JPH0231225A - Test system for data control rule of buffer memory - Google Patents

Abstract

PURPOSE:To test the function of a data control rule at high speed despite the large capacity of a buffer memory area by giving a command to an input/output controller to freely change the capacity kept in a busy mode of the buffer memory area. CONSTITUTION:When the function of an FIFO is tested, a buffer area part 25 is entirely set to an idle slot and gives a command to an input/output controller 2 to store the data to be driven out as an undesired slot in the final step into the part 25. Then a command is given to an input/output controller 2 to change the number of slots kept under the busy modes. Then the contents of a slot control table are changed to the display of a busy mode from the display of an idle mode by the number designated by a command given from a computer system 1. Therefore it is possible to confirm the replacement of data with the data stored first just by producing a command to store the new data into the part 25 as long as a number is designated so as to eliminate all idle slots out of the memory 25.

Description

[Detailed Description of the Invention] The present invention relates to a test method for data management rules for M-shock memory,
In particular, the present invention relates to a test method for data management rules for buffer storage for temporarily storing data on the input/output device side for the purpose of quickly responding to data input requests from the computer system side.

In general, the test method for data management rules in buffer storage areas is that the buffer storage area is the maximum slot (a unit area of a predetermined size that is a unit of data storage or release).
When new data must be stored in the buffer storage area, the new data is correctly replaced with the data that is no longer needed based on predetermined data management rules. For example, FIFO (First In
When data is managed according to a rule called the First OuB algorithm, the entire buffer storage area is initially set to an empty state, and the first data is stored in the Mill storage area. Thereafter, the input/output control device is instructed to perform data input/output operations until the buffer storage area reaches a data holding state with the maximum number of slots in which there are no empty slots, and data is stored in the empty slots of the buffer storage area.

When the buffer storage area reaches the maximum number of slots, the input/output operation is instructed by the return input control device to transfer data to the MII storage area with no free space, which is holding data for the maximum number of slots. Give the replacement factor. The rules of the FIFO algorithm are tested by verifying that this instruction causes new data to be stored in the buffer storage area and the first data to be released in its place.

In the conventional buffer storage area data management rules test method described above, in order to set the buffer storage area to the test environment, instructions for input/output operations are issued until there are no empty slots in the buffer storage area. It is necessary to store data in empty slots, and there is a disadvantage that it takes time and effort to create a test environment, especially when the maximum number of slots in the buffer storage area is large (when the capacity of the M storage area is large). .

SUMMARY AND OBJECTIVES Therefore, the present invention has been made to solve the drawbacks of the prior art, and its purpose is to implement the functions of data management rules at high speed even if the capacity of the buffer storage area is large. The object of the present invention is to provide a data management rule test method that can be easily tested.

According to the present invention, there is provided a test method for testing data management rules in a buffer memory having a plurality of areas of a predetermined size that are units of data storage or release, wherein a management table having a flag indicating whether the corresponding area is free or in use, and a means for arbitrarily setting each flag in the management table; A test method is obtained in which the data management rules for buffer storage are tested by freely setting the data management rules.

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

FIG. 1 is a block diagram showing an embodiment of the present invention,
1 is a computer system, 2 is an input/output control device, and 3 is an input/output device controlled by the input/output control device 2. In the input/output control device 2, 2 is a command analysis section, 22 is a data transfer section, 23 is an input/output device control section, 24 is a buffer storage control section, and 25 is a ** storage section.

FIG. 2 shows a slot management table 201 that has a flag for managing whether the "in use state" is "free state" for each area (slot) obtained by dividing the buffer storage unit 25 into a certain arbitrary size.
This shows the management state of the slot management table 201 in the MII storage control unit 24 at a certain time.

Now, the input/output control bag! 2 is provided with an M storage section 25 within the input/output control device 2 for the purpose of transferring data between the computer system 1 and the input/output device 3 at high speed. In other words, data that is frequently accessed in the computer system 1 is maintained and managed on the M memory section 25, and data is updated as needed on the buffer memory section 25. On the storage control unit 24, in order to transfer data between the computer system 1 and the input/output device 3 as efficiently as possible, data should be held in either the storage unit 25 or the output device 3. Data is managed based on established data management rules.

Data transfer requests from the computer system 1 are sent to the command analysis unit 2.
Recognized by 1. The command analysis unit 21 requests the buffer storage control unit 24 to transfer the data specified to the computer system 1, 1! If the data to be transferred exists in the buffer memory 25, the storage control unit 24 directly transfers the data from the buffer memory 25 to the computer system 1 via the data transfer unit 22, and the data to be transferred is transferred to the buffer memory 25. When the data does not exist in the input/output device 25, the input/output device control unit 23 is driven to retrieve data from the input/output device 3 and transfer the data to the computer system 1 via the data transfer unit 22.

Therefore, if data can be transferred directly from the storage unit 25 as much as possible when requesting data transfer from the computer system 1,
This means that the computer system can respond quickly to l.
Therefore, when there is a command to store data from the computer system 1, a data management rule is adopted to hold the data in the buffer storage section 25 as much as possible.

Next, a method of testing whether data management operations based on the data management rules according to the present invention are being performed correctly will be described. The buffer storage control unit 24 divides the buffer storage unit 25 into slots, and records the usage status of each slot, that is, "
The status of the buffer storage section 25 is recognized by the slot management table 201 which displays "in use" and "vacant status", and data management operations are performed based on data management rules.

When attempting to store data from the computer system 1 in the buffer storage unit 25, the slot management table 201 is referred to, and if there is an empty slot, the data is stored in that slot, but if there is no empty slot, I/lI! One unnecessary slot from the F storage unit 25 is inserted into the input/output device 3.
to store new data.

When testing this kind of function, after setting all the buffer storage units 25 to empty slots, input/output a command to store data in the buffer storage unit 25 that will be evicted as unnecessary slots at the final stage. Next, the buffer storage section 2 newly provided in the input/output control device 2 is given to the control device 2.
5. The 0 command that gives a command to the input/output control device 2 to change the number of slots of the in-use Bj is analyzed by the command analysis unit 21, and then sent to the buffer storage control unit 24 to change the slot management table 201. Instructions will be communicated.

The buffer storage control unit 24 changes the contents of the slot management table 201 from "empty FliJ" to "used Bj" by the number of slots specified by the command from the computer system 1. Therefore, input/output control is performed. In the command given to the device 2 to change the number of slots in the [in-use state], if a number is specified so that there are no empty slots in the buffer storage unit 25, the buffer storage unit 25 will appear to be empty due to the above command. This means that the area is set to be empty. Here, a command is again given to the input/output control device 2 to store new data on the buffer storage section 25, and at this time, the first buffer storage section 25
The data management rules can be confirmed by confirming that the data stored on 5 has been replaced with the data for which the last storage request was made.

As explained above, according to the present invention, the buffer storage area "
By equipping the input/output control device with a command that can freely change the capacity that is in the "in use state", when testing data management rules in the buffer storage area, it is possible to By giving commands to the input/output control device that can freely change the capacity of the Mfm storage area in the "in use state" without changing the capacity in the "in use state", the functions of data management rules can be easily implemented. , @ has the effect of being able to do it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a slot management table. Explanation of symbols of main parts

Claims (1)

[Claims] (1) A test method for testing data management rules in a buffer memory that has multiple areas of a predetermined size that serve as units of data storage or release, in which a corresponding area is provided corresponding to each of the areas, and the corresponding area is free. A management table having a flag indicating whether it is in use or in use is provided, and a means for freely setting each flag in the management table is provided, and the number of flags in the management table in the use state is freely set, and buffering is achieved. A test method characterized by testing memory data management rules.