William Stallings Computer Organization and Architecture
... • Allows programs to be altered and recompiled independently, without re-linking and re-loading • Lends itself to sharing among processes • Lends itself to protection • Some systems combine segmentation with ...
... • Allows programs to be altered and recompiled independently, without re-linking and re-loading • Lends itself to sharing among processes • Lends itself to protection • Some systems combine segmentation with ...
1-web
... or the operating system itself. Describe two difficulties that you think could arise with such a scheme. Answer: ...
... or the operating system itself. Describe two difficulties that you think could arise with such a scheme. Answer: ...
COS 318: Operating Systems OS Structures and System Calls Kai Li
... Application use these calls to manage memory at fine granularity When reaching the end, library asks the kernel for more ...
... Application use these calls to manage memory at fine granularity When reaching the end, library asks the kernel for more ...
Chapter 3: Operating-System Structures • System Components
... compiled, it must be loaded into memory to be executed. The system may provide loaders, linkage editors and debuggers. – Communications: Programs provide mechanism for creating virtual connections among processes, users, and computer systems, such as sending messages and transferring files. Operatin ...
... compiled, it must be loaded into memory to be executed. The system may provide loaders, linkage editors and debuggers. – Communications: Programs provide mechanism for creating virtual connections among processes, users, and computer systems, such as sending messages and transferring files. Operatin ...
Test Bank Chapter Three (Operating Systems)
... The following is a list of terms from the chapter along with descriptive phrases that can be used to produce questions (depending on the topics covered in your course) in which the students are ask to match phrases and terms. An example would be a question of the form, “In the blank next to each phr ...
... The following is a list of terms from the chapter along with descriptive phrases that can be used to produce questions (depending on the topics covered in your course) in which the students are ask to match phrases and terms. An example would be a question of the form, “In the blank next to each phr ...
COS 318: Operating Systems Processes and Threads
... Program is just the code; just part of process state Example: many users can run the same program ...
... Program is just the code; just part of process state Example: many users can run the same program ...
CS 519 -- Operating Systems -
... Segment Cleaning in LFS LFS disk is divided into segments that are written sequentially Live data must be copied out of a segment before the segment can be re-written The process of copying data out of a segment: cleaning A separate cleaner thread moves along the log, removes old segments f ...
... Segment Cleaning in LFS LFS disk is divided into segments that are written sequentially Live data must be copied out of a segment before the segment can be re-written The process of copying data out of a segment: cleaning A separate cleaner thread moves along the log, removes old segments f ...
CS420: Operating Systems Multiprocessor Scheduling
... • Recently, the architectural trend is to place multiple processor cores on same physical chip (this will likely be true for the foreseeable future) - Faster and consume less power than system where each processor has its own ...
... • Recently, the architectural trend is to place multiple processor cores on same physical chip (this will likely be true for the foreseeable future) - Faster and consume less power than system where each processor has its own ...
Module 3: Operating
... compiled, it must be loaded into memory to be executed. The system may provide loaders, linkage editors and debuggers. – Communications: Programs provide mechanism for creating virtual connections among processes, users, and computer systems, such as sending messages and transferring files. Operatin ...
... compiled, it must be loaded into memory to be executed. The system may provide loaders, linkage editors and debuggers. – Communications: Programs provide mechanism for creating virtual connections among processes, users, and computer systems, such as sending messages and transferring files. Operatin ...
pdf
... or the operating system itself. Describe two difficulties that you think could arise with such a scheme. Answer: The data required by the operating system (passwords, access controls, accounting information, and so on) would have to be stored in or passed through unprotected memory and thus be acces ...
... or the operating system itself. Describe two difficulties that you think could arise with such a scheme. Answer: The data required by the operating system (passwords, access controls, accounting information, and so on) would have to be stored in or passed through unprotected memory and thus be acces ...
Operating System Structures
... – control-card interpreter – command-line interpreter – shell (in UNIX) Its function is to get and execute the next command statement. ...
... – control-card interpreter – command-line interpreter – shell (in UNIX) Its function is to get and execute the next command statement. ...
Linux+ Guide to Linux Certification
... • Resides in a file called COMMAND.COM, which consists of two parts, stored in two different sections of main memory – Only part of OS that appears on the public directory ...
... • Resides in a file called COMMAND.COM, which consists of two parts, stored in two different sections of main memory – Only part of OS that appears on the public directory ...
Operating System Organization Purpose of an OS
... distinguish between OS and user instructions •Kernels - most critical part of OS placed in kernel (trusted software module) •Method of invoking system service - calling a system function or sending a message to a system process ...
... distinguish between OS and user instructions •Kernels - most critical part of OS placed in kernel (trusted software module) •Method of invoking system service - calling a system function or sending a message to a system process ...
Upload Files to Servers. Case Study and Implementation
... is also a large set, but few have multiplatform capability. If we want a full-featured web server, Apache is our solution. Under Apache, we have the possibility to execute programs already compiled in C, Fortran and Java, under Unix machines we can directly execute Perl programs, and, most important ...
... is also a large set, but few have multiplatform capability. If we want a full-featured web server, Apache is our solution. Under Apache, we have the possibility to execute programs already compiled in C, Fortran and Java, under Unix machines we can directly execute Perl programs, and, most important ...
Computer Hardware
... A hardware platform may support a variety of operating systems An operating system may work on a variety of platforms A standard operating system that works on different hardware Provides program and file portability Enables user efficiency through recognizable interface Is implemented t ...
... A hardware platform may support a variety of operating systems An operating system may work on a variety of platforms A standard operating system that works on different hardware Provides program and file portability Enables user efficiency through recognizable interface Is implemented t ...
Shim
... and it manages process identities. Potential attack: A malicious OS might try to redirect the results of a process, the process return value or other information, to a wrong process. Proposed solution: Overshadow uses its own protected table for the process’s signal handlers and hypercall to ensure ...
... and it manages process identities. Potential attack: A malicious OS might try to redirect the results of a process, the process return value or other information, to a wrong process. Proposed solution: Overshadow uses its own protected table for the process’s signal handlers and hypercall to ensure ...
Chapter 1: Introduction to Computers
... o Disk scanner (Detects and corrects disk problems and removes unnecessary files) o Disk defragmenter (Reorganizes files and unused space – programs can run faster) o Backup utility (Copy selected files or entire hard disk to another disk or tape) o Screen saver (Causes monitor's screen to display a ...
... o Disk scanner (Detects and corrects disk problems and removes unnecessary files) o Disk defragmenter (Reorganizes files and unused space – programs can run faster) o Backup utility (Copy selected files or entire hard disk to another disk or tape) o Screen saver (Causes monitor's screen to display a ...
Operating System for Parallel Computing
... In contrast, the Sprite [5] project developed a distributed operating system from scratch. Sprite operating system supports process migration and load balancing, i.e., dynamic placement of processes at the least loaded workstations. In Sprite a migrated process executes the majority of system calls ...
... In contrast, the Sprite [5] project developed a distributed operating system from scratch. Sprite operating system supports process migration and load balancing, i.e., dynamic placement of processes at the least loaded workstations. In Sprite a migrated process executes the majority of system calls ...
Chapter 5 Concurrency: Mutual Exclusion and Synchronization
... mechanisms to enforce mutual exclusion so the actions of concurrent processes won’t depend on the order in which their instructions are ...
... mechanisms to enforce mutual exclusion so the actions of concurrent processes won’t depend on the order in which their instructions are ...
Figure 15.1 A distributed multimedia system
... Server: A subsystem that provides a particular type of service to a priori unknown clients. Control functionally distributed among the various servers in the system. Control of individual resources is centralized in a server(localized?) ...
... Server: A subsystem that provides a particular type of service to a priori unknown clients. Control functionally distributed among the various servers in the system. Control of individual resources is centralized in a server(localized?) ...
1. design principle
... Windows NT takes about 10M of memory for its own use. The minimum size page file size that can support Windows NT on a given system can be expressed with the formula (RAM - 10M) + pagefile = 22M. This formula can be simplified to (pagefile size) = 32M - RAM. Therefore, on a computer with 24M of RAM, ...
... Windows NT takes about 10M of memory for its own use. The minimum size page file size that can support Windows NT on a given system can be expressed with the formula (RAM - 10M) + pagefile = 22M. This formula can be simplified to (pagefile size) = 32M - RAM. Therefore, on a computer with 24M of RAM, ...
3 Operating Systems
... tape and the loading of the assembler. The other steps, like the linking process where "library" code was read from tapes were handled in similar fashion. If the process resulted in successful construction of an executable program, this was then "RUN" so that it could process its data cards. The FOR ...
... tape and the loading of the assembler. The other steps, like the linking process where "library" code was read from tapes were handled in similar fashion. If the process resulted in successful construction of an executable program, this was then "RUN" so that it could process its data cards. The FOR ...
Exception Handling and System Calls
... know is an operating system simulator rather than a real operating system) First, user programs are compiled and linked with start.s. When you invoke nachos with the "-x" flag, the MIPS simulator begins executing the user program specified, instruction by instruction (i.e., the MIPS simulator is an ...
... know is an operating system simulator rather than a real operating system) First, user programs are compiled and linked with start.s. When you invoke nachos with the "-x" flag, the MIPS simulator begins executing the user program specified, instruction by instruction (i.e., the MIPS simulator is an ...
UNIT 1
... kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control stat ...
... kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control stat ...