praktikum - pengenalan os.pptx

8/10/2019 PRAKTIKUM - PENGENALAN OS.pptx

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SISTEM OPERASISO0Author : Reza Taqyuddin


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What is Operating System?

A program that manages a computers hardware.

Sebush ptogram yang mengatur perangkat lunak komputer

Provides a basis for application programs

Basis untuk program aplikasi

Acts as an intermediary between the computer user and thehardware

Bekerja sebagai penghubung Antara pengguna komputer dan

komputer.


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Komponen Sistem Komputer


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KERNEL - merupakan satu program yang berjalan sepanpada computer

bersama dengan kernel, ada dua tipe program:

1. system programs, which are associated with the op

but are not necessarily part of the kernel, and

1. Sistem program yang mana berasosiasi dengan sistem

tidak bagian dari kernel, dan

2. application programs, which include all programs nwith the operation of the system

1. Program aplikasi yan mana termasuk seluruh program

tidak ber-apa dengan sistem operasi,

Mobile operating systems often include not only a core kmiddleware

Middleware - a set of software frameworks that provide aservices to application developers.


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Process

Process is a program in execution

A process is more than the program code, which is sometimethe text section

It also includes the current activity, as represented by the valprogram counter and the contents of the processors register

stack, which contains temporary data (such as function, para

addresses, and local variables), and a

data section, which contains global variables.

A process may also include a heap,which is memory that is dallocated during process run time.


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State

A process may be in one of the followingstates:

New. The process is being created.

Running. Instructions are beingexecuted.

Waiting. The process is waiting forsome event to occur (such as an I/Ocompletion or reception of a signal).

Ready. The process is waiting to be

assigned to a processor.

Terminated. The process has finishedexecution.


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Process Creation

During the course of execution, a processmay create several new processes.

the creating process is called a parentprocess, and

the new processes are called the childrenof that process.


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Scheduling

process scheduler selects anavailable process (possibly from aset of several available processes)for program execution on theCPU

As processes enter the system,they are put into ajob queue,

While waiting for execution theyare put into a ready queue

While trying to use I/O of disk theyare put into a Device queue


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Process Interaction

Why?

Information Sharing

Computation Speed up

Modularity

Convenience

Cooperating processes require an interprocess communicatimechanism that will allow them to exchange data and inform

Model : shared memory and message passing


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Process Communication require

Naming

Synchronization

Buffering


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Tugas 1

1. Jelaskan Proses yang terjadi pada saat instalasi linux hingga

desktop. Berdasarkan konsep process

2. Buat dalam bentuk makalah per kelompok

3. Penilaian berdasarkan informasi yang tertera dalam makalasistematika penulisan.

4. Cetak, dan dikumpul setelah UTS


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Selamat UTS

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