JP2970082B2 - Virtual intercluster communication processor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-virtual cluster communication processing apparatus for controlling a virtual computer system in a computer, and more particularly for performing a control when simulating communication between clusters by a predetermined communication means in the virtual computer system. .

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing an example of the configuration of a computer system. The system comprises a computer having one processor 1 or two or more processors 1 share a main storage device 2. The multi-processor systems are connected as clusters 3 so that the system storage device 4 is shared by the clusters 3.

[0003] In the system storage device 4, each processor 1
Can be accessed with a specific instruction. As one use of the system storage device 4, the system storage device 4 forms a part of a communication means between clusters together with the cluster control device 5.

That is, when a program to be executed in a certain cluster 3 requires communication with another cluster, a message of a predetermined format is stored in a predetermined communication area of the system storage device 4, Execute a specific inter-cluster communication request command.

When the processor 1 executes the inter-cluster communication request command, the processor 1 controls the cluster control device 5 to send a predetermined signal of a communication request to the cluster control device 5 of the other cluster specified by the command.

Therefore, the cluster control device 5 which has received the communication request signal generates a specific interrupt for notifying the communication request to all the processors 1 of the cluster, so that each processor 1 executes a predetermined interrupt processing of the operating system. By executing, communication processing via the communication area is executed.

[0007]

When a virtual machine system is executed on a cluster as described above and there is a virtual cluster having one or more virtual processors under the control of the virtual machine system, another cluster (for example, In the following, when a communication request is issued from a real cluster in order to clarify the distinction from a virtual cluster, a communication request interrupt generated in each processor 1 of the real cluster is reflected on a virtual processor of a predetermined virtual cluster. Need to be done.

For this purpose, for each communication request to the real cluster, control must be performed so as to simulate the occurrence of a communication request interrupt only once for all virtual processors of the requested virtual cluster.

It is an object of the present invention to provide an inter-cluster communication processing apparatus that reliably reflects an inter-cluster communication request on a virtual cluster.

[0010]

FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 1 shows a configuration of a communication processing apparatus 10 between virtual clusters, which has a plurality of real clusters 11, and each real cluster 11 is a tightly coupled multiprocessor system having one or more real processors. A real cluster of a computer system having inter-cluster communication means 12 for performing communication, and generating a predetermined interrupt to notify all the real processors of the real cluster on the receiving side of a communication request for the communication; When performing the simulation of the communication request notification for the virtual processor of the virtual cluster executed by the virtual computer system of 11, the real cluster 11 is provided with a maximum reception number register 13 and an accumulation number register 14, A predetermined initial value is set in the count register 14.

The maximum number-of-receptions register 13 always holds a predetermined judgment value corresponding to the number of the real processors operating in the real cluster 11. When an interruption of the communication request occurs and the communication request destination is the virtual cluster, the value held in the accumulation count register 14 is updated to a predetermined constant value, and the value is held in the accumulation count register 14 before the update. Only when the value is the initial value, a simulation of the communication request notification to the request destination virtual cluster of the communication request is executed.

When the result value has a predetermined relationship with the determination value, the initial value is reset in the cumulative number register 14.

[0013]

In the maximum reception count register 13, for example, the number of processors incorporated in the cluster is set as a judgment value, and if there is a disconnection of the processor due to a failure or the like and subsequent recovery, the judgment value is increased or decreased accordingly. I do. The accumulated number register 14 sets the initial value to 0, for example, and sets +
Do one.

[0014] In this case, the processor that first performed the interrupt processing by the above-described processing executes the communication request notification simulation for the virtual cluster. Thereafter, the processor that performs the interrupt processing ends the processing only by increasing the value of the cumulative number register. The processor that processes last can detect that the value obtained by incrementing the cumulative number of times matches the value of the maximum number-of-receptions register.

As described above, the communication request notification simulation for the virtual cluster is performed only once irrespective of the number of real processors, and after all the real processors have processed, the cumulative number register is returned to the initial state. hand,
It is possible to cope with the processing of the subsequent communication request interrupt.

[0016]

2 to 4 are diagrams for explaining the processing according to the present invention by way of an example of a configuration, in which three real processors a,
A computer system having a real cluster A having b and c and another real cluster B, wherein one virtual computer system is executed by a real processor of the real cluster A, and a virtual cluster having three virtual processors under its control Has been simulated.

According to the present invention, a program added to a virtual machine system and implementing a virtual intercluster communication processing device has a maximum reception count register and an accumulation count register, and the maximum reception count register indicates the number of real processors. The value is set as a judgment value, and the accumulated number register is initialized to 0 (the value held in each register is indicated by a number in parentheses in the figure).

For example, when a specific real processor is started in a well-known manner at the time of initial program loading of the real cluster, the number of real processors sequentially starts other real processors, and the number of real processors confirmed to be normal Is recorded, so that it can be obtained from the record.

Thereafter, in accordance with disconnection due to a failure or the like, or recovery from the disconnection state, etc., the judgment value is updated each time the set value of the maximum reception count register matches the actual number of actual processors.

Here, when a communication request is issued from the real cluster B to the virtual cluster of the real cluster A, an interrupt is generated in all the real processors of the real cluster A as in the above-described conventional case. In the case of an interruption of a communication request, serialization is performed so that subsequent processes are sequentially performed one processor at a time by, for example, appropriate exclusive control.

In this way, each of the real processors selected by the exclusive control proceeds, for example, according to the processing flow shown in FIG. That is, the value of the accumulation count register is incremented by 1 in the processing step 20, and whether the value is "1" is identified in the processing step 21.

If the cumulative number register is 1, the processing is simulated so that the communication request interrupt is generated in all the virtual processors of the virtual cluster so that the communication request interrupt is reflected in the virtual cluster in the processing step 22. Ends. FIG. 2 shows a state where, for example, the real processor a has advanced the above processing.

In the case of the real processor after the second time, since it is detected in the processing step 21 that the accumulated number register is not 1, the flow goes to the processing step 23 and the value of the accumulated number register and the value of the maximum received number register are read. Value and compare
If the two are not equal, the process ends. FIG.
An example of a state in which the real processor b enters the processing second and ends the processing only by increasing the cumulative number register as described above.

If the value of the accumulation number register matches the value of the maximum reception number register in processing step 23, it indicates that all of the real processors have completed the interrupt processing. Change the value back to 0. FIG. 4 is a diagram illustrating an example of this state.

In the above description, the judgment value set in the maximum reception count register is set equal to the number of actual processors, but is set to a value one less than the actual processor count, and the judgment of the count is performed before updating the accumulation count register. It is possible to change the set values of both registers and the processing of the values so as to have the same effect as described above.

[0026]

As apparent from the above description, according to the present invention, in controlling a virtual machine system in a computer, there is a remarkable industrial effect that an inter-cluster communication request can be reliably reflected on a virtual cluster. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of the present invention.

FIG. 2 is a diagram for explaining the processing of the present invention (part 1)

FIG. 3 is a view for explaining processing of the present invention (part 2);

FIG. 4 is a view for explaining processing of the present invention (part 3);

FIG. 5 is a flowchart of the process of the present invention.

FIG. 6 is a block diagram showing a configuration example of a computer system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processor 2 Main storage device 3 Cluster 4 System storage device 5 Cluster control device 10 Inter-cluster communication processing device 11 Real cluster 12 Communication means 13 Maximum reception count register 14 Cumulative count register 20 to 24 Processing steps

Claims (1)

(57) [Claims] An inter-cluster communication means (1) having a plurality of real clusters (11), each of which is a tightly-coupled multiprocessor system having one or more real processors; 12), the communication request of the communication is generated by notifying all the real processors of the real cluster on the receiving side by generating a predetermined interrupt, and the virtual computer system of the real cluster When simulating the communication request notification for the virtual processor of the virtual cluster to be executed, the real cluster is provided with a maximum reception count register (13) and an accumulation count register (14), A predetermined initial value is set in the register (14), and the maximum reception count register (13) is set in the real cluster (11).
In the case where a predetermined judgment value corresponding to the number of the real processors operating at the time is held, and an interruption of the communication request occurs, and the communication request destination is the virtual cluster, the cumulative number register ( 14) updates the value held by the communication request to the requested virtual cluster only when the value held in the cumulative number register (14) before the update is the initial value. The simulation of the notification is performed, and when the result value has a predetermined relationship with the determination value, the initial value is reset in the cumulative number register (14). Virtual cluster inter-cluster communication processing device.