Chapter 2
... File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission ...
... File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission ...
Operating Systems
... into memory for execution. However, the operating system itself is a program that needs to be loaded into the memory and be run. How is this dilemma solved? The solution is a two-stage process. A very small section of memory is made of ROM and holds a small program called the bootstrap program. When ...
... into memory for execution. However, the operating system itself is a program that needs to be loaded into the memory and be run. How is this dilemma solved? The solution is a two-stage process. A very small section of memory is made of ROM and holds a small program called the bootstrap program. When ...
Object Oriented Paradigm
... real-world problem in the form of so-called objects. Objects are represent both: behaviors of real world objects as well as their characteristics. All work in this concepts are using messages. ...
... real-world problem in the form of so-called objects. Objects are represent both: behaviors of real world objects as well as their characteristics. All work in this concepts are using messages. ...
7 Operating Systems
... program called the bootstrap program. When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. When loading is done, the program counter is set to the first instruction of the operating system in RAM. ...
... program called the bootstrap program. When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. When loading is done, the program counter is set to the first instruction of the operating system in RAM. ...
Document
... file system that provides many improvements over the old FAT file system, such as better security, extensions, longer names, etc. FAT: File Allocation Table use to be the defacto standard for all operating systems and is still supported by practically all. FAT can make due as a relatively easy to su ...
... file system that provides many improvements over the old FAT file system, such as better security, extensions, longer names, etc. FAT: File Allocation Table use to be the defacto standard for all operating systems and is still supported by practically all. FAT can make due as a relatively easy to su ...
operating system
... program called the bootstrap program. When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. When loading is done, the program counter is set to the first instruction of the operating system in RAM. ...
... program called the bootstrap program. When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. When loading is done, the program counter is set to the first instruction of the operating system in RAM. ...
Document
... program called the bootstrap program. When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. When loading is done, the program counter is set to the first instruction of the operating system in RAM. ...
... program called the bootstrap program. When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. When loading is done, the program counter is set to the first instruction of the operating system in RAM. ...
Distributed Systems Major Design Issues
... Design Issue Example: Resource identification [2] The resources in a distributed system are spread across different computers and a naming scheme has to be devised so that users can discover and refer to the resources that they need. An example of such a naming scheme is the URL (Uniform Resource Lo ...
... Design Issue Example: Resource identification [2] The resources in a distributed system are spread across different computers and a naming scheme has to be devised so that users can discover and refer to the resources that they need. An example of such a naming scheme is the URL (Uniform Resource Lo ...
Distributed Systems Major Design Issues
... Design Issue Example: Resource identification [2] The resources in a distributed system are spread across different computers and a naming scheme has to be devised so that users can discover and refer to the resources that they need. An example of such a naming scheme is the URL (Uniform Resource Lo ...
... Design Issue Example: Resource identification [2] The resources in a distributed system are spread across different computers and a naming scheme has to be devised so that users can discover and refer to the resources that they need. An example of such a naming scheme is the URL (Uniform Resource Lo ...
Chapter I Introduction
... blocks hoping they will be accessed again – Caching • Works very well because we keep accessing again and again the data we are working with • Caching is a fundamental technique of OS and database design ...
... blocks hoping they will be accessed again – Caching • Works very well because we keep accessing again and again the data we are working with • Caching is a fundamental technique of OS and database design ...
Processes
... • initialized variables (globals) • dynamically allocated variables (malloc, new) • stack variables (C automatic variables, function arguments) – DLLs: libraries that were not compiled or linked with the program • containing code & data, possibly shared with other programs ...
... • initialized variables (globals) • dynamically allocated variables (malloc, new) • stack variables (C automatic variables, function arguments) – DLLs: libraries that were not compiled or linked with the program • containing code & data, possibly shared with other programs ...
Operating System for Parallel Computing
... programming environment on the basis of a network of computers running conventional operating systems like UNIX or Windows NT. However, parallel programming libraries do not support process migration between network nodes. Besides, these libraries are based on highlevel operating system services, wh ...
... programming environment on the basis of a network of computers running conventional operating systems like UNIX or Windows NT. However, parallel programming libraries do not support process migration between network nodes. Besides, these libraries are based on highlevel operating system services, wh ...
Control Flow: Conditional Statements
... 1. Replace the print stub with code that implements the True (YES) branch of the next question (Do you like cheese?) and uses a print stub on the False (NO) branch. Run two tests of the ...
... 1. Replace the print stub with code that implements the True (YES) branch of the next question (Do you like cheese?) and uses a print stub on the False (NO) branch. Run two tests of the ...
COS 318: Operating Systems OS Structures and System Calls Andy Bavier
... Load and read system registers Change processor modes from kernel to user Change the voltage and frequency of processor Halt a processor Reset a processor Perform I/O operations ...
... Load and read system registers Change processor modes from kernel to user Change the voltage and frequency of processor Halt a processor Reset a processor Perform I/O operations ...
Chapter 6
... Windows 3.x (an operating environment over DOS, not an operating system). Windows 95 and Windows 98 (personal operating systems). Windows Me (personal operating systems for home PCs). Windows NT (network operating system). Windows 2000 (network and professional operating system). Windows XP (latest ...
... Windows 3.x (an operating environment over DOS, not an operating system). Windows 95 and Windows 98 (personal operating systems). Windows Me (personal operating systems for home PCs). Windows NT (network operating system). Windows 2000 (network and professional operating system). Windows XP (latest ...
Nedlasting og Installasjonsveiledning for JOGL2: Se veiledning
... unzip version of the javadoc. b. Specify the javadoc's archive file (either zip or jar) in "Javadoc in archive" if you use a zip file. Choose "Validate", which search for an "index.html" file. This is needed for Eclipse to display javadoc information about classes and methods. e. (Optional But Recom ...
... unzip version of the javadoc. b. Specify the javadoc's archive file (either zip or jar) in "Javadoc in archive" if you use a zip file. Choose "Validate", which search for an "index.html" file. This is needed for Eclipse to display javadoc information about classes and methods. e. (Optional But Recom ...
C++ Programming: Program Design Including Data Structures, Fifth
... Once compiled and linked, loader can place program into main memory for execution The final step is to execute the program Compiler guarantees that the program follows the rules of the language ...
... Once compiled and linked, loader can place program into main memory for execution The final step is to execute the program Compiler guarantees that the program follows the rules of the language ...
GC University Lahore
... are managed by robust, secure and scalable operating systems. Modern high-end operating systems are multitasking, multiprocessing and multi-user. All desktop Operating systems and most of server operating systems provide GUI features also. All or most OS are modularized, configurable and customizabl ...
... are managed by robust, secure and scalable operating systems. Modern high-end operating systems are multitasking, multiprocessing and multi-user. All desktop Operating systems and most of server operating systems provide GUI features also. All or most OS are modularized, configurable and customizabl ...
Chapter 2 Operating
... specifications. At the highest level, the design of the system will be affected by the choice of hardware and the type of system. Once an operating system is designed, it must be implemented. Traditionally, operating systems have been written in assembly language. Now, however, they are most commonl ...
... specifications. At the highest level, the design of the system will be affected by the choice of hardware and the type of system. Once an operating system is designed, it must be implemented. Traditionally, operating systems have been written in assembly language. Now, however, they are most commonl ...
Os 2marks - Erode Sengunthar Engineering College
... If a process does not have enough memory for its working set, it will thrash. Providing enough frames to each process to avoid thrashing may require process swapping and scheduling 6. What Are The File Attributes? Name, type, location, size, protection, time, date and user identification these are t ...
... If a process does not have enough memory for its working set, it will thrash. Providing enough frames to each process to avoid thrashing may require process swapping and scheduling 6. What Are The File Attributes? Name, type, location, size, protection, time, date and user identification these are t ...
Example Sheet for Operating Systems I (Part IA)
... (c) Non-blocking I/O is possible even when using a block device. (d) Shortest job first (SJF) is an optimal scheduling algorithm. (e) Round-robin scheduling can suffer from the so-called ‘convoy effect’. (f) A paged virtual memory is smaller than a segmented one. (g) Direct memory access (DMA) makes d ...
... (c) Non-blocking I/O is possible even when using a block device. (d) Shortest job first (SJF) is an optimal scheduling algorithm. (e) Round-robin scheduling can suffer from the so-called ‘convoy effect’. (f) A paged virtual memory is smaller than a segmented one. (g) Direct memory access (DMA) makes d ...
File
... Additional functions exist not for helping the user, but rather for ensuring efficient system operations. ...
... Additional functions exist not for helping the user, but rather for ensuring efficient system operations. ...
Dilma M. da Silva IBM TJ Watson Research Center - IC
... Allowing a single process to serve many clients, with no leaking of information between clients Labels and Event Processes in the Asbestos Operating System (UCLA, MIT, NYU) Enforce isolation between kernel modules (helps detect bugs, limit their damage) Mondrix: Memory Isolation for Linux using ...
... Allowing a single process to serve many clients, with no leaking of information between clients Labels and Event Processes in the Asbestos Operating System (UCLA, MIT, NYU) Enforce isolation between kernel modules (helps detect bugs, limit their damage) Mondrix: Memory Isolation for Linux using ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.