JPS63316148A - History control system - Google Patents

Abstract

PURPOSE:To sample effective history information by stopping a history operation in a queue state, by setting an idle loop flag when a state enters an idle state, and stopping the write of information on a history memory transiently. CONSTITUTION:The idle loop flag 3 is set at the time of executing an idle processing 2, and is reset by idle loop flag resets 3-1-3-3 when a processing other than the processing 2 is executed. When the flag 3 is set, the write of history information on the history memory 1 is stopped transiently. Meanwhile, when the processing other than the processing 2 is executed, the flag 3 is reset, and the write of the history information on the memory 1 is started. In such a way, it is possible to sample the effective history information without rewriting the history information obtained at a preceding processing by writing level change in the idle state, etc., on the memory 1 repeatedly.

Description

[Detailed Description of the Invention] [Summary] The present invention provides a history control method that collects the history of processing in a computer system in a Wi-ring manner, in which a level change instruction is collected as history information when an idle state continues. In order to solve the problem that the previous FF history is rewritten when the FF history is rewritten, it is necessary to set an idle loop flag to temporarily stop writing to the history memory when entering the idle state, or to use a history stop command. A new history restart command is also provided to temporarily stop writing to the history memory when the system enters the idle state, thereby prohibiting writing in the waiting state and allowing valid history information to be collected. .

[Industrial application field]

The present invention relates to a history control system that is configured to temporarily stop writing to a history memory when an idle state is entered.

[Problems to be solved by conventional technology and invention] Conventionally,
A history memory is provided as a means for collecting the history of the hardware and programs of a computer system, and history information is stored in this memory in a circular manner, and the history information is retrieved as needed to examine the history.

After executing and completing a certain process, it investigates and determines whether the next request has come, issues a level change instruction to branch to the start address of the process with a higher priority, and starts the next process. There is. At this time, if the next processing request does not come, the device remains in a waiting state (idle state), continues issuing level change commands, and continues waiting for the next processing request to arrive. If such an idle state continues, the history is collected in the history memory without stopping even during this idle state, so the level change command remains as history and the history of the previous process is rewritten. There was a problem. Furthermore, if a history of previous processing is to be kept, there is a problem in that a huge amount of history memory is required. A simple explanation will be given below using FIGS. 4 and 5.

In FIG. 4, the history memory 11 is the idle processing 1
2. Regardless of whether any of processes 2-1 to 12-3 is being executed, history information is always collected in a circular manner, so when the idle state occurs, a level change command is issued. etc. are collected repeatedly.

In Fig. 5, execution of the process starts at 0 in the figure, and @
When the process is finished, the level change command is executed at 0 in the figure, and if there is no processing request, 0 in the figure is repeatedly executed and the system waits, so the history is collected to the history memory at ■ in the figure. It is in operation, and the level change command etc. is repeatedly collected. Further, if a processing request is made at 0 in the figure, execution of the next process is started at 2 in the figure.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention sets an idle loop flag 3 to temporarily stop writing to the history memory 1 when entering an idle state, or a history stop command 5 and a history restart command. 6 is newly provided to temporarily stop writing to the history memory 1 when entering the idle state, thereby inhibiting writing in the waiting state and making it possible to collect effective glue layer information.

Means for solving the problem will be explained with reference to FIGS. 1 and 2.

In FIG. 1, a history memory 1 is for collecting H history information.

Idle processing 2 is processing for waiting.

When this idle processing is started, idle loop flag 3 is set.

When the idle loop flag 3 is set, writing of history information to the history memory 1 is temporarily stopped, and when reset, the writing is restarted.

In FIG. 2, a history stop instruction 5 is a microinstruction newly provided to stop reading history information into the history memory l.

The history restart instruction 6 is a newly provided microinstruction to start writing 1IIUIi to the history memory 1.

[Effect]

Next, the operation will be explained.

In FIG. 1, if there is no processing request, execution of idle processing 2 is started by level changes 4.4-1 to 4.4-3. At this time, the idle loop flag 3 is set by the first execution of the idle process 2, and writing of history information to the history memory 1 is stopped. When there is a processing request, level change 4 is used to perform processing corresponding to the processing request, for example, processing +112.
-1, idle loop flag reset 3-1 is executed, idle loop flag 3 is reset, and writing of history information to history memory 1 is started.

In addition, in Figure 2, the process ends at ■ in the figure, and
In the level change, if there is no processing request,
History stop command 5 is issued and history memory 1
Writing of history information to is temporarily stopped. If there is a processing request, a history restart command 6 is issued at ■ in the figure, and writing of history information into the history memory 1 is restarted.

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be explained in detail using FIGS. 1 to 3.

In FIG. 1, idle loop flag 3 is set when idle processing 2 is executed, and is reset by idle loop flag resets 3-1 to 3-3 when processing other than idle processing 2 is executed. When this idle loop flag 3 is set, writing of history information to the history memory 1 is temporarily stopped.

Level change 4.4-1 to 4-3 means executing a level change command, thereby processing corresponding to the request, for example, processing +1+ 2-1 to 2-3
One of these will be executed. At this time, processing fl
+ Before any of 2-1 to 2-3 is executed, idle loop flag 3 is reset by idle loop flag reset 3-1 to 3-3, and history information is not written to history memory 1. It will be restarted. Note that if there is no processing request, idle processing 2 is executed, idle loop flag 3 is set, and writing of history information to history memory 1 is temporarily stopped.

As described above, the idle loop flag 3 is provided, and when the idle processing 2 is executed, the idle loop flag 3 is set to temporarily stop writing the H layer information to the history memory 1, and on the other hand, When processing other than idle processing 2 is executed, this idle loop flag 3 is reset and writing of history information to history memory 1 is started, thereby repeating level change commands etc. to history memory 1 in the idle state. It is possible to collect valid history information without overwriting the history information of the previous process.

Next, using FIGS. 2 and 3, a history stop command 5 and a history restart command 6 are newly provided, and 1! in the idle state is created. A case in which history information collection is temporarily stopped will be explained in detail.

In FIG. 2, ■ in the figure indicates a state in which execution of the process is started.

■ in the figure indicates a state in which the processing has been completed. Between ■ and ■ in the figure, writing of history information to the history memory is performed in a circular manner B as shown in ■ in the figure.

■ in the figure indicates a state in which a level change command is executed in order to start the next process upon completion of the process in ■ in the figure.

Here, if there is no processing request, a history stop command 5 is issued at ■ in the figure, and writing of history information to the history memory 1 is temporarily stopped at ■ in the figure. on the other hand,
If the next processing request has already arrived when the previous processing request ends (at the time of ■ in the figure), the next process is executed continuously at the time of ■ in the figure. The processing request did not come when the previous processing finished, and after issuing the history stop command 5 at ■ in the diagram to temporarily stop writing the ff history information to the history memory 1, the processing request came. In this case, issue the history start command 6 at ■ in the figure, and start the history memory 1 at ■ in the figure.
Resumes writing of history information to. And in the figure ■
Executes the requested process.

FIG. 3 shows a circuit for stopping writing of history information to the history memory. A history stop flag 8 in the figure is set when a history stop command 5 is issued, and reset when a history start command 6 is issued. When this history stop flag 8 is set, the write enable signal is no longer supplied to the history memory 1, and writing of history information is temporarily stopped, and at the same time, incrementing to the address register 9 is stopped.

As described above, writing of history information to the history memory 1 is temporarily stopped by issuing the history stop command 5 when the state becomes idle, decoding this command, and setting the history stop flag 8. Ru. Then, when a process other than idle processing is started, a history restart command 6 is issued, this is decoded, and the history stop flag 8 is reset, thereby restarting the loading of history information into the history memory 2. .

〔Effect of the invention〕

As explained above, according to the present invention, when the idle state is entered, the idle loop flag is set to temporarily stop writing to the history memory, or the history stop command and the history restart command are executed. Since we have adopted a new configuration that temporarily stops writing to the history memory when entering the idle state, we can: 1) Prohibit the writing of H layer information in the idle state and collect valid history information; can do.

[Brief explanation of drawings]

1 and 2 are configuration diagrams of one embodiment of the present invention, and FIG. 3 is a circuit for stopping writing of history information to the history memory.
FIGS. 4 and 5 show configuration diagrams of the conventional system. In the figure, 1 is history memory, 2 is idle processing, 2-1
or 2-3 is processing, 3 is idle loop flag, 3-
1 to 3-3 reset the idle loop flag; 4.
4-1 to 4-3 represent level changes. Oh (prosthetically) Ige J 1st-20,000th (Figure (
Part 2) Bay 2 Figure Historime t Rehe 几Goto Anzuzai 1's wealth power Lun 1 time "Getaku 3 Figure Tsukirai style Kankabuto 5 ■ Ash map (1000 2) Figure

Claims (2)

[Claims] (1) In a history control method that collects the history of processing in a computer system in a circular manner, when determining the address of the next processing, it is set when a branch is made to an idle processing, and is set when processing other than the idle processing An idle loop flag (3) is provided that is reset when a branch is made to A history control method characterized by being configured to temporarily stop incrementing. (2) In a history control method that collects the history of processing in a computer system in a circular manner, a history stop instruction (5) that stops writing to the history memory (1) and a history start instruction (6) that starts it.
When determining the address for the next process, a history stop command (5) is issued when the system enters the idle state to temporarily stop writing to the history memory (1), and the process returns from the idle state. A history control system characterized in that a history start command (6) is issued to restart writing to a history memory (1) when another process is executed.