CENG334 Introduction to Operating Systems
... e.g., Access to unallocated memory address crashes only the program, not the whole system Segmentation fault – core dumped ...
... e.g., Access to unallocated memory address crashes only the program, not the whole system Segmentation fault – core dumped ...
SCADA Systems
... Inter-task synchronization and communication – Kernel Task scheduling – micro-kernel Tread/task control, block management – nano-kernel All 3 lower levels may be realized by kernel, but these functions may be split on different levels. When threads are created, Thread Control Blocks are associated w ...
... Inter-task synchronization and communication – Kernel Task scheduling – micro-kernel Tread/task control, block management – nano-kernel All 3 lower levels may be realized by kernel, but these functions may be split on different levels. When threads are created, Thread Control Blocks are associated w ...
CENG334 Introduction to Operating Systems
... e.g., Access to unallocated memory address crashes only the program, not the whole system Segmentation fault – core dumped ...
... e.g., Access to unallocated memory address crashes only the program, not the whole system Segmentation fault – core dumped ...
system call
... As we saw last week in a operating system programs are not allowed direct access to any of the resources except CPU and memory and even then the use has limits placed on it. Thus 1. OS handles requests from programs for various resources to do things e.g. input or output something and enforces the l ...
... As we saw last week in a operating system programs are not allowed direct access to any of the resources except CPU and memory and even then the use has limits placed on it. Thus 1. OS handles requests from programs for various resources to do things e.g. input or output something and enforces the l ...
Introduction
... has a GID (Group IDentification). • The superuser (root in UNIX) has special privilege to violate many of the protection rules. • In UNIX, use the command ‘ps’ to know the process status. ...
... has a GID (Group IDentification). • The superuser (root in UNIX) has special privilege to violate many of the protection rules. • In UNIX, use the command ‘ps’ to know the process status. ...
Chapter 1 Basic Concepts of Operating Systems
... Jobs and Processes A job is a unit of work submitted by a user to the operating system. A typical job consists of the parts listed below: – A sequence of commands to the operating system – A program either in a source language or in binary form – A set of input data used by the program when it exec ...
... Jobs and Processes A job is a unit of work submitted by a user to the operating system. A typical job consists of the parts listed below: – A sequence of commands to the operating system – A program either in a source language or in binary form – A set of input data used by the program when it exec ...
accounting for managers - Pailan College of Management and
... Course to be covered 7.1 Basic concepts of security Different kinds of threats Security principle Types of authentication Formal models of protection worms and viruses ...
... Course to be covered 7.1 Basic concepts of security Different kinds of threats Security principle Types of authentication Formal models of protection worms and viruses ...
1.2 Operating System Structure
... • To overcome the issue of monolithic architecture by grouping components that performs similar functions into layers • Each layer communicates with those above and below it. • Lower-level layers provide services to higher-level layer using interfaces that hide their implementation • Layer OS are mo ...
... • To overcome the issue of monolithic architecture by grouping components that performs similar functions into layers • Each layer communicates with those above and below it. • Lower-level layers provide services to higher-level layer using interfaces that hide their implementation • Layer OS are mo ...
PPT 02 - Mesa Community College
... Describe the functions of an operating system (OS) Describe the components of a personal computer operating system Describe various operating system user interfaces Describe the OS Management Functions Describe the differences among multiprocessing, multiprogramming, and time-sharing List several fu ...
... Describe the functions of an operating system (OS) Describe the components of a personal computer operating system Describe various operating system user interfaces Describe the OS Management Functions Describe the differences among multiprocessing, multiprogramming, and time-sharing List several fu ...
LECTURE 33 APPLICATION I/O INTERFACE
... Commands/calls include read, write, seek Access is typically through a file-system interface Raw I/O or file-system access - “binary xfr” of file data - interpretation is in application (personality of file lost) Memory-mapped (to VM) file access possible - use memory instructions rather tha ...
... Commands/calls include read, write, seek Access is typically through a file-system interface Raw I/O or file-system access - “binary xfr” of file data - interpretation is in application (personality of file lost) Memory-mapped (to VM) file access possible - use memory instructions rather tha ...
Chapter 2 Operating System Overview
... Operating systems are those programs that interface the machine with the applications programs. The main function of these systems is to dynamically allocate the shared system resources to the executing programs. As such, research in this area is clearly concerned with the management and scheduling ...
... Operating systems are those programs that interface the machine with the applications programs. The main function of these systems is to dynamically allocate the shared system resources to the executing programs. As such, research in this area is clearly concerned with the management and scheduling ...
Lecture 5
... Platform-independence is not practical. • In a system without an OS, such as a microcontroller used with a small embedded system, we either use Assembly or very low level C code. I/O often involves addressing specific bits in memory that are mapped to particular input or output devices. ...
... Platform-independence is not practical. • In a system without an OS, such as a microcontroller used with a small embedded system, we either use Assembly or very low level C code. I/O often involves addressing specific bits in memory that are mapped to particular input or output devices. ...
OS_Structure
... • Specific events cause execution of each unit. • Many portions of the OS are executed by specific request of a program, as by a call instruction, or in response to interrupts or other separate events. • When these components are invoked, they may complete their work before returning to the program, ...
... • Specific events cause execution of each unit. • Many portions of the OS are executed by specific request of a program, as by a call instruction, or in response to interrupts or other separate events. • When these components are invoked, they may complete their work before returning to the program, ...
CS4023_-_lecture_05_-_0910
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
Introduction
... d. Real time. Often used in a dedicated application, this system reads information from sensors and must respond within a fixed amount of time to ensure correct performance. e. Network. Provides operating system features across a network such as file sharing. f. SMP. Used in systems where there are ...
... d. Real time. Often used in a dedicated application, this system reads information from sensors and must respond within a fixed amount of time to ensure correct performance. e. Network. Provides operating system features across a network such as file sharing. f. SMP. Used in systems where there are ...
Chapter 2: Operating-System Structures
... – Status information (date, time, amount of available memory, disk space, who is logged on, …) – File modification (text editors, grep, …) – Programming language support (compiler, debuggers, …) – Program loading and execution (loaders, linkers) – Communications (ftp, browsers, ssh, …) – Other Syste ...
... – Status information (date, time, amount of available memory, disk space, who is logged on, …) – File modification (text editors, grep, …) – Programming language support (compiler, debuggers, …) – Program loading and execution (loaders, linkers) – Communications (ftp, browsers, ssh, …) – Other Syste ...
Lab 1 – Using the File System through Windows Explorer
... Other file managers: The Windows Explorer File Manager comes automatically with Windows 7 but it is not the only file management software that can be used with Windows 7. Google search the names of some others which might be useful. ...
... Other file managers: The Windows Explorer File Manager comes automatically with Windows 7 but it is not the only file management software that can be used with Windows 7. Google search the names of some others which might be useful. ...
SerialIO and OS
... void serial(void) _task_ SERIAL { while (1) {os_wait(); process_serial_data();} // os_create(MUSIC)? ...
... void serial(void) _task_ SERIAL { while (1) {os_wait(); process_serial_data();} // os_create(MUSIC)? ...
Operating System
... Examples of types of resources: CPU cycles (time), main memory, disk files, I/O devices (printers, USB flash drives etc). ...
... Examples of types of resources: CPU cycles (time), main memory, disk files, I/O devices (printers, USB flash drives etc). ...
Unit 2 - NIST NACOL
... program, but the concept is actually more general. In general, a process will need certain resources such as CPU time, memory, files, I/O devices, etc., to accomplish its task. These resources are given to the process when it is created. In addition to the various physical and logical resources that ...
... program, but the concept is actually more general. In general, a process will need certain resources such as CPU time, memory, files, I/O devices, etc., to accomplish its task. These resources are given to the process when it is created. In addition to the various physical and logical resources that ...
Slides
... – Status information (date, time, amount of available memory, disk space, who is logged on, …) – File modification (text editors, grep, …) – Programming language support (compiler, debuggers, …) – Program loading and execution (loaders, linkers) – Communications (ftp, browsers, ssh, …) – Other Syste ...
... – Status information (date, time, amount of available memory, disk space, who is logged on, …) – File modification (text editors, grep, …) – Programming language support (compiler, debuggers, …) – Program loading and execution (loaders, linkers) – Communications (ftp, browsers, ssh, …) – Other Syste ...