Exception Handling in the Choices Operating System
... Unlike the x86 architecture, which detects a large set of processor exceptions such as divide-by-zero, protection faults, device unavailable, invalid opcode, alignment checks and so on, the ARM processor only classifies exceptions into three types. The C++ exception class hierarchy in Choices for th ...
... Unlike the x86 architecture, which detects a large set of processor exceptions such as divide-by-zero, protection faults, device unavailable, invalid opcode, alignment checks and so on, the ARM processor only classifies exceptions into three types. The C++ exception class hierarchy in Choices for th ...
Operating Systems, 082
... I/O devices and CPU can execute concurrently CPU moves data between main memory and device controllers' buffers (done by device drivers) Device controllers interrupt upon completion Interrupts or Traps enable mode switching Operating systems are interrupt-driven Traps/signals: software i ...
... I/O devices and CPU can execute concurrently CPU moves data between main memory and device controllers' buffers (done by device drivers) Device controllers interrupt upon completion Interrupts or Traps enable mode switching Operating systems are interrupt-driven Traps/signals: software i ...
Process Description and Control
... • The processor state information portion will typically be initialized with most entries zero,except for the program counter(set to the program entry point) and system stack pointers (set to define the process stack boundaries). • The process control information portion is initialized based on std ...
... • The processor state information portion will typically be initialized with most entries zero,except for the program counter(set to the program entry point) and system stack pointers (set to define the process stack boundaries). • The process control information portion is initialized based on std ...
Chapter 2
... The RAM address space is shared; No memory protection from each other The stacks of each thread are intended to be in separate RAM, but if one thread has a problem (e.g., with pointers or array addressing), it could write over the stack of another thread ...
... The RAM address space is shared; No memory protection from each other The stacks of each thread are intended to be in separate RAM, but if one thread has a problem (e.g., with pointers or array addressing), it could write over the stack of another thread ...
Dept. of Computer Science Engineering, School of Engineering
... entity, passive entity. 3. What a program counter will contain? ANS: it contains the address of next instruction to be executed, and set of associated resources. ...
... entity, passive entity. 3. What a program counter will contain? ANS: it contains the address of next instruction to be executed, and set of associated resources. ...
Slides
... exclusiveLock = ch.lock(0, raf.length()/2, EXCLUSIVE); /** Now modify the data . . . */ // release the lock ...
... exclusiveLock = ch.lock(0, raf.length()/2, EXCLUSIVE); /** Now modify the data . . . */ // release the lock ...
Module 6: CPU Scheduling
... If there are n processes in the ready queue and the time quantum is q, then each process gets 1/n of the CPU time in chunks of at most q time units at once. No process waits more than (n-1)q time units. ...
... If there are n processes in the ready queue and the time quantum is q, then each process gets 1/n of the CPU time in chunks of at most q time units at once. No process waits more than (n-1)q time units. ...
Networks of Workstations - Washington University in St. Louis
... The latter mode aides in eliminating typical devices (local disk, serial port and ethernet) and has forced a split from the community OS development path. Finally, (something which is not really recognized), the niche occupied is too narrow as it aims at high performance in certain applications wher ...
... The latter mode aides in eliminating typical devices (local disk, serial port and ethernet) and has forced a split from the community OS development path. Finally, (something which is not really recognized), the niche occupied is too narrow as it aims at high performance in certain applications wher ...
Introduction to Linux
... 8-Setup Linux for scientific purpose start with Linux (tutorial session) ...
... 8-Setup Linux for scientific purpose start with Linux (tutorial session) ...
Microkernels
... (Slides include materials from Modern Operating Systems, 3rd ed., by Andrew Tanenbaum and from Operating System Concepts, 7th ed., by Silbershatz, Galvin, & Gagne) ...
... (Slides include materials from Modern Operating Systems, 3rd ed., by Andrew Tanenbaum and from Operating System Concepts, 7th ed., by Silbershatz, Galvin, & Gagne) ...
Module 4: Processes
... Provide a library entirely in user space with no kernel support. All code and data structures for the library exist in user space. Invoking a function in the library results in a local function call in user space and not a ...
... Provide a library entirely in user space with no kernel support. All code and data structures for the library exist in user space. Invoking a function in the library results in a local function call in user space and not a ...
CS 571 Operating Systems - GMU Computer Science
... information at (close to) memory speeds.! Device controller transfers blocks of data from buffer storage directly to main memory without CPU intervention.! Only one interrupt is generated per block, rather than one interrupt per byte/word.! ...
... information at (close to) memory speeds.! Device controller transfers blocks of data from buffer storage directly to main memory without CPU intervention.! Only one interrupt is generated per block, rather than one interrupt per byte/word.! ...
operating system design
... Since multiple users can be logged into a computer at the same time, the operating system needs to provide mechanisms to keep them separated. One user may not interfere with another. The process concept is widely used to group resources together for protection purposes. Files and other data structur ...
... Since multiple users can be logged into a computer at the same time, the operating system needs to provide mechanisms to keep them separated. One user may not interfere with another. The process concept is widely used to group resources together for protection purposes. Files and other data structur ...
Threads
... • When a traditional, single-threaded program requests a service from the operating system, it must wait for that service to complete, often leaving the CPU idle • Multithreading provides progress even though one or more threads wait for an event as long as other threads are active Ceng 334 - Operat ...
... • When a traditional, single-threaded program requests a service from the operating system, it must wait for that service to complete, often leaving the CPU idle • Multithreading provides progress even though one or more threads wait for an event as long as other threads are active Ceng 334 - Operat ...
slides.02.pdf
... Idea: Sometimes you want something as a process in order to structure your application, but you don’t want the overhead that goes with it ⇒ make use of threads. Basic idea: Threads also share resources, but only within the same process ⇒ resource management is completely left outside the control of ...
... Idea: Sometimes you want something as a process in order to structure your application, but you don’t want the overhead that goes with it ⇒ make use of threads. Basic idea: Threads also share resources, but only within the same process ⇒ resource management is completely left outside the control of ...
Chapter 5: Synchronization
... message passing) or indirectly (by shared memory) work together; may affect the execution of each other. ...
... message passing) or indirectly (by shared memory) work together; may affect the execution of each other. ...
CH4
... Information associated with each process. Process state: The state may be new, ready, running, waiting, halted, and SO on. Program counter: The counter indicates the address of the next instruction to be executed for this process. CPU registers: The registers vary in number and type, depending ...
... Information associated with each process. Process state: The state may be new, ready, running, waiting, halted, and SO on. Program counter: The counter indicates the address of the next instruction to be executed for this process. CPU registers: The registers vary in number and type, depending ...
Operating System
... 1. Single-user, dedicated. Previously thought as individuals have sole use of computer, do not need advanced CPU utilization, protection features (see Fig. 1.3). 2. Not still true. May run several different types of OS (Windows, Mac OS X, UNIX, and Linux) which offer multitasking and virtual memory ...
... 1. Single-user, dedicated. Previously thought as individuals have sole use of computer, do not need advanced CPU utilization, protection features (see Fig. 1.3). 2. Not still true. May run several different types of OS (Windows, Mac OS X, UNIX, and Linux) which offer multitasking and virtual memory ...
Operating Systems and File Management
... 041500 Time Machine is synchronization software used for backup on Macs. 041600 To repopulate a new hard disk from an incremental backup, you have to first restore a full backup. 041700 A boot disk contains a complete copy of your computer’s hard disk as it existed when the computer was new. C ...
... 041500 Time Machine is synchronization software used for backup on Macs. 041600 To repopulate a new hard disk from an incremental backup, you have to first restore a full backup. 041700 A boot disk contains a complete copy of your computer’s hard disk as it existed when the computer was new. C ...
Operating Systems File System File System File System Functions
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
Module 6: CPU Scheduling - Simon Fraser University
... Dispatch latency – time it takes for the dispatcher to stop one process ...
... Dispatch latency – time it takes for the dispatcher to stop one process ...
P - Bilkent University Computer Engineering Department
... We are considering a worst-case situation here. Even in the worst case (process requests up their maximum at the moment), we don’t have deadlock in a safe state. ...
... We are considering a worst-case situation here. Even in the worst case (process requests up their maximum at the moment), we don’t have deadlock in a safe state. ...
Module 7: Process Synchronization
... Algorithm for Process Pi do { flag[i] = TRUE; turn = j; while (flag[j] && turn == j); critical section flag[i] = FALSE; remainder section } while (TRUE); ...
... Algorithm for Process Pi do { flag[i] = TRUE; turn = j; while (flag[j] && turn == j); critical section flag[i] = FALSE; remainder section } while (TRUE); ...