JP3036468B2 - Exclusive control processing device, exclusive control processing method, and storage medium storing exclusive control processing program - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exclusive control processing device, an exclusive control processing method, and a storage medium storing an exclusive control processing program. The present invention relates to an exclusive control processing device of a parallel processing system that requests acquisition and uses shared resources.

[0002]

2. Description of the Related Art Conventionally, in a parallel processing system of this type, when a plurality of host computers use a shared resource, it is necessary to perform exclusive control so that the resource is not used by another host computer.

In an exclusive control processing device that performs exclusive control of a shared resource for each of a plurality of host computers, each host computer performs exclusive control, that is, acquisition of the right to use the shared resource (hereinafter, referred to as lock of the shared resource). When making a request to the exclusive control processing device, it is necessary to make a request using the entity name of a processing unit called a process, task or thread in the host computer which requests the lock of the shared resource.

The exclusive control of the above-mentioned shared resources is disclosed in Japanese Patent Application Laid-Open No. 7-84851. In the exclusive control described in this publication, shared data is allocated to different areas of the virtual space for each thread, means for giving an identifier of the area, means for accessing the shared data through the identifier, and processing according to the corresponding thread. It has means for setting a lock in the area and changing the lock type according to the type of access performed, and means for arbitrating lock requests of a plurality of threads for the same shared data.

[0005]

In the above-described conventional exclusive control of shared resources, even when a plurality of different tasks in the same host computer request a shared lock of the same shared resource, a lock request is made for each individual task. Need to do.

[0006] Therefore, a very large number of processes occur, and the overhead of the process is a problem. In particular, this problem is remarkable in an exclusive control processing device of a system for performing channel connection with a host computer.

When lock control is performed using the virtual lock function, one virtual lock request may continue to occupy a large amount of time.

[0008] Therefore, an object of the present invention is to solve the above-mentioned problem, and even when a plurality of different tasks in the same host computer request a shared lock of the same shared resource,
An object of the present invention is to provide an exclusive control processing device, an exclusive control processing method, and a storage medium storing an exclusive control processing program, which can reduce processing overhead and can greatly improve the performance of an exclusive control function.

[0009]

An exclusive control processing apparatus according to the present invention is an exclusive control processing apparatus for a parallel processing system including a plurality of host computers and a shared resource commonly used by the plurality of host computers. The request to acquire the right to use the shared resource from each of the plurality of host computers is a request to acquire the right to use the shared resource by the real task of each of the plurality of host computers; An identification means for identifying any one of a request for acquiring the right to use the same shared resource by the virtual task and a request for acquiring the right to use the same shared resource by the task; And a request for acquiring the right to use the shared resource by the virtual task in the order of input. And lock management table to accumulate,
A real task process for managing a request to acquire the right to use the shared resource by the real task based on the contents of the lock management table when the identification means identifies the request to acquire the right to use the shared resource by the real task; Means for managing a request to acquire the right to use the shared resource by the virtual task based on the contents of the lock management table when the request is identified as a request to acquire the right to use the shared resource by the virtual task. Virtual task processing means, and the virtual task
The shared resource for which the use right has been acquired by the acquisition request by
When an acquisition request from another computer occurs.
The host computer that has output the acquisition request by the virtual task
Unlock request that requests the data to temporarily release the shared resource.
Request and unlock request is no longer required
Attention management means for notifying that unlocking is unnecessary .

An exclusive control processing method according to the present invention is an exclusive control processing method for a parallel processing system including a plurality of host computers and a shared resource commonly used by the plurality of host computers. The request for acquiring the right to use the shared resource from each is a request for acquiring the right to use the shared resource by the real task of each of the plurality of host computers, and the same shared resource by the plurality of different real tasks of each of the plurality of host computers. Identifying a request to acquire the right to use the shared resource by the virtual task, wherein the request to acquire the right to use the shared resource is sent as one acquisition request; and a right to use the shared resource by the real task. And a request to acquire the right to use the shared resource by the virtual task in the order of input. Managing the request to acquire the right to use the shared resource by the real task based on the accumulated content of the acquisition request when the request is identified as the request to acquire the right to use the shared resource by the real task; and Managing a request to acquire the right to use the shared resource by the virtual task based on the accumulated content of the acquisition request when the request is identified as a request to acquire the right to use the shared resource by a task ;
The use right is acquired by the acquisition request by the virtual task;
Request from another computer for shared resources
The acquisition request was output by the virtual task when it occurred
Request the host computer to temporarily release the shared resource
Is notified and the unlock request is
Notifying that unlocking is unnecessary when it becomes necessary .

A storage medium storing an exclusive control processing program according to the present invention is a storage medium storing an exclusive control processing program for a parallel processing system including a plurality of host computers and a shared resource commonly used by the plurality of host computers. The exclusive control processing program is a medium, wherein the exclusive control processing program performs exclusive control of a request to acquire the right to use the shared resource from each of the plurality of host computers. The request for obtaining the right to use is a request for obtaining the right to use the shared resource by the real task of each of the plurality of host computers, and the request for obtaining the right to use the same shared resource by the plurality of different real tasks of each of the plurality of host computers. Acquisition of the right to use the shared resource by a virtual task sent as one acquisition request Request and the request for acquiring the right to use the shared resource by the real task and the request for acquiring the right to use the shared resource by the virtual task are stored in the order of input, and When the request for acquiring the right to use the shared resource is identified, the request for acquiring the right to use the shared resource by the real task is managed based on the accumulated contents of the request for acquiring the right to use the shared resource by the virtual task. A request for acquiring the right to use the shared resource by the virtual task based on the accumulated contents of the acquisition request when the virtual task
To the shared resource for which the use right has been acquired
When an acquisition request from another computer occurs
The host computer that has output the acquisition request by the virtual task
Unlock requesting the computer to temporarily release the shared resource
Notify the request and the unlock request is no longer needed
At times, the user is notified that unlocking is unnecessary .

That is, the virtual lock task type exclusive control processing device of the present invention manages a shared resource by a real processing unit (hereinafter, referred to as a real task) called a task or a thread in each host computer in task management. Separately from lock management, when a plurality of different real tasks in the same host computer request a shared lock of the same shared resource, the lock is not required by the real task but is locked by the virtual task representing the host computer. Virtual task processing means for performing a request, a lock management table for separately managing a lock request by a real task and a lock request by a virtual task, and a lock request source being a real task or a virtual task And a task identification means for identifying the task by a task name or a command.

Further, in the exclusive control processing device, when a lock request by a virtual task is simultaneously waiting for exclusion in a plurality of different shared resources, the lock request by the virtual task for each of the shared resources is put in each queue. .

Further, in the exclusive control processing device, when a lock request is issued from another host computer to the shared resource locked by the lock request by the virtual task, the shared resource is transmitted to the host computer which sent the lock request by the virtual task. An unlock requesting a temporary release of the resource is notified, and when the unlock becomes unnecessary, the unlock unnecessary is notified.

As a result, a plurality of lock requests are grouped into one, so that the number of accesses between the host computer and the exclusive control processing device can be reduced, and more efficient use of shared resources can be achieved. Become.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an exclusive control processing device according to one embodiment of the present invention. In the figure, the exclusive control processing device 1 includes a host interface unit 2, a task identification unit 3, a real task processing unit 4, a virtual task processing unit 5, and a lock management table 6.

The host interface unit 2 is connected to each of a plurality of host computers (not shown) and is a means for transmitting and receiving signals to and from each of the plurality of host computers.
The task identification unit 3 determines at least a task name or a command (for example, a real task lock request or a virtual task) as to whether a request for locking a shared resource (not shown) from the host interface unit 2 is due to a real task or a virtual task. Lock request identifier, lock request resource address, etc.).

Here, a lock request by a virtual task means that when a plurality of different real tasks request a shared lock of the same shared resource in each of a plurality of host computers, the lock request by the plurality of real tasks is one. It is summarized in one.

The case where a plurality of different real tasks or the like in the same host computer request the lock of the same shared resource means that the shared resource is used by another task or a task from another host computer. When a lock on the same shared resource is requested from a different real task while waiting for use, or a plurality of real tasks that occur within a predetermined period set in advance, or the same shared from multiple real tasks that occur simultaneously For example, a case where a resource lock is required.

The real task processing unit 4 has a function of checking the lock management table 6 when a task is identified as a real task by the task identification unit 3, and manages a lock request by the real task. Similarly, the virtual task processing unit 5 has a function of checking the lock management table 6 when a task is identified as a virtual task by the task identification unit 3, and manages a lock request by the virtual task.

The lock management table 6 stores the actual task processing unit 4
The table stores the real task lock request from the virtual task processing unit 5 and the virtual task lock request from the virtual task processing unit 5 in the input order, and manages the real task lock request and the virtual task lock request.

When a lock request is transferred from a plurality of host computers through the host interface unit 2, the task identification unit 3 identifies whether the lock request is a lock request by a real task or a lock request by a virtual task. The lock request is notified to the real task processing unit 4 or the virtual task processing unit 5 according to the identification result.

Real task processing unit 4 and virtual task processing unit 5
Communicates with the lock management table 6 to determine whether the requested resource can be used. The lock management table 6 has a function of managing and controlling each lock request.

Real task processor 4 and virtual task processor 5
Grants the lock request if the requested resource is available,
The host computer notifies the host computer via the task identification unit 3 and the host interface unit 2 that the lock request has been accepted and permitted. The notified host computer can use the shared resource according to the permission.

That is, normally, even when a plurality of different real tasks in the same host computer request a shared lock of the same shared resource, if only a lock request of the shared resource by the real task can be managed, exclusive control is performed. Communication with the processing device is required a plurality of times. However, when a plurality of different real tasks in the same host computer are shared locks of the same shared resource as in the exclusive control processing device 1 described above, By combining them and having a virtual task management function for virtually requesting, communication with the exclusive control processing device 1 can be realized at one time.

The exclusive control processing device 1 includes the task identification unit 3 and the virtual task processing unit 5, so that the virtual task requests the lock request for the same resource from different real tasks of the same host computer at once by using these functions. It becomes possible.

FIG. 2 is a block diagram showing the structure of the lock management table 6 of FIG. In the figure, the lock management table 6 includes a task hash table 61, a virtual task hash table 62, and a resource hash table 63.

The task hash table 61 shows a conventional real task table. Task hash table 6
Reference numeral 1 generates task entries AT611 and AT612 based on a shared resource lock request by a real task which is a processing unit called a task or a thread.

The virtual task hash table 62 is provided independently of the task hash table 61. The virtual task hash table 62 has independent task entries VT621 to VT621 for virtual tasks having the same task name.
Generating the VT 623 enables the same task to perform an exclusive wait on a plurality of resources 631,632.

Here, LE (Lock entry) 6
311, 6322 are task entries (virtual task VT621) that lock resources 631,632.
WE) (Wait entry)
Reference numerals 6312, 6313, 6323, 6324, and 6325 indicate task entries (real tasks AT611, AT612, virtual tasks VT622, 623, and the like) that are in a queue waiting for the release of the resources 631,632.

FIG. 3 is a block diagram showing a configuration example of a parallel processing system according to one embodiment of the present invention. In the figure,
Each of the plurality of host computers 11 to 1n is a shared resource 1
0 is commonly used. The exclusive control processing device 1 is configured as shown in FIG. 1, and includes a plurality of host computers 11 to 1n.
The lock request of the shared resource 10 by each real task or virtual task is arbitrated.

FIGS. 4 to 6 are flowcharts showing the processing operation of the exclusive control processing device 1 of FIG. The arbitration process of the lock request by the exclusive control processing device 1 will be described with reference to FIGS.

When a lock request is transferred from a plurality of host computers 11 to 1n through the host interface unit 2 (step S1 in FIG. 4), the task identification unit 3 identifies whether the lock request is a lock request by a real task. (Step S2 in FIG. 4).

When the task identification unit 3 identifies that the lock request is a lock request by a real task, it notifies the real task processing unit 4 that the lock request is identified as a lock request by a real task (step S3 in FIG. 4).

Upon receiving the notification from the task identification unit 3, the real task processing unit 4 refers to the lock management table 6 (FIG. 4).
Step S4), it is determined whether or not a shared resource (hereinafter, referred to as a requested resource) as a target of the lock request is usable (step S5 in FIG. 4).

When the real task processing unit 4 determines that the requested resource is available, the real task processing unit 4 permits the lock request, and the lock request is accepted by the host computers 11 to 1n via the task identification unit 3 and the host interface unit 2. Then, it is notified that it has been permitted (step S6 in FIG. 4).

The host computers 11 to 1 that have received the notification
0 can use the shared resource 10 according to the permission. Thereafter, if the processing is completed (step S7 in FIG. 4), the exclusive control processing device 1 ends the processing, and if not (step S7 in FIG. 4), the processing returns to step S1.

On the other hand, if the real task processing unit 4 determines that the requested resource is not usable, the real task processing unit 4 adds the lock request to the queue of the requested resource via the task hash table 61 of the lock management table 6 (step in FIG. 4). S8), returning to step S1.

When the task identification unit 3 identifies that the lock request is not a lock request by a real task, it identifies whether the lock request is a lock request by a virtual task (step S12 in FIG. 6).

When the task identification unit 3 identifies that the lock request is a lock request by a virtual task, it notifies the virtual task processing unit 5 that the lock request is identified as a lock request by a virtual task (step S13 in FIG. 6).

When the virtual task processing unit 5 receives the notification from the task identification unit 3, the virtual task processing unit 5 refers to the lock management table 6 (step S14 in FIG. 6) and determines whether the requested resource is available (step S15 in FIG. 6). ).

When the virtual task processing unit 5 determines that the requested resource is available, the virtual task processing unit 5 permits the lock request, and the lock request is accepted by the host computers 11 to 1n via the task identification unit 3 and the host interface unit 2. Then, it is notified that it has been permitted (step S16 in FIG. 6).

The host computers 11 to 1 that have received the notification
0 can use the shared resource 10 according to the permission. Thereafter, if the processing is completed (step S17 in FIG. 6), the exclusive control processing device 1 ends the processing. If not (step S17 in FIG. 6), the exclusive control processing device 1 proceeds to step S1.
Return to

On the other hand, if the virtual task processing section 5 determines that the requested resource is not usable, the virtual task processing section 5 adds the lock request to the request resource queue via the virtual task hash table 62 of the lock management table 6 (FIG. 6). Step S1
8) Return to step S1.

On the other hand, a plurality of host computers 1
When the resource use end notification is transferred from the host computer 1 to 1n through the host interface unit 2 (step S9 in FIG. 5),
When the task identification unit 3 identifies that the notification is based on the real task, the task identification unit 3 sends the notification to the lock management table 6 via the real task processing unit 4. The data is sent to the lock management table 6 via the task processing unit 5.

In the lock management table 6, if the task entry at the head of the queue corresponding to the shared resource 10 notified by the resource use end notification is based on the task hash table 61, the real task processing unit 4 sends the task identification unit 3 And notifies the host computers 11 to 1n via the host interface unit 2 that the lock request at the head of the queue has been accepted and granted, and the task entry at the head of the queue corresponding to the shared resource 10 has a virtual task hash. If it is based on the table 62, the virtual task processing unit 5
Notifies the host computers 11 to 1n via the task identification unit 3 and the host interface unit 2 that the lock request at the head of the queue has been accepted and permitted (step S10 in FIG. 5).

Host computers 11 to 1 that have received the notification
0 can use the shared resource 10 according to the permission. Thereafter, if the processing is completed (step S11 in FIG. 5), the exclusive control processing device 1 ends the processing. If not (step S11 in FIG. 5), the exclusive control processing device 1 proceeds to step S1.
Return to

That is, normally, even when a plurality of different real tasks in the same host computer 11 to 1n request the shared lock of the same shared resource 10,
If only the lock request of the shared resource 10 by the real task can be managed, communication with the exclusive control processing device 1 is required a plurality of times. However, when a plurality of different real tasks in the same host computer 11 to 1n are shared locks of the same shared resource 10 as in the exclusive control processing device 1 described above, they are grouped together and virtually By having the required virtual task management function, communication with the exclusive control processing device 1 can be realized at one time.

The exclusive control processing device 1 includes the task identification unit 3 and the virtual task processing unit 5, so that lock requests for the same shared resource 10 from different real tasks of the same host computers 11 to 1 n can be virtualized by these functions. Tasks can be requested at once.

FIG. 7 is a block diagram showing the configuration of an exclusive control processing device according to another embodiment of the present invention. In the figure,
The exclusive control processing device 7 according to another embodiment of the present invention has the same configuration as that of the embodiment of the present invention except that it has an attention management unit 8 that monitors the lock management table 6.
The same components are denoted by the same reference numerals. The operation of the same component is the same as that of the embodiment of the present invention.

The attention management unit 8 monitors the lock management table 6, and when a lock request from another host computer to the shared resource 10 locked by the virtual task becomes an exclusive wait, the lock by the virtual task is used. Attention is generated to request the host computer requesting the request to unlock the shared resource 10.

After the occurrence of the attention, if the exclusive weight causing the attention request is eliminated, the attention management unit 8 generates an attention for canceling the previous unlock request.

This is intended to request that a part of the shared resource 10 be temporarily released when the shared resource 10 is locked by the virtual task. If there is no problem, you will be notified.

Further, when the use of the shared resource of another host computer ends, an attention is generated to cancel the previous unlock request as described above, so that a further virtual lock request can be reduced. Effective use of the shared resource 10 becomes possible.

FIG. 8 is a sequence chart showing the operation of the attention management unit 8 of the exclusive control processing device 7 of FIG. In this figure, when lock control is performed using the virtual lock function, it is possible to prevent a lock request from one virtual task from occupying the shared resource 10 for a long time, thereby preventing the processing of another host computer from being interrupted. For example, an unlock request attention and an unlock unnecessary attention output from the attention management unit 8 are shown.

An actual task 41 is sent from a certain host computer.
When the lock request for the shared resource 10 by the real task 45 is issued from another host computer to the same shared resource 10 by the real task 45, the lock request by the real task 45 is locked. Although the request is locked, the lock request is released by the unlock attention 46 to the host computer requesting the lock by the virtual task by the unlock request attention function of the exclusive control processing device 7. Request.

The host computer issuing the lock request by the virtual task can release the lock 47 on the shared resource 10 if the lock can be released. When the lock on the shared resource 10 is released, the real task 4
The lock request by No. 5 is changed from the lock wait to the lock state.

Further, the unlock request 46 issued by the lock request by the task 45 is accepted by the host computer making the lock request by the virtual task,
If the lock request by the task 45 is canceled before the lock is released, by notifying the unlock unnecessary attention 48, the host computer which has issued the lock request by the virtual task cancels the lock request by the virtual task. It is not necessary to carry out.

As described above, in the task management, apart from the lock management of the shared resource 10 by the real tasks in the respective host computers 11 to 1n, different real tasks in the same host computer 11 to 1n are the same. When a lock request is made by a virtual task representing the host computers 11 to 1n without requesting the shared lock of the shared resource 10 by the real task, a lock request from the host computers 11 to 1n is issued. Is identified by the task identification unit 3 at least by a task name or a command, and the lock request by the real task and the lock request by the virtual task are input to the lock management table 6, respectively. Stored in order and managed separately, the task identification unit 3 When the lock request is identified as a lock request by the virtual task, the lock request is managed by the virtual task processing unit 5, so that the number of accesses between the host computers 11 to 1n and the exclusive control processing devices 1 and 7 can be reduced, 10 can be used with high efficiency.

That is, the same host computers 11-
Even when a plurality of different tasks within 1n request the shared lock of the same shared resource 10, the processing overhead can be reduced, and the performance of the exclusive control function can be greatly improved.

The present invention can further take the following aspects in connection with the description of the claims.

(1) A virtual lock task type exclusive control processing device of a parallel processing system in which a plurality of host computers mutually acquire a right to use a shared resource and use the shared resource, wherein the plurality of host computers When a plurality of different real processes in the same host computer request a shared lock of the same shared resource, the lock is provided separately from the lock management of the shared resource by the real processing unit in the computer. A task identification unit for identifying whether the lock request source is the real process or the virtual task when a request is made by a virtual task representing the host computer without making a request, and a lock request by the real process. A lock management table for storing lock requests by the virtual task in the order of input and managing them separately; and Click requester and having a virtual task processing means for locking control of the shared resource for the identified lock request to be the virtual task exclusive control processor.

(2) The lock management table indicates that when the virtual task is simultaneously waiting for exclusion in a plurality of different shared resources, the lock request from the same virtual task to each of the plurality of different shared resources is as if by a different actual processing. The exclusive control processing device according to (1), wherein the exclusive control processing device is configured to be treated as a lock request.

(3) When a lock request is issued from another host computer to the locked shared resource by the lock request by the virtual task, an unlock request is issued to the host computer that has requested the lock request by the virtual task. The exclusive control processing device according to (1) or (2), further comprising an attention management means for notifying and notifying that the unlock request becomes unnecessary when the unlock request becomes unnecessary.

(4) An exclusive control processing method of a virtual lock task system of a parallel processing system in which a plurality of host computers mutually acquire a right to use a shared resource and use the shared resource, wherein When a plurality of different real processes in the same host computer request a shared lock of the same shared resource, the lock is provided separately from the lock management of the shared resource by the real processing unit in the computer. A step of identifying whether the lock request source is the real process or the virtual task when a virtual task representing the host computer makes a request without making a request, a lock request by the real process and the virtual task Accumulating the lock requests according to the input order and managing them separately; and identifying the lock request source to be the virtual task. Exclusive control processing method characterized by a step of performing a lock management of the shared resources to the lock request.

(5) The step of accumulating the lock requests in the input order and separately managing the lock requests includes the step of, when the virtual tasks are simultaneously waiting for exclusion in a plurality of different shared resources, the same virtual task for each of the plurality of different shared resources The exclusive control processing method according to (4), wherein the lock request from the server is treated as a lock request by a different actual processing.

(6) When a lock request is issued from another host computer to a locked shared resource by a lock request by the virtual task, an unlock request is issued to the host computer that has requested the lock request by the virtual task. The exclusive control processing method according to (4) or (5), further comprising a step of notifying and notifying that the unlock request is unnecessary when the unlock request becomes unnecessary.

(7) A storage medium storing a virtual lock task type exclusive control processing program of a parallel processing system in which a plurality of host computers mutually acquire the right to use a shared resource and use the shared resource. The exclusive control processing program locks the shared resource by an actual processing unit in the plurality of host computers, by an exclusive control unit that performs exclusive control of a request to acquire the right to use the shared resource from each of the plurality of host computers. When a plurality of different real processes in the same host computer which are provided separately from the management request a shared lock of the same shared resource, a virtual task representing the host computer without requesting the shared lock in the real process. When the request is made, the lock request source is identified as either the real process or the virtual task. The lock request by the virtual task and the lock request by the virtual task are accumulated in the input order and separately managed, and the lock request of the lock request source is identified as the virtual task, and the lock management of the shared resource is performed. A storage medium storing an exclusive control processing program characterized by the above-mentioned.

(8) The exclusive control processing program causes the exclusive control means to accumulate the lock requests in the order of input and manage them separately. A storage medium storing an exclusive control processing program according to (7), wherein a lock request from the same virtual task to each of the plurality of different shared resources is treated as a lock request by different actual processing.

(9) The exclusive control processing program causes the exclusive control means to lock the shared resource being locked by the virtual task when a lock request is issued from another host computer to the locked shared resource by the lock request by the virtual task. The exclusive control processing program according to (7) or (8), wherein the requesting host computer is notified of the unlock request, and when the unlock request becomes unnecessary, it is notified that the unlock is unnecessary. A storage medium that stores the information.

[0071]

As described above, according to the present invention, in an exclusive control processing apparatus of a parallel processing system including a plurality of host computers and a shared resource commonly used by the plurality of host computers, a plurality of host computers are provided. The request for acquiring the right to use the shared resource from each of them is a request for acquiring the right to use the shared resource by the real task of each of the plurality of host computers, and the request for obtaining the right to use the same shared resource by the real tasks of each of the plurality of host computers. Identifying one of the request to acquire the right to use the shared resource by the virtual task, wherein the acquisition request is sent as one acquisition request;
A request to acquire a right to use a shared resource by a real task and a request to obtain a right to use a shared resource by a virtual task are stored in the order in which they are entered. Manages the request to acquire the right to use the shared resource by the real task based on the request. , The overhead of processing can be reduced even when a plurality of different tasks in the same host computer request a shared lock of the same shared resource, and the performance of the exclusive control function is greatly improved. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an exclusive control processing device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a lock management table of FIG.

FIG. 3 is a block diagram illustrating a configuration example of a parallel processing system according to an embodiment of the present invention.

FIG. 4 is a flowchart illustrating a processing operation of the exclusive control processing device of FIG. 1;

FIG. 5 is a flowchart showing a processing operation of the exclusive control processing device of FIG. 1;

FIG. 6 is a flowchart showing a processing operation of the exclusive control processing device of FIG. 1;

FIG. 7 is a block diagram showing a configuration of an exclusive control processing device according to another embodiment of the present invention.

FIG. 8 is a sequence chart showing an operation of an attention management unit of the exclusive control processing device of FIG. 7;

[Explanation of symbols]

 1, 7 exclusive control processing unit 2 host interface unit 3 task identification unit 4 real task processing unit 5 virtual task processing unit 6 lock management table 8 attention management unit 10 shared resources 11 to 1n host computer 61 task hash table 62 virtual task hash table 63 Resource Hash Table

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G06F 9/46 G06F 15/16 G06F 12/00

Claims (12)

(57) [Claims] An exclusive control processing apparatus for a parallel processing system including a plurality of host computers and a shared resource commonly used by the plurality of host computers, wherein the shared resource is transmitted from each of the plurality of host computers. The request for obtaining the right to use is a request for obtaining the right to use the shared resource by the real task of each of the plurality of host computers, and the request for obtaining the right to use the same shared resource by the plurality of different real tasks of each of the plurality of host computers. Identification means for identifying any one of a request to acquire the right to use the shared resource by the virtual task transmitted as one acquisition request; and a request to acquire the right to use the shared resource by the real task and the virtual A lock management table for accumulating requests to acquire the right to use the shared resource by a task in the order of input; Real task processing means for managing a request to acquire the right to use the shared resource by the real task based on the contents of the lock management table when the request is identified as a request to acquire the right to use the shared resource by the real task; Virtual task processing means for managing a request to acquire the right to use the shared resource by the virtual task based on the contents of the lock management table when the request is identified by the virtual task as a request to acquire the right to use the shared resource; And the virtual
A shared resource for which the use right has been acquired by an acquisition request by a disk
When an acquisition request is issued from another computer
The host computer that has output the acquisition request by the virtual task
Computer to unlock the shared resource temporarily.
Notification of lock request and unlock request is no longer required
An exclusive control processing device, comprising: an attention management unit that sometimes notifies the user that unlocking is unnecessary . 2. The lock management table stores, for each of the shared resources, a request to acquire a right to use the shared resource by the real task and a request to acquire a right to use the shared resource by the virtual task in the order of input. The exclusive control processing device according to claim 1, wherein the exclusive control processing device includes a plurality of queues. 3. The request source of the acquisition request is one of the real task and the virtual task based on at least one of a task name and a command added to the acquisition request. The exclusive control processing device according to claim 1 or 2, wherein the exclusive control processing device is configured to identify the exclusive control processing device. 4. The virtual task processing means stores the acquisition request for each of the plurality of different shared resources in the lock management table when the acquisition request by the virtual task is simultaneously waiting for exclusion for a plurality of different shared resources. The exclusive control processing device according to any one of claims 1 to 3, wherein the exclusive control processing device is configured to perform the following. 5. A host computer comprising : a plurality of host computers;
Shared resources commonly used by other host computers.
An exclusive control processing method for a parallel processing system,
Use of the shared resource from each of a plurality of host computers.
The request for the right to use is sent to each of the plurality of host computers.
A request to acquire the right to use the shared resource by a real task;
Multiple different real tasks for each of multiple host computers
Request to acquire the right to use the same shared resource is one
Of the shared resource by a virtual task sent as a request
A request to obtain a usage right.
And use of the shared resource by the real task
Request and right to use the shared resource by the virtual task
Accumulating the acquisition requests in the order of input.
Identified as a request to obtain the right to use the shared resource by the
When the real task is executed, the
Managing a request to acquire the right to use the shared resource
Acquiring the right to use the shared resource by the virtual task
When identified as a request, based on the accumulated contents of the acquisition request
A request to acquire the right to use the shared resource by the virtual task
Managing and acquiring request by the virtual task
Another computer may be assigned to the shared resource for which the usage right has been acquired.
When an acquisition request from the data
To the host computer that has output the acquisition request
Notification of an unlock request to temporarily release the
Unlock is unnecessary when the unlock request becomes unnecessary
Exclusive control, comprising the steps of:
Processing method. 6. A step for accumulating the acquisition requests in the order of input.
The shared resources by the real task for each of the shared resources.
Request for the right to use the resource and the sharing by the virtual task
A plurality of requests for acquiring the right to use resources are stored in the order of input.
6. The exclusive control processing method according to claim 5, further comprising : 7. The method of claim 1, wherein the step of identifying the acquisition request comprises :
Task name and command added to the acquisition request
The request source of the acquisition request is based on at least one of
Whether the task is a real task or the virtual task
6. The method according to claim 5, wherein
The exclusive control processing method according to claim 6 . 8. The use of the shared resource by the virtual task.
Managing the request to acquire the usage right comprises:
Request for multiple shared resources simultaneously
When waiting for exclusion, each of the plurality of different shared resources is
That each acquisition request is managed.
8. The exclusive control processing method according to claim 5, wherein 9. A computer system comprising : a plurality of host computers;
Shared resources commonly used by other host computers.
The exclusive control processing program of the parallel processing system is stored.
Wherein the exclusive control processing program is
The shared resources from each of the plurality of host computers.
The exclusive control means for performing exclusive control of the use right acquisition request
The shared resources from each of the plurality of host computers.
A request for obtaining a use right is issued to each of the plurality of host computers;
Request for the right to use the shared resource by the real task
A plurality of different real tasks of each of the plurality of host computers
Requests for the right to use the same shared resource
Said shared resource by a virtual task sent as a get request
Request to acquire the right to use
Request for the right to use the shared resource by the real task and before
Request for the right to use the shared resource by the virtual task;
Are stored in the order of input, and the sharing by the real task is performed.
A request for obtaining a right to use the resource when the request is obtained;
Use of the shared resource by the real task based on the accumulated contents of
Management request for the usage right, and the virtual task
Acquired when identified as a request to acquire the right to use shared resources
The shared resources by the virtual task based on the accumulated contents of the request.
Request to acquire the right to use the resource,
To the shared resource for which the use right has been acquired in the acquisition request
When an acquisition request is issued from another computer, the temporary
Computer that outputs the acquisition request by the virtual task
An unlock request requesting temporary release of the shared resource
Notification when the unlock request is no longer needed.
Exclusive control processing characterized by notifying that unlocking is unnecessary
Storage medium storing a processing program. 10. The exclusive control processing program according to claim 1, wherein
When accumulating the acquisition requests in the order of input in other control means
The shared resources by the real task for each of the shared resources
Request for the use right of the virtual task and the shared resource by the virtual task.
Requests to acquire the right to use the source
The method according to claim 9, wherein a queue is used.
A storage medium storing an exclusive control processing program. 11. The exclusive control processing program according to claim 11, wherein
When the other control means identifies the acquisition request,
Of the task name and command added to the acquisition request
The request source of the acquisition request is based on at least one of
Task or the virtual task.
11. The method according to claim 9 or claim 10, wherein
Storage medium storing the exclusive control processing program described above. 12. The exclusive control processing program according to claim 12, wherein
In other control means, the virtual task uses the shared resource.
When managing a request to acquire a usage right, the virtual task
Acquisition requests are mutually exclusive for multiple different shared resources
Waiting for each of the plurality of different shared resources
10. The method according to claim 9, wherein each of the acquisition requests is managed.
The storage medium storing the exclusive control processing program according to any one of al claims 11.