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Section 1

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Process Management Activities (5)

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6 years ago

Date created

Mar 1, 2020

Cards (30)

Section 1

(30 cards)

Process Management Activities (5)

Front

1) Scheduling of processes and threads 2) Creating/Deleting processes (system and user) 3) Suspending and Resuming processes 4) Process Synchronization 5) Process Communication

Back

UNIX vs LINUX

Front

Unix is a complete OS vs. Linux is just a kernel

Back

Containers

Front

Virtualization in or on-top of OS. Used to create full development environments

Back

Draw the components of a computer system

Front

I/O > System & Application Programs > OS > Hardware

Back

Von Neumann Architecture

Front

Memory holds both data & program. CPU must use bus as communication line between the two.

Back

What is the von Neumann bottleneck?

Front

CPU and Memory sit on opposite sides of a slow bus. Throughput is limited by bus speed

Back

MULTICS

Front

Precursor to Unix. First operating system to integrate securities in its core functions

Back

Asynchronous I/O

Front

Control returns to the user program without waiting for I/O completion

Back

What is the purpose of an OS?

Front

Provide an environment in which a user can execute programs in a convenient and/or efficient manner

Back

What is the kernel responsible for?

Front

1) memory management 2) process/task management 3) disk management

Back

Who built UNIX?

Front

Dennis Ritchie & Ken Thompson

Back

What are the goals of an OS?

Front

1) Execute user programs 2) Make the computer system convenient to use 3) Use computer hardware efficiently

Back

UNIX Definition (3 parts)

Front

1) Kernel 2) Shell 3) Core set of applications (editor, etc.)

Back

Batch Systems (punch-cards)

Front

Program has control over all of the system resources

Back

What does a program running within a Process need?

Front

1) CPU Execution Time (allocation) 2) Memory (for instructions and data) 3) Files 4) I/O Devices (network, keyboards etc.)

Back

To facilitate multi-programming the OS requires:

Front

1) Job scheduling 2) Memory management

Back

Who invented Linux?

Front

Linus Torvalds

Back

Show how a system call works

Front

Back

Definition of a File

Front

The logical unified view of information storage

Back

Virtualization

Front

Multiple OS images sharing the same hardware/computer system

Back

Synchronous I/O

Front

After I/O is requested, wait until I/O is done. Program will be idle.

Back

What does an OS act as?

Front

An intermediary between the user of a computer and the computer hardware

Back

Multi-programming

Front

The technique of keeping multiple programs in main memory at the same time, competing for the CPU

Back

How can we fix the von nuemann bottleneck?

Front

Caches

Back

PC

Front

Single-user Computer System

Back

What is a process?

Front

the unit of work in a system

Back

A process can have 1 or more (concurrent) threads.

Front

1) Each thread has a program counter on a program sequence 2) Each thread is considered a separate execution sequence

Back

What is the kernel of an OS?

Front

- The core of the OS - Connects the system hardware to the application software - EVERY OS has a kernel!!!

Back

What does a File System do? (3)

Front

1) Controls access from multiple users (e.g. read, write, append) 2) Organizes the structure (e.g. directories / subdirectories of files) 3) Interacts with storage device drivers (abstracting details)

Back

Difference between a VM and Container?

Front

VM emulates the hardware and OS, containers just the OS

Back