), a CD (Compact Disc), and a DVD (Digital Versatile Disc).
The ROM 903, the RAM 904, the magnetic disk device 920, and the drive 914 are examples of storage devices. A keyboard 912, a mouse 913, and a communication board 905 are examples of input devices. The display 911 and the communication board 905 are examples of output devices.

  The communication board 905 is wired or wirelessly connected to a communication network such as a LAN (Local Area Network), the Internet, or a telephone line.

  The magnetic disk device 920 stores an OS 921 (operating system), a program group 922, and a file group 923.

  The program group 922 includes programs that execute the functions described as “units” in the embodiments. A program (for example, a process management program) is read and executed by the CPU 901. That is, the program causes the computer to function as “to part”, and causes the computer to execute the procedures and methods of “to part”.

  The file group 923 includes various data (input, output, determination result, calculation result, processing result, etc.) used in “˜part” described in the embodiment.

In the embodiment, arrows included in the configuration diagrams and flowcharts mainly indicate input and output of data and signals.
The processing of the embodiment described based on the flowchart and the like is executed using hardware such as the CPU 901, a storage device, an input device, and an output device.

  In the embodiment, what is described as “to part” may be “to circuit”, “to apparatus”, and “to device”, and “to step”, “to procedure”, and “to processing”. May be. That is, what is described as “to part” may be implemented by any of firmware, software, hardware, or a combination thereof.

In the first embodiment, for example, the information processing apparatus 100 can achieve the following effects.
The information processing apparatus 100 changes the forced termination setting value according to the setting value change request from the process. As a result, a process that performs important processing can lower the forced termination order and temporarily avoid the forced termination.
The information processing apparatus 100 registers in advance a process for requesting a change notification. Then, the information processing apparatus 100 notifies the process that the forced termination setting value has been changed after changing the forced termination setting value of the process requesting the change notification. As a result, the process requesting the change notification performs an important process or a process corresponding to the requested forced termination setting value after the forced termination setting value is changed (for example, a process for displaying the modified forced termination setting value). It can be performed. In addition, it is possible to prevent change notification to a process that does not request change notification.
The information processing apparatus 100 initializes the forced termination setting value according to the setting value initialization request from the process. As a result, the process that has finished important processing can restore the forced termination setting value to the original value.
The information processing apparatus 100 returns the forced termination setting value to the initial value when the upper limit change time has elapsed since the forced termination setting value was changed. Thereby, it can be avoided that the process keeps changing the forced termination set value unnecessarily.
The information processing apparatus 100 changes the forced end setting value according to a new set value change request until the change upper limit time elapses after the forced end set value is changed, but the change time to be compared with the change upper limit time is changed. Do not initialize. That is, the information processing apparatus 100 continues to measure the change time until the change upper limit time elapses even if the forced end setting value is newly changed. As a result, it is possible to prevent the process from periodically changing the forced termination set value by making a set value change request.
The information processing apparatus 100 does not change the forced termination setting value until the change prohibition time elapses after the forced termination setting value is returned to the initial value. Thereby, it is possible to avoid the process from changing the forced termination set value continuously unnecessarily.

  In the first embodiment, the information processing apparatus 100 may be an in-vehicle device or a smartphone.

FIG. 19 is a diagram showing another example of the set value parameter table 194 in the first embodiment. The setting value parameter table 194 shown in FIG. 19 includes a condition parameter table 194C and a dynamic parameter table 194D.
The information processing apparatus 100 may group processes and store a change upper limit time, a change prohibition time, or a change notification necessity flag for each process group (see 194C in FIG. 19).
For example, when the information processing apparatus 100 is an in-vehicle device, a plurality of processes are used to execute an application that provides a “route guidance” group or entertainment information (for example, music) for executing an application that performs route guidance. It can be grouped into “entertainment” groups.

FIG. 20 is a diagram showing another example of the set value parameter table 194 in the first embodiment. The set value parameter table 194 shown in FIG. 20 includes a condition parameter table 194C-1 for the “running” state, a condition parameter table 194C-2 for the “stopped” state, and a dynamic parameter table 194D.
The information processing apparatus 100 may store the usage state in which the information processing apparatus 100 is used and the change upper limit time, change prohibition time, or change notification necessity flag for each process in association with each other (194C- in FIG. 20). 1 and 194C-2).
The information processing apparatus 100 acquires the usage state of the information processing apparatus 100, and uses the change upper limit time, the change prohibition time, or the change notification necessity flag that is associated with the acquired use state.
For example, when the vehicle equipped with the information processing apparatus 100 functioning as an in-vehicle device is in a traveling state, the information processing apparatus 100 changes the upper limit change time associated with the traveling condition parameter parameter table 194C-1. The change prohibition time or the change notification necessity flag is used. For example, the change upper limit time of the process A for the application that performs route guidance is longer than the change upper limit time of the processes B and C for the application that provides entertainment information.

FIG. 21 is a diagram showing another example of the set value parameter table 194 in the first embodiment. The setting value parameter table 194 shown in FIG. 21 includes a condition parameter table 194C-1 for importance “A”, a condition parameter table 194C-2 for importance “B”, and a dynamic parameter table 194D.
The information processing apparatus 100 may store the program importance indicating the importance of the application program in association with the change upper limit time, the change prohibition time, or the change notification necessity flag (194C-1 and 194C- in FIG. 21). 2).
The information processing apparatus 100 acquires a program importance set in advance in an application program executed by the process, and uses a change upper limit time, a change prohibition time, or a change notification necessity flag associated with the acquired program importance. To do.
For example, a user who uses a smartphone sets program importance “A” when installing an application program on the smartphone. Then, the information processing apparatus 100 functioning as a smartphone acquires the program importance “A” set in the application program from the process, and is associated with the acquired condition parameter table 194C-1 for the program importance “A”. The change upper limit time, change prohibition time, or change notification necessity flag is used.

In the first embodiment, for example, the following process management apparatus (100) has been described. The code | symbol or name of a corresponding structure is described in a parenthesis.
The process management apparatus includes a forced termination set value storage unit (193), a change maintenance time storage unit (194), a change request reception unit (210), a set value change unit (220), and a change time measurement unit ( 230) and a change time determination unit (230).
The forced termination setting value storage unit stores, for each of a plurality of processes, a process identifier for identifying a process and a forced termination setting value for determining an order in which the plurality of processes are forcibly terminated. .
The change maintaining time storage unit is a process identifier for each of the plurality of processes, and a change indicating a length of time for which the forced termination setting value is maintained when the forced termination setting value is changed The maintenance time (change upper limit time) is stored.
The change request receiving unit receives a change request for changing a forced termination setting value of the request process to a request setting value from a request process which is a process included in the plurality of processes.
The setting value changing unit is associated with a process identifier of the request process among the forced termination setting values stored in the forced termination setting value storage unit based on the change request received by the change request receiving unit. The set forced termination set value is changed to the requested set value.
The change time measuring unit measures, as a change time, a time elapsed after the forced end set value is changed to the required set value by the set value changing unit.
The change time determination unit is configured to maintain the change associated with the process identifier of the request process among the change maintenance times stored in the change maintenance time storage unit, the change time measured by the change time measurement unit. Determine if the time has been exceeded.
When the change time determination unit determines that the change time has exceeded the change maintenance time, the set value change unit sets the forced end set value of the request process to an initial value of the forced end set value. Return to some default value.

The process management apparatus includes a change prohibition time storage unit (194), an interval time measurement unit (240), and an interval time determination unit (240).
The change prohibition time storage unit includes a process identifier and a change indicating a length of time during which the change of the forced termination setting value is prohibited after the forced termination setting value is returned to the initial setting value for each of the plurality of processes. The prohibited time is stored.
The interval time measuring unit measures, as an interval time, a time that has elapsed after the set value changing unit returns the forced termination set value of the request process to the initial set value.
The interval time determination unit is a change prohibition associated with the process identifier of the request process among the change prohibition times stored in the change prohibition time storage unit, the interval time measured by the interval time measurement unit. Determine if the time has been exceeded.
The change request receiving unit receives a new change request from the request process.
The set value changing unit, when the change request receiving unit receives the new change request after the interval time determining unit determines that the interval time has exceeded the change prohibition time, the new change request The forced termination setting value of the request process is changed based on

  When the setting value changing unit changes the forced termination setting value of the request process, the process management device sends a change notification for notifying that the forced termination setting value has been changed to the requesting process. A change notification unit (260) is provided.

The process management apparatus includes a change notification necessity storage unit (194) that stores a process identifier and a change notification necessity flag value indicating whether change notification is necessary for each of the plurality of processes.
The change notification unit, when the set value change unit changes the forced termination setting value of the request process, out of the change notification necessity flag value stored in the change notification necessity storage unit of the request process Whether the change notification is necessary is determined based on a change notification necessity flag value associated with the process identifier.
The change notification unit sends the change notification to the request process when determining that the change notification is necessary.

Embodiment 2. FIG.
A mode in which an upper limit is set for the forced termination set value will be described.
Hereinafter, items different from the first embodiment will be mainly described. Matters whose description is omitted are the same as those in the first embodiment.

The configuration of the information processing apparatus 100 is the same as that of the first embodiment (see FIG. 1).
The configuration of the forced termination set value management unit 200 is the same as that of the first embodiment (see FIG. 7).

FIG. 22 is a diagram illustrating an example of the set value parameter table 194 according to the second embodiment.
An example of the set value parameter table 194 according to Embodiment 1 will be described with reference to FIG.

The set value parameter table 194 (an example of the set upper limit storage unit) includes “set upper limit value” in addition to the items described in the first embodiment (see FIG. 6).
“Setting upper limit value” indicates the upper limit value of the forced termination setting value.

FIG. 23 is a flowchart showing a part of the forced termination set value management process in the second embodiment.
The forced termination set value management process in the second embodiment will be described with reference to FIG.

  The forced termination set value management unit 200 executes S124 in addition to the processing described in the first embodiment (see FIGS. 8 to 10).

In S124, the setting value change unit 220 of the forced termination setting value management unit 200 compares the request setting value included in the setting value change request with the setting upper limit value of the request process.
That is, the setting value changing unit 220 compares the setting upper limit value associated with the process identifier of the request process among the setting upper limit values included in the setting value parameter table 194 (see FIG. 22) with the request setting value.
If the requested setting value is larger than the requested upper limit value of the requesting process, the setting value changing unit 220 does not change the forced termination setting value of the requested process, and the forced termination setting value management process ends.
If the requested setting value is less than or equal to the requested upper limit value of the requesting process, the process proceeds to S121, and in S121, the setting value changing unit 220 changes the forced termination setting value of the requested process to the requested setting value.
Other processes are the same as those in the first embodiment.

  According to the second embodiment, the information processing apparatus 100 can prevent the process forced termination setting value from being changed to a request setting value that is higher than necessary.

  Similarly to the change upper limit time, the change prohibition time, or the change notification necessity flag described with reference to FIGS. 19 to 21 of the first embodiment, the information processing apparatus 100 performs each process group, each use state of the information processing apparatus 100, or You may memorize | store a setting upper limit for every program importance.

In the second embodiment, for example, the following process management apparatus (100) has been described. The code | symbol or name of a corresponding structure is described in a parenthesis.
The process management apparatus includes a set upper limit value storage unit (194) that stores a process identifier and a set upper limit value that is an upper limit value of the forced termination set value for each of the plurality of processes.
The set value changing unit (220) compares a set upper limit value associated with a process identifier of the request process among the set upper limit values stored in the set upper limit value storage unit with the requested set value.
The setting value changing unit changes the forced termination setting value of the request process to the request setting value on condition that the request setting value is equal to or less than the setting upper limit value of the request process.

Embodiment 3 FIG.
A description will be given of a form in which the process is forcibly terminated before the process is forcibly terminated.
Hereinafter, items different from the first embodiment will be mainly described. Matters whose description is omitted are the same as those in the first embodiment.

FIG. 24 is a functional configuration diagram of the information processing apparatus 100 according to the third embodiment.
A functional configuration of the information processing apparatus 100 according to Embodiment 3 will be described with reference to FIG.

  In addition to the configuration described in the information processing apparatus 100 and the first embodiment (see FIG. 1), a forced termination warning unit 300 is provided.

  The forced termination warning unit 300 notifies the process that is forcibly terminated when the process forced termination unit 130 starts the forced termination of the process before the process forced termination unit 130 forcibly terminates the process. To do.

  The device storage unit 190 stores an end warning table 195.

FIG. 25 is a diagram illustrating an example of the end warning table 195 according to the third embodiment.
An example of the end warning table 195 in the third embodiment will be described with reference to FIG.

  The end warning table 195 (an example of a warning notification necessity storage unit) is data regarding conditions for notifying a forced end warning.

For example, the end warning table 195 associates “warning occurrence value”, “warning time”, “warning measurement time”, and “warning notification necessity flag”.
“Warning occurrence value” indicates the amount of memory used when a forced termination warning is notified.
“Warning time” indicates a time interval for notifying a forced termination warning.
“Warning measurement time” indicates the time (warning measurement time) that has elapsed since the last warning notification.
The “warning notification necessity flag” indicates, for each process, a process identifier and a flag value indicating whether it is necessary to warn of forced termination.

The warning occurrence value set in the end warning table 195 is smaller than the forced end start value set in the forced end table 191.
Thereby, a warning of forced termination is notified before the forced termination of the process is started.

FIG. 26 is a configuration diagram of the forced termination warning unit 300 according to the third embodiment.
The configuration of forced termination warning unit 300 in the third embodiment will be described with reference to FIG.

  The forced termination warning unit 300 includes a warning target identification unit 310 (an example of a warning occurrence value determination unit), a warning notification registration unit 320, a warning notification unit 330, and a warning time measurement unit 340.

  The warning target specifying unit 310 specifies a process that is forcibly terminated when the process is forcibly terminated before the process is forcibly terminated.

The warning notification registration unit 320 sets the warning notification necessity flag set in the end warning table 195 in response to the warning notification registration request.
The warning notification registration request is sent from a process requesting a warning notification for notifying that it is forcibly terminated.

The warning notification unit 330 refers to the warning notification necessity flag of the process identified by the warning target identification unit 310 among the warning notification necessity flags set in the end warning table 195, and performs warning notification to the process. Determine whether or not.
If it is determined that a warning notification to the process is to be performed, the warning notification unit 330 notifies the process that the process is forcibly terminated.

  The warning time measuring unit 340 measures the time (warning time) that has elapsed since the previous warning notification.

FIG. 27 is a flowchart illustrating forced termination warning processing according to the third embodiment.
The forced termination warning process in the third embodiment will be described with reference to FIG.

In S310, the warning time measurement unit 340 initializes the warning measurement time.
That is, the warning time measurement unit 340 sets the warning measurement time set in the end warning table 195 (see FIG. 25) to “0 seconds”.
After S310, the process proceeds to S311.

In S311, the warning time measurement unit 340 waits for the unit elapsed time (for example, 1 second) to elapse, and adds the unit elapsed time to the warning measurement time when the unit elapsed time has elapsed.
After S311, the process proceeds to S312.

In S312, the warning time measurement unit 340 refers to the end warning table 195 (see FIG. 25) and determines whether the warning measurement time is equal to or longer than the warning time.
When the warning measurement time is equal to or longer than the warning time (YES), the warning time measurement unit 340 calls the warning target specifying unit 310, and the process proceeds to S320.
If the warning measurement time is less than the warning time (NO), the process returns to S311.

In S320, the warning target specifying unit 310 specifies the process to be warned.
Details of the warning target specifying process (S400) will be described separately.
After S320, the warning target specifying unit 310 calls the warning notification unit 330, and the process proceeds to S330.

In S330, the warning notification unit 330 determines whether there is an unselected process among the warning target processes specified by the warning target specifying unit 310.
If there is an unselected process, the process proceeds to S331.
If there is no unselected process, the forced termination warning process ends.

In step S <b> 331, the warning notification unit 330 selects one unselected process among the warning target processes specified by the warning target specifying unit 310.
After S331, the process proceeds to S332.

In step S <b> 332, the warning notification unit 330 determines whether to notify the selected process of a forced termination warning.
That is, the warning notification unit 330 refers to the warning notification necessity flag associated with the process identifier of the selected process among the warning notification necessity flags set in the end warning table 195 (see FIG. 25).
Then, the warning notification unit 330 determines whether the value of the referred warning notification necessity flag is “required” or “unnecessary”.
If the value of the warning notification necessity flag is “necessary”, the process proceeds to S333.
If the value of the warning notification necessity flag is “unnecessary”, the process returns to S330.

In step S333, the warning notification unit 330 sends a warning notification for warning the forced termination to the selected process.
For example, the information processing apparatus 100 registers in advance a callback function for sending a warning notification, and the warning notification unit 330 sends the warning notification by executing the callback function.
After S333, the process returns to S330.

FIG. 28 is a flowchart showing the warning target specifying process (S320) in the third embodiment.
The warning target specifying process (S320) in the third embodiment will be described with reference to FIG.

In S321, the warning target specifying unit 310 acquires the memory usage (an example of a system characteristic value) and the forced termination stop value of the information processing apparatus 100 from the forced termination table 191.
Further, the warning target specifying unit 310 acquires a warning occurrence value from the end warning table 195.
After S321, the process proceeds to S322.

In S322, the warning target specifying unit 310 compares the memory usage amount of the information processing apparatus 100 with the warning occurrence value.
If the memory usage of the information processing apparatus 100 is equal to or greater than the warning occurrence value (YES), the process proceeds to S323.
When the memory usage of the information processing apparatus 100 is less than the warning occurrence value (NO), the warning target specifying process (S320) ends.

In S <b> 323, the warning target specifying unit 310 determines the process forcible termination order in the same manner as the process forcible termination unit 130.
That is, the warning target specifying unit 310 acquires a memory usage amount (an example of a process characteristic value) for each process from the setting value parameter table 194 and acquires a forced termination setting value for each process from the forced termination setting value table 193.
Next, the warning target specifying unit 310 calculates a forced termination ranking value for each process by calculating a forced termination ranking formula using the memory usage and the forced termination setting value for each process.
Then, the warning target specifying unit 310 determines the forced termination rank of the process based on the forced termination rank value for each process.
After S323, the process proceeds to S324.

In S324, the warning target specifying unit 310 selects one process as a warning target process in the order of the forced termination order of the processes.
After S324, the process proceeds to S325.

In S325, the warning target specifying unit 310 calculates a predicted value of the memory usage (an example of the system characteristic value) of the information processing apparatus 100 when each process selected as the warning target process is forcibly terminated.
For example, the warning target specifying unit 310 predicts the memory usage amount of the information processing device 100 by subtracting the total memory usage amount of each process selected as the warning target process from the memory usage amount of the information processing device 100. Calculate as
After S325, the process proceeds to S326.

In S326, the warning target specifying unit 310 compares the predicted value of the memory usage of the information processing apparatus 100 with the forced termination stop value.
When the predicted value of the memory usage of the information processing apparatus 100 is larger than the forced termination stop value (YES), the process returns to S324.
When the predicted value of the memory usage of the information processing apparatus 100 is equal to or less than the forced termination stop value (NO), the warning target specifying process (S320) ends.

According to the third embodiment, the information processing apparatus 100 can warn the process that may be forcibly terminated of the forced termination.
A process that has been warned of forced termination avoids forced termination by changing the forced termination setting value by a setting value change request, or by reducing the memory termination amount (an example of a process characteristic value) to lower the forced termination rank value. be able to. In addition, a process that is warned of forced termination can reduce the memory usage, thereby eliminating the memory shortage of the information processing apparatus 100.

In the third embodiment, for example, the following process management apparatus (100) has been described. The corresponding code or name is shown in parentheses.
The process management apparatus includes a warning occurrence value determination unit (310), a warning target identification unit (310), and a warning notification unit (330).
The warning occurrence value determination unit determines whether or not the system characteristic value indicating the usage amount of the computer resource is equal to or greater than a warning occurrence value that is smaller than a forced termination start value at which the process is forcibly terminated.
When the warning occurrence value determining unit determines that the system characteristic value is equal to or greater than the warning occurrence value, the warning target specifying unit is configured to store the plurality of processes stored in the forced termination set value storage unit (193). Based on the respective forced termination setting values, a process that is forcibly terminated when the system characteristic value is equal to or greater than the forced termination start value among the plurality of processes is identified as a warning target process.
The warning notification unit provides a warning notification for notifying the warning target process specified by the warning target specifying unit that the process is forcibly terminated when the system characteristic value is equal to or greater than the forced termination start value. send.

The process management device includes a warning notification necessity storage unit (195) that stores a process identifier and a warning notification necessity flag value indicating whether the warning notification is necessary for each of the plurality of processes.
The warning notification unit is configured to notify the warning based on a warning notification necessity flag value associated with a process identifier of the warning target process among warning notification necessity flag values stored in the warning notification necessity storage unit. Whether or not is necessary is determined.
The warning notification unit sends the warning notification to the warning target process when it is determined that the warning notification is necessary.

  Each embodiment may be combined in whole or in part to the extent that no contradiction occurs.

  DESCRIPTION OF SYMBOLS 100 Information processing apparatus, 101 Process data, 110 Process execution part, 120 System characteristic value acquisition part, 130 Process forced termination part, 190 Device memory | storage part, 191 Forced termination table, 192 Process characteristic value table, 193 Forced termination setting value table, 194 set value parameter table, 194C condition parameter table, 194D dynamic parameter table, 195 end warning table, 200 forced end set value management unit, 210 process request accepting unit, 220 set value changing unit, 230 change time measuring unit, 240 interval Time measurement unit, 250 change notification registration unit, 260 change notification unit, 300 forced termination warning unit, 310 warning target identification unit, 320 warning notification registration unit, 330 warning notification unit, 340 warning time measurement unit, 901 CPU, 902 Bus, 903 ROM, 904 RAM, 905 communication board, 911 display, 912 keyboard, 913 mouse, 914 drive, 920 magnetic disk device, 921 OS, 922 program group, 923 file group.

Claims (10)

A forced termination setting value storage unit for storing a process identifier for identifying a process for each process of a plurality of processes, and a forced termination setting value for determining an order in which the plurality of processes are forcibly terminated;
A change for storing a process identifier and a change maintaining time indicating the length of time for which the forced termination setting value is changed when the forced termination setting value is changed for each of the plurality of processes. A maintenance time storage unit;
A change request receiving unit that receives a change request for changing a forced termination setting value of the request process to a request setting value from a request process that is a process included in the plurality of processes;
Based on the change request received by the change request accepting unit, a forced termination setting value associated with a process identifier of the requesting process is selected from the forced termination setting values stored in the forced termination setting value storage unit. , A set value changing unit for changing to the required set value;
A change time measuring unit that measures a time elapsed after the forced end set value is changed to the required set value by the set value changing unit as a change time;
Whether or not the change time measured by the change time measurement unit exceeds the change maintenance time associated with the process identifier of the request process among the change maintenance times stored in the change maintenance time storage unit. A change time determination unit for determining,
When the change time determination unit determines that the change time has exceeded the change maintenance time, the set value change unit sets the forced end set value of the request process to an initial value of the forced end set value. A process management apparatus characterized by returning to a certain initial setting value. The change request reception unit receives a first change request from the request process as the change request, and then receives a second change request from the request process before the change time exceeds the change maintenance time.
The setting value changing unit changes the forced termination setting value of the request process based on the second change request after changing the forced termination setting value of the request process based on the first change request. And
The change time measurement unit starts measuring the change time when the forced termination setting value of the request process is changed based on the first change request, and the forced termination setting value of the request process is The process management apparatus according to claim 1, wherein when the change time is changed based on the second change request, the change time measurement is continued without redoing the change time measurement. The process management device includes:
A change for storing a process identifier and a change prohibition time indicating a length of time during which the change of the forced end setting value is prohibited after the forced end setting value is returned to the initial setting value for each of the plurality of processes. A prohibited time storage unit;
An interval time measuring unit that measures an elapsed time after the forced termination setting value of the request process is returned to the initial setting value by the setting value changing unit; and
Whether or not the interval time measured by the interval time measurement unit has exceeded the change prohibition time associated with the process identifier of the request process among the change prohibition times stored in the change prohibition time storage unit. An interval time determination unit for determining,
The change request receiving unit receives a new change request from the request process,
The set value changing unit, when the change request receiving unit receives the new change request after the interval time determining unit determines that the interval time has exceeded the change prohibition time, the new change request 3. The process management apparatus according to claim 1, wherein the forced termination setting value of the request process is changed based on the process. A change notification unit that sends a change notification for notifying that the forced termination setting value has been changed to the requesting process when the forced termination setting value of the request process is changed by the setting value changing unit; The process management apparatus according to any one of claims 1 to 3, wherein The process management device includes:
A change notification necessity storage unit that stores a process identifier and a change notification necessity flag value indicating necessity of change notification for each of the plurality of processes.
The change notification unit, when the set value change unit changes the forced termination setting value of the request process, out of the change notification necessity flag value stored in the change notification necessity storage unit of the request process Based on the change notification necessity flag value associated with the process identifier, the necessity of the change notification is determined,
The process management apparatus according to claim 4, wherein the change notification unit sends the change notification to the requesting process when it is determined that the change notification is necessary. The process management device includes:
A setting upper limit value storage unit that stores a process identifier and a setting upper limit value that is an upper limit value of the forced termination setting value for each of the plurality of processes,
The set value changing unit compares a set upper limit value associated with a process identifier of the request process among the set upper limit values stored in the set upper limit value storage unit and the requested set value;
The setting value changing unit changes the forced termination setting value of the request process to the request setting value on condition that the request setting value is not more than the setting upper limit value of the request process. The process management apparatus according to claim 1. A warning occurrence value determination unit that determines whether or not a system characteristic value representing the amount of use of a computer resource is equal to or greater than a warning occurrence value that is smaller than a forced termination start value at which a process is forcibly terminated;
When the warning occurrence value determination unit determines that the system characteristic value is greater than or equal to the warning occurrence value, based on each forced termination setting value of the plurality of processes stored in the forced termination setting value storage unit A warning target specifying unit that specifies, as a warning target process, a process that is forcibly terminated when the system characteristic value of the plurality of processes is equal to or greater than the forced termination start value;
A warning notification unit for sending a warning notification for notifying that the warning target process specified by the warning target specifying unit is forcibly terminated when the system characteristic value is equal to or greater than the forced termination start value; The process management apparatus according to claim 1, further comprising a process management apparatus. The process management device includes:
A warning notification necessity storage unit that stores a process identifier and a warning notification necessity flag value indicating necessity of the warning notification for each of the plurality of processes;
The warning notification unit is configured to notify the warning based on a warning notification necessity flag value associated with a process identifier of the warning target process among warning notification necessity flag values stored in the warning notification necessity storage unit. Determine the necessity of
The process management apparatus according to claim 7, wherein the warning notification unit sends the warning notification to the warning target process when it is determined that the warning notification is necessary. A process management method that uses a process management device that includes a forced termination set value storage unit, a change maintenance time storage unit, a change request reception unit, a set value change unit, a change time measurement unit, and a change time determination unit. And
The forced termination setting value storage unit stores, for each of a plurality of processes, a process identifier for identifying a process and a forced termination setting value for determining an order in which the plurality of processes are forcibly terminated. A storage unit,
The change maintaining time storage unit is a process identifier for each of the plurality of processes, and a change indicating a length of time for which the forced termination setting value is maintained when the forced termination setting value is changed A storage unit for storing the maintenance time,
The change request receiving unit receives a change request for changing a forced termination setting value of the request process to a request setting value from a request process which is a process included in the plurality of processes;
Based on the change request received by the change request accepting unit, the set value changing unit is associated with a process identifier of the request process among the forced end set values stored in the forced end set value storage unit. Change the forced termination setting value to the required setting value,
The change time measurement unit measures the time elapsed after the forced end set value is changed to the required set value by the set value change unit as a change time,
The change time measured by the change time measurement unit by the change time determination unit is the change maintenance associated with the process identifier of the request process among the change maintenance times stored in the change maintenance time storage unit Determine if the time has been exceeded,
When the set value changing unit determines that the change time exceeds the change maintaining time by the change time determining unit, the forced end set value of the request process is set to an initial value of the forced end set value. A process management method characterized by returning to a certain initial setting value.   A process management program for causing a computer to function as the process management apparatus according to claim 1.

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