Advanced Operating Systems
COMP9242 2002/S2
UNSW
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Administration
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Notices
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Course Intro
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Consultations
# On-line Survey (closed)
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Survey Results
Work
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Lectures
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Milestone 0
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Project Admin
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Project Spec
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Project FAQ
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Exam
Documentation
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ASysT Lab
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L4 source browser
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Sulima ISA Simulator
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R4x00 ISA Summary
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MIPS R4700 Reference
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MIPS R4000 User Manual
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Network Driver
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GT64111
Related Info
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Aurema OS Prize
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OS Hall of Fame
History
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2000
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1999
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1998
Staff
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Gernot Heiser
(LiC)
Next:
Spin locks
Up:
10-smp
Previous:
10-smp
Mutual Exclusion Techniques
Disabling interrupts (
CLI
--
STI
).
Unsuitable for multiprocessor systems.
Spin locks.
Busy-waiting wastes cycles.
Lock objects.
Flag indicates object is locked.
Manipulating lock requires mutual exclusion.
Gernot Heiser 2002-10-11