JPH0497463A - Real memory refilling system for message buffer - Google Patents

Abstract

PURPOSE:To evade temporary communication infeasibility by monitoring the working status of a message buffer at a constant cycle, and refilling real memory fitting in the number of increment when the number of message buffers in use in remarkably increased. CONSTITUTION:A message buffer monitoring start-up part 1 starts up a message buffer monitoring part 2 at the constant cycle by a timer. Meanwhile, a message buffer securing and releasing part 3 updates the number of message buffers in use of the message buffer use number managing table 7 of a message buffer working status managing part 6 corresponding to the securing and releasing request of the message buffer from the user of the message buffer. The number of increment of the number of message buffers in use by start-up this time for that of the message buffers in use saved in a message buffer use number saving area 5 in the start-up last time is found at the message buffer monitoring part 2, and the real memory fitting in the number of increment is refilled at the message buffer securing and releasing part 3, and it is allocated to the message buffer. Thereby, it is possible to evade the temporary communication infeasibility.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a real memory replenishment system for message buffers in communication control systems.

[Conventional technology]

In the conventional real memory replenishment method for message buffers, the real memory replenishment ratio, which is the message buffer usage rate that triggers replenishment of real memory, is specified, and when the message buffer usage status is monitored at regular intervals, the actual memory replenishment ratio is specified. When the message buffer usage rate, which is the ratio of the number of message buffers in use to the number of message buffers for which memory has been allocated, exceeds a specified real memory replenishment ratio, real memory is replenished one page at a time.

[Problem to be solved by the invention]

The conventional real memory replenishment method for message buffers described above replenishes real memory one page at a time at regular intervals only when the message buffer usage rate exceeds the specified real memory replenishment ratio when the communication load increases. ,
There is a problem in that if the message buffer usage rate increases rapidly in a short period of time, real memory cannot be replenished in time.

For this reason, the conventional method for replenishing real memory for message buffers is such that when the communication load on the communication control system increases rapidly, the real memory for the message buffer, 7. This has the disadvantage that communications may become temporarily unavailable because the allocation of information is not done in time.

[Means to solve the problem]

The real memory replenishment method for a message buffer of the present invention is a communication control system that uses a message buffer for storing communication messages and has a load control function that allocates real memory to the message buffer according to the usage status of the message buffer. A real memory replenishment method for a message buffer includes: a message buffer monitoring section that monitors the usage status of the message buffer; a message buffer monitoring activation section that starts the message buffer monitoring section at regular intervals using a timer; A message buffer securing/releasing unit that secures and releases message buffers in response to requests from users, the number of message buffers in use, the number of message buffers that have allocated real memory, and the actual memory that triggers the replenishment and return of real memory. a message buffer usage management unit that manages the ratio of the number of message buffers in use to the number of message buffers that have been allocated to memory; Calculate the increase in the number of message buffers used at this startup from the number of message buffers used that was saved in the message buffer usage number save area, and use the message buffer securing/release section to match the increase. It consists of replenishing real memory and allocating it to the message buffer.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a real memory replenishment method for a message buffer according to the present invention.

As shown in FIG. 1, the message buffer monitoring starting section 1
starts the message buffer monitoring section 2 at regular intervals using a timer.

On the other hand, the message buffer reservation/release unit 3 updates the message buffer usage number in the message buffer usage number management table 7 of the message buffer usage status management unit 6 in response to a message buffer reservation and release request from a message buffer user. Update.

In addition, the message buffer monitoring unit 2 also checks the number of message buffers per page (4), the previous number of message buffers used in the message buffer usage number save area 5 that was saved at the previous startup, and the messages in the message buffer usage number management table 7. Based on the current number of bus buffers in use, the number of message buffers that have been allocated in real memory, the number of message buffers that have been allocated in real memory in 7 sage buffer number management table 8, and the real memory replenishment ratio in real memory replenishment/return ratio 9, Replenish real memory by calculating the number of pages of memory.

Then, the message buffer monitoring unit 2 updates the message buffer usage number save area 5 and the real memory allocated message buffer number management table 8.

FIG. 2 is a flowchart showing an example of the processing of the message buffer monitoring section 2 of this embodiment.

The message buffer monitoring unit 2, as shown in FIG.
When started by the message buffer monitoring starting unit 1, in step 21, the current number of message buffers in use (A) in the message buffer usage number management table 7 and the number of message buffers in use save area 5 saved at the time of the previous startup.
The number of increases in message buffer usage (C), which is the difference between the number of message buffers used last time (B), is calculated.

Assuming that there is no change in the future increase in the number of message buffers used (C), the next time the message buffer monitoring unit 2 is activated from the message buffer monitoring activation unit 1, the current number of message buffers used (A) + message buffer Since message buffers for the number of increased usage (C) are required, the number of message buffers currently used (A) + the increased number of message buffer usage (C) - real memory has been allocated and the number of message buffers for the number of message buffers (D) is now available. , there will be a shortage by the next time.

Therefore, in step 22, the above calculation is performed to determine the number of insufficient message buffers (E).

Next, in judgment step 23, it is judged whether the number of insufficient message buffers (E) is positive or not. If it is positive, control is passed to step 24 to calculate the number of real memory pages to be replenished; In this case, the ratio of the number of message buffers currently in use (A) to the number of message buffers that have been allocated (D) is the real memory replenishment ratio (Q).
Control is passed to step 25 where it is determined whether or not the value exceeds .

In step 24, the number of missing message buffers (E) until the next time is calculated as the number of message buffers per page 4 (F).
) and add 1 to find the number of real memory pages (P) to be replenished, and in step 27, processing is performed to replenish P pages of real memory and allocate it to the message buffer.

On the other hand, in judgment step 25, as in the conventional process, the usage state of the message buffer is determined by the real memory replenishment ratio (Q).
Determine whether it exceeds the limit, and if it does,
In steps 26 and 27, one page of real memory is replenished.

After replenishing the real memory and allocating the real memory to the message buffer in step 27, in step 28,
The number of real memory allocated message buffers (D) in the real memory allocated message buffer number management table 8 is updated.

Finally, in step 29, in either case, the current message buffer usage number (A) is saved in the message buffer usage number (B) in the message buffer usage number save area 5 in the message buffer usage number save area 5, and the message buffer monitoring unit 2 Finish processing.

〔Effect of the invention〕

As explained above, the real memory replenishment method for message buffers of the present invention monitors the usage status of message buffers at regular intervals, and when the number of message buffers in use increases rapidly, the real memory replenishment method for message buffers according to the present invention By replenishing real memory, even if the communication load suddenly increases in the communication control system, the risk of temporary communication failure due to not being able to allocate real memory to the message buffer in time is greatly reduced. have.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a real memory replenishment method for a message buffer according to the present invention, and FIG. 2 is a flowchart showing an example of the processing of the message buffer monitoring section 2 of this embodiment. 1... Message buffer monitoring startup section, 2... Message buffer monitoring section, 3... Message buffer securing/release section, 4... Number of message buffers per page, 5... Number of message buffers used Evacuation area, 6.
... Message buffer usage status management section, 7... Message buffer usage number management table, 8... Real memory allocation has been completed, message buffer number control Fl y-pull, 9
...Actual memory replenishment/return ratio.

Claims (1)

[Claims] Using a message buffer for storing communication messages,
In a real memory replenishment method for a message buffer of a communication control system having a load control function that allocates real memory to a message buffer according to the usage status of the message buffer, a message buffer monitoring unit that monitors the usage status of the message buffer; a message buffer monitoring activation unit that activates the message buffer monitoring unit at regular intervals using a timer; a message buffer securing/releasing unit that secures and releases message buffers in response to requests from message buffer users; a message buffer usage status management unit that manages the number of buffers in use, the number of message buffers with real memory allocated, and the ratio of the number of message buffers in use to the number of message buffers with real memory allocated, which is a trigger for replenishing and returning real memory; At the same time, while monitoring with a timer at regular intervals, the message buffer monitoring unit calculates the number of message buffers used at the current startup, based on the number of message buffers used that was saved in the message buffer usage number save area at the previous startup. A method for replenishing real memory for message buffers, characterized in that an increase in the number of used buffers is determined, and the message buffer securing/releasing unit replenishes real memory corresponding to the increase in number and allocates it to the message buffer.