JPH07141273A - Communication performance adjustment processor - Google Patents

Abstract

PURPOSE:To provide a communication performance adjustment processor which observe a communication state of respective parameter values and determines parameter values for obtaining an optimum value of communication performance by automatically varying the communication control parameters as to communication control over a computer. CONSTITUTION:A communication processing part 10 sends and receives data to and from an opposite device 17 through a communication line 2, and a specification acceptance part 11 accepts measurement specification, and a parameter variation part 12 sets different parameters in order for specific parameters among communication control parameters 18 according to the specification, and a communication observation part 13 requests the communication processing part 10 to perform a specific communication control process by the respective set parameter values, observes a communication by the requested communication control process, and samples measured values showing specific states by the respective parameter values. Then, an optimum parameter determination part 14 compares the sampled specific values with one another to determine parameter values which make measured values meet specific optimum conditions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to automatically measure the relationship between various parameter values for communication control and communication performance, automatically determine the optimum parameter value, and automatically set the optimum parameter. The present invention relates to a communication performance adjustment processing device capable of performing.

[0002]

Prior Art and Problems to be Solved by the Invention FIG.
This is a configuration example of a known computer system, and a communication processing unit 1a is connected to a communication processing unit 1b of a partner computer via a communication line 2 in order to perform communication between computers.

When the business processing section 3 which executes a program requiring communication between computers attempts communication, it designates a necessary data area for the communication processing section 1a and transmits data. Alternatively, it requests reception of data from the partner computer.

The communication processing unit 1a is composed of hardware for forming an interface with the communication line 2 for transmitting and receiving signals for communication, and hardware and software for executing communication processing. The communication processing unit 1b is also the same. is there.

When the communication processing unit 1a receives a data transmission request from the business processing unit 3, it fetches the data in the designated data area from the beginning into a buffer with a constant buffer length, and according to a constant transmission control procedure, The control information of the prefix and the suffix is added to the data on the buffer to form a transmission block, which is then transmitted.

Further, before and after sending out one to a certain number of transmission blocks, necessary control information is exchanged according to a transmission control procedure, and when response information indicating the detection of a transmission error is received from a partner device. Performs processing such as re-transmission by going back to a predetermined number of transmission blocks including the transmission block in which an error has occurred.

When receiving the data reception request, the communication processing unit 1a receives the transmission block sent from the partner device in the same manner as described above, checks the received block for an error, and transfers the necessary control information. For example, the reception process according to the transmission control procedure is executed, and the data of the normally received transmission block is sequentially transferred to the designated data area of the work processing unit 3.

In the above, each value such as the buffer length of the transmission block, the number of continuous transfer blocks, the number of retransmissions until the transmission is aborted when the error continues, and the time interval of the retransmission in that case are the communication values. It is supposed to be specified as control parameter 4, and for example, the system administrator
It is set in the communication processing units 1a and 1b when the system is configured.

As is well known, the values of those communication control parameters affect communication performance such as communication data transfer time and communication line utilization efficiency in relation to the environmental conditions of the system.

Therefore, the system administrator empirically determines the value of the communication control parameter for obtaining a high communication performance in consideration of the length of transmission / reception data handled by the application of the system, the transmission speed of the communication line, the error occurrence rate, and the like. Therefore, it is necessary to set it in the communication processing unit.

An object of the present invention is to provide a communication performance adjustment processing device for automatically changing communication control parameters, observing a communication state at each parameter value, and determining a parameter value for obtaining an optimum value of communication performance.

[0012]

FIG. 1 is a block diagram showing the configuration of the present invention. The figure shows the configuration of the communication performance adjustment processing device, in which the communication processing unit 10 executes communication control processing for transmitting and receiving data to and from the partner device 17 via the communication line 2 and is required for the communication control processing. When various control values can be set from the outside as the communication control parameter 18, a device for connecting to the communication processing unit 10 to adjust the communication control parameter, and a designation receiving unit 11, It has a parameter changing unit 12, a communication observing unit 13, and an optimum parameter determining unit 14.

In the first invention, the designation receiving unit 11 receives a measurement designation input from the outside, and the parameter changing unit
For the designated parameter of the communication control parameters 18, 12 sets different parameter values in the communication processing unit 10 sequentially according to the designation.

The communication observing section 13 executes the designated communication control processing for each set parameter value.
Communication is performed, the communication by the requested communication control processing is observed, and a measurement value representing a predetermined state is collected for each parameter value.

The optimum parameter determination unit 14 determines the parameter value when the measured values satisfy a predetermined optimum condition by mutually comparing the sampled measured values. In the second invention, the parameter changing unit 12 transmits a message instructing to set a specified parameter value to the partner device 17 when a predetermined specification is made by the specification,
When receiving the instruction message transmitted by the partner device 17, the parameter value instructed by the message is set to the communication processing unit 10.

[0016]

The communication performance adjustment processing apparatus of the present invention automatically observes the communication state when the designated communication control parameter is changed, and obtains the optimum parameter value.

Therefore, the parameters held by the communication processing unit are appropriately changed based on the optimum parameter value,
Alternatively, it is possible to automatically change the obtained optimum parameter value.

[0018]

FIG. 2 is a block diagram of a computer system showing an embodiment of the present invention. The communication processing unit 10a is connected to the communication processing unit 10b of the partner computer via the communication line 2 similarly to the conventional communication processing unit 1a, and in the same manner as described above, the communication processing unit 10a includes the business processing unit 3a. Request to send and receive data.

According to the present invention, the communication processing units 10a and 10b are provided with
The communication performance adjustment processing devices 20a and 20b are connected. The communication performance adjustment processing devices 20a and 20b may have, for example, the same configuration, and include a designation receiving unit 21, a parameter changing unit 22a or 22b, a communication observing unit 23a or 23b, and an optimum parameter determining unit 24, and each unit will be described below. As is clear from the above, it has a function corresponding to the designation receiving unit 11, the parameter changing unit 12, the communication observing unit 13, and the optimum parameter determining unit 14 of FIG.

When the communication performance adjustment processing device 20a measures / adjusts the communication performance, for example, the necessary specification is input from the terminal device 26. In the following, the communication performance adjustment processing device
The description will be made assuming that 20a is configured to perform data transmission with various buffer lengths and observe the data transfer time in order to adjust the buffer length of the communication control parameters.

FIG. 3 is a diagram showing an example of the processing flow of the communication performance adjustment processing device 20a.
a is started by the designated input from the terminal device 26, and the designation receiving unit 21
Receives the specified information in processing step 30, sets the information in the necessary control information area of each unit, and then passes control to the parameter changing unit 22a.

The designation information includes, for example, the initial value and increment value of the buffer length, the maximum number of trials, and designation of transmission data. The transmission data designation is omitted when the communication observation unit 23a has a certain data example in advance, and when there are several types of data examples, the type is designated or a data example is provided. Instead, the data may be input from the terminal device 26 each time it is designated.

The maximum number of trials is the maximum value of the number of changes of different buffer lengths until the observation is terminated, and a default value may be set. As shown in FIG. 4, when the data transfer time to be observed decreases with an increase in the buffer length, and when the buffer length starts to increase, the observation is completed up to that point regardless of the maximum number of trials, and the transfer time The minimum buffer length is set as the optimum buffer length.

The parameter changing unit 22a uses the processing step 31.
Then, necessary control information is initialized, the temporary buffer length is set to a value to be used for the first time, the number of trials is set to 1, and the minimum observed value is temporarily set to the maximum value.

Next, the communication observing unit 23a executes the processing step 32.
Then, by issuing a request to the communication processing unit 10a, the communication performance adjustment processing device 20b via the communication processing unit 10b of the partner computer.
A communication path is established between the two devices so that data can be exchanged between both devices.

After the above preparation, the parameter changing unit 22a sets the value set as the temporary buffer length in the communication control parameter 18a in the processing step 33. In addition,
When there is a specific designation, the parameter changing unit 22
Since a sends a parameter change instruction message to the communication observation unit 23b of the other party and specifies, for example, the temporary buffer length, the parameter change unit 22b of the other party changes the communication control parameter 18b according to the message.

After the above, the communication observing unit 23a performs processing steps.
At 34, the time measurement is started, and at step 35, the communication processing unit 10
The data transmission request is sent to a, and the communication processing unit 10a executes the data transmission process to the communication observation unit 23b of the other party.

A series of data transmission processing by the communication processing unit 10a is completed depending on whether the transmission of all requested data is completed or whether the transmission processing is stopped due to a transmission error or other abnormal state that cannot be recovered even by repeating retransmission, Communication observation unit 23a
Is notified of the end, the communication observation unit 23a collects the elapsed time from the transmission request to the end in processing step 36.

When it is necessary to obtain the communication efficiency in consideration of the occurrence of a transmission error, in the processing step 35, for example, the same data example is repeatedly transmitted a plurality of times,
Or, transmit the appropriate multiple data examples and observe the total elapsed time.

Then, in the processing step 37, the end state is identified, and if the abnormal end, the observation is stopped, but if the data transmission is completed, the optimum parameter determination unit 24 performs the processing step.
At 38, it is determined whether the optimum parameter can be determined based on the elapsed time actually collected (hereinafter simply referred to as elapsed time).

In this determination, for example, the held minimum observed value is compared with the elapsed time, and if the elapsed time is smaller than the minimum observed value, it is determined that the optimum parameter has not been determined. If the elapsed time is equal to or greater than the minimum observed value, it is determined that the optimum parameter can be determined, and the buffer length used in the previous trial (stored as the previous buffer length) is determined as the optimum parameter in processing step 42. The value is determined, the parameter change unit 22a is notified, and the value is output to the terminal device 26.

Therefore, in the processing step 43, the parameter changing unit 22a sets the corresponding parameter of the communication control parameter 18a to the determined optimum value, for example. Further, as described above, when the parameter change instruction message is sent to the communication observation unit 23b of the other party, a message notifying the optimum parameter value is sent, and the communication parameter control unit 18b of the other party sets the communication control parameter 18b to the optimum value. Let it set.

After the above, in the processing step 44, the communication processing unit 10
Requesting a, the communication path with the communication performance adjustment processing device 20b of the other party is closed, and the processing is ended. If the optimum parameter is not determined, the optimum parameter determination unit 24 stores the elapsed time as a new minimum observed value in processing step 39,
Since the parameter changing unit 22a is notified, the parameter changing unit 22a identifies whether the number of trials has reached a predetermined maximum value in processing step 40, and if it has reached the maximum value, the processing is stopped here, for example.

If the maximum number of trials has not been reached, the number of trials is incremented by 1 in processing step 41, the current temporary buffer length is stored as the previous buffer length, the temporary buffer length is increased by the designated increment value, and the processing is performed. Return to step 33.

[0035]

As is apparent from the above description, according to the present invention, regarding the communication between computers, the communication state when the specified communication control parameter is changed is automatically observed, and the optimum communication efficiency is improved. There is a remarkable industrial effect that the parameter value of can be obtained.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 3 is a flow chart of processing of the present invention.

FIG. 4 is a diagram illustrating a relationship between a buffer length and a data transfer time.

FIG. 5 is a block diagram showing a configuration example of a computer system.

[Explanation of symbols]

 1a, 1b, 10, 10a, 10b Communication processing unit 2 Communication line 3 Business processing unit 4, 18, 18a, 18b Communication control parameter 11, 21 Designation receiving unit 12, 22a, 22b Parameter changing unit 13, 23a, 23b Communication observation Section 14, 24 optimum parameter determination section 17 partner apparatus 26 terminal apparatus 30-44 processing steps

Claims (2)

[Claims] 1. A communication processing unit (10) executes communication control processing for transmitting and receiving data to and from a partner device (17) via a communication line (2), and various controls necessary for the communication control processing. A device for connecting to the communication processing unit and adjusting the communication control parameter when the value can be set from the outside as a communication control parameter, the designation receiving unit (11) and parameter change It has a unit (12), a communication observation unit (13), and an optimum parameter determination unit (14), and the designation receiving unit (11) receives a measurement designation input from the outside, and the parameter changing unit (12) ) Is the communication control parameter (18)
Of the designated parameters among the designated parameter values are sequentially set in the communication processing unit (10) according to the designation, and the communication observation unit (13) sets the designated communication control processing for each set parameter value. Is requested to the communication processing unit (10), the communication by the requested communication control processing is observed, a measurement value representing a predetermined state is collected for each parameter value, and the optimum parameter determination unit (14 ) Is configured to determine the parameter value when the measured value satisfies a predetermined optimum condition by mutual comparison of the collected measured values. 2. The parameter changing unit (12) sends a message instructing to set a designated parameter value when the designated designation is given by the designation.
(17), and when the instruction message transmitted by the partner device is received, the parameter value setting instructed by the message is set to the communication processing unit (10). The communication performance adjustment processing device according to claim 1, wherein