... System Calls 62
2.4 Types of System Calls 66
2.5 System Programs 74
2.6 Operating- System Design and
Implementation 75
2.7 Operating- System Structure 78
2.8 Operating- System Debugging 86
2.9 Operating- System ... multiprogramming system.
1.4 Operating- System Structure
Now that we have discussed basic computer -system organization and archi-
tecture, we are ready to talk about operating systems. An operating system
provides ... 1 Introduction
1.1 What Operating Systems Do 4
1.2 Computer -System Organization 7
1.3 Computer -System Architecture 12
1.4 Operating- System Structure 19
1.5 Operating- System Operations 21
1.6...
... Mainframe Systems
■ Desktop Systems
■ Multiprocessor Systems
■ Distributed Systems
■ Clustered System
■ Real -Time Systems
■ Handheld Systems
■ Computing Environments
Silberschatz, Galvin and Gagne ... the Apple Macintosh Operating System.
v
Silberschatz, Galvin and Gagne 2002
1.19
Operating System Concepts
Real-Time Systems
■ Often used as a control device in a dedicated application
such ... Output
Silberschatz, Galvin and Gagne 2002
1.23
Operating System Concepts
Computing Environments
■ Traditional computing
■ Web-Based Computing
■ Embedded Computing
Silberschatz, Galvin and Gagne...
...
hiện được cấp k thể hiện của loại tài nguyên R
j
.
Need: một ma trận n x m; Need[ i, j ] = k, P
i
có thể cần
thêm k thể hiện của R
j
.
Need[ i, j ] = Max[ i,j ] – Allocation [ i, j ].
1) ... sau:
Available := Available – Request
i
;
Allocation
i
:= Allocation
i
+ Request
i
;
Need
i
:= Need
i
– Request
i
;
Nếu kết quả trạng thái cấp phát tài nguyên là an toàn,
thì giao dịch ... vector yêu cầu cho P
i
. Nếu Request
i
[j] = k, P
i
muốn k thể hiện của Rj.
1) Nếu Request
i
≤ Need
i
, di chuyển tới bước 2. Ngược lại,
phát sinh một điều kiện lỗi vì quá trình vượt quá yêu
cầu...
... limited sections of the system rather than touching all sections of the operating
system. Information is kept only where it is needed and is accessible only within a defined
and restricted area, ... (security) system?
Answer: By establishing a set of privileged instructions that can be executed only when
in the monitor mode, the operatingsystem is assured of controlling the entire system at ... inspected to ensure that data have not
been corrupted in transit. All data on media must be checked to be sure they have not
changed since they were written to the media. At the software level, media...
... C.40
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Feb 11, 2005
Mirror Set on Two Drives
Mirror Set on Two Drives
C.12
Silberschatz, Galvin and Gagne â2005
Operating ... protocols as drivers that can be loaded
and unloaded from the system dynamically
C.47
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Feb 11, 2005
Networking
Networking ... restored to
a consistent state by processing the log records
C.11
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Feb 11, 2005
Kernel
Kernel
—
—
Scheduling
Scheduling
...
... 2.29
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Jan 14, 2005
Layered Operating System
Layered Operating System
2.24
Silberschatz, Galvin and Gagne â2005
Operating ... Chapter 2
2.4
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Jan 14, 2005
Operating System Services
Operating System Services
One set of operating- system services ... â2005
Operating SystemConcepts 7
th
Edition, Jan 14, 2005
API
API
–
–
System Call
System Call
–
–
OS Relationship
OS Relationship
2.42
Silberschatz, Galvin and Gagne â2005
Operating System Concepts...
... â2005
Operating SystemConcepts - 7
th
Edition, Feb 7, 2006
Addition of Medium Term Scheduling
Addition of Medium Term Scheduling
3.16
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts ... 3.4
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts - 7
th
Edition, Feb 7, 2006
Process in Memory
Process in Memory
3.39
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts ... 3.12
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts - 7
th
Edition, Feb 7, 2006
Representation of Process Scheduling
Representation of Process Scheduling
3.42
Silberschatz, Galvin...
... 4.9
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
edition, Jan 23, 2005
Many
Many
-
-
to
to
-
-
One Model
One Model
4.15
Silberschatz, Galvin and Gagne â2005
Operating System ... (process)
4.3
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
edition, Jan 23, 2005
Single and Multithreaded Processes
Single and Multithreaded Processes
4.14
Silberschatz, Galvin ...
thread immediately
z Deferred cancellation allows the target thread to
periodically check if it should be cancelled
4.26
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
edition,...
... 6.32
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Feb 8, 2005
Schematic view of a Monitor
Schematic view of a Monitor
6.39
Silberschatz, Galvin and Gagne â2005
Operating ... full initialized to the value 0
Semaphore empty initialized to the value N.
6.24
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition, Feb 8, 2005
Bounded Buffer Problem ... is
incremented by the producer after it produces a new
buffer and is decremented by the consumer after it
consumes a buffer.
6.37
Silberschatz, Galvin and Gagne â2005
Operating SystemConcepts 7
th
Edition,...