JPH01177133A - Event information system - Google Patents

Abstract

PURPOSE:To realize a highly efficient system with high quality by performing the simultaneous delaying processes among the events of plural running levels. CONSTITUTION:The means (event level registers) 1-4 hold the running levels informing events by an amount equal to the running levels prescribed by a CPU 8. A means 5 compares the running levels under execution with registers 1-4 and decides the presence or absence of information of events. Then a means 5 informs the events. Then the holding of event information can be set independently of each other for all existing running levels. Thus it is possible to obtain a highly efficient event information system with high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an event notification method in a computer system, and particularly to an event notification method for a central processing unit having a plurality of running levels.

[Conventional technology]

In a computer system, a program that manages the system (operating system, hereinafter referred to as O8) needs to suspend event processing until a certain point, rather than processing events such as interrupts immediately after they occur. In other words, if an event that changes the internal state of the system occurs while O8 is executing an indivisible area such as updating the internal state of the system, it will recognize the occurrence of the event and suspend processing of the event until the indivisible area is exited. There is a need to.

In conventional systems, the above processing is performed using complicated software, or in some central processing units that have multiple driving levels, only one driving level is set for event processing, and then the driving level is set. A feature was provided that allowed the processing of events to be delayed until a certain driving level was reached, and this was done using somewhat simplified software that used that feature.

[Problem that the invention seeks to solve]

Each of the conventional event notification methods described above has the following drawbacks.

- Processing using only software results in a fairly complex software structure, and there are considerable problems in terms of performance and quality.

・A method that uses the delay function of one driving level in the central processing unit. Only Lebel can set the driving level for event processing, so events of multiple driving levels (e.g. Eva, user and system level) are requested at the same time. If
It still needs to be processed using software, and there are still problems in terms of performance and quality.

The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a system with higher efficiency and quality by making it possible to delay processing events of multiple driving levels simultaneously.

[Means for Solving the Problems] According to the present invention, in a computer system having a central processing unit having a plurality of running levels, there is provided a means for retaining the running level for which an event is notified for the running level prescribed by the central processing unit. (Hereafter referred to as event level register)
and a running level event level register that is being executed to determine whether there is an event notification, and a means for notifying an event, and independently suspending event notification for all existing running levels. The event notification method can be changed.

〔Example〕

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

FIG. 1 shows an example of a central processing unit with four running levels.

In a computer system, when an interrupt occurs in an operating system (hereinafter referred to as O8) that manages the system, an interrupt control device 7 notifies a central processing unit 8 that an event has occurred.

If the received event is an indivisible area for the process currently being executed, the central processing unit 8 does not process the event and sets the level at which the event is processed to the event level.
Set to level register.

If the running level at which the event is processed is 0, an event level 0 register of 1 is set to suspend the event processing. At this time, when another event is transmitted from the interrupt control device 70 to the central processing unit 8, the central processing unit 8 processes the event if the running level is 3.
The event level 3 register is set to suspend event processing.

After completing the processing of the indivisible area, the central processing unit 8 is put on hold and if there is an event, the device 6 holds the current running level and the device 6 compares the event level register with the event level register and notifies the event. 5, the presence or absence of an event is notified and the event can be processed.

〔Effect of the invention〕

As explained above, the present invention provides an event/event notification level for maintaining event notification levels corresponding to each driving level.
By providing a level register, it is possible to delay event notification even when a plurality of different events occur simultaneously in a task.

Furthermore, by using this event notification method, it is possible to provide a system with higher efficiency and quality than conventional methods that process processing using only software or methods that utilize a delay function of one trip level in the central processing unit. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention. 1...Event level 0 register, 2...
...Event level register, 3...
Event level 2 register, 4...Event level 3 register, 5...Event notification control register, 6...Driving level holding register, 7... ...Interrupt control unit, 8...Central processing unit. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] In a computer system having a central processing unit having a plurality of driving levels, a means (hereinafter referred to as
(referred to as an event level register), a means for comparing the running level being executed with the event level register to determine the presence or absence of an event notification, and a means for notifying an event, and for all existing running levels. An event notification method characterized in that it is possible to independently set suspension of event notification for each event notification method.