JPS61131136A - History accumulating system - Google Patents

Abstract

PURPOSE:To accomplish an efficient history storage processing by storing a changed status only when there is a change between an object status at a time and same object status before predetermined several clock number so as to compress the history. CONSTITUTION:A status set to a register 5 from a digital computer 3 and a status before one clock set to a register 6 before one clock are compared by a comparator circuit 7. A discrimination bit representing the difference is generated from the circuit 7 and set to a discriminating bit register 8. While the bit of the register 8 is stored in a discrimination bit memory 2 at each clock, the bit is used to control whether or not the status of a register 5 is outputted to the history memory 1 via selection circuits 9, 10 outputted selectively. The storage to the memory 1 is executed at each clock only when an output is given from the circuits 9, 10. The is, only when the discriminating bit represents that there is a change in the status, the status of the register 5 is stored in the memory 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a history accumulation method in which only changes in the status history of a digital processing device are accumulated when the history is accumulated.

BACKGROUND ART In digital computers and the like, a technique is used in which the status of each internal part is stored for each clock and the operation history is accumulated as a means for later checking a series of processing results therein. In order to obtain such an operation history, this type of device not only requires a relatively large number of parts to store its status, but also stores its status for each clock in the clock time series. The amount of data that must be stored is also considerable. Therefore, it is inevitable that the storage capacity thereof will also increase.

[Conventional technology]

The conventional history storage method was to store all of the necessary history information in memory. In other words, all of the operation history of the object to be stored is stored in the memory, regardless of whether or not the operation status has changed.

[Problem that the invention seeks to solve]

Therefore, even if the operation status remains unchanged, that is, the same history information, it is stored in the memory. Therefore, not only is it necessary to prepare a large capacity memory, but also the inefficient processing mode of storing the same history information has naturally been adopted.

[Means for solving problems]

The present invention provides a history accumulation method that solves the above-mentioned problems, and the first means thereof is a first status storage system that temporarily stores the status for each clock determined in advance from the digital processing device. means, second status storage means for storing the status a predetermined number of clocks earlier than the clock at which the status was stored in the status storage means, and the status of the first status storage means and the second status storage means. a determination means that compares the status of the determination bit with the determination bit and outputs the determination bit each time; a determination bit memory that stores the determination bit each time it occurs; and a status history memory that stores the status according to a change in the determination bit. The second means is that the status from the digital processing device is sent from each part of the digital processing device, and the judgment is made in accordance with this. A selection circuit is added to the first means for selectively outputting the status of the corresponding first status storage means to be stored in the status history memory in response to a change in a bit.

[Effect]

According to the method of the present invention, the status of an object from a digital processing device at a clock time of The target status at the above-mentioned closing time is stored in the status history memory only when there is a difference between the above-mentioned two statuses.

In this way, since the changed status is stored only when there is a change in the status, the storage capacity can be reduced, that is, the history can be compressed, and efficient history accumulation processing can be performed. .

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The accompanying drawings show an embodiment of the present invention, and this embodiment is for a case where the functions of each part of a digital processing device, for example, a digital computer, do not change simultaneously from one block to the next. The functions are divided into blocks, and the history of these blocks, that is, several types of functions that do not change at the same time, is stored in the history memory (status history memory).
1, while providing a decision bit memory 2 used to successfully restore the contents of the history memory 1, in which each function blocked in the memory 2 is assigned a predetermined number of clocks, e.g. In order to store a determination bit indicating whether or not a difference from the previous state (status) has occurred for every predetermined number of clocks, for example, every clock, the system of the present invention is equipped with the following components. is configured.

That is, the status information output of each of the five functional blocks of the digital computer 3 is shown on line 4. It is connected to the corresponding input of the history register (first status storage means) 5 via 4S to 4S. Each output of the register 5 is connected to a corresponding input of a history register (second status storage means) 6 one clock ago (or a predetermined number of clocks ago), and a comparison circuit 7
is connected to one input of the The other input of the comparison circuit 7 is connected to the output of the history register 6.

In the above example, the comparison circuit 7 outputs five judgment bits,
Each bit output of the 0 judgment pit register 8 which sets these bits in the judgment bit register 8 is connected to the judgment bit memory 2. Furthermore, the three bit outputs of the judgment pit register 8 are connected to the selection control input of a selection circuit 9 that selects any one of the three outputs of the history register 5 and outputs it to the history memory 1. 8
The remaining two bits output from the remaining two bits of history register 5.
It is connected to a selection control input of a selection circuit 10 that selects any one of the two outputs and outputs it to the history memory 1.

With this configuration, only when there is a change in the status of a blocked function, that status is stored in history memory 1, and the determination bit is set to ensure that the status is successfully restored. 1 is stored in the judgment bit memory 2 every clock (or every predetermined number of clocks).In other words, the status set in the register 5 from the digital computer 3 and the 1 set in the register 6 one clock ago are stored in the judgment bit memory 2. The comparison circuit 7 compares the status with the previous one, generates a judgment bit indicating the difference, and sets the judgment bit in the judgment pit register 8.

The bits of this register 8 are stored in the judgment bit memory 2 every clock, and are also used to control whether or not to select and output the status of the register 5 to the history memory 1 via the selection circuits 9 and 10. It will be done. Selection circuit 9.1
Storage in the history memory 1 is performed every clock only when there is an output from 0. That is, the status of register 5 is stored in history memory 1 only when the determination bit indicates that there has been a change in status.

In this way, it is possible to reduce the memory capacity required to store the status, or in other words, compress the history. Therefore, it becomes possible to efficiently perform status storage processing.

Note that in the above embodiment, the case of storing each status of a blocked function in the history memory was explained as an example, but in this example, the case of storing a status stream for a function that is not blocked or a single function is explained. Invention is not exclusive.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to achieve the following effects: (1) it is possible to reduce the storage capacity required for history accumulation (history compression), and (2) the accumulation can be carried out efficiently.

[Brief explanation of drawings]

The accompanying drawings illustrate one embodiment of the invention. In the figure, 1 is a history memory, 2 is a judgment bit memory, 3 is a digital computer, 5 is a history register, and 6 is a 1
A history register before the clock, 7 a comparison circuit, 8 a judgment pit register, and 9.10 a selection circuit.

Claims (3)

[Claims] (1) A first status storage means that temporarily stores the status for each predetermined clock from the digital processing device, and stores the status a predetermined number of clocks before the clock that stored the status in the status storage means. a second status storage means; a determination means for comparing the status of the first status storage means and the status of the second status storage means and outputting a determination bit each time; The present invention is characterized in that it is provided with a judgment bit memory that stores the status each time the judgment bit changes, and a status history memory that stores the status of the first status storage means according to a change in the judgment bit, so as to perform storage processing for changes in status. History accumulation method. (2) A first status storage means for temporarily storing each status for each predetermined clock from each part of the digital processing device, and a status for a predetermined number of clocks before the clock that stored the status in the status storage means. a second status storage means for storing each of the above, and a determination means for comparing the status of the first status storage means and the status of the second status storage means and outputting a corresponding determination bit each time; a judgment bit memory that stores the judgment bit each time it occurs;
a status history memory that stores the status of the first status storage means in response to changes in the determination bit;
and a selection circuit for selectively outputting the corresponding status of the first status storage means to be stored in the status history memory in response to a change in the determination bit, so as to perform storage processing for changes in status. This is a history storage method that is characterized by: (3) The history accumulation method according to claim 2, wherein the statuses from each part of the digital device belong to a group of functions that do not change simultaneously.