lec01 - CSE @ UCR
... owns the machine and shares resources while making them seem better than they are Beautician that hides all the ugly low level details so that anyone can use a machine (e.g., smartphone!) Referee that arbitrates the available resources between the running programs efficiently, safely, fairly, and se ...
... owns the machine and shares resources while making them seem better than they are Beautician that hides all the ugly low level details so that anyone can use a machine (e.g., smartphone!) Referee that arbitrates the available resources between the running programs efficiently, safely, fairly, and se ...
CS 153 Design of Operating Systems
... owns the machine and shares resources while making them seem better than they are Beautician that hides all the ugly low level details so that anyone can use a machine (e.g., smartphone!) Referee that arbitrates the available resources between the running programs efficiently, safely, fairly, and se ...
... owns the machine and shares resources while making them seem better than they are Beautician that hides all the ugly low level details so that anyone can use a machine (e.g., smartphone!) Referee that arbitrates the available resources between the running programs efficiently, safely, fairly, and se ...
Unix Commands
... the permissions for a triplet. • We can do this by determining whether or not a permission is turned on or off. • If turned on, a permission gets a value of 1; if turned off, it gets a value of 0. ...
... the permissions for a triplet. • We can do this by determining whether or not a permission is turned on or off. • If turned on, a permission gets a value of 1; if turned off, it gets a value of 0. ...
Module 3: Operating-System Structures
... Moves as much from the kernel into “user” space. Communication takes place between user modules using ...
... Moves as much from the kernel into “user” space. Communication takes place between user modules using ...
Memory Protection: Kernel and User Address Spaces
... Multiprogramming Without Memory Protection When a program is copied into memory, a linker-loader alters the code of the program (e.g., loads, stores, and jumps) To use the address of where the program lands in memory This is kind of what happens when you run the command gcc –o [filename]. It ...
... Multiprogramming Without Memory Protection When a program is copied into memory, a linker-loader alters the code of the program (e.g., loads, stores, and jumps) To use the address of where the program lands in memory This is kind of what happens when you run the command gcc –o [filename]. It ...
Operating Systems History
... have the function to coordinate to the other parts of an OS such as : I/O Devices, Process, Memory and File Systems. • The structure of and OS could be different but in most of the time are very similar because some OS use Open Standards. ...
... have the function to coordinate to the other parts of an OS such as : I/O Devices, Process, Memory and File Systems. • The structure of and OS could be different but in most of the time are very similar because some OS use Open Standards. ...
History of Operating Systems
... Thrashing Example • In the 1970's IBM sold an operating system called System 370 • It was a multiprogramming virtual memory batch OS • They also sold VM, (Virtual Machine) which allowed customers to run more than one IBM OS at the same time • In one case a thrashing S370 system was resolved by runn ...
... Thrashing Example • In the 1970's IBM sold an operating system called System 370 • It was a multiprogramming virtual memory batch OS • They also sold VM, (Virtual Machine) which allowed customers to run more than one IBM OS at the same time • In one case a thrashing S370 system was resolved by runn ...
What Is Operating System? Operating Systems, System Calls, and Buffered I/O
... close closes a file descriptor, so that it no longer refers to any file and may be reused. Any locks held on the file it was associated with, and owned by the process, are removed (regardless of the file descriptor that was used to obtain the lock) . . . . ...
... close closes a file descriptor, so that it no longer refers to any file and may be reused. Any locks held on the file it was associated with, and owned by the process, are removed (regardless of the file descriptor that was used to obtain the lock) . . . . ...
ds2_arc
... requests to other servers. – A component for analyzing access patterns. – A component for managing the replication of Web pages. ...
... requests to other servers. – A component for analyzing access patterns. – A component for managing the replication of Web pages. ...
System Calls
... they were all hardware • A virtual machine provides an interface identical to the underlying bare hardware • The operating system host creates the illusion that a process has its own processor and (virtual memory) • Each guest provided with a (virtual) copy of underlying computer ...
... they were all hardware • A virtual machine provides an interface identical to the underlying bare hardware • The operating system host creates the illusion that a process has its own processor and (virtual memory) • Each guest provided with a (virtual) copy of underlying computer ...
Cindy - Anatomy of a Window
... order to understand how and where data is stored on the storage device(s). This chapter ...
... order to understand how and where data is stored on the storage device(s). This chapter ...
& inside: THE MAGAZINE OF USENIX & SAGE
... important are auditing, cleaner abstractions, and documentation. The TrustedBSD team found that security checks were often implemented differently in different areas of the kernel, which can lead to bugs. Watson discussed some of the lessons they had learned in the development process. They found th ...
... important are auditing, cleaner abstractions, and documentation. The TrustedBSD team found that security checks were often implemented differently in different areas of the kernel, which can lead to bugs. Watson discussed some of the lessons they had learned in the development process. They found th ...
9. Application/Kernel Interface
... All system calls defined in OS-specific header file Linux: /usr/include/sys/syscall.h (which includes /usr/include/bits/syscall.h) System call handlers are numbered C library wraps processor-specific parts into a plain function USER MODE ...
... All system calls defined in OS-specific header file Linux: /usr/include/sys/syscall.h (which includes /usr/include/bits/syscall.h) System call handlers are numbered C library wraps processor-specific parts into a plain function USER MODE ...
file
... • There are no "empty bytes" of disk space in between consecutive pieces of data • To access a specific record (piece of data), though, the C++ program must read through all of the former pieces of data ...
... • There are no "empty bytes" of disk space in between consecutive pieces of data • To access a specific record (piece of data), though, the C++ program must read through all of the former pieces of data ...
Chapter 13
... on the network. This reduces network traffic as a patch needs to be downloaded from the Internet only once, rather than to each specific computer. patch deployed many times across LAN patch downloaded once From Internet ...
... on the network. This reduces network traffic as a patch needs to be downloaded from the Internet only once, rather than to each specific computer. patch deployed many times across LAN patch downloaded once From Internet ...
Workloads: Types, Selection, Characterization
... Addressing modes, cache hit rates, pipelining Interference with other devices during ...
... Addressing modes, cache hit rates, pipelining Interference with other devices during ...
Operating Systems: Why Object-Oriented?
... however: buffer size, cache management, read ahead, write-through etc. The common mapping conflicts are also similar to those in the virtual memory case. If, for example, a client that makes highly-random access to single addresses of a large number of files, and then doesn’t read that location agai ...
... however: buffer size, cache management, read ahead, write-through etc. The common mapping conflicts are also similar to those in the virtual memory case. If, for example, a client that makes highly-random access to single addresses of a large number of files, and then doesn’t read that location agai ...
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights... McGraw-Hill Technology Education
... • Command line interfaces – Older interface • DOS, Linux, UNIX ...
... • Command line interfaces – Older interface • DOS, Linux, UNIX ...
Figure 15.1 A distributed multimedia system
... thread in Figure 6.5 would use queue.wait() to wait for incoming requests. synchronized methods (and code blocks) implement the monitor abstraction. The operations within a synchronized method are performed atomically with respect to other synchronized methods of the same object. synchronized should ...
... thread in Figure 6.5 would use queue.wait() to wait for incoming requests. synchronized methods (and code blocks) implement the monitor abstraction. The operations within a synchronized method are performed atomically with respect to other synchronized methods of the same object. synchronized should ...
CBA Software - Hoxie Public Schools
... Translators Computers cannot read program statements in programming language format, such as Visual Basic or Java program statements. Language translator programs convert English-like software programs into machine code that can be understood by the computer. Each converted English-like instruction ...
... Translators Computers cannot read program statements in programming language format, such as Visual Basic or Java program statements. Language translator programs convert English-like software programs into machine code that can be understood by the computer. Each converted English-like instruction ...
Your computer is already a distributed system. Why isn’t your...
... Cache coherence protocols encourage OS designers to selectively ignore this, except for limited performance reasons. Commodity OS designs have mostly assumed fixed, uniform CPU architectures and memory systems. It is time for researchers to abandon this approach and engage fully with the distributed ...
... Cache coherence protocols encourage OS designers to selectively ignore this, except for limited performance reasons. Commodity OS designs have mostly assumed fixed, uniform CPU architectures and memory systems. It is time for researchers to abandon this approach and engage fully with the distributed ...
Your computer is already a distributed system. Why isn’t your...
... Cache coherence protocols encourage OS designers to selectively ignore this, except for limited performance reasons. Commodity OS designs have mostly assumed fixed, uniform CPU architectures and memory systems. It is time for researchers to abandon this approach and engage fully with the distributed ...
... Cache coherence protocols encourage OS designers to selectively ignore this, except for limited performance reasons. Commodity OS designs have mostly assumed fixed, uniform CPU architectures and memory systems. It is time for researchers to abandon this approach and engage fully with the distributed ...
- jGyan.com
... hardware devices from the user • I/O subsystem responsible for ▫ Memory management of I/O including buffering (storing data temporarily while it is being transferred), caching (storing parts of data in faster storage for performance), spooling (the ...
... hardware devices from the user • I/O subsystem responsible for ▫ Memory management of I/O including buffering (storing data temporarily while it is being transferred), caching (storing parts of data in faster storage for performance), spooling (the ...