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Chöông 3 ÑÒNH THÔØI BOÄ XÖÛ LYÙ

CHÖÔNG 3 : ÑÒNH THÔØI BOÄ XÖÛ LYÙ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

BAØI TOAÙN ÑÒNH THÔØI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CAÙC THUAÄT NGÖÕ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MUÏC TIEÂU ÑÒNH THÔØI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TIEÂU CHÍ ÑEÅ ÑÒNH THÔØI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TIEÂU CHUAÅN ÑAÙNH GIAÙ GIAÛI THUAÄT ÑÒNH THÔØI ,[object Object],[object Object],[object Object],[object Object],[object Object]

BOÄ ÑÒNH THÔØI VAØ BOÄ ÑIEÀU VAÄN ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

BOÄ ÑÒNH THÔØI QUAÙ TRÌNH JOB QUEUE READY QUEUE CPU I/O WAITING QUEUE enter end High-level scheduler Low-level scheduler

MOÄT SOÁ GIAÛI THUAÄT ÑÒNH THÔØI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ÑÒNH THÔØI HAÏN CHOÙT (Deadline Scheduling) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FIFO ( First In First Out ) ,[object Object],[object Object],[object Object],[object Object],[object Object],Processor

VÍ DUÏ 1 : GIAÛI THUAÄT FIFO ,[object Object],[object Object],[object Object],[object Object],0 24 29 31 2 P3 5 P2 24 P1 Thôøi gian thöïc thi (giaây) Quaù trình P3 P2 P1

VÍ DUÏ 1 : GIAÛI THUAÄT FIFO ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SJF ( Shortest Job First ) ,[object Object],[object Object],[object Object],Processor Min time

VÍ DUÏ 2 : GIAÛI THUAÄT SJF ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],0 7 9 13 P1 P2 P3 Ñònh thôøi laïi 5 1 0 Thôøi gian ñeán 2 P3 4 P2 7 P1 Thôøi gian thöïc thi (giaây) Quaù trình P2 P3 P1

SRT ( Shortest Remaining Time ) ,[object Object],[object Object],[object Object],Processor Min remaining time

VÍ DUÏ 3 : GIAÛI THUAÄT SRT ,[object Object],[object Object],[object Object],[object Object],P1 P2 P3 Ñònh thôøi laïi 5 3 0 Thôøi gian ñeán 2 P3 2 P2 7 P1 Thôøi gian thöïc thi (giaây) Quaù trình P3 P1 P2 P1

RR( Round Robin ) ,[object Object],[object Object],Processor q

VÍ DUÏ 4 : GIAÛI THUAÄT RR ,[object Object],[object Object],[object Object],P1 P2 P3 Ñònh thôøi Round robin vôùi Quantum time laø 1 giaây 0 3 5 7 5 3 0 Thôøi gian ñeán 2 P3 2 P2 7 P1 Thôøi gian thöïc thi (giaây) Quaù trình

HRRN ( Highest Response Ration Next ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

VÍ DUÏ 5 : GIAÛI THUAÄT HRRN ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],0 7 11 13 P1 P2 P3 Ñònh thôøi laïi 5 1 0 Thôøi gian ñeán 2 P3 4 P2 7 P1 Thôøi gian thöïc thi (CPU burst time) (giaây) Quaù trình P3 P2 P1

HAØNG ÑA MÖÙC HOÀI TIEÁP ( Multilevel Feedback Queue ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],HAØNG ÑA MÖÙC HOÀI TIEÁP ( Multilevel Feedback Queue ) … Processor q 1 q 2 q n

3.chap3 sched

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Editor's Notes