. - 3GL   - 4GL   DB-

, multitasking , ( ) . .

, , .

, . :

  1. , , . .

  2. C
  3. , , .

    , , (, S-DOS shell S-DOS 5.0 , . , . , .

  4. ( )

, . . .

. ( ) ( ). .

. (. multithread) , .

,

(multi-process) . (multi-threaded) . .

, . , , . , :

(thread) , . - , , .

, -, , SMT

(M. Flynn)

( SISD, Single Instruction stream over a Single Data stream).

(SIMD, Single Instruction, Multiple Data ).

(MISD, Multiple Instruction Single Data ).

(MIMD, Multiple Instruction Multiple Data).

. (SISD , ).

, () . , . , , , , . . .

"" ... . , , . , . , . :

. , , , . , , (""), . .

, : nd/(n+d)

n - , , d - . 200 , . (200*5)/(200+5)=4.88. , , , , , "" .. , , .

, . , .

IBM RISC/6000. 62.5 , 104 Mflop (Mflop - - ). , .

, (SIMD ). , . . , 1980- 1990-. .

(SMT simultaneous multithreading) , , , .

. SMT ( ), . SMT , , , . , , .

NUMA

, , . : , ( 80286 ).

.

, 24 , , . , , .

16 . . . 8 , . , , .

, , , , .

, . -SO, -SI, M/-IO, ( , /, , , ). , .

, , , . 4 CLK, 2 (.. 2 CLK). , , 4s 0, , . , . , ,

4c 0 (.. CLK), . , . () .

, , CLK, 20 , (20/4) , 10 /. .

C (. Symmetric Multiprocessing, SMP) , . SMP. SMP , ; , SMP . , , , . SMP , .

SMP ; NUMA, .

NUMA, Non-Uniform Memory Architecture ) , , .

NUMA , .

, , . NUMA .

NUMA , . , NUMA- , - , ccNUMA.

, , ( ). , NUMA , . NUMA , , .

    . - 3GL   - 4GL   DB-


, , Class - - , , .




 10.11.2021 - 12:37: - Personalias -> WHO IS WHO - - _.
10.11.2021 - 12:36: - Conscience -> . ? - _.
10.11.2021 - 12:36: , , - Upbringing, Inlightening, Education -> ... - _.
10.11.2021 - 12:35: - Ecology -> - _.
10.11.2021 - 12:34: , - War, Politics and Science -> - _.
10.11.2021 - 12:34: , - War, Politics and Science -> . - _.
10.11.2021 - 12:34: , , - Upbringing, Inlightening, Education -> , - _.
10.11.2021 - 09:18: - New Technologies -> , 5G- - _.
10.11.2021 - 09:18: - Ecology -> - _.
10.11.2021 - 09:16: - Ecology -> - _.
10.11.2021 - 09:15: , , - Upbringing, Inlightening, Education -> - _.
10.11.2021 - 09:13: , , - Upbringing, Inlightening, Education -> - _.
Bourabai Research -  XXI Bourabai Research Institution