SU1739375A1 - Interruption handler - Google Patents

Abstract

The invention relates to computing and can be used in computer switching nodes and software-controlled PBX. The purpose of the invention is to expand the scope by introducing an absolute priority mode for unblocked requests. The second group of elements AND 1, the second element OR-NOT 6, the element OR 7 and the one-shot 8 are entered into the device. The device increases the service intensity (L C x | with CJ XI)

Description

those requests, the number of which has not reached its threshold, due to the interruption of service requests of those types, the number of which

reached its threshold if unlocked requests were received at the inputs of the device. 2 Il.

The invention relates to computing and can be used in electronic control machine switching nodes and programmable automatic telephone exchanges.

A control device containing elements I.

A control device containing interrupt masking triggers, AND elements, interrupt request triggers is known.

The disadvantage of these devices is the narrow scope.

The closest to the proposed device is an interrupt control device containing n And elements, the first inputs of which form a group of inputs of interrupt requests, second inputs — a group of inputs of masked interrupts, third inputs of a group of elements And are connected to the outputs of the corresponding elements of the group OR, outputs of a group of elements AND are a group of device outputs, n counters, the inputs of which are connected to the outputs of the corresponding elements of the AND group, and the inverse outputs with the first inputs of the OR elements, the OR-NOT element, the inputs which is connected to the outputs of the elements of the group And, and the output with the second inputs of the group of elements OR, the device reset input is connected to the reset input of the group counters.

A disadvantage of the known device is a large cycle time for servicing requests, during which the number of requests of each type will reach its threshold / 4i (is, n), due to the fact that in the absence of unmasked requests, the OR element does NOT generate a single signal that opens a group of AND elements and all masked requests go to the output of the device and increase the value of their counters by one (and for the counters that have reached the threshold, this state is zero) and the mask is removed from those types of interrupts that reach their th threshold. As a result, the servicing of these types of requests reduces the service intensity of those types of requests whose number has not yet reached its threshold, r, (i s, n).

The aim of the invention is to expand the field of application of the device by introducing an absolute priority mode for unblocked requests. When using the proposed

a technical solution can have a positive effect in increasing the service intensity of those types of requests, the number of which has not reached its threshold values by interrupting requests of those priority types, the number of which has reached its threshold values when unlocked requests appear.

The introduction of elements And the second group allows you to skip service interrupt requests of those types whose number has reached the threshold in the absence of interrupt requests of those types that are not

reached its threshold. Entering the second OR-NOT element and the one-shot allows the device installation pulse to be generated if all the meters are blocked. Introducing the OR element allows you to switch the inputs of the initial installation, time installation, and internal installation of the device.

Introducing an OR element into each counter allows generating a request blocking signal when the counter reaches zero, and the AND element allows blocking the subtracting input of the counter when it reaches zero.

FIG. 1 shows functional

control device circuitry; Fig 2 is a functional diagram of the counter.

The device for controlling the interruption (Fig. 1) contains the second group of elements AND 1.1-1.P, the first group of elements AND

2.1-2.P, a group of elements OR 3.1-Z.p, a group of counters 4.1-4.P, the first 5 and second 6 elements OR NOT, an element OR 7, a single vibrator 8, a group of inputs 9 device priority requests, a group inputs 10

masking device priority requests, device output group 11, setup input 12, time setting input 13.

Counter 4.1 (4.2-4.p) contains a counter

14, the element And 15 and the element OR 16 (Fig. 2).

Elements And 1.1-1.l of the second group

designed to pass requests

those types whose number has reached the threshold value. Elements 2.1-2. The first group is intended to pass requests of those types whose number has not reached its threshold value. The elements OR 3.1-З.п are designed for switching interrupt requests.

Counters 4.1-4. N (FIG. 2) are designed to count the number of requests for each type of interrupt. On the falling edge of the pulse of the initial installation arriving at the synchronous inputs of the counters 4.1-4. The counters record the values of the thresholds arriving at the corresponding D inputs. On the falling edge of the interrupt request, counter 4.1-4. P decrease their state by one. While the counter 4.i (is, n is not in the zero state, the element OR 16 generates a single signal at the output. When the zero value, i.e. the threshold, is reached by the counter 14, the element OR 16 forms a zero masking signal at the output of the counter 4.i , which simultaneously closes the AND 15 element, prohibiting the flow of signals to the subtractive input of the counter 14.

The first element OR-NOT 5 is intended for opening AND 1.1-1.P elements in the absence of requests of those types, the number of which has not reached its threshold.

The second element OR-NOT 6 is intended to form the internal signal of the initial installation of the device, if all the counters are 4.1-4.

The element OR 7 is intended for switching the signals of the initial installation of the device, arriving at the inputs 12 and 13, and the signal of the internal installation, generated if all the counters 4.1-4. Have reached their threshold.

A single vibrator 8 is designed to form on the leading edge of the signal from the output of the element OR NOT 6 a pulse of the internal initial setting of the device.

The group of inputs 9 interrupt requests is designed to receive interrupt requests. The group of inputs 10 for marking priority requests is intended for the arrival of external masking signals for interrupt requests. The group of outputs 11 is designed to issue unblocked interrupt requests to the inputs of the priority device. Setup input 12 is designed to start recording threshold values into counters 4.1-4. The time setting input 13 is intended to record the threshold values in the counters 4.1-4. N after a certain time interval has passed.

The counter 14 is designed to count the number of requests and has D inputs, information on which is recorded in the counter 14 on the falling edge of the pulse

on the synchronous input of the counter 14 and the subtracting input, the pulse on which on the falling edge reduces the content of the counter 14 by one.

Element 15 is designed to block the subtracting input of counter 14 when the latter reaches zero. The element IL & 16 is designed to form a blocking zero signal at the output of the counter 4.1 (i s, n) when the counter 14 reaches the zero state and for

control blocking element I.

The interrupt control device operates as follows.

The initial installation of the counters 4.1-4 is made. By applying to the D-inputs the corresponding threshold values fi (is, n) and to the input 12 of the initial setup of a pulse, which records the threshold values / l (is, п) to the corresponding counters 4.1-4. .

When initiating an interrupt i-ro priority request (is, n, where n is the number of interrupt request inputs on i-th input 9, the single request signal passes through AND 2.1 if there is no external masking signal on the i-th interrupt request from input 10.1 and the number of i-ro type of interruption does not exceed its threshold / 4, i.e. from the output of counter 4.1 to the third input of the element I 2, i, a single signal is given.

And 2.1 a single signal passes through the element OR 3.1 and enters the output 11.i of the device. Upon completion of the interrupt request service, the signal from input 9.I is removed and the AL counter decreases its state by

unit

If the number of interrupt requests i-ro type (i s, p) reaches its threshold fi. then the counter 4.i blocks the element AND 2.I and the output of the control device receives

unblocked interrupt requests.

If there are no unblocked requests at the outputs of the AND 2.1-2.P elements, then the OR-NOT 5 element generates a single signal that passes all blocked requests to the output 1 of the device, which arrive at the output of the 11-device, which ensures the maximum utilization rate of the equipment.

When unblocked requests appear, the element OR-NOT 5 generates a zero signal that interrupts the execution of previously blocked requests and exit

11 devices receive only unblocked requests.

The blocking of counters 4 is removed either after the completion of a certain predetermined time interval by applying the pulse time to input 13 of the impulse time, or if all counters 4.1–4.P are blocked. In this case, on the leading edge of the pulse from the output of the OR-NOT 6 element, the single-oscillator 8 forms an internal pulse. In both cases, the pulse passes through the element OR 7 and on the trailing edge writes to the counters 4.1–4. The threshold values / ti - / in. In the future, the device works similarly.

Thus, the proposed device provides the maximum possible utilization rate of the equipment servicing the device by processing in idle modes requests that are blocked due to exceeding their predetermined number, and provides absolute priority to unblocked requests received at its input.

Claims (1)

Claims An interrupt control device comprising a group of n OR elements (n is the number of requests), a first group of n elements AND, an OR NONE element, a group of n counters, the first inputs of the AND elements of the group being a group of device interrupt request inputs , the group of device interrupt request masking inputs is connected to the second inputs of the corresponding AND elements of the first group, the inputs of the element OR are NOT connected to the outputs of the elements AND of the group, characterized in that, in order to expand the scope of application by introducing the absolute priority mode for unblocked requests, the second group of elements AND, the second element OR, the element OR and the one-shot are entered into it , with the first inputs of elements And the second group are a group of device interrupt request inputs, second inputs of elements AND of the second group are connected to a group of inputs of device interception request masking, third inputs of elements AND The second group is connected to the output of the first element OR NOT, the outputs of the elements of the first and second groups are connected respectively to the first and second inputs of the corresponding elements of the OR group, the outputs of the elements OR of the group are connected to the subtractive inputs of the respective counters of the group and are a group of outputs of the device, the outputs of the counters of the group are connected to the inputs of the second element OR NOT and with the third inputs of the corresponding elements AND of the first group, the input of the single-oscillator is connected to the output of the second element OR-NOT, the first input of the element OR is connected to the output of the single-oscillator, the second and third inputs of the OR element are respectively the input of the initial installation and the input of the time setting of the device, the output of the OR element is connected to the synchronous inputs of the group counters, the inputs The installation of the group counters is connected to the threshold inputs of the device. ST sixteen