JPH087731B2 - Communication processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a communication processing system for multi-processor communication between processors. In particular, the present invention relates to a communication processing method in which a queue management unit creates a queue on a memory when one processor communicates with another processor, and a transfer control unit refers to the queue on the memory to transfer information. It is a thing.

[0002]

2. Description of the Related Art Conventionally, according to a communication processing method, a queue and its control block are generated by a queue management means on an arbitrary memory, but the transfer control means cannot directly access them. The queue management means copies its control block onto a fixed memory address (often defined as a ring memory) accessible by both the queue management means and the transfer control means,
Both the queue management means and the transfer control means were controlled by the pointers respectively owned by them.

[0003]

However, in such a conventional communication processing system, the queue management means needs a copy operation from an arbitrary memory address to a fixed memory address at the start and end of the process. There was a problem that management was complicated and time-consuming. In addition, there is a problem in that it is not possible to generate a queue of more than the prepared area on the fixed memory.

Further, in the communication processing method in which the transfer control means refers to the queue on the memory generated by the queue management means and transfers information, when the control block in the queue is the last, the transfer processing is performed. Is completed and the end status is reported in the transfer status report, the queue management means hands over the control block to another application, which may cause the transfer control means to destroy the contents in the memory. There was a problem.

In the transmission waiting queue control method, when reading the transmission data from the transmission waiting queue, the transmission data accumulated in the transmission waiting queue is designated by the number of transmission data counted from the head of the transmission waiting queue, There is a proposal to make it possible to read any transmission data other than the head of the transmission waiting queue from the transmission waiting queue so that there is only one transmission waiting queue and to shorten the processing time to retrieve the transmission data from the transmission waiting queue. (JP-A-6
3-268331). Also, in the queue control storage device, the address reference of the data block registered at the specific position of the queue, the registration from the queue, the removal from the queue, the insertion into the specific position of the queue, the deletion from the queue Although there is a proposal that the writing or reading processing for the register is realized by hardware to speed up the processing (Japanese Patent Laid-Open No. 58-189743), both of them need to be copied to a fixed memory address and are prepared on the fixed memory. Queue cannot be created more than the area.

The present invention solves the above-mentioned problems.
The control block can be registered in the queue without being limited to the area prepared on the fixed memory address,
An object of the present invention is to provide a communication processing method capable of passing information to an application program without copying it to another memory address.

[0007]

According to the present invention, there is provided a communication control device for interconnecting one processor and a plurality of multi-connected processors to perform inter-processor communication, wherein the communication control device is a queue management. Means, a memory for temporarily storing the data in the queue, and a transfer control means for writing and reading the memory independently of the control of the queue management means, wherein the queue management means comprises: For each queue, set a control block that holds chain information indicating the address of the queue to be transferred next, the start address of the transfer information, and the transfer status report in which the response from the partner device is written. In a communication processing method including means for notifying an address to the transfer control means,
The transfer control means includes means for setting a control block deletion prohibition flag to the control block being accessed, and the queue management means has this prohibition flag even if a condition for deleting the setting of the control block is satisfied. The space includes means for maintaining the set state of the control block.

Further, according to the present invention, the transfer control means may include control means for setting the flag when there is no chain information of the control block to be accessed.

Further, according to the present invention, the queue management means may include means for delivering the control block to another queue and setting the control block when the information indicating that the transfer is completed is detected from the transfer status report. it can.

Further, the present invention, the transfer control means, Chi
Information disappears and the control block deletion prohibition flag is set.
Means for clearing the control block deletion prohibition flag when the chain information is added after the chain information has been added .

[0011]

The queue management means creates a queue of control blocks of transfer information on the memory, and the transfer control means sets a control block deletion prohibition flag when there is no chain information of the control block to be accessed. The queue management means maintains the setting state of the control block while the prohibit flag is present even if the condition for deleting the setting of the control block is satisfied. As a result, the control block can be registered in the queue without being limited to the area prepared on the fixed memory address, and the information can be transferred to the application program without copying to another memory address.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a communication processing system according to an embodiment of the present invention. FIG. 2 is a block diagram of inter-processor communication to which the communication processing method of the present invention is applied. FIG.
FIG. 6 is a diagram showing the contents of a queue of the communication processing system of the present invention.

1 to 3, the communication processing system is a communication control device 31 (in the input / output interface unit 30) that connects one processor 20 and a plurality of multi-connected processors 20 to each other to perform inter-processor communication. included)
The communication control device 31 includes a queue management unit 33.
And a memory 35 for temporarily storing the data in the queue
Queue management means 3 for writing and reading in the memory 35
3, the queue management means 33 includes, for each queue, the chain information 11 ₁ , 11 ₂ , which indicates the address of the queue to be next transferred,
A control block holding the transfer information start memory addresses 12 ₁ and 12 ₂ and the transfer status reports 13 ₁ and 13 _{2 in} which the response from the partner device is written as the start address of the transfer information is set and controlled as the start address of the control block. It includes means for notifying the transfer start means 34 of the block head memory address 1.

A feature of the present invention is that the transfer control means 34 includes means for setting control block deletion prohibition flags 14 ₁ and 14 ₂ in the control block being accessed, and the queue management means 33 includes: Even if the condition for deleting the setting of the control block is satisfied, a means for maintaining the setting state of the control block is included while the prohibition flag is present.

Further, the transfer control means 34 includes control means for setting the flag when the chain information 11 ₁ and 11 _{2 of the} control block to be accessed runs out.

Further, the queue management means 33 includes means for handing over the control block to another queue and setting it when the information indicating that the transfer is completed is detected from the transfer status reports 13 ₁ and 13 ₂ .

Further, the transfer control means 34 includes the control block.
Chain information 1 after setting the check flag
And means for clearing the control block deletion prohibition flags 14 ₁ and 14 ₂ when 1 ₁ and 11 ₂ are added .

The operation of the communication processing system having such a configuration will be described.

The queue and control block generated by the queue management means 33 are created in an arbitrary memory. The queue management means 33 first notifies the transfer control means 34 of the control block head memory address 1 in which the control block is stored.

The transfer control means 34 analyzes the control block from the control block head memory address 1 and transfers the transfer information head memory address 12 in which the queue information is stored.
_1. Transfers spontaneously based on ₁ , monitors the transfer status, and reports the response from the partner processor 20 to the transfer status report 1 of the control block.
Write to 3 ₁ . Further, the address of the control block to be transferred next is obtained from the analyzed chain information 11 ₁ and the transfer is continued.

The queue management means 33 pays attention only to the transfer status reports 13 ₁ and 13 _{2 in} the control block of the queue,
For example, if nothing is written there, it can be seen that the transfer is not completed, and that the control block cannot be deleted from the queue. Here, it is assumed that the deleted control block is handed over to the queue of another application and registered as it is.

The queue management means 33 is executed by the above processing.
Can be registered infinitely without copying to another memory address and because the queue is software controlled.

When the transfer control means 34 determines that the control block in the queue is the last on the memory 35, the transfer control means 34 causes the control block deletion prohibition flags 14 ₁ , 14 _2.
Set a bit on. The queue management means 33 pays attention to the transfer report statuses 13 ₁ and 13 ₂ and the control block deletion prohibition flags 14 ₁ and 14 ₂ in the control blocks of the queue, and writes in the transfer status reports 13 ₁ and 13 ₂ , for example. If it is not, it can be seen that the transfer has not ended, and that the control block cannot be deleted from the queue. The transfer control means 34 uses the control block deletion prohibition flag 14 ₁ ,
After setting 14 ₂ , the control block is continuously monitored, and when the software finds that the control block has been queued, the hardware causes the control block deletion prohibition flag 14 ₁ ,
I'm going to drop 14 ₂ . That is, chain information 1
When you know that 1 ₁ and 11 ₂ have been added, the control block is deleted.
The removal prohibition flags 14 ₁ and 14 ₂ are dropped.

[0025]

As described above, according to the present invention, a control block can be registered in a queue without being limited to an area prepared in a fixed memory address, and a copy can be made in another memory address. There is an excellent effect that information can be passed to the application program without doing so.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a communication processing system according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of an inter-multiprocessor communication system to which the communication processing system of the present invention is applied.

FIG. 3 is a diagram showing the contents of a queue of the communication processing system of the present invention.

FIG. 4 is a flowchart showing the operation of the queue management means of the communication processing system of the present invention.

FIG. 5 is a flowchart showing the operation of the transfer control means of the communication processing system of the present invention.

[Explanation of symbols]

1 control block top memory address 11 ₁ , 11 ₂ chain information 12 ₁ , 12 ₂ transfer information top memory address 13 ₁ , 13 ₂ transfer status report 14 ₁ , 14 ₂ control block deletion prohibition flag 15 ₁ , 15 ₂ data block 20 processor 30 I / O interface unit 31 Communication control device 32 Queue control means 33 Queue management means 34 Transfer control means 35 Memory

Claims (4)

[Claims] 1. A communication control device for interconnecting one processor and a plurality of multi-connected processors to perform inter-processor communication, wherein the communication control device comprises queue management means and data in the queue. Are temporarily stored, and transfer control means for writing and reading the memory independently of the control of the queue management means. The queue management means transfers the queues next to each other. A control block for holding chain information indicating the address of the queue to be transferred, the start address of the transfer information, and the transfer status report in which the response from the partner device is written is set, and the start address of the control block is notified to the transfer control means. In the communication processing method including means, the transfer control means sets a control block deletion prohibition flag to the control block being accessed. The communication processing method is characterized in that the queue management means includes means for maintaining the setting state of the control block while the prohibit flag is present even if the condition for deleting the setting of the control block is satisfied. . 2. The communication processing method according to claim 1, wherein the transfer control means includes control means for setting the flag when there is no chain information of the control block to be accessed. 3. The communication according to claim 1, wherein said queue management means includes means for handing over and setting this control block to another queue when detecting information indicating that the transfer is completed by said transfer status report. Processing method. 4. The transfer control means is the control block.
When the chain information is added after setting the deletion prohibition flag
The communication processing method according to claim 2 further comprising a means for dropping the control block deletion prohibition flag can.