15 - Portland State University
... Then it wakes up, finishes, & returns The Interrupt Handler Does whatever is immediately necessary Then unblocks the driver Example: The BLITZ “DiskDriver” Start I/O and block (waits on semaphore) Interrupt routine signals the semaphore & returns ...
... Then it wakes up, finishes, & returns The Interrupt Handler Does whatever is immediately necessary Then unblocks the driver Example: The BLITZ “DiskDriver” Start I/O and block (waits on semaphore) Interrupt routine signals the semaphore & returns ...
No Slide Title
... • Synchronous - After I/O starts, control returns to user program only upon I/O completion. – wait instruction idles the CPU until the next interrupt – wait loop (contention for memory access). – At most one I/O request is outstanding at a time, no simultaneous I/O processing (for a single “thread”) ...
... • Synchronous - After I/O starts, control returns to user program only upon I/O completion. – wait instruction idles the CPU until the next interrupt – wait loop (contention for memory access). – At most one I/O request is outstanding at a time, no simultaneous I/O processing (for a single “thread”) ...
The Architecture of a Reliable Operating System,
... failed component should be automatically and transparently replaced by a fresh copy, and running user processes should not be affected. To achieve this goal, our system provides: simple, yet efficient and reliable IPC; disentangling of interrupt handling from user-mode device drivers; separation of ...
... failed component should be automatically and transparently replaced by a fresh copy, and running user processes should not be affected. To achieve this goal, our system provides: simple, yet efficient and reliable IPC; disentangling of interrupt handling from user-mode device drivers; separation of ...
Huawei Videoconferencing System Interoperates with Microsoft
... Microsoft Lync2010 to Improve Business Collaboration Video communication is becoming increasingly popular as an integral component of any collaboration system. However, enterprises are faced with an awkward situation where room-based videoconferencing systems cannot interoperate with unified communi ...
... Microsoft Lync2010 to Improve Business Collaboration Video communication is becoming increasingly popular as an integral component of any collaboration system. However, enterprises are faced with an awkward situation where room-based videoconferencing systems cannot interoperate with unified communi ...
Slide 1
... accessed by groups, users, or processes. A user or group would exist as a subject. Subjects access objects. ...
... accessed by groups, users, or processes. A user or group would exist as a subject. Subjects access objects. ...
PPT Chapter 01
... Same real resource may support several virtual ones Started with the use of virtual devices • E.g., a print server ...
... Same real resource may support several virtual ones Started with the use of virtual devices • E.g., a print server ...
Chapter 3 Operating Systems
... - with its own program counter indicating the next instruction to execute. Each process creates its own context (= process state). There may be more than one process for the same program (e.g., start two different editor programs). ...
... - with its own program counter indicating the next instruction to execute. Each process creates its own context (= process state). There may be more than one process for the same program (e.g., start two different editor programs). ...
OPERATING SYSTEMS DESIGN AND IMPLEMENTATION Third
... – Stable kernel (~4000 LoC) reduces number of fatal bugs ...
... – Stable kernel (~4000 LoC) reduces number of fatal bugs ...
REF Chapter 3: Windows NT System Specifics
... a user and an administrator level. It functions in a manner virtually identical to BASIS on other operating systems by employing a typical command line interface. The program items for Setup Kernels and Setup Kernel Directories are also available in the BASIS program group. By double clicking these ...
... a user and an administrator level. It functions in a manner virtually identical to BASIS on other operating systems by employing a typical command line interface. The program items for Setup Kernels and Setup Kernel Directories are also available in the BASIS program group. By double clicking these ...
Auditing (cont'd.) - Elgin Community College
... • A threat to privacy; makes systems unstable • Internet Explorer has been modified to run in a limited ...
... • A threat to privacy; makes systems unstable • Internet Explorer has been modified to run in a limited ...
document
... Mobsters101 – How to Intrude Resources • Exhaust, overload or consume Control Functions • Undermine direct control protocols ...
... Mobsters101 – How to Intrude Resources • Exhaust, overload or consume Control Functions • Undermine direct control protocols ...
Slide Set 1
... A thread, or thread of execution, is the set of instructions being executed in a process. In a single thread system each process has exactly one execution engine (the logical machine). In a multi-thread environment, a process may have many execution engines, one for each thread. Thus, each thread ha ...
... A thread, or thread of execution, is the set of instructions being executed in a process. In a single thread system each process has exactly one execution engine (the logical machine). In a multi-thread environment, a process may have many execution engines, one for each thread. Thus, each thread ha ...
Blue Coat Mail Threat Defense
... The solution can be deployed inline, as a cloud-based service or an on-premises appliance. It is typically positioned behind the firewall, after the SPAM filter, to ensure it can inspect all mail before it is delivered to the user. Note, the solution can also be deployed passively, alerting you as s ...
... The solution can be deployed inline, as a cloud-based service or an on-premises appliance. It is typically positioned behind the firewall, after the SPAM filter, to ensure it can inspect all mail before it is delivered to the user. Note, the solution can also be deployed passively, alerting you as s ...
Background - The University of Alabama in Huntsville
... • Somewhat slower than a traditional multiprocessor but faster than a single processor machine • To take advantage, the OS must support multiple threads and the software must be multi-threaded ...
... • Somewhat slower than a traditional multiprocessor but faster than a single processor machine • To take advantage, the OS must support multiple threads and the software must be multi-threaded ...
![Security Vulnerability Notice SE-2012-01-ORACLE-14 [Security vulnerabilities in Java SE, Issue 69#2]](http://s1.studyres.com/store/data/008909648_1-e7c700bd2d9f21ffa21cbc63abdfe55d-300x300.png)
Security Vulnerability Notice SE-2012-01-ORACLE-14 [Security vulnerabilities in Java SE, Issue 69#2]
... spoofing condition from our original POC code. When a request to load Class A is initiated by the lookup_CL (from Class Loader 2 namespace), its loading is delegated to the parent loader (member_CL). As a result, requested class definition is provided from Class Loader 1 namespace. However, successf ...
... spoofing condition from our original POC code. When a request to load Class A is initiated by the lookup_CL (from Class Loader 2 namespace), its loading is delegated to the parent loader (member_CL). As a result, requested class definition is provided from Class Loader 1 namespace. However, successf ...
Architectural Support for Operating Systems
... • In the idle loop: – OS executes an infinite loop (UNIX) – OS performs some system management & profiling – OS halts the processor and enter in low-power mode (notebooks) – OS computes some function (DEC’s VMS on VAX computed Pi) • OS wakes up on: – interrupts from hardware devices – traps from use ...
... • In the idle loop: – OS executes an infinite loop (UNIX) – OS performs some system management & profiling – OS halts the processor and enter in low-power mode (notebooks) – OS computes some function (DEC’s VMS on VAX computed Pi) • OS wakes up on: – interrupts from hardware devices – traps from use ...
Al- Balqa Applied University Al-huson University College Dept. of
... B) kernel is the first part of operating system to load into memory during booting C) kernel is made of various modules which can not be loaded in running operating system D) kernel remains in the memory during the entire computer session 19- Which one of the following error will be handle by the op ...
... B) kernel is the first part of operating system to load into memory during booting C) kernel is made of various modules which can not be loaded in running operating system D) kernel remains in the memory during the entire computer session 19- Which one of the following error will be handle by the op ...
Server Installation - gozips.uakron.edu
... recognized on the Internet In Linux, the hostname can exist on more than one computer ...
... recognized on the Internet In Linux, the hostname can exist on more than one computer ...
CITS2002 Systems Programming An Introduction to Operating
... Until system resources became more plentiful (and cheaper) attempts were made to maximize resource sharing - security was a consequent, not an initial, goal. e.g. process scheduling policies were dominated by already running processes requesting resources (such as libraries and tapes) that were alre ...
... Until system resources became more plentiful (and cheaper) attempts were made to maximize resource sharing - security was a consequent, not an initial, goal. e.g. process scheduling policies were dominated by already running processes requesting resources (such as libraries and tapes) that were alre ...
Chapter 14
... – Accepts typed commands – Executes commands • From system prompt • Issues appropriate responses ...
... – Accepts typed commands – Executes commands • From system prompt • Issues appropriate responses ...
Chapter 7 Deadlocks
... Link in Directory Tree Structure In modern OS, there are mechanism that allow a file to appear to be in different part of the tree structure than where it actually ...
... Link in Directory Tree Structure In modern OS, there are mechanism that allow a file to appear to be in different part of the tree structure than where it actually ...