CS3161 Operating System Principles
... Process represents a program (application) executing on a computer system. Process management involves in keep track of process execution status and to share out processor resource (fairly and efficiently). ...
... Process represents a program (application) executing on a computer system. Process management involves in keep track of process execution status and to share out processor resource (fairly and efficiently). ...
Introduction
... on each terminal port whenever the system is allowing users to log in After getty displays the message login: and some types the usernames followed by RETURN, it starts up a program called login to finish the process of logging in. Then getty ...
... on each terminal port whenever the system is allowing users to log in After getty displays the message login: and some types the usernames followed by RETURN, it starts up a program called login to finish the process of logging in. Then getty ...
Linux+ Guide to Linux Certification
... • When CPU senses interrupt, it does two things: – Puts contents of PSW (program status word), code segment register, and instruction pointer register on a stack – Disables interrupt system so that other interrupts will be put off until current one has been resolved ...
... • When CPU senses interrupt, it does two things: – Puts contents of PSW (program status word), code segment register, and instruction pointer register on a stack – Disables interrupt system so that other interrupts will be put off until current one has been resolved ...
Section 3A: Windows forensics
... Exploring Microsoft File Structures • Disk space is allocated by cluster • Results in drive slack • If you create a 5000 byte Word file then on a FAT 16 1.6 GB disk then the OS reserves 1 cluster • However in FAT 16 32,000 bytes allocated to your file = 27,000 file slack • 5000 byte file uses 10 se ...
... Exploring Microsoft File Structures • Disk space is allocated by cluster • Results in drive slack • If you create a 5000 byte Word file then on a FAT 16 1.6 GB disk then the OS reserves 1 cluster • However in FAT 16 32,000 bytes allocated to your file = 27,000 file slack • 5000 byte file uses 10 se ...
2.01 - Computer Science at Rutgers
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing ...
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing ...
File
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
Sequential file Processing
... – IO stands for Input/Output These class definitions are NOT automatically included in ...
... – IO stands for Input/Output These class definitions are NOT automatically included in ...
Module 3: Operating
... – the operation involved (for instance a system call for a read operation might need to specify the input device used, the length of the data to transfer, the position of memory where the trasfer should go to) ...
... – the operation involved (for instance a system call for a read operation might need to specify the input device used, the length of the data to transfer, the position of memory where the trasfer should go to) ...
Lab 1 – Using the File System through Windows Explorer
... How much space is used? ………………………………………………….. How much free space is there? …………………………………………….. Repeat the same for your G: drive. ...
... How much space is used? ………………………………………………….. How much free space is there? …………………………………………….. Repeat the same for your G: drive. ...
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 ...
Slide 1
... boot sequence and can be configured in the CMOS setup. • Once an OS has been located, the boot program will encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program that will initialize the OS. VCN ICT Department 2013 ...
... boot sequence and can be configured in the CMOS setup. • Once an OS has been located, the boot program will encounter the boot record, which tells it where to find the beginning of the OS and the subsequent program that will initialize the OS. VCN ICT Department 2013 ...
unit1
... In simple Batch System , Job2 has to wait for 5min until job1 has been finished. Job 3 has been wait for 20 min so that job1 & job 2 has been over ( 5 + 15).So that total time to process all the three jobs are 30 min. But in Multiprogramming batch system when job1 is over , 1/3 of job2 and ½ of job3 ...
... In simple Batch System , Job2 has to wait for 5min until job1 has been finished. Job 3 has been wait for 20 min so that job1 & job 2 has been over ( 5 + 15).So that total time to process all the three jobs are 30 min. But in Multiprogramming batch system when job1 is over , 1/3 of job2 and ½ of job3 ...
UNICOS, FORTRAN 90, NQS
... – Detailed and sophisticated resource accounting – A user database and quota system – A political scheduler that ensures fair distribution of resources – A Data Migration Facility that monitors disk usage and transfers infrequently used files to ...
... – Detailed and sophisticated resource accounting – A user database and quota system – A political scheduler that ensures fair distribution of resources – A Data Migration Facility that monitors disk usage and transfers infrequently used files to ...
Two general strategies for creating multiple threads
... registers, stack pointers, and general-purpose registers, plus any condition-code information. Along with the program counter, this state information must be saved when an interrupt occurs, to allow the process to be continued correctly afterward (Figure 3.4). • CPU-scheduling information: includes ...
... registers, stack pointers, and general-purpose registers, plus any condition-code information. Along with the program counter, this state information must be saved when an interrupt occurs, to allow the process to be continued correctly afterward (Figure 3.4). • CPU-scheduling information: includes ...
How-OS-Works.pdf
... How the Operating System Works, a brief overview, R. Craig Collins, © 2008 When the computer is turned on, the BIOS locates the operating system on the hard drive, and transfers the core parts into memory, RAM. If a command line is used, a file named autoexec.bat is executed, to configure the system ...
... How the Operating System Works, a brief overview, R. Craig Collins, © 2008 When the computer is turned on, the BIOS locates the operating system on the hard drive, and transfers the core parts into memory, RAM. If a command line is used, a file named autoexec.bat is executed, to configure the system ...
Upload Files to Servers. Case Study and Implementation
... 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, under all operating system platforms we can execute PHP programs if we previously install PHP language and module binarie ...
... 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, under all operating system platforms we can execute PHP programs if we previously install PHP language and module binarie ...
WORD
... ◦ Clustered systems – Linked multiprocessor systems Multiprogramming – Provides efficiency via job scheduling ◦ When OS has to wait (ex: for I/O), switches to another job Timesharing – CPU switches jobs so frequently that each user can interact with each job while it is running (interactive computin ...
... ◦ Clustered systems – Linked multiprocessor systems Multiprogramming – Provides efficiency via job scheduling ◦ When OS has to wait (ex: for I/O), switches to another job Timesharing – CPU switches jobs so frequently that each user can interact with each job while it is running (interactive computin ...
Study Guide to Accompany Operating Systems Concepts 9 Ed by
... ◦ Clustered systems – Linked multiprocessor systems Multiprogramming – Provides efficiency via job scheduling ◦ When OS has to wait (ex: for I/O), switches to another job Timesharing – CPU switches jobs so frequently that each user can interact with each job while it is running (interactive computin ...
... ◦ Clustered systems – Linked multiprocessor systems Multiprogramming – Provides efficiency via job scheduling ◦ When OS has to wait (ex: for I/O), switches to another job Timesharing – CPU switches jobs so frequently that each user can interact with each job while it is running (interactive computin ...
doc
... ◦ Clustered systems – Linked multiprocessor systems Multiprogramming – Provides efficiency via job scheduling ◦ When OS has to wait (ex: for I/O), switches to another job Timesharing – CPU switches jobs so frequently that each user can interact with each job while it is running (interactive computin ...
... ◦ Clustered systems – Linked multiprocessor systems Multiprogramming – Provides efficiency via job scheduling ◦ When OS has to wait (ex: for I/O), switches to another job Timesharing – CPU switches jobs so frequently that each user can interact with each job while it is running (interactive computin ...
Nachos Overview - Computer and Information Science | Brooklyn
... • MIPS Instruction Processor The processor is responsible for simulating the execution of user programs. The processor has a set of registers and a small (simulated) physical memory for storing user programs and their data. The contents of the registers and of memory can be read and changed by the o ...
... • MIPS Instruction Processor The processor is responsible for simulating the execution of user programs. The processor has a set of registers and a small (simulated) physical memory for storing user programs and their data. The contents of the registers and of memory can be read and changed by the o ...
lecture6
... computer. At that time the use of disks for storing the operating system and data was considered cutting edge technology. Until its acquisition of QDOS, Microsoft had been mainly a vendor of computer programming languages. Gates and cofounder Paul Allen had written Microsoft BASIC and were selling i ...
... computer. At that time the use of disks for storing the operating system and data was considered cutting edge technology. Until its acquisition of QDOS, Microsoft had been mainly a vendor of computer programming languages. Gates and cofounder Paul Allen had written Microsoft BASIC and were selling i ...
CIS162AB
... – IO stands for Input/Output These class definitions are NOT automatically included in ...
... – IO stands for Input/Output These class definitions are NOT automatically included in ...
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 ...
Summary for chapter 2 OPERATING SYSTEM nAJWA kNEFATI
... The functions that make up an API typically invoke the actual system calls . EX: Function CreateProcess () (create a new process) actually invokes the NTCreateProcess () system call in the Windows kernel. Why would an application programmer prefer programming according to an API rather than invoking ...
... The functions that make up an API typically invoke the actual system calls . EX: Function CreateProcess () (create a new process) actually invokes the NTCreateProcess () system call in the Windows kernel. Why would an application programmer prefer programming according to an API rather than invoking ...