JPS6228847A - Monitoring system for state of process - Google Patents

Abstract

PURPOSE:To decide rapidly and precisely by outputting corresponding process information or a waiting event in accordance with anyone of the state, i.e. an executing state, a waiting state or an operation-enabled state, from a process relating to a monitor request. CONSTITUTION:When a process state display request command is inputted from a console 31, the inputted command is analyzed and the analyzed result is transferred to a process information acquiring means 22. When the process is in the executing state, the process information is acquired from a process control table 13 and displayed on a CRT 32. When the process is in the waiting state, the process information is transferred to a waiting process information acquiring means 23 and the waiting information is acquired from a process synchronization control means 14 and displayed on the CRT 32. When the specified process is in the operation-enabled state, the means 22 acquires the process information from the table 13 and transfers the process information to a process state means 24. If a specified program is not registered in the table 13, a message informing its unregistration is transferred to a display means.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a process status monitoring system that monitors the processing status of any process in response to an external request while a computer system is in operation. It is.

Conventional computer systems have not been able to directly monitor the processing status of running processes, and have been forced to forcibly interrupt operation when an abnormality that prevents the system from operating normally occurs. Investigate the cause of abnormal behavior by reading and analyzing the contents of the memory that displays the processing status of the process at that point in time, or by collecting the running history of the process and analyzing it after the fact. The method is to do so.

Problems to be Solved by the Invention In the above method of collecting information on process processing status by memory dump when an abnormality occurs, system operation must be interrupted in order to collect the information, and the information that can be collected by this method is The problem is that it is difficult to investigate the cause of an abnormality because it is only a static value that indicates the state at one point in time.

In addition, the method of analyzing driving history not only requires a large-capacity storage device to collect the driving history, but also has the problem that it takes a lot of effort to analyze a large amount of driving history.

In particular, even if a state occurs in which some of the processes that are processed in parallel do not operate for a long time, it is not possible to know this from the outside, and even if it could be known, is it a normal state? It is not possible to determine whether the condition is abnormal or not.

In large-scale computer systems such as online database systems, a large number of processes are processed in parallel, so errors in synchronization between processes may result in a situation where the user continues to wait for an event that cannot occur.

Structure of the Invention Means for Solving the Problems The process state monitoring system of the present invention which solves the problems of the prior art described above accepts a process processing state monitoring request issued from the outside while the computer system is operating. means, the process related to the monitor request is in the running state,
Depending on whether it is in standby or ready state,
By outputting corresponding process information and waiting events to the outside, the processing status of any process can be monitored at any time without stopping system operation.

Hereinafter, the operation of the present invention will be explained in detail together with examples.

Embodiment FIG. 1 is a functional block diagram showing the configuration of a process processing status monitoring system 20 according to an embodiment of the present invention, together with the configuration of related parts of a computer system 10 in which a group of processes to be monitored are processed in parallel. be.

The computer system 10 includes a processing section 11 and a main storage device 1.
2, and processes a group of processes to be monitored in parallel.

Operation of electronic computer system 10 1. --A teaching system creates a process within the system when a program is executed, and deletes that process when the program ends. The generated process is defined as a series of instructions executed by the processing unit 11. Although a plurality of processes exist simultaneously in the computer system 10, only one process is executed by the processing unit 11 at any given moment.

A generated process generally has states of running, waiting, and ready for operation. During execution, the process is under the control of the processing unit 11. While on standby, execution is not possible until a specific event occurs, such as completion of input/output. The ready state is a state in which the process is executable but is not controlled by the processing unit 11 because another process with a higher priority is being executed.

In order to control the parallel processing of the process group, information regarding each process is registered in the process control table 13 in the main storage device 12. In addition to information such as resources allocated to each process and process status, the process control table contains information such as the resources allocated to each process and the process status.
Various types of information are stored, including the contents of program counters and contents of various registers for processes in execution, and contents of program counters being saved for waiting and executable processes.

Process synchronization control means 14 formed in main memory 12
controls the synchronous execution and communication between processes. This process synchronization control means 14 manages waiting processes and events that they are waiting for. The event that a waiting process is waiting for is usually the result of each process requesting some processing from the operating system, information from other processes being processed in parallel, etc. It is expressed by the managed event control block name or semaphore name.

An event control block or semaphore has a meaning associated with the completion of concurrently processed events or the occurrence of some kind of effect.

The process synchronization control means 14 controls the transmission and reception of events between processes. Each process performs a signal sending operation and a signal receiving operation via the process synchronization control means. By sending a signal, each process notifies other processes of the processing results of the process, the availability of data, and the like. The process that sends the signal normally moves on to the next instruction. Each process examines the control blocks and semaphores for specified events to detect the signals it should receive. If such a signal exists, the receiving process advances the instruction. In the absence of such a signal, the receiving process remains in a waiting state.

The process state monitoring system 20 of this embodiment includes a command analysis means 21, a process information acquisition means 22, a waiting process information acquisition means 23, and a process state display means 24.

The command analysis unit 21 analyzes a process status display request command input from the console 31, and identifies which process status the request is for displaying. The process information acquisition means 22 acquires information on processes registered in the process control table 13. The waiting process information acquisition means 23 acquires waiting information such as an event that a waiting process is waiting for from the process synchronization control means 14 . The process status display means 24 displays the process information acquired by the process information acquisition means 22 and the waiting information acquired by the waiting process information acquisition means 23 on the CRT 32.
or output to the printer 33.

The operation of the process state monitoring system 20 having the above configuration is as follows:
This will be explained using the flowchart shown in FIG.

When a command for requesting process status display is input from the console 31, the command analysis means 21 performs step 4.
1, the contents of the input command are analyzed and the identification code and control of the process related to the request are passed to the process information acquisition means 22.

In steps 42 and 43, the process information acquisition means 22 acquires information about the specified process from the process control table 13.
Determine whether it is registered in the file. When the process information acquisition means 22 confirms in step 43 that the information on the designated process is registered, it proceeds to the next step 44 and determines whether or not the process is being executed.

If the process is being executed, the process information acquisition means 22 acquires the process information including the address of the executing instruction of the process and the process state from the process control table 13, and transfers the acquired process information and control to the process state. It is passed to the display means 24.

In step 46, the process status display means 24:
The acquired process information is displayed on the CRT 32.

If the specified process is on standby, the process information acquisition means 22 passes the identification code and control of the process to the waiting process information acquisition means 23. The waiting process information acquisition means 23 acquires waiting information such as events managed by the process synchronization control means 14 in step 48, and transfers this waiting information and control to the process information acquisition means 22.
Return to.

In step 49, the process information acquisition means 22
Process information including the contents of the program counter being saved is acquired from the process control table 13 and is passed to the process status display means 24 together with the waiting process information.

If the specified process is neither in execution nor on standby, that is, in an operable state, the process information acquisition means 22 stores the process information including the contents of the program counter being saved in the process control table in step 49. 13 and passes this to the process status display means 24.

In step 43, the process information acquisition means 22
If the program to be monitored is not started or if a command is input incorrectly, the specified process may be disabled in Process Control Table 1.
If it is determined that the process status display unit 24 is not registered, a message notifying that the process status display unit 24 is not registered is passed to the process status display unit 24.

In step 50, the process status display means 24:
Display unregistered messages on CRT32.

Effects of the Invention As explained in detail above, the process status monitoring system according to the present invention includes a means for accepting a process status monitoring request issued from the outside during operation of a computer system, and a process status monitoring system related to the monitoring request. depending on whether it is in a running state, a standby state, or a ready state,
Since it is equipped with a means for outputting corresponding process information, waiting events, etc. to the outside, the processing state of any process can be monitored at any time without stopping the operation of the system.

In particular, when a process is on standby, the position in the waiting program is displayed using the contents of the saved program counter, and the waiting event is also displayed, so that the waiting process can be correctly executed. It is possible to quickly and reliably determine whether the device is on standby or whether the device is in a standby state by mistake.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the configuration of a process state monitoring system according to an embodiment of the present invention together with related parts of a computer system, and FIG. 2 shows an example of the operation of the process state monitoring system 20 shown in FIG. It is a flow chart for explanation. 10...Electronic computer system, 11...Processing unit. 12... Main memory, 13... Process control table, 14... Process synchronization control means, 20... Process status monitoring system, 11... Command analysis means. 22: Process information acquisition means, 23: Waiting process information acquisition means, 24: Process status display means.

Claims (1)

[Claims] Monitoring the process status of a computer system that includes a process control table that manages control information for a plurality of processes that are processed in parallel, and process synchronization control means that controls mutual synchronous processing of the processes. A system, comprising means for accepting a process processing state monitor request issued from the outside while the computer system is in operation; The corresponding process information including the address of the instruction is outputted to the outside, and if the process related to the monitor request is in a standby state, the process synchronization control means manages the corresponding process information including the contents of the program counter being saved. means for outputting to the outside waiting information including the event that is being processed, and outputting to the outside corresponding process information including the contents of the program counter being saved if the process related to the monitor request is in an operational state. A process status monitoring system characterized by: