JP2001125687A - Computer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a computer system which can protect important data, that an application performing an important process has, by inexpensive system constitution when abnormality of a commercial power source as a power supply is detected. SOLUTION: A power unit 3 when detecting abnormality of a commercial power source 1 being a power supply sends a power source abnormality interruption notice to switch over the power supply, and a large-capacitance capacitor 4 installed in a power unit 3 supplies its own electric power through the switching; when a CPU indicates an emergency saving process for important data in response to the power source abnormality interruption and a system emergency stopping process part sends an end signal to an application which is performing an important process, the application saves its own important data in emergency within a supply time of the electric power that the large- capacitance capacitor has.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer system for stopping a system when power supply from a commercial power supply is interrupted.

[0002]

2. Description of the Related Art A commonly used computer system performs a system stop process in response to an instruction from a user or an application when the system is stopped. The executed system stop processing protects data used on the computer system and ensures consistency.

FIG. 11 shows the design and implementation of UNIX 4.3BSD.
(The Design and Implementation of the 4.3BSD UNIX
Operating System) "(issued by Maruzen Co., Ltd., 1991), page 431, page 432. By instructions from the user or from the application,
The processing according to this flowchart is performed, and the system is stopped.

When a system stop request is issued in response to an instruction from a user or an application, in step S 101, normal stop of the system is performed, information necessary at the next start-up, the time when the system stop request is issued, and the like. Is recorded on the secondary storage device.

Next, in step S102, a termination signal is sent to all user processes operating on the system, and the individual user processes are urged to perform termination processing inside the process. In step S103, the information of the i-node and the data block in the cache memory is written back to the file system. Further, in step S104, all file systems are unmounted, and in step S10
The operation of the CPU is stopped in step 5, and the system stop processing is completed.

FIG. 12 is a schematic configuration diagram of a conventional power failure management device described in Japanese Patent Application Laid-Open No. 7-160370. In the figure, a workstation 110 has an uninterruptible power supply 11
1 and the uninterruptible power supply 111 is connected to a commercial power supply (not shown).

[0007] Applications 112, 113, 114
Is an application that runs on the workstation 110. The application 112 is an application having a function of managing a production schedule and cannot be stopped suddenly. Application 113
Is an application that controls the facility communication function, and the application 114 is an application that controls the monitor function.

[0008] The process monitoring unit 115 has a function of monitoring the processing state of these applications 112, 113, and 114, and also has a function of rewriting the table of the process activation history storage unit 116. The process priority storage unit 117 stores the priorities of applications such as the applications 112, 113, and 114 executed on the workstation 110. The process activation history storage unit 116 stores the workstation 110
And stores information for grasping which application is running or stopped.

The CPU / I / O load detector 118 detects the load status of the CPU and I / O in the workstation 110 via the process monitor 115. The shutdown processing unit 119 includes a process priority stored in the process priority storage unit 117, history information regarding the application stoppage stored in the process startup history storage unit 116, and CPU / I /
CPU and I / O detected by the O load detection unit 118
Has a function of determining which application is to be stopped and in what order based on the load status.

The uninterruptible power supply 111 has a function of detecting a power failure state and a function of switching from a commercial power supply to an emergency power supply when a power failure state is detected. Function as The operating system 120 outputs a start command to the shutdown processing unit 119 in response to a power failure occurrence signal output from the uninterruptible power supply 111 in accordance with the detection of the power failure state.

[0011] Shutdown processing unit 1 receiving this instruction
19 outputs a stop processing request to the applications 112, 113 and 114,
After shutting down the workstations 3, 114, the workstation 110 is shut down so that the workstation 110 can be stopped.

When a power failure occurs in the commercial power supply, the uninterruptible power supply 111 detects the occurrence of the power failure and outputs a power failure occurrence signal to the operating system 120. The operating system 120 outputs a start command to the shutdown processing unit 119 in response to the input of the power failure occurrence signal. Shutdown processing section 119
In response to this command, the process priority stored in the process priority storage unit 117, the history information on the application start / stop recorded in the process startup history storage unit 116, the CPU / I / O load detection unit In consideration of each of the load states stored in the power supply 118, the process of the application currently being executed is
The execution order of the application programs is controlled so that the processing is completed within the 11 maintenance time.

FIG. 13 is a schematic configuration diagram of a conventional computer system described in Japanese Patent Application Laid-Open No. 6-266478. In the figure, 201 is a commercial power supply, 202 is an uninterruptible power supply,
Reference numeral 203 denotes a computer system to which power is supplied from the uninterruptible power supply 202. The uninterruptible power supply 202 includes a charging device 204, a power failure / recovery detection circuit 205, and a switch 206.

Normally, the computer system 203 is connected to the power line 20 from the commercial power supply 201 via the uninterruptible power supply 202.
7 is supplied with electric power. When a failure occurs in the commercial power supply 201, the uninterruptible power supply 202
The power recovery detection circuit 205 detects that a power failure has occurred, and notifies the computer system 203 of the occurrence of the power failure via the power failure signal line 208. At the same time, the switch 206 is controlled to start supplying power from the charging device 204. Similarly, when the power is restored after the occurrence of the power failure, the computer system 203 is notified via the restoration signal line 209 that the power has been recovered from the power failure.

FIG. 14 is a configuration diagram showing an example of the computer system 203. The computer system 203 includes a processor 210, an OS 212 running on the processor 210, and an OS2.
AP (application) 213 executed by the server 12
211, a system monitoring device 214, a power control device 215, an IOP 216 controlling I / O,
The configuration includes a disk device 217 connected to the OP 216. The power failure signal line 208 and the restoration signal line 209 shown in FIG. 13 are connected to the power control device 215.

When the system monitor 214 receives a power failure notification from the uninterruptible power supply 202 via the power failure signal line 206, the system monitor 214 generates a power failure interrupt 218 and notifies the processor 210 of the power failure. . Also,
When the system monitoring device 214 receives a notification of recovery from a power failure via the power recovery signal line 209, it generates a power recovery interrupt 219 and notifies the processor 210 of it.

The outline of the operation from the occurrence of a power failure until recovery is as follows. First, a failure occurs in the commercial power supply 201. A power failure / recovery detection circuit 205 of the uninterruptible power supply 202 detects a power failure and supplies power to the computer system 203 from the commercial power supply 201 from the uninterruptible power supply 20.
Switch to 2. The system monitoring device 214 receives a power failure from the uninterruptible power supply 202 via the power failure signal line 208, generates a power failure interrupt 218, and notifies the OS 212 running on the processor 210 of the occurrence of the power failure.

Upon receiving the power interruption 218, the OS 212 interrupts the processing of the AP 213 and executes a shutdown processing for saving the contents of the memory 211 to the disk device 217. The following two methods have been proposed for this shutdown processing.

First, in the first method, when the OS 212 receives the power failure interrupt 218, all the running APs 21
3 requests end processing. The AP 213 executes a termination process in response to this, and when the termination is completed, the OS 21
2. Return the completion notification to 2. Then, the OS 212 executes the AP 213
, The contents of the memory 211 are stored in the disk device 217 and the system is stopped.

In the first method, when the failure of the commercial power supply 201 recovers during the shutdown processing, the power failure / recovery detection circuit 205 of the uninterruptible power supply 202 detects that the commercial power supply 201 has recovered from the failure. Then, the power supply to the computer system 203 is switched to the commercial power supply 201.
Further, the system monitoring device 214 receives from the uninterruptible power supply 202 via the restoration signal line 209 that the power supply has recovered from the power failure.

Next, the system monitoring device 214 generates a power restoration interrupt 219, and notifies the OS 210 executing the shutdown processing on the processor 210 that the power supply has recovered from the power failure.
Notify 2. OS 21 notified of power restoration interrupt 219
2 invalidates the contents of the memory 211 stored in the disk device 217, activates the terminated AP 213, refers to the contents of the memory 211 after the activation is completed, and executes immediately before the power failure interrupt 218 occurs. The processing is resumed from the instruction following the instruction that was issued.

Next, in the second method, when the OS 212 receives the power failure interrupt 218,
Also, the end processing is not requested, the contents of the memory 211 are saved in the disk device 217 as a memory image, and the system is stopped. As a result, the status information of the AP 213 being executed before the start of the shutdown process is stored in the disk device 217 as it is. When starting the system, the information saved in the disk device 217 is stored in the memory 2.
11, the system can be started up by reproducing the system state immediately before the start of the shutdown processing.

In the second method, when a failure is recovered from the commercial power supply 201 during the shutdown processing, the power failure / recovery detection circuit 205 of the uninterruptible power supply 202 detects that the commercial power supply 201 has recovered from the failure. Then, the power supply to the computer system 203 is switched to the commercial power supply 201. In addition, the system monitoring device 214
From the power supply via the power recovery signal line 209.

Next, the system monitoring unit 214 generates a power restoration interrupt 219, and notifies the OS 21 executing the shutdown processing on the processor 210 that the power supply has been recovered from the power failure.
Notify 2. OS 21 notified of power restoration interrupt 219
2 invalidates the contents of the memory 211 written in the disk device 217, refers to the contents of the memory 211, and resumes from the instruction following the instruction executed immediately before the occurrence of the power failure interrupt 218.

[0025]

As described above, in the conventional computer system stop system, when a system stop request is issued, for example, in accordance with an instruction from a user or an instruction from an application, the system is safely stopped. And then stop the CPU. However, in such a system, when an abnormality occurs in the commercial power supply, or when the uninterruptible power supply is not provided, the system stop processing takes a long time (about 1 second or more). Even if power is supplied for a short time (approximately less than one second) by the large-capacity capacitor provided in the system, the system stop processing does not end and the power is turned off during the processing, resulting in data being processed on the system. Protection / integrity cannot be ensured.

In order to avoid such a situation, an uninterruptible power supply is introduced so that even when an abnormality occurs in the commercial power supply,
A system was also devised that enables the normal operation of the computer system with the emergency power supplied by the uninterruptible power supply, and also performs a safe shutdown process of the computer system based on the power failure notification from the uninterruptible power supply. .

However, according to this method, if the commercial power supply abnormality is recovered during the system stop processing at the time of the commercial power supply abnormality, the system stop processing is interrupted, and the processing on the system which was performed before the commercial power supply abnormality occurred is performed. Although it is possible to continue, uninterruptible power supplies are generally expensive devices, and if many computer systems are introduced,
Installing uninterruptible power supplies in all of them is enormously expensive.

In addition, due to the nature of the device, the performance of the emergency power supply unit (storage battery) inside the uninterruptible power supply deteriorates due to energization and charging processing for many years. When uninterruptible power supply with deteriorated performance may not be able to guarantee the normal operation of the computer system and the safe system shutdown processing to ensure important data protection / integrity when commercial power failure occurs There is.

In the system using the uninterruptible power supply,
System termination processing is performed by notifying all applications running on the computer system of termination or by saving all memory areas. Therefore, it takes a long time for the system stop processing,
For example, it may save data that has been expanded in memory for reference only, or may save data that is not important due to the nature of the computer system. When the abnormality is recovered, the time required for the suspension processing of the system stop processing and the recovery continuation processing also becomes longer.

As a result, particularly when a control device requiring real-time control is connected to the outside and the control is performed by an important application on the computer system, the system is stopped when the abnormality of the commercial power supply is recovered. Since the time spent for the interruption processing and the return continuation processing is long, there is a risk that control of a control device that requires real-time control may not be able to keep up.

The present invention has been made in order to solve the above-mentioned problems, and has a short-time (approximately less than one second) power supply which can be implemented by a large-capacity capacitor provided in a power supply unit in a computer system in advance. Protection of important data on the computer system by sending an end notification signal only to applications that are defined as important at the time of system construction that operate on the computer system within the range of
It is an object of the present invention to establish an inexpensive computer system that can ensure consistency and that can stop the computer system without using an expensive uninterruptible power supply.

Further, the processing time spent in the system stop processing when a commercial power supply abnormality occurs is reduced to a short time, and the time spent in the system stop processing interruption processing and the recovery continuation processing when the commercial power supply abnormality is recovered is reduced. Establish a computer system that enables real-time control even when external control devices that require real-time control are connected and controlled by important applications on the computer system by suppressing the time to a short time. With the goal.

[0033]

According to a first aspect of the present invention, there is provided a power supply switching unit for notifying a power failure interrupt and switching a power supply when a power failure of a commercial power supply as a power supply is detected. A large-capacity capacitor that is installed in the power switching unit and supplies the retained power based on the switching of the power supply source by the power switching unit, and is executed based on a power failure interrupt notified by the power switching unit. CPU that stops the current processing operation, further instructs emergency save processing of important data, a system emergency stop processing unit that sends an end signal in accordance with the instruction from the CPU, and a system emergency stop processing unit that transmits the end signal. Based on the end signal, the emergency save process of the important data held is performed within the supply time of the power supplied by the large-capacity capacitor. Those having a publication, a.

According to a second aspect of the present invention, there is provided a system normal stop processing unit for normally stopping the system in accordance with an instruction from the CPU, wherein the power switching unit detects that the power supply abnormality of the commercial power supply has been recovered. Notifying the CPU of a power restoration interrupt, the CPU stopping the emergency save process of important data performed by the application based on the power restoration interrupt notified by the power switching unit. It instructs the system emergency stop processing unit and further instructs the system normal stop processing unit to stop the system normally.

According to a third aspect of the present invention, there is provided a system restart processing section for restarting the system. The CPU restarts the system after the processing for normally stopping the system is completed by the system normal stop processing section. This is instructed to the system restart processing unit.

The fourth invention comprises an application re-initialization unit for re-initializing the application,
The PU instructs the application re-initialization unit to re-initialize the application after the process of normally stopping the system by the system normal shutdown processing unit.

In a fifth aspect of the present invention, the CPU notifies the interruption of the emergency save process of important data performed by the application based on the power restoration interrupt notified by the power switching unit. Is to interrupt the emergency save process of important data that is being executed based on the notification from the CPU, and to resume the processing operation from the process content immediately before the emergency save process of important data is performed.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1. Embodiment 1 will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of the computer system according to the first embodiment. In FIG. 1, reference numeral 1 denotes a commercial power supply, 2 denotes a computer system as hardware operated by being supplied with power from the commercial power supply 1, 3 denotes a power supply unit inside the computer system 2, and 4 denotes a power supply unit. The large-capacity capacitor has a function capable of supplying power in a short time (approximately less than one second) when a power failure occurs in the commercial power supply 1. 5 is C in the computer system 2
Represents a PU (Central Processing Unit). The power supply unit 3 notifies a power failure interrupt to the CPU 5 when an abnormality occurs in the commercial power supply 1 or notifies a power restoration interruption when the commercial power supply 1 in which the abnormality has occurred is restored. Or it is possible.

Reference numeral 6 denotes a secondary storage device connected to the computer system 2, which is connected to a power supply unit 3 inside the computer system 2 and is supplied with power. Reference numeral 7 denotes an entire software function that operates on the computer system 2. Reference numeral 8 denotes a system emergency stop processing unit that, when a power failure occurs in the commercial power supply 1, the CPU 5 that has received the power failure interrupt performs processing as an interrupt handler.

Reference numeral 9 denotes an application which is defined as the most important at the time of constructing the system and performs important processing (hereinafter, application is referred to as AP), and reference numeral 10 denotes an AP which does not perform important processing. The system emergency stop processing unit 8 operates in the kernel area, and performs an AP 9 that performs important processing and an AP 10 that does not perform important processing.
Both operate in the user area. In addition to this, the computer system 2 includes a large number of hardware-related peripheral devices and a large number of operating software, but description thereof is omitted here.

When the commercial power supply 1 is operating normally,
The computer system 2 operates using electric power supplied from the commercial power supply 1 to the power supply unit 3. At this time, the large-capacity capacitor 4 repeats charging and discharging in order to stabilize the power supplied from the commercial power supply 1 to a constant state.
It has a certain amount of electricity. The CPU 5 inside the computer system 2 performs processing operations of the AP 9 performing important processing and the AP 10 not performing important processing as a normal processing, or a secondary storage device based on a request of another application. 6, input and output of data with other peripheral devices whose description is omitted here, and operation of other software whose description is omitted here.

Next, the operation will be described. FIG. 2 is a flowchart showing an operation sequence when an abnormality occurs in the commercial power supply 1. When a power failure occurs in the commercial power supply 1, the power supply unit 3 that has detected the power failure notifies the CPU 5 of a power failure interrupt in step S1, and performs a power supply source switching operation to the large-capacity capacitor 4. CPU that receives the power failure interrupt notified from the power supply unit 3
5 stops all the processing operations that have been performed so far, transfers control to the system emergency stop processing unit 8 registered in advance for power failure interrupt processing, and records the state at the time of system stop in step S2. The state recording when the system is stopped may include a time at which a power failure occurs in the commercial power supply 1, processing information of the CPU 5 at that time, information of an application running at that time, and the like.

Next, as a continuation of the processing of the system emergency stop processing section 8, in step S3, an end signal is sent to an application defined as AP9 which has previously performed important processing at the time of system construction. After receiving the end signal, the AP 9 that is performing important processing performs step S4.
The emergency save process of important data among the data handled internally is performed in a short time. At this time, of the data handled in the AP 9 performing important processing, in order to reduce the time required for the saving processing, data not determined to be important is discarded without performing the saving processing. You can do it.

In the emergency save process of the important data of the AP 9 performing the important process, there is a method of saving the important data in the secondary storage device 6 connected to the computer system 2. Computer system 2 omitted
May be evacuated to another peripheral device, such as a memory area with a battery backup function, connected to the device. After completing the emergency save process of important data by the AP 9 that is performing important processing, the system emergency stop processing unit 8 that has received the end processing completion notification from the AP 9 that is performing important processing performs CPU stop processing in step S5. The process ends. At this point, the computer system 2 stops operating.

As described above, according to this embodiment, only important data used by the AP 9 performing important processing is saved when an abnormality occurs in the commercial power supply 1, and data protection /
It is possible to maintain consistency. Also, compared to the case where a computer system is constructed using an uninterruptible power supply, an inexpensive computer system can be constructed because an uninterruptible power supply is not used.

Embodiment 2 Hereinafter, Embodiment 2 will be described with reference to the drawings. FIG. 3 is an explanatory diagram of the computer system according to the second embodiment. In the present embodiment, a system normal stop processing unit 20 is arranged in all software functions 7 operating on the computer system 2, and when the abnormality of the commercial power supply 1 is recovered, the power supply unit 3 System emergency stop processing unit 8 based on the transmitted power restoration interrupt
The processing shifts from the processing of (1) to the system normal stop processing unit 20, and the normal system stop processing is continued to stop all user processes on the computer system 2.

Next, the operation will be described. FIG. 4 is a flowchart illustrating an operation sequence when the abnormality of the commercial power supply 1 is recovered during the execution of the system emergency stop process due to the occurrence of the abnormality in the commercial power supply 1.

When a power supply abnormality occurs in the commercial power supply 1,
The operation sequence from the notification of the end signal to the AP 9 performing important processing to the emergency saving processing of important data is as follows.
Since this is the same as steps S1 to S4 in FIG. 2 described in the first embodiment, the description is omitted here. At this stage, when the abnormality that has occurred in the commercial power supply 1 is recovered, the power supply unit 3 detects that the power supply abnormality has been recovered, and a power recovery interruption is notified to the CPU 5 in step S6. Upon receiving the power restoration interrupt, the CPU 5 stops the processing of the system emergency stop processing unit 8 that has been performed up to that point, and shifts the processing to the system normal stop processing unit 20.

Thereafter, the system normal stop processing section 20 records on the secondary storage device 6 the information necessary for the normal stop of the system and the next start-up and the time when the system stop request was issued in step S7. . next,
In step S8, an end signal is sent to all the user processes operating on the system, and the individual user processes are encouraged to perform end processing inside the process. Also,
In step S9, the information of the i-node and the data block in the cache memory is written back to the file system. further,
In step S10, all file systems are unmounted. In step S11, the operation of the CPU 5 is stopped.
A process for completing the system stop process is performed.

As described above, according to the present embodiment, in addition to the effects shown in the first embodiment, during the system emergency stop processing based on the power supply abnormality that has occurred in commercial power supply 1, By transferring the processing to the system normal stop processing unit 20 when the abnormalities are recovered, it is possible to maintain data protection / consistency of all user processes operating on the system. In addition, since these operations are performed without using the uninterruptible power supply, it is possible to construct a computer system at lower cost than when a computer system is constructed using the uninterruptible power supply.

Embodiment 3 Hereinafter, Embodiment 3 will be described with reference to the drawings. FIG. 5 is an explanatory diagram of the computer system according to the third embodiment. In the present embodiment, the system restart processing unit 30 is arranged in the entire software function 7 operating on the computer system 2, and when the abnormality of the commercial power supply 1 is restored, the power supply unit 3 Based on the power restoration interrupt sent to the CPU 5, the processing is shifted from the processing of the system emergency stop processing unit 8 to the system restart processing unit 30 via the system normal stop processing unit 20.

The system restart processing section 30 continues the normal system restart processing following the normal system stop processing, thereby terminating all user processes on the computer system 2. To restart the computer system 2,
The original processing operation required for the computer system 2 is restarted.

Next, the operation will be described. FIG. 6 is a flowchart showing an operation sequence when the abnormality of the commercial power supply 1 is recovered during the execution of the system emergency stop process due to the abnormality of the commercial power supply 1.

When a power supply abnormality occurs in the commercial power supply 1,
When an abnormality occurred in the commercial power supply 1 is recovered during notification of an end signal to the AP 9 performing important processing and emergency saving processing of important data is performed, the power supply unit 3 that has detected the abnormality recovers power. Is recovered, a power restoration interrupt is notified to the CPU 5, and as a result, the flow of the processing operation in which the system normal stop processing is performed is the same as that in steps S1 to S10 in FIG. Therefore, the description is omitted here.

Thereafter, the processing of the system normal stop processing section 20 shifts to the system restart processing section 30, and
Then, a restart instruction is issued to the CPU 5 and the process ends. After the computer system 2 is restarted, a startup process defined in advance in system design is performed, and the computer system 2 restarts the originally required processing operation.

As described above, according to the present embodiment, in addition to the effects shown in the second embodiment, for example, an unmanned operation system or the like installed in a remote place can be restarted by the operator. Even if this is not the case, the computer system 2 automatically restarts, so that it is possible to reduce the amount of work required to arrange the operator and work, and to restart the computer system. In addition, it is possible to reduce the cost for these.

Embodiment 4 Hereinafter, Embodiment 4 will be described with reference to the drawings. FIG. 7 is an explanatory diagram of the computer system according to the fourth embodiment. In the present embodiment, the software functions 7 operating on the computer system 2 include A
The P re-initialization unit 40 is disposed, and when the abnormality of the commercial power supply 1 is recovered, the process of the system emergency stop processing unit 8 is performed based on the power recovery interrupt sent from the power supply unit 3 to the CPU 5 to re-initialize the AP. The process proceeds to the conversion unit 40.

The AP re-initialization unit 40 urgently transmits important data by the AP 9 performing important processing, which is performed based on a power failure interrupt sent from the power supply unit 3 to the CPU 5 due to an abnormality in the commercial power supply 1. Stop the evacuation process,
In addition, the CPU 9 performs the reinitialization processing of the AP 9 performing the important processing and the AP related to the AP 9 performing the important processing, and continues the operation of the computer system 2.

Next, the operation will be described. FIG. 8 is a flowchart illustrating an operation sequence when the abnormality of the commercial power supply 1 is recovered during the execution of the system emergency stop process due to the abnormality of the commercial power supply 1.

When a power supply abnormality occurs in the commercial power supply 1,
The operation sequence from the notification of the end signal to the AP 9 performing important processing to the emergency saving processing of important data is as follows.
Since this is the same as steps S1 to S4 in FIG. 2 described in the first embodiment, the description is omitted here.

At this stage, when the abnormality that has occurred in the commercial power supply 1 is recovered, the power supply unit 3 that has detected the abnormality detects that the power supply has been recovered, and in step S6 the CPU
5 is notified of a power restoration interrupt. Upon receiving the power restoration interrupt, the CPU 5 stops the processing of the system emergency stop processing unit 8 which has been performed up to that time, and the important data which has been performed based on the end signal from the system emergency stop processing unit 8 in step S31. Issue a notification to interrupt the emergency evacuation process.

After that, the processing of the system emergency stop processing section 8 shifts to the processing of the AP reinitialization section 3, and the AP reinitialization section 40 performs processing for the AP 9 that is performing important processing in step S 32. Notification is made to re-initialize the AP. This notification includes, in addition to the AP 9 performing the important processing, the A related to the operation of the AP 9 performing the important processing.
It may be sent to P at the same time.

The AP 9 that has performed the important processing upon receiving the re-initialization notification from the AP re-initialization unit 40 performs the re-initialization processing inside the AP, and executes it when the AP is started up for the first time. By re-executing the instruction, the processing of the AP 9 that is performing important processing is restarted.

Thereafter, when the reinitialization processing of the AP 9 performing important processing is completed, the CPU 5 is notified of the continuation of processing as a system of the computer system 2 in step S33, and the processing ends.

As described above, according to the present embodiment, in addition to the effects shown in the first embodiment, during the system emergency stop processing based on the power supply abnormality that has occurred in commercial power supply 1, When the abnormality that has been recovered is restored, the processing shifts to the AP re-initialization processing, whereby the AP 9 operating on the system and performing important processing is re-initialized, and the AP 9 performing important processing is re-initialized. AP related to the processing operation of
By reinitializing the AP, the emergency saving process of important data by the AP 9 performing important processing performed during the execution of the system emergency stop processing is interrupted, the AP itself is reinitialized, and the processing is newly performed. It is possible to start.

Further, the processing can be continued without stopping the operation of the computer system 2. In addition, because these operations are performed without using an uninterruptible power supply, compared to the case where a computer system is constructed using an uninterruptible power supply,
An inexpensive computer system can be constructed.

Embodiment 5 Hereinafter, Embodiment 5 will be described with reference to the drawings. FIG. 9 is an explanatory diagram of a computer system according to the fifth embodiment. In this embodiment, when the abnormality of the commercial power supply 1 is recovered by the system emergency stop processing unit 8 arranged in the entire software function 7 operating on the computer system 2, the power supply unit 3 sends the data to the CPU 5. Based on the transmitted power restoration interrupt, the system emergency stop processing unit 8 sends a termination processing stop notification to the AP 9 that is performing important processing, so that the AP performing important processing is transmitted.
9 interrupts the important data emergency evacuation processing performed based on the end signal received from the system emergency stop processing unit 8,
In addition, the processing operation of the computer system 2 is continued by restarting the processing from the instruction immediately before performing the important data emergency saving processing.

Next, the operation will be described. FIG.
6 is a flowchart showing an operation sequence when the abnormality of the commercial power supply 1 is recovered during the execution of the system emergency stop process due to the abnormality of the commercial power supply 1.

When a power supply abnormality occurs in the commercial power supply 1,
The operation sequence from the notification of the end signal to the AP 9 performing important processing to the emergency saving processing of important data is as follows.
Since this is the same as steps S1 to S4 in FIG. 2 described in the first embodiment, the description is omitted here.

At this stage, when the abnormality that has occurred in the commercial power supply 1 is recovered, the power supply unit 3 that has detected the abnormality detects that the power supply abnormality has been recovered.
5 is notified of a power restoration interrupt. Upon receiving the power restoration interrupt, the CPU 5 stops the processing of the system emergency stop processing unit 8 which has been performed up to that time, and the important data which has been performed based on the end signal from the system emergency stop processing unit 8 in step S31. Issue a notification to interrupt the emergency evacuation process.

Thereafter, the important data emergency evacuation process issued by the system emergency stop processing unit 8 is received, and the process proceeds to step S4.
The AP 9 performing important processing in step 1 interrupts the important data emergency saving processing that has been performed inside the AP 9 and returns the processing to the instruction that was being executed immediately before performing the important data emergency saving processing. Continue processing. Step S33
Then, the system emergency stop processing unit 8 notifies the CPU 5 of the continuation of the processing as the system of the computer system 2 and ends the processing.

As described above, according to the present embodiment, in addition to the effects shown in the first embodiment, the power generated by the commercial power supply 1 during the execution of the system emergency stop processing based on the power supply abnormality generated in the commercial power supply 1 When the abnormality that has been recovered is restored, the important data emergency saving process executed by the AP 9 performing the important process is interrupted, and the process is returned to the instruction immediately before the important data emergency saving process is executed. Thereafter, by continuing the normal processing, it becomes possible to continue the normal processing before the occurrence of the power failure in the commercial power supply 1.

Further, the processing can be continued without stopping the operation of the computer system 2. Further, since these operations are performed without using an uninterruptible power supply as in the conventional example, it is possible to construct an inexpensive computer system as compared with a case where a computer system is constructed using a low power supply.

[0074]

Since the present invention is configured as described above, it has the following effects.

In the first invention, when a power supply abnormality is detected in the commercial power supply which is the power supply source, the large-capacity capacitor in the computer system becomes the power supply source by switching the power supply source to supply the retained power. Inexpensive system can protect important data used by applications by performing emergency evacuation processing of important data held by applications that are performing important processing using the supplied power. can do.

In the second invention, when it is detected that the power supply abnormality of the commercial power supply has been recovered, the emergency save process of the important data performed by the application is stopped, and the system is stopped normally. The protection of important data used by the application can be realized by an inexpensive system.

According to the third aspect of the present invention, the cost of restarting the system can be reduced by restarting the system after the process of normally stopping the system ends.

According to the fourth aspect of the present invention, it is possible to protect important data used by the application by reinitializing the application after the process of normally stopping the system is completed. Can be realized by:

In the fifth invention, when it is detected that the power supply abnormality of the commercial power supply has been recovered, the emergency saving process of the important data performed by the application is interrupted, and the emergency saving process of the important data is further performed. By restarting the processing operation from the immediately preceding processing content, protection of important data used by the application can be realized by an inexpensive system.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a computer system according to a first embodiment.

FIG. 2 is a flowchart showing an operation sequence when an abnormality occurs in the commercial power supply 1 in the first embodiment.

FIG. 3 is an explanatory diagram of a computer system according to a second embodiment.

FIG. 4 is a flowchart showing an operation sequence when the abnormality of the commercial power supply 1 is recovered in the second embodiment.

FIG. 5 is an explanatory diagram of a computer system according to a third embodiment.

FIG. 6 is a flowchart showing an operation sequence when the abnormality of the commercial power supply 1 is recovered in the third embodiment.

FIG. 7 is an explanatory diagram of a computer system according to a fourth embodiment.

FIG. 8 is a flowchart showing an operation sequence when the abnormality of the commercial power supply 1 is recovered in the fourth embodiment.

FIG. 9 is an explanatory diagram of a computer system according to the fifth embodiment.

FIG. 10 is a flowchart showing an operation sequence when the abnormality of the commercial power supply 1 is recovered in the fifth embodiment.

FIG. 11 is a flowchart showing the operation sequence of a conventional system stop process.

FIG. 12 is a schematic configuration diagram of a conventional power failure management device.

FIG. 13 is a schematic configuration diagram of a conventional computer system.

FIG. 14 is a configuration diagram of a conventional computer system.

[Explanation of symbols]

1 commercial power supply, 2 computer systems, 3 power supply units,
4 Large-capacity capacitor, 5 CPU, 6 Secondary storage device, 8 System emergency stop processing unit, 9 Application performing important processing, 10 Application not performing important processing.

Claims (5)

[Claims] A power supply unit for notifying a power supply abnormality interrupt and switching a power supply source when detecting a power supply abnormality of a commercial power supply which is a power supply source; A large-capacity capacitor that supplies the stored power based on the switching of the power supply source by the switching unit, and the processing operation being executed is stopped based on the power failure interrupt notified by the power switching unit. A CPU for instructing an emergency data evacuation process, a system emergency stop processing unit for transmitting an end signal in accordance with the instruction from the CPU, and important data held based on the end signal transmitted by the system emergency stop processing unit Performing an emergency evacuation process within the supply time of the power supplied by the large-capacity capacitor. Computer system, wherein the door. 2. A system normal stop processing unit for normally stopping the system in accordance with an instruction from the CPU, wherein the power switching unit detects power recovery of the commercial power source when the power failure is recovered. Interrupt the above C
Notifying the PU, the CPU instructs the system emergency stop processing unit to stop the emergency saving process of important data performed by the application based on the power restoration interrupt notified by the power switching unit. 2. The computer system according to claim 1, further comprising: instructing the system normal stop processing unit to stop the system normally. 3. A system restart processing unit for restarting the system, wherein the CPU restarts the system after the system normal stop processing unit completes the process of normally stopping the system. 3. The computer system according to claim 2, wherein an instruction is given to a restart processing unit. 4. An application re-initialization unit for re-initializing the application, wherein the CPU re-initializes the application after the system normal stop processing unit completes the process of normally stopping the system. 3. The computer system according to claim 2, wherein an instruction is given to the application reinitialization unit. 5. The CPU notifies the CPU of an interruption of an emergency save process of important data performed by the application based on a power restoration interrupt notified by the power switching unit. 3. The computer system according to claim 2, wherein the emergency save process of the important data being executed is interrupted based on the notification from the computer, and the processing operation is resumed from the processing content immediately before the emergency save process of the important data is performed. .