11.4 Software Operating Systems
... When applications are loaded they need memory to work with. The OS allocates software RAM to work in. It ensures that the RAM allocated is not used by another application. ...
... When applications are loaded they need memory to work with. The OS allocates software RAM to work in. It ensures that the RAM allocated is not used by another application. ...
Operating System: A Software Engineering Perspective
... Basic idea: users can supply modules, which run directly in the kernel’s address space ...
... Basic idea: users can supply modules, which run directly in the kernel’s address space ...
CPU cont, the Memory Hierarchy, Programs vs. Processes
... Programs vs. Processes • How does this relate to Object Oriented Programming? • An important difference: – Class definition vs. – Object creation / instantiation ...
... Programs vs. Processes • How does this relate to Object Oriented Programming? • An important difference: – Class definition vs. – Object creation / instantiation ...
L02_OperatingSystemEvolution
... process suspension and resumption process synchronization process communication ...
... process suspension and resumption process synchronization process communication ...
08 Operating System Support
... • Determines which programs are submitted for processing • i.e. controls the degree of multiprogramming • Once submitted, a job becomes a process for the short term scheduler • (or it becomes a swapped out job for the medium term scheduler) ...
... • Determines which programs are submitted for processing • i.e. controls the degree of multiprogramming • Once submitted, a job becomes a process for the short term scheduler • (or it becomes a swapped out job for the medium term scheduler) ...
Operating Systems
... • Multitasking environments must be careful to use most recent value, not matter where it is stored in the storage hierarchy Multiprocessor environment must provide cache coherency in hardware such that all CPUs have the most recent value in their cache • Distributed environment situation even more ...
... • Multitasking environments must be careful to use most recent value, not matter where it is stored in the storage hierarchy Multiprocessor environment must provide cache coherency in hardware such that all CPUs have the most recent value in their cache • Distributed environment situation even more ...
07 External Memory
... Allows programs to be altered and recompiled independently, without relinking and re-loading Lends itself to sharing among processes Lends itself to protection ...
... Allows programs to be altered and recompiled independently, without relinking and re-loading Lends itself to sharing among processes Lends itself to protection ...
2007-06.pdf
... As a virtual machine, an operating system provides an abstraction over the hardware by means of, for example, system calls. In this way, it provides a convenient way to program a machine without the need to know about hardware details. As a resource manager, it allows multiple processes to share the ...
... As a virtual machine, an operating system provides an abstraction over the hardware by means of, for example, system calls. In this way, it provides a convenient way to program a machine without the need to know about hardware details. As a resource manager, it allows multiple processes to share the ...
Booting a PC
... No GDT, LDT or paging table is needed by the CPU in real mode The code that initializes these data structures must run in real mode When the BIOS runs – it initializes the PCI bus and all the important devices it knows about, (in particular VGA display) – then it searches for a bootable device such ...
... No GDT, LDT or paging table is needed by the CPU in real mode The code that initializes these data structures must run in real mode When the BIOS runs – it initializes the PCI bus and all the important devices it knows about, (in particular VGA display) – then it searches for a bootable device such ...
Lecture 15 - NCSU COE People
... Problems not solved by the basic von Neumann architecture: • Size of operating system. When the size of the OS changes, all programs may have to be recompiled. • Size of address space. Programs cannot be larger than physical memory, since there is no way to generate an address larger than the maximu ...
... Problems not solved by the basic von Neumann architecture: • Size of operating system. When the size of the OS changes, all programs may have to be recompiled. • Size of address space. Programs cannot be larger than physical memory, since there is no way to generate an address larger than the maximu ...
Review of Computer Organisation. Programs and Development
... protection between programs – Each program operates as if it were the only program on the computer, occupying a full set of the address space in its virtual space. The OS is translating memory addresses that the program references into physical addresses used by the memory system. – As long as two p ...
... protection between programs – Each program operates as if it were the only program on the computer, occupying a full set of the address space in its virtual space. The OS is translating memory addresses that the program references into physical addresses used by the memory system. – As long as two p ...
Principles of Operating System
... definition we will use • The kernel itself is an executable; on Linux, this executable is located at /boot/vmlinuz ...
... definition we will use • The kernel itself is an executable; on Linux, this executable is located at /boot/vmlinuz ...
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 ...
Official Syllabus
... We will be using Piazza for class discussion. The system is catered to getting you help fast and efficiently from classmates, the Graduate Assistant, and the instructor. Rather than emailing questions to the teaching staff, please post your questions on Piazza. Find our class discussion forum page o ...
... We will be using Piazza for class discussion. The system is catered to getting you help fast and efficiently from classmates, the Graduate Assistant, and the instructor. Rather than emailing questions to the teaching staff, please post your questions on Piazza. Find our class discussion forum page o ...
Operating systems. History. Function. Organization. Software
... with the controllers to carry out operations on peripheral devices connected to the computer • Each driver is specifically designed for its type of device (e.g. printer, monitor, etc..) and translates generic requests into device specific sequence of operations ...
... with the controllers to carry out operations on peripheral devices connected to the computer • Each driver is specifically designed for its type of device (e.g. printer, monitor, etc..) and translates generic requests into device specific sequence of operations ...
Document
... with the controllers to carry out operations on peripheral devices connected to the computer • Each driver is specifically designed for its type of device (e.g. printer, monitor, etc..) and translates generic requests into device specific sequence of operations ...
... with the controllers to carry out operations on peripheral devices connected to the computer • Each driver is specifically designed for its type of device (e.g. printer, monitor, etc..) and translates generic requests into device specific sequence of operations ...
Document
... – File-system manipulation – program capability to read, write, create, and delete files, (permission management) – 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 me ...
... – File-system manipulation – program capability to read, write, create, and delete files, (permission management) – 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 me ...
ppt
... • Operator batches jobs together and places them on an input device • Each program branches back to the monitor when finished • Monitor runs in kernel mode, user jobs run in user mode • Example: IBM 701 (~1953) ...
... • Operator batches jobs together and places them on an input device • Each program branches back to the monitor when finished • Monitor runs in kernel mode, user jobs run in user mode • Example: IBM 701 (~1953) ...
Lecture 2
... • Another set of OS functions exists for ensuring the efficient operation of the system itself via resource sharing – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - CPU cycles, main memory, file ...
... • Another set of OS functions exists for ensuring the efficient operation of the system itself via resource sharing – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - CPU cycles, main memory, file ...
Thomas Edison Associates Report on how to install and optimizing
... Install and test a new operating system such as Windows 7 or XP We have installed Ubuntu 8.10 in a PC which has all the required hardware needs. The installation didn't start because the CD Rom was not working correctly. We changed the CD ROM drive twice in order to start the installation. Installat ...
... Install and test a new operating system such as Windows 7 or XP We have installed Ubuntu 8.10 in a PC which has all the required hardware needs. The installation didn't start because the CD Rom was not working correctly. We changed the CD ROM drive twice in order to start the installation. Installat ...
CMSC 104 - Computer Science and Electrical Engineering
... data is lost. “If car-makers … and they would disappear as soon as we turned off the engine.” There are non-volatile memory systems. ...
... data is lost. “If car-makers … and they would disappear as soon as we turned off the engine.” There are non-volatile memory systems. ...
Introduction to Object Technology
... space, divided in fixed-size pages – Page states: • Available: Pages not currently used by the process • Reserved: Set of contiguous pages set aside for the process, but not counted as part of process quota until used. Committed to to process when it needs to write into memory • Committed: Pages for ...
... space, divided in fixed-size pages – Page states: • Available: Pages not currently used by the process • Reserved: Set of contiguous pages set aside for the process, but not counted as part of process quota until used. Committed to to process when it needs to write into memory • Committed: Pages for ...
Fulltext PDF
... device address, and then to physical addresses of I/O ports or bus controllers. This mapping may occur within the file-system ...
... device address, and then to physical addresses of I/O ports or bus controllers. This mapping may occur within the file-system ...
process - United International College
... • Treats page frames allocated to a process as a circular buffer • Pages are removed in round-robin style – Simplest replacement policy to implement ...
... • Treats page frames allocated to a process as a circular buffer • Pages are removed in round-robin style – Simplest replacement policy to implement ...
Chapter 10 - personal.kent.edu
... Roles of an Operating System Operating system System software that – manages computer resources, such as memory and input/output devices – provides an interface through which a human can interact with the computer – allows an application program to interact with these other system resources ...
... Roles of an Operating System Operating system System software that – manages computer resources, such as memory and input/output devices – provides an interface through which a human can interact with the computer – allows an application program to interact with these other system resources ...