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os_ch1-2008
... • Systems generally first distinguish among users, to determine who can do what – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all files, processes of that user to determine access control – Group identifier (group ID) allow ...
... • Systems generally first distinguish among users, to determine who can do what – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all files, processes of that user to determine access control – Group identifier (group ID) allow ...
Memory Protection
... • Intel Pentium II Software Developer’s Manual: Volume 3. Sections 4.5 through 4.8 – http://developer.intel.com/design/processor/man uals/253668.pdf ...
... • Intel Pentium II Software Developer’s Manual: Volume 3. Sections 4.5 through 4.8 – http://developer.intel.com/design/processor/man uals/253668.pdf ...
Slides 2 - USC Upstate: Faculty
... – The owners of information stored in a multiuser or networked computer system may want to control use of that information – concurrent processes should not interfere with each other ...
... – The owners of information stored in a multiuser or networked computer system may want to control use of that information – concurrent processes should not interfere with each other ...
different people attempt to accomplish the
... work that has real impact upon both programming and open source. If you care about these issues, you need to read Nick’s report. ...
... work that has real impact upon both programming and open source. If you care about these issues, you need to read Nick’s report. ...
Document - Oman College of Management & Technology
... create, and delete files. Communications – exchange of information between processes executing either on the same computer or on different systems tied together by a network. Implemented via shared memory or message passing. Error detection – ensure correct computing by detecting errors in the C ...
... create, and delete files. Communications – exchange of information between processes executing either on the same computer or on different systems tied together by a network. Implemented via shared memory or message passing. Error detection – ensure correct computing by detecting errors in the C ...
Operating Systems Overview
... A computer with multiple processors Each processor can perform the same functions and share same main memory and I/O facilities ...
... A computer with multiple processors Each processor can perform the same functions and share same main memory and I/O facilities ...
Powerpoint source
... and ran your program; basically, just a run-time library • Simple batch systems were the first real operating systems: – O.S. was stored in part of primary memory – It loaded a single job (from card reader) into memory – Ran that job (printed its output, etc.) – Loaded the next job... – Control card ...
... and ran your program; basically, just a run-time library • Simple batch systems were the first real operating systems: – O.S. was stored in part of primary memory – It loaded a single job (from card reader) into memory – Ran that job (printed its output, etc.) – Loaded the next job... – Control card ...
2.4 The service and functions provided by an operating system can
... two main categories. Briefly describes the two categories and discuss how they differ. ANS: One class of services provided by an operating system is to enforce protection between different processes running concurrently in the system. Processes are allowed to access only those memory locations that ...
... two main categories. Briefly describes the two categories and discuss how they differ. ANS: One class of services provided by an operating system is to enforce protection between different processes running concurrently in the system. Processes are allowed to access only those memory locations that ...
virtual machine
... • Mostly accessed by programs via a high-level Application Program Interface (API) rather than direct system call use • Three most common APIs are Win32 API for Windows, POSIX API for POSIX-based systems (including UNIX, Linux, and Mac OS X), and Java API for the Java virtual machine (JVM) ...
... • Mostly accessed by programs via a high-level Application Program Interface (API) rather than direct system call use • Three most common APIs are Win32 API for Windows, POSIX API for POSIX-based systems (including UNIX, Linux, and Mac OS X), and Java API for the Java virtual machine (JVM) ...
Lecture 22 File-System Interface
... File System • It is the part of the Operating System which consists of – An interface to the user – Data structures and algorithms needed by the Operating System to implement that interface ...
... File System • It is the part of the Operating System which consists of – An interface to the user – Data structures and algorithms needed by the Operating System to implement that interface ...
ppt
... applications to run simultaneously on the same system, that would also mean different look & feels for each of them. Different libOSes may have varying levels of compatibility and interoperability with each other. Poorly chosen abstractions may cause lose of information Self-paging libOSes ...
... applications to run simultaneously on the same system, that would also mean different look & feels for each of them. Different libOSes may have varying levels of compatibility and interoperability with each other. Poorly chosen abstractions may cause lose of information Self-paging libOSes ...
Introduction to Object Technology
... multiple interactive jobs • Processor’s time is shared among multiple users • Multiple users simultaneously access the system through terminals ...
... multiple interactive jobs • Processor’s time is shared among multiple users • Multiple users simultaneously access the system through terminals ...
Operating systems
... operator as intermediary is that the users have no interaction with their jobs once they are submitted to the operator. New operating systems were developed that allowed a program being executed to carry on a dialogue with the user through remote terminals (interactive processing) – in which the u ...
... operator as intermediary is that the users have no interaction with their jobs once they are submitted to the operator. New operating systems were developed that allowed a program being executed to carry on a dialogue with the user through remote terminals (interactive processing) – in which the u ...
Chapter 2 Operating System Overview
... • Allows the process to be comprised of a number of fixed-size blocks, called pages • Virtual address is a page number and an offset within the page • Each page may be located anywhere in main ...
... • Allows the process to be comprised of a number of fixed-size blocks, called pages • Virtual address is a page number and an offset within the page • Each page may be located anywhere in main ...
Operating System Services
... May occur in the CPU and memory hardware, in I/O devices, in user program For each type of error, OS should take the appropriate action to ensure correct and consistent computing Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
... May occur in the CPU and memory hardware, in I/O devices, in user program For each type of error, OS should take the appropriate action to ensure correct and consistent computing Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
Module 3: Operating-System Structures
... Operating System Services • Program execution – system capability to load a program into memory and to run it. • I/O operations – since user programs cannot execute I/O operations directly, the operating system ust provide some means to perform I/O. • File-system manipulation – program capability t ...
... Operating System Services • Program execution – system capability to load a program into memory and to run it. • I/O operations – since user programs cannot execute I/O operations directly, the operating system ust provide some means to perform I/O. • File-system manipulation – program capability t ...
Chapter 3: Threads, SMP and Microkernels
... Time sharing – This system uses CPU scheduling and multiprogramming to provide economical interactive use of a system. The CPU switches rapidly from one user to another. Instead of having a job defined by a spooled card images, each program reads its next control card from the terminal, and output i ...
... Time sharing – This system uses CPU scheduling and multiprogramming to provide economical interactive use of a system. The CPU switches rapidly from one user to another. Instead of having a job defined by a spooled card images, each program reads its next control card from the terminal, and output i ...
OPERATING SYSTEM FUNCTIONS
... between applications and the actual data processing done at the hardware level. The kernel's responsibilities include managing the system's resources (the communication between hardware and software components). Usually as a basic component of an operating system, a kernel can provide the lowest-lev ...
... between applications and the actual data processing done at the hardware level. The kernel's responsibilities include managing the system's resources (the communication between hardware and software components). Usually as a basic component of an operating system, a kernel can provide the lowest-lev ...
operating system
... interrupt so that the OS can not take control back from it? – Disabling interrupts must be a privileged instruction which is not executable by applications ...
... interrupt so that the OS can not take control back from it? – Disabling interrupts must be a privileged instruction which is not executable by applications ...
Operating- System Structures
... List five services provided by an operating system. Explain how each provides convenience to the users. Explain also in which cases it would be impossible for user-level programs to provide these services. Answer: a. Program execution. The operating system loads the contents (or sections) of a file ...
... List five services provided by an operating system. Explain how each provides convenience to the users. Explain also in which cases it would be impossible for user-level programs to provide these services. Answer: a. Program execution. The operating system loads the contents (or sections) of a file ...
chapter 1: operating system fundamentals
... • A collection of software modules to assist programmers in enhancing system efficiency, flexibility, and robustness • An Extended Machine from the users’ viewpoint • A Resource Manager from the system’s viewpoint ...
... • A collection of software modules to assist programmers in enhancing system efficiency, flexibility, and robustness • An Extended Machine from the users’ viewpoint • A Resource Manager from the system’s viewpoint ...
CENG334 Introduction to Operating Systems
... Announcements about the course will be made at the CENG334 newsgroup at news://metu.ceng.course.334 Please put Section 2 & 3 on the subject line of your posting. If you have a specific question you can send an e-mail to the us. However make sure that the subject line starts with ...
... Announcements about the course will be made at the CENG334 newsgroup at news://metu.ceng.course.334 Please put Section 2 & 3 on the subject line of your posting. If you have a specific question you can send an e-mail to the us. However make sure that the subject line starts with ...
OS 2200
![](https://commons.wikimedia.org/wiki/Special:FilePath/OS_2200_Software_Genealogy.png?width=300)
OS 2200 is the operating system for the Unisys ClearPath Dorado family of mainframe systems. The operating system kernel of OS 2200 is a lineal descendant of Exec 8 for the UNIVAC 1108. Documentation and other information on current and past Unisys systems can be found on the Unisys public support website.See Unisys 2200 Series system architecture for a description of the machine architecture and its relationship to the OS 2200 operating system.