Задача 1

Моделирование системы

mem STORAGE 8

expon FUNCTION RN1,C12

0,0/.2,.22/.4,.51/.5,.69/.6,.92/.7,1.2/.8,1.61/

.9,2.3/.95,3/.99,4.6/.999,6.9/1,100

GENERATE 8,6,,100

QUEUE och1

ENTER mem

DEPART och1

met3 QUEUE och2

TRANSFER BOTH,met2,met1

met1 SEIZE cpu2

DEPART och2

ADVANCE 2,FN$expon

RELEASE cpu2

TRANSFER,met4

met2 SEIZE cpu1

DEPART och2

ADVANCE 5,FN$expon

RELEASE cpu1

met4 TRANSFER.4,met5,met6

met5 QUEUE och3

SEIZE disk

DEPART och3

ADVANCE 5,3

RELEASE disk

TRANSFER,met3

met6 LEAVE mem

TERMINATE 1

Печать отчета

START TIME END TIME BLOCKS FACILITIES STORAGES

0.000 797.125 24 3 1

NAME VALUE

CPU1 10004.000

CPU2 10007.000

DISK 10006.000

EXPON 10001.000

MEM 10000.000

MET1 7.000

MET2 12.000

MET3 5.000

MET4 16.000

MET5 17.000

MET6 23.000

OCH1 10002.000

OCH2 10003.000

OCH3 10005.000

LABEL LOC BLOCK TYPE ENTRY COUNT CURRENT COUNT RETRY

1 GENERATE 100 0 0

2 QUEUE 100 0 0

3 ENTER 100 0 0

4 DEPART 100 0 0

MET3 5 QUEUE 245 0 0

6 TRANSFER 245 0 0

MET1 7 SEIZE 121 0 0

8 DEPART 121 0 0

9 ADVANCE 121 0 0

10 RELEASE 121 0 0

11 TRANSFER 121 0 0

MET2 12 SEIZE 124 0 0

13 DEPART 124 0 0

14 ADVANCE 124 0 0

15 RELEASE 124 0 0

MET4 16 TRANSFER 245 0 0

MET5 17 QUEUE 145 0 0

18 SEIZE 145 0 0

19 DEPART 145 0 0

20 ADVANCE 145 0 0

21 RELEASE 145 0 0

22 TRANSFER 145 0 0

MET6 23 LEAVE 100 0 0

24 TERMINATE 100 0 0

FACILITY ENTRIES UTIL. AVE. TIME AVAIL. OWNER PEND INTER RETRY DELAY

CPU1 124 0.708 4.553 1 0 0 0 0 0

DISK 145 0.924 5.079 1 0 0 0 0 0

CPU2 121 0.300 1.975 1 0 0 0 0 0

QUEUE MAX CONT. ENTRY ENTRY(0) AVE.CONT. AVE.TIME AVE.(-0) RETRY

OCH1 9 0 100 81 0.802 6.392 33.643 0

OCH2 3 0 245 218 0.066 0.215 1.950 0

OCH3 7 0 145 8 3.185 17.509 18.531 0

STORAGE CAP. REM. MIN. MAX. ENTRIES AVL. AVE.C. UTIL. RETRY DELAY

MEM 8 8 0 8 100 1 5.183 0.648 0 0

Измененная модель

mem STORAGE 8

expon FUNCTION RN1,C12

0,0/.2,.22/.4,.51/.5,.69/.6,.92/.7,1.2/.8,1.61/

.9,2.3/.95,3/.99,4.6/.999,6.9/1,100

GENERATE 2,FN$expon,,500

TEST LE Q$och1,5,met7

QUEUE och1

ENTER mem

DEPART och1

met3 QUEUE och2

TRANSFER BOTH,met2,met1

met1 SEIZE cpu2

DEPART och2

ADVANCE 2,FN$expon

RELEASE cpu2

TRANSFER,met4

met2 SEIZE cpu1

DEPART och2

ADVANCE 5,FN$expon

RELEASE cpu1

met4 TRANSFER.4,met5,met6

met5 QUEUE och3

SEIZE disk

DEPART och3

ADVANCE 5,3

RELEASE disk

TRANSFER,met3

met6 LEAVE mem

TERMINATE 1

met7 QUEUE tmp

DEPART tmp

TERMINATE 1

Печать отчета

START TIME END TIME BLOCKS FACILITIES STORAGES

0.000 1156.537 28 3 1

NAME VALUE

CPU1 10004.000

CPU2 10005.000

DISK 10007.000

EXPON 10001.000

MEM 10000.000

MET1 8.000

MET2 13.000

MET3 6.000

MET4 17.000

MET5 18.000

MET6 24.000

MET7 26.000

OCH1 10002.000

OCH2 10003.000

OCH3 10006.000

TMP 10008.000

LABEL LOC BLOCK TYPE ENTRY COUNT CURRENT COUNT RETRY

1 GENERATE 500 0 0

2 TEST 500 0 0

3 QUEUE 166 0 0

4 ENTER 166 0 0

5 DEPART 166 0 0

MET3 6 QUEUE 399 0 0

7 TRANSFER 399 0 0

MET1 8 SEIZE 217 0 0

9 DEPART 217 0 0

10 ADVANCE 217 0 0

11 RELEASE 217 0 0

12 TRANSFER 217 0 0

MET2 13 SEIZE 182 0 0

14 DEPART 182 0 0

15 ADVANCE 182 0 0

16 RELEASE 182 0 0

MET4 17 TRANSFER 399 0 0

MET5 18 QUEUE 233 0 0

19 SEIZE 233 0 0

20 DEPART 233 0 0

21 ADVANCE 233 0 0

22 RELEASE 233 0 0

23 TRANSFER 233 0 0

MET6 24 LEAVE 166 0 0

25 TERMINATE 166 0 0

MET7 26 QUEUE 334 0 0

27 DEPART 334 0 0

28 TERMINATE 334 0 0

FACILITY ENTRIES UTIL. AVE. TIME AVAIL. OWNER PEND INTER RETRY DELAY

CPU1 182 0.773 4.909 1 0 0 0 0 0

CPU2 217 0.384 2.048 1 0 0 0 0 0

DISK 233 0.993 4.927 1 0 0 0 0 0

QUEUE MAX CONT. ENTRY ENTRY(0) AVE.CONT. AVE.TIME AVE.(-0) RETRY

OCH1 6 0 166 15 4.930 34.348 37.760 0

OCH2 3 0 399 342 0.115 0.334 2.339 0

OCH3 7 0 233 2 5.433 26.967 27.201 0

TMP 1 0 334 334 0.000 0.000 0.000 0

STORAGE CAP. REM. MIN. MAX. ENTRIES AVL. AVE.C. UTIL. RETRY DELAY

MEM 8 8 0 8 166 1 7.698 0.962 0 0

Результат

		Начальная модель	Измененная модель
Коэффициент использования оборудования	CPU 1	70.8%	77.3%
CPU2	30%	38.4%
DISK	92.4%	99.3%
Среднее время нахождения транзакта в системе	CPU 1	4.553	4.909
CPU2	1.97	2.048
DISK	5.079	4.927
Средняя длина очереди	OCH1	0.802	4.930
OCH2	0.066	0.115
OCH3	3.185	5.433
Максимальная длина очереди	OCH1
OCH2
OCH3
Среднее время нахождения в очереди	OCH1	6.392	34.348
OCH2	0.215	0.334
OCH3	17.509	26.967

ЗАДАЧА 2