JPH02105252A - Lock processing system - Google Patents

Abstract

PURPOSE:To reduce the amount of data for lock by holding not only the lock of a processor connected to the present device but also the lock of the processor connected to another connected system controller, and discriminating the lock. CONSTITUTION:When the request of the lock arrives at the present system 10, the discrimination of the lock is performed at a present system lock judging circuit 10-8 from lock designation 10-2, a lock byte 10-6 to hold the lock information of the present system, and another system lock information 10-7 to hold the lock information of another system. When the system succeeds in locking, lock data 10-1 is written on the byte 10-6 according to the lock designation 10-2. To affect the lock request of the processor connected to the another system 11 on the present system, the lock designation 11-2 of the another system 11 is sent to the present system 10, and it is received by another lock designation 10-3. The discrimination of the lock in the another system can be performed at an another system lock discrimination circuit 10-9 from the byte 10-6, the information 10-7, and the designation 10-3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system control device having a lock function that is connected to a plurality of processing devices, and in particular, a lock processing method when a plurality of system control devices are connected. Regarding.

[Prior Art] Conventionally, this type of lock processing method has been configured such that all necessary information is transmitted between mutually connected system control devices each time lock processing is performed.

Hereinafter, a conventional lock processing method will be explained with reference to FIG. In the case of lock processing in the first system control device 40, the lock processing is instructed by the lock data 41 and the lock designation 42, and the lock determination circuit 44 determines the lock based on the lock designation 42 and the lock byte 43.

In order to reflect the second system control device 50, the lock byte 53 of the system control device 50, the lock specification 5
2 is transmitted to the system control device 40, controlled by the lock coincidence control circuit 45, and reflected in the lock processing in the system control device 40.

However, it takes time to transmit the data from the system control device 50 to the lock coincidence control circuit 45, and the data may be transmitted as data that does not match the data such as the lock byte 53, so the lock coincidence control circuit 45 performs control to avoid this.

[Problems to be Solved by the Invention] In the conventional lock processing method described above, each system control device only holds lock information for each connected processing device, and only one of them can grasp the entire lock status. Therefore, the lock state must be transmitted to the other device each time a lock is generated, which has the drawback of increasing the size of the hardware required for the transmission. Furthermore, in order to perform lock processing, all lock bytes of each system control device are checked, which is time consuming and complicated to control. Furthermore, since it takes time to transmit the lock state between devices, there is a possibility that the transmitted lock information and the lock information of the transmission destination do not necessarily match, so locking cannot be performed continuously. had.

[Means for Solving the Problems] A lock processing method according to the present invention includes a plurality of system control devices connected to a complex processing device and having a locking function for performing exclusive control, and each of the system control devices between a first lock information holding means that holds lock information of a processing device connected to the own system control device as first lock information, and another system control device connected to the own system control device, In an information processing apparatus having means for mutually transmitting lock information of processing apparatuses connected to each system control apparatus, each of the system control apparatuses transmits lock information of processing apparatuses connected to other system control apparatuses. The second lock information holding means holds a copy of the second lock information as the second lock information, and the second lock information holding means holds a copy of the first section 1 as second lock information, and means performs respective lock processing based on the lock information of the previous section 1 and the second lock information.

[Example] Next, the present invention will be explained with reference to the drawings.

Figure 2 shows the system control device 10.11 and the input/output device (
IOP) 25, 26, 35.36 and arithmetic processing unit (E
This is a multiprocessor device configuration in which PU) 23, 24, 33.34 are connected, and input/output devices 25, 26, 35.
36 and the processing unit 23, 24, 33, 34 have requested locking, and the system control unit 10.11 receives the request and performs the locking process.

As a lock processing method, system controller 10.11
A connected processing bag! 23.24゜25.26,33
．． The lock requests of 34, 35, and 36 are transmitted to each other, and each lock is determined and lock information is held.

FIG. 1 is a block diagram of system controllers 10 and 11 connected to each other. The description will be focused on the own system, with the system control device 10 as the own system and the system control device 11 as the other system.

When a lock request comes from the processing device to the local system 10, the lock specification 10-2, the lock byte 10-6 that holds the lock information of the local system, and the other system lock information 10-7 that holds the lock information of the other system are used. , the lock is determined by the own system lock determination circuit 10-8.

If the lock is successful, lock data 10-1 is written to lock byte 10-6 according to lock specification 10-2.

A lock request from a processing device connected to the other system 11 is processed by the other system, but in order to be reflected in the own system, the lock specification 11-2 of the other system 11 is sent to the own system 10, and the lock request from the processing device connected to the other system 11 is sent to the own system 10.
Received with other system lock specification 10-3 in 0. Lock byte 10-6, other system lock information 10-7, and other system lock specification 1
From 0-3 onwards, the other system lock determination circuit 10-9 determines whether the other system is locked. When the lock is successful, data created by the other-system lock data creation circuit 10-5 from the other-system lock information 10-7 and the other-system lock designation 10-3 is written into the other-system lock information 10-7.

When the processing device connected to the own system 10 requests unlocking, the lock data 10-1 is released according to the lock specification 10-2.
is written to lock byte 10-6.

When the other system 11 requests unlocking, it sends data in the same way as locking, and the own system 10 sends the other system lock specification 10-3.
The data created by the other-system lock data creation circuit 10-5 from the other-system lock information 10-7 is converted into the other-system lock information 10-.
Write to 7.

If there is a lock request from the own system and another system at the same time, the conflict determination circuit 10-4 makes a determination based on the lock specification 10-2 and the other system lock specification 10-3, and if it is determined that the lock request is from the same system, it is determined as a conflict. It determines which locks are prioritized, the own system and other systems, and those that are not prioritized are considered unsuccessful locks. As a means of prioritizing the second, flip-flop (
(not shown), the flip-flops are reversed so that the priorities of the own system and the other system are switched each time a conflict occurs as a mark of priority.

If there is no conflict, the locks of the local system and other systems are determined separately.

When lock and unlock requests are made simultaneously on the local system and on the other system, if a conflict occurs, the lock is deemed unsuccessful and the unlock process is performed. If there is no conflict, each process is performed.

[Effects of the Invention] As explained above, the present invention allows each system control device to lock not only the processing device connected to itself but also the processing devices connected to other connected system control devices. By holding and determining locks there, less data is communicated for locks, and less hardware is required for the transfer. Furthermore, the lock status of the entire system can be confirmed by checking the second system control device, so confirmation can be made quickly and control is simple. In addition, the held lock information is always up-to-date because there is no time for transfer, etc., and continuous locking is possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a lock processing method according to an embodiment of the present invention, FIG. 2 is a block diagram of an information processing system to which the present invention is applied, and FIG. 3 is a block diagram showing the configuration of a conventional lock processing method. FIG. 10.11...System control device, 10-1゜11-
1...Lock data, 10-2.11-2...Lock specification, 10-3.11-3...Other system lock specification, 1
0-4.11-4...Conflict determination circuit, 10-5.11
-5...Other system lock data creation circuit, 10-6.11
-6...Lock byte, 10-7゜11-7...Other system lock information, 10-8.11-8...Self system lock determination circuit, 10-9.11-9...Others System lock determination circuit. Figure 2: jυ

Claims (1)

[Claims] 1. A plurality of system control devices are connected to a plurality of processing devices and have a locking function for exclusive control, and each of the system control devices is connected to its own system control device. between a first lock information holding means that holds lock information of the processing device that has been acquired as first lock information, and another system control device connected to the own system control device;
In an information processing device having means for mutually transmitting lock information of processing devices connected to each system control device, each of the system control devices transmits lock information of processing devices connected to other system control devices. the second holding a copy of
A lock processing method comprising: a lock information holding means; and a means for performing respective lock processing based on the first lock information and the second lock information.