Chapter 13 I/O Hardware
... I/O Requests to Hardware Operations Consider reading a file from disk for a process: Determine device holding file Translate name to device representation Physically read data from disk into buffer Make data available to requesting process Return control to process ...
... I/O Requests to Hardware Operations Consider reading a file from disk for a process: Determine device holding file Translate name to device representation Physically read data from disk into buffer Make data available to requesting process Return control to process ...
Operating-System Structures
... logical conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to ...
... logical conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to ...
comparison between smartphone operating systems
... operating system movement has grown to include competitors such as Apple, Google, RIM and Symbian. Although these operating system platforms have come a long way since their initiation, none of these companies provide an OS that is perfect for all users. They claim that their platforms perform the b ...
... operating system movement has grown to include competitors such as Apple, Google, RIM and Symbian. Although these operating system platforms have come a long way since their initiation, none of these companies provide an OS that is perfect for all users. They claim that their platforms perform the b ...
Interrupts and interrupt handlers - Washington University in St. Louis
... – Indicated by an electrical signal to a processor – On ARM, multiplexed by the Generic Interrupt ...
... – Indicated by an electrical signal to a processor – On ARM, multiplexed by the Generic Interrupt ...
Introduction - IDA.LiU.se
... § Multiprocessor systems with more than one CPU in close communication. • Soon the default, even for desktop machines (multi-core / CMP) § Tightly coupled system (aka. shared-memory system, multiprocessor) • processors share memory and a clock; • communication usually takes place through the shared ...
... § Multiprocessor systems with more than one CPU in close communication. • Soon the default, even for desktop machines (multi-core / CMP) § Tightly coupled system (aka. shared-memory system, multiprocessor) • processors share memory and a clock; • communication usually takes place through the shared ...
$doc.title
... ages when all computers were shared), interactive (as opposed to “batch”), and multi-tasking (sharing again). ...
... ages when all computers were shared), interactive (as opposed to “batch”), and multi-tasking (sharing again). ...
Figure 5.01
... It is more economical to create and context-switch threads. For example, in Solaris, creating a process is 30 times slower than creating a thread, and context switching a process is 5 times slower than context switching a thread ...
... It is more economical to create and context-switch threads. For example, in Solaris, creating a process is 30 times slower than creating a thread, and context switching a process is 5 times slower than context switching a thread ...
Design Challenges of Scalable Operating Systems for Many
... as the number of cores increased, fos showed better load scalability than Linux [21]. In summary, even though some new overhead is introduced, this approach does seem promising. Corey [8] takes a less drastic approach to reducing the number of required locks. Here, applications have to explicitly sp ...
... as the number of cores increased, fos showed better load scalability than Linux [21]. In summary, even though some new overhead is introduced, this approach does seem promising. Corey [8] takes a less drastic approach to reducing the number of required locks. Here, applications have to explicitly sp ...
Operating System Security
... There is a key used to encrypt the file How does the OS verifies the password ? Key needs to be somewhere in the system Key needs to be stored If file containing password can be stolen key also can be stolen Use one way hashing and salting – most flavors of unix systems use this method ...
... There is a key used to encrypt the file How does the OS verifies the password ? Key needs to be somewhere in the system Key needs to be stored If file containing password can be stolen key also can be stolen Use one way hashing and salting – most flavors of unix systems use this method ...
Structures - IDA.LiU.se - Linköpings universitet
... § “Lean kernel”: Moves as much service functionality as possible from the kernel into “user” space ...
... § “Lean kernel”: Moves as much service functionality as possible from the kernel into “user” space ...
Windows 2000
... operating system resources. Compatibility — applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on 2000 without changing the source code. Performance — 2000 subsystems can communicate with one another via high-performance message passing. Preemption of low priority ...
... operating system resources. Compatibility — applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on 2000 without changing the source code. Performance — 2000 subsystems can communicate with one another via high-performance message passing. Preemption of low priority ...
ch21
... operating system resources. Compatibility — applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on 2000 without changing the source code. Performance — 2000 subsystems can communicate with one another via high-performance message passing. Preemption of low priority ...
... operating system resources. Compatibility — applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on 2000 without changing the source code. Performance — 2000 subsystems can communicate with one another via high-performance message passing. Preemption of low priority ...
Device Interfaces - Flight Software Workshop
... • It will be hard to keep expanding the PSP API to support a growing collection of drivers for cFS applications - For example: Do we want to add the API for “Bob’s super GPS & Gyro module” if it will only be used on one platform? ...
... • It will be hard to keep expanding the PSP API to support a growing collection of drivers for cFS applications - For example: Do we want to add the API for “Bob’s super GPS & Gyro module” if it will only be used on one platform? ...
Exceptional Control Flow - Computer Systems: A Programmer`s
... where each ak is the address of some corresponding instruction Ik . Each transition from ak to ak+1 is called a control transfer. A sequence of such control transfers is called the flow of control, or control flow of the processor. The simplest kind of control flow is a “smooth” sequence where each ...
... where each ak is the address of some corresponding instruction Ik . Each transition from ak to ak+1 is called a control transfer. A sequence of such control transfers is called the flow of control, or control flow of the processor. The simplest kind of control flow is a “smooth” sequence where each ...
2. Operating System Case Study: Linux
... creation removal of files and provide directory maintenance For a multiuser system, every user should have its own right to access files and directories ...
... creation removal of files and provide directory maintenance For a multiuser system, every user should have its own right to access files and directories ...
No Slide Title
... Object names are structured like file path names in MS-DOS and UNIX XP implements a symbolic link object, which is similar to symbolic links ...
... Object names are structured like file path names in MS-DOS and UNIX XP implements a symbolic link object, which is similar to symbolic links ...
Amoeba Vs. Mach OS
... executed by any processor. Operating system emulation: To support the binary-level emulation of UNIX and other operating systems. Mach allows for the transparent redirection of operating system calls to emulation library calls and thence to user-level operating system servers. Flexible virtual memor ...
... executed by any processor. Operating system emulation: To support the binary-level emulation of UNIX and other operating systems. Mach allows for the transparent redirection of operating system calls to emulation library calls and thence to user-level operating system servers. Flexible virtual memor ...
ch1 - Towson University
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
ppt
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
Operating Systems Should Provide Transactions
... of the software stack. For instance, locks use mutual ex- consistent view of the filesystem namespace. clusion to provide consistency for user-level data strucThe inability of an application to consistently view and tures, and database transactions provide consistent updates update system resources ...
... of the software stack. For instance, locks use mutual ex- consistent view of the filesystem namespace. clusion to provide consistency for user-level data strucThe inability of an application to consistently view and tures, and database transactions provide consistent updates update system resources ...
ch2
... 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 - Some (such as CPU cycles, main ...
... 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 - Some (such as CPU cycles, main ...
What is an Operating System?
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
2. Operating Systems
... 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 either on the same computer or on different systems tied together by a network. Implemented via shared memory or mes ...
... 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 either on the same computer or on different systems tied together by a network. Implemented via shared memory or mes ...