SU1443007A1 - Device for solving problems of scheduling theory - Google Patents

Abstract

The invention relates to computing, can be used to solve scheduling problems, and minimizes the total execution time of technologically dependent tasks. The device contains a synchronization block 1, a counter 2, a memory block 3, a group of P is accumulated x adders 4, where P is the number of performers of the same type between which they are distributed - task 5, block 6 for selecting the maximum code, block 7 for selecting minimum code, block 8 priorities, a group of P elements AND 9, the switch 10, the element OR 11. In addition, in FIG. 1 digital symbols have input 12 of the device setup, input 13 for setting the device operation mode, output 14 for the device setting number, output 15 for setting the device execution time, outputs 16 for signs of assigning tasks for the performers, output 17 for the sign of the device’s end on the fifth outputs .18–22, the synchronization unit, the start-up input 23 of the device. Before starting work, the duration of the execution of tasks is recorded in memory block 3. Further, according to the signals with the output 18-22 of the synchronization unit 1, the execution time of the tasks is sequentially counted from the memory block 3 and the corresponding tasks are assigned to the executors taking into account the tasks assigned to them in the preceding work cycles. 2 Il. (L 4 4ib SAR

Description

The invention relates to computing and can be used to optimize the schedules for the execution of technologically dependent tasks by the same type of executors.

The purpose of the invention is to expand the functionality of the device by solving the problem of minimizing the total execution time of technologically dependent tasks.

Fig, I presents the functional diagram of the device; in fig. 2- timing diagram of the synchronization unit.

The device contains a synchronization block J, a counter 2, a memory block 3, a group of P accumulating adders 5 where P is the number of performers of the same type between which tasks are distributed, key 5} maximum code selection block 6, minimum code selection block 7, block 8 priorities, a group of P elements AND 9, switch 10, element OR 11.

In addition, input 12 of the initial installation of the device, input 13 of setting the device operation mode, input 14 of the device setting number, output 15 of the device execution execution time assignment 15, outputs 16 of the signs of assigning assignments to the performers, output 17 of the first device on the fifth outputs 18-22 of the synchronization unit 1, the start-up input 23 of the device.

The device works in the following way.

Suppose that within each of the three different technological processes it is necessary to perform three tasks with a task execution time of 5.3.7 (units of time) for the first process, 8.1.3 for the second and 4.6.2 for the third with two forces () of the same type of performers (for example, MEM). At the same time, the assignment of various technological processes cannot be performed simultaneously. Before the start of work, the tasks execution time within the framework of each technological process is arranged according to the non-increase in the time of their execution and entered into memory block 3 in such a way that the numbers 0, l, ..., j, 8 are respectively 7.5.3 ; 8,3,1 and

6,4,2. Thus, at the same time, each task is assigned a number equal to the address at which in block 3

The memory recorded the execution time of the task. Moreover, the number of tasks in each of the technological process should be the same. Otherwise the technological processes

with a smaller number of tasks are supplemented with fictitious tasks with zero execution time to their number ;; - in the technological process with the maximum number of tasks.

The input 12 of the beginning: installation of the device gives a pulse signal of a unit level, sets counter 2 to zero, closes the information circuit of the key 5, all adders 4 embed, Device 1 triggers a pulse signal at the start 23 the synchronization starts-generating a pulse train

provided by the timeline of his work.

A single unit pulse signal appears at output 18 of unit I. In this case, code number 7 is read from memory block 3 (maximum duration of the task of the first technological process). After a time T1 sufficient to select the number 7 from memory block 3 , the synchronization unit I generates a pulse at the output 19. At the same time, at the first output 16, the indication of assigning the task to the first performer is formed and the code of the number 7 is summed with the contents of the first accumulating adder 4 (since the latter stores the smallest code and has the highest priority th). After time T2, which is sufficient for recording information into adder 4 and processing by the executor of the assignment characteristic, synchronization unit 1 resets the signals at outputs 8 and 19 and generates a pulse signal of a unit level at output 20,

this at the output of the counter adds one to the current value. After a TOR time sufficient to add one, the block resets the signal at output 20 and generates a single level signal at output 18. Next, the device operates in a similar way, and the second and third largest assignments are assigned to the second performer. However, after ka collected

A signal is output at output 20 (after the assignment of the third work to the second performer), the synchronization unit 1 generates a pulse signal of a single level at output 21. At the same time, the device will issue the performers the indication of issuing the maximum execution time of the assigned tasks and the time of execution of the tasks at the device 15 output.

Through the time TA, sufficient for processing by the executors of the sign of issuing the execution time, synchronization unit 1 resets the signal at output 21 and generates a pulse signal of a single level at output 22. At the same time, all accumulating adders A of group- are wrapped ( the prohibition of simultaneous execution of tasks of various technological processes, before starting work, a pulse signal of a single level is fed to the input 13 of the device operation mode setting, and the information circuit of the key 5 j and signal is opened lu output 22 of block 1 zeroing accumulator 4 occurs). After a time T5, sufficient for setting zero of adders A, synchronization block 1U1I removes the signal from output 22 and generates a pulse signal of a unit level at output 18,

Further, the operation of the device is repeated. After all the tasks have been distributed, the counter 2 overflows, the overflow signal stops the synchronization unit 1 and enters the output 17 of the device as a sign of the end of the device’s operation,

In the presented example, tasks with a duration of 7.8.6 units of time are assigned to the first executor. The second task with duration is 5,3,3,1,4,2 (in that case, if the tasks of different technological processes can be performed simultaneously, they are distributed between two performers as follows: 7.8 4 to the first performer and 5,3,3,1,6,2 to the second performer),

Memory unit 3 can be executed in the form of a matrix of registers.

Claims (1)

Invention Formula A device for solving scheduling theory problems, containing a block pa LLP07 m, a block for selecting the maximum code, a group of P accumulating adders, where P is the number of performers of the same type between which tasks are assigned, and a synchronization unit whose start input is a device start input, characterized in that Q decoupling the functionality of the device by solving the problem of minimizing the total execution time of technologically dependent sets of work, an element OR 15, a counter, a key, a minimum code selection block, a priority block, a group of P elements are entered into it And And the switch, moreover, the device initial setup input is connected to the key disconnect input 20, to the first input of the OR element, and to the installation input on the O counter, whose information output is the device job number output and connected to the address of the memory block the output of which is connected to the inputs of the summand of all accumulating adders of the group, the output of the K-th accumulating group adder (К 1 ,, ,,,, Р) is connected to the K-m information inputs of the switch, the block for selecting the maximum code and the block for selecting the minimum code , th output of the position of the minimum code of which is connected to the K-th input of the priority block 25, the K-th output of the position of the signal with the highest priority of which is connected to the first input of the K-th element AND group, the output of which is the output of the assignment sign - 4Q to the device's executive and is connected to the input of the sign of the K-th accumulating group adder, the K-th output of the position of the maximum code of the block of selection of the maximum 45 code is connected to the K-th control input of the switch, the output of which is the output of time assignment According to the device, the first output of the synchronization unit is connected to the input of the read attribute of the memory unit, the second output of the synchronization unit is connected to the second inputs of all elements of the group, the third input of the synchronization unit is connected to the reading output of the counter, the output of the overflow indication is output the sign of the end of the operation of the device and connected to the stop input of the synchronization unit, the fourth 50   14430076 the output of which is the output of which is connected to the input of the execution time of the task setting in O of all accumulating devices, the fifth output of the synchronization unit is connected to the information adders of the group, the input of the job setting mode of the device is connected to the output of which is connected to the inputs of the installation in O of all accumulating group adders, the device operation input is connected to the input the input key, the output of which is connected to the. second input of the element IL, do enable key.