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Operating Systems - CS
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Class notes for the Course "Operating Systems".
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2024 Exam Success with the [Operating System Concepts, Silberschatz,9e] Test Bank
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Conquer Your Course with the [Operating System Concepts, Silberschatz,9e] 2024 Test Bank
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OPERATINGOperating
SYSTEMS Systems
By: LAMA SHAWAHNY •
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, syllabus
c
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y
, LECTURE 1
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control Unit
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rice.
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printer
Registers
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Devices
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control "
t
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storage
BUS
Good CPU
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omicron
central processing Unit
Interrupts -
Inturpt am
to ① dat We
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pc -
program counter
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Interrupt a ⇐ in
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OS
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Provides
• Support many devices simultaneously
stable: doesn’t crash
portable: can run code on more e.g. keyboard, mouse, printer, speakers,
than microphone
one type of machine • Share resources among users and
reliable: always reacts in the programmes fairly: each programme gets a
same way change to run safely: protects against
safe: doesn’t do dangerous corruption .
well-behaved: acts in a proper
efficiently: using the available resources to
manner environment
• Computer “appears” to more provide the best service possible
than it is “appears” to be many • Allocates resources to users
processors “appears” to be many, Disks, memory, network interfaces, timers,
large memories terminals/displays, laser printers, etc Who’s
• Features: using what?
threads, processes, files, How is it shared?
communication channels
, and I/O
processing
D- core 2 Is on NH CPU ☒a Dori
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had Dorne AND Ham 2
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core 1 0% thread 1 doz 7%0 ☒I 23N Tss Dd ne th
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