SU894713A1 - Device for monitoring command run - Google Patents

Description

(54) DEVICE FOR MONITORING PROCESS The invention relates to computing technology and may find application in the creation of control devices for multiprocessor and multiprogramming computing systems. A device for controlling the progress of programs is known, containing assembly schemes, a counter, a generator, a comparison circuit, registering valves, monitoring the progress of a program by checking the correctness of the order of execution of control subroutines 1. The disadvantages of such a device are the need for additional memory storing control subroutines and reducing the effective performance of a digital computer by periodically resolving control subroutines. It is also known a program for controlling the course of programs, containing a trigger, an element And and a counter, which is responsible for monitoring the commands of unconditional jumps and linear sections by counting the number of commands on a section and comparing it with a predetermined 2. the use of special commands of two types and constant PROGRAM number of commands in controlled areas leads to significant program costs for organizing control of the program progress, which leads to loss of performance of the DV M and the growth of memory capacity. In addition, such a device does not allow monitoring the course of programs in a digital computer that implements a multi-program mode of digital computer operation. The closest to the proposed is a device for monitoring the progress of programs, exercising time control of the implementation of basic programs, which does not require significant additional time. The basis of the device is a counter, in which, prior to the execution of a program, the additional code of the maximum permissible program execution time is deleted by deleting the old value by a special command. The counting counter input is connected to a time stamp generator. If the execution of the program is not completed within the maximum allowable time, an overflow occurs in the meter, the SIGNSH of which is an error in the execution of the program 3.

A disadvantage of the known device is that it does not allow controlling the course of programs in multiprogram and multiprocessor modes of operation of a digital computer. Indeed, when implementing these modes, it is necessary to interrupt the executed programs and, therefore, remember the remaining time of the interrupted program execution, and then when resuming its execution, restore it. The known device does not allow this.

The purpose of the invention is to expand the functionality by ensuring the storage and recovery of codes for the remaining execution time of interrupted programs.

The goal is achieved by the fact that the device for controlling the program run, which contains the first counter and the pulse generator, which is connected to the summing input of the first counter, and the overflow output of the first counter, is the controlling output of the device, additionally entered K registers, To input blocks of AND elements , To the output blocks of the elements And, the second counter, the first and second decoders, a block of elements OR, the first, and the second elements OR, and the information inputs of the device are connected to the first input of the block of elements IL The outputs of which are connected to the information inputs of the first counter, the information outputs of the first counter are connected to the inputs To the input blocks of the elements And, the outputs To the input blocks of the elements And are connected to the information inputs of the corresponding registers, the output of each register is connected to the input of the corresponding output block And, the outputs To output blocks of elements AND are connected to the second input of the block of elements OR, information outputs of the second counter are connected to the inputs of the first and second decoders, outputs cat through the first and second elements OR are connected respectively to the summing and subtracting inputs of the second counter, each K-th output of the first and second decoders is connected respectively to the control inputs of the K-th input block of the elements And and the K-th output; Both the first and second control inputs of the device are connected, respectively, with the clock inputs of the first and second decoders.

The drawing shows a device for monitoring the progress of the Programs, a functional diagram.

The device contains the first counter 1, the summing input of which is connected to the output of the generator 2 pulses, and the overflow output is connected to the control output of the device 3. Additionally, the device is equipped with K registers 4, K input 5 and K output 6 blocks of elements And, second counter 7, first and the second decoders 8 and 9, a block of elements OR 1 and two elements OR 11 and 12.

Each K-th input of the first element OR 11 is connected to the K-th output of the first decoder 8 and to the control inputs of the K-th block of input elements I 5, the control inputs of the output elements And b of the K-th block are connected to the K-MU output of the second d the encoder 9 and the K-th input of the second element OR 12, the output of which is connected to the subtractive input 13 of the second counter 7, the summing input 14 of which is connected to the output of the first element OR 11, and the outputs are connected to the information inputs of the first 8 and second 9 decoders, clock inputs 15 and 16 of which are connected respectively Actually, to the first 17 and to the second 18 control inputs of the device, the outputs of all K blocks of output elements AND b through the block of elements OR 10, the second inputs of which are connected to the information inputs 19 of the device, are connected to the inputs of counter 1, the outputs of which are connected to the information inputs of the block input elements And 5.

The device works as follows.

At each program execution, the meter 1 is programmatically entered through 11 information inputs 19 of the device and 5 blocks of elements OR 10 additional CODE of the maximum program execution time. In the process of executing a program, time impulses from a generator 2 of impulses of time stamps arrive at the summing input of counter 1. If the program execution time exceeds the maximum allowable, then counter 1 generates an overflow signal, which through control output 3 of the device enters the interrupt system. In the normal course of the program, overflow of the counter 1 does not occur. However, even during the normal course of a program during a multiprogram mode of operation, this program may be interrupted due to the need to execute programs of higher priority. In this case, it naturally becomes necessary to memorize and restore the remaining execution time of interrupted programs. The number of programs that can simultaneously | BUT be in interrupt mode is usually called the interrupt depth.

Claims (3)

1.Cl mko E.I. Schematic and test control of automatic digital computers. M., Soviet Radio, 1963, p. 86-87, fig. 14. 2. In the same place 58-59, fig. 6 five 3. Ibid, p. 91-92, fig. 8.4 (prototype).