OPERATING- SYSTEM CONCEPTS with Java
... frame, it may cause a breakdown of the entire system it is running. Therefore when writing an operating system for a real-time system, the writer must be sure that his scheduling schemes don’t allow response time to exceed the time constraint. 1.11 Distinguish between the client-server and peer-to-p ...
... frame, it may cause a breakdown of the entire system it is running. Therefore when writing an operating system for a real-time system, the writer must be sure that his scheduling schemes don’t allow response time to exceed the time constraint. 1.11 Distinguish between the client-server and peer-to-p ...
The Application Kernel Approach - a Novel Approach for Adding
... the original kernel is unaware, is constructed to run on the other processors in the system while the original kernel continues to run on the boot processor. Applications execute on the other processors while system calls, page faults, etc., are redirected by the application kernel to the uniprocess ...
... the original kernel is unaware, is constructed to run on the other processors in the system while the original kernel continues to run on the boot processor. Applications execute on the other processors while system calls, page faults, etc., are redirected by the application kernel to the uniprocess ...
Multiprocessing with the Exokernel Operating System - PDOS
... multiprocessor systems. We are motivated by observations made by numerous researchers that traditional multiprocessor operating systems are not flexible enough to support high performance parallel applications. Poor integration between user-level threads and kernel [3], rigid communication abstracti ...
... multiprocessor systems. We are motivated by observations made by numerous researchers that traditional multiprocessor operating systems are not flexible enough to support high performance parallel applications. Poor integration between user-level threads and kernel [3], rigid communication abstracti ...
Process Description and Control
... Running – currently executing Ready – prepared to execute Blocked – cannot execute until some event occurs, e.g. I/O operation New – just created, typically not loaded into MM Exit – released from the pool of executable processes, either halt (completed) or aborted. ...
... Running – currently executing Ready – prepared to execute Blocked – cannot execute until some event occurs, e.g. I/O operation New – just created, typically not loaded into MM Exit – released from the pool of executable processes, either halt (completed) or aborted. ...
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ASPLOS 2014 [PDF]
... only used for occasional maintenance such as the initialization setup. Commonly, much of the involved software (libraries, drivers) and hardware is unpublished (black boxes). from ignoring the new interface and accessing the device directly. Simply put, the current state of the art with respect to a ...
... only used for occasional maintenance such as the initialization setup. Commonly, much of the involved software (libraries, drivers) and hardware is unpublished (black boxes). from ignoring the new interface and accessing the device directly. Simply put, the current state of the art with respect to a ...
SG9OS
... > If specific deadlines are not met this can lead to undesirable effect, loss of function, property or even life > Systems respond to external events so correct process ...
... > If specific deadlines are not met this can lead to undesirable effect, loss of function, property or even life > Systems respond to external events so correct process ...
Chapter 2 – Operating System Overview
... 9. T / F – A process can be defined as a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources. ANS: T 10. T / F – A virtual memory address typically consists of a page number and an offset within the page. ANS: T 11. T ...
... 9. T / F – A process can be defined as a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources. ANS: T 10. T / F – A virtual memory address typically consists of a page number and an offset within the page. ANS: T 11. T ...
Operating System Concepts
... slow performance Unlimited threads could exhaust system resources, such as CPU time or memory Solution: Thread Pools • Create a number of threads at process startup and place them in a pool where they await work Advantages: Usually slightly faster to service a request with an existing thread than cr ...
... slow performance Unlimited threads could exhaust system resources, such as CPU time or memory Solution: Thread Pools • Create a number of threads at process startup and place them in a pool where they await work Advantages: Usually slightly faster to service a request with an existing thread than cr ...
Chapter 3 Process Description and Control Operating
... Used to keep track of both main (real) and secondary (virtual) memory ...
... Used to keep track of both main (real) and secondary (virtual) memory ...
OPERATING SYSTEM : AN OVERVIEW – [UNIT
... multiprocessor system can be studied in Unit-1 of Block-3 of this course. Networking Operating System A networked computing system is a collection of physical interconnected computers. The operating system of each of the interconnected computers must contain, in addition to its own stand-alone funct ...
... multiprocessor system can be studied in Unit-1 of Block-3 of this course. Networking Operating System A networked computing system is a collection of physical interconnected computers. The operating system of each of the interconnected computers must contain, in addition to its own stand-alone funct ...
Lecture 13
... • What if multiple processes have a given file open? • Should they share one control structure or have one each? • In-memory structures typically contain a cursor pointer – Indicating how far into the file data has been read/written ...
... • What if multiple processes have a given file open? • Should they share one control structure or have one each? • In-memory structures typically contain a cursor pointer – Indicating how far into the file data has been read/written ...
TST - retis.sssup.it - Scuola Superiore Sant`Anna
... • Every processor supports an interrupt mechanism – The processor has a special pin, called “interrupt request (IRQ)” – Upon reception of a signal on the IRQ pin, • If interrupts are enabled, the processor suspends execution and invokes an “interrupt handler” routine • If interrupts are disabled, th ...
... • Every processor supports an interrupt mechanism – The processor has a special pin, called “interrupt request (IRQ)” – Upon reception of a signal on the IRQ pin, • If interrupts are enabled, the processor suspends execution and invokes an “interrupt handler” routine • If interrupts are disabled, th ...
Mutual Exclusion and Synchronization
... – Applicable to any number of processes on a single processor – Processes on multiple processors? • as long as processors share main memory ...
... – Applicable to any number of processes on a single processor – Processes on multiple processors? • as long as processors share main memory ...
PPT - ICGEB
... distribution, but uses virtual drives in RAM. • It can boot into either text or graphics mode (KDE Graphical User Interface desktop environment), requiring more memory in graphics mode. • The OS file system is a single, compressed, read-only file that uncompresses applications and utilities as requi ...
... distribution, but uses virtual drives in RAM. • It can boot into either text or graphics mode (KDE Graphical User Interface desktop environment), requiring more memory in graphics mode. • The OS file system is a single, compressed, read-only file that uncompresses applications and utilities as requi ...
PPT Chapter 07
... • Fair share: fraction of CPU time to be devoted to a group of processes from same user or application • Ensures an equitable use of the CPU by processes belonging to different users or different applications • Lottery scheduling is a technique for sharing a resource in a probabilistically fair mann ...
... • Fair share: fraction of CPU time to be devoted to a group of processes from same user or application • Ensures an equitable use of the CPU by processes belonging to different users or different applications • Lottery scheduling is a technique for sharing a resource in a probabilistically fair mann ...
threads
... Creating a large number of threads in a system can exhaust system resources Allocate a pool of thread’s Allocate available threads from the thread pool to a new “thread” Reduces thread creation time when a request arrives Thread-specific data Need for supporting private storage for threa ...
... Creating a large number of threads in a system can exhaust system resources Allocate a pool of thread’s Allocate available threads from the thread pool to a new “thread” Reduces thread creation time when a request arrives Thread-specific data Need for supporting private storage for threa ...
Embedding Object Files in an Existing Operating System: A Practical Approach
... which are implemented using different mechanisms in conventional operating system, are all handled in the same way in an Object-Oriented system. One of the OS components that, once implemented, clearly demonstrates the Object-Oriented concepts is the file storage. Generally, the implementation of Ob ...
... which are implemented using different mechanisms in conventional operating system, are all handled in the same way in an Object-Oriented system. One of the OS components that, once implemented, clearly demonstrates the Object-Oriented concepts is the file storage. Generally, the implementation of Ob ...
File System
... On success, the open() system call returns an index to the per-process open-file table – called file descriptor in UNIX systems and file handle in Windows systems – for subsequent use ...
... On success, the open() system call returns an index to the per-process open-file table – called file descriptor in UNIX systems and file handle in Windows systems – for subsequent use ...
Helios: Heterogeneous Multiprocessing with Satellite Kernels
... Satellite kernels are microkernels. Each satellite kernel is composed of a scheduler, a memory manager, a namespace manager, and code to coordinate communication between other kernels. All other traditional operating system drivers and services (e.g., a file system) execute as individual processes. ...
... Satellite kernels are microkernels. Each satellite kernel is composed of a scheduler, a memory manager, a namespace manager, and code to coordinate communication between other kernels. All other traditional operating system drivers and services (e.g., a file system) execute as individual processes. ...
Presentation - lsp4you.com
... Information from the file is accessed in order, one record after the other. Compilers, multimedia applications, sound files, etc. are the most common examples of programs using sequential access. In case of a read operation, the record at the location pointed by the file pointer is read and the file ...
... Information from the file is accessed in order, one record after the other. Compilers, multimedia applications, sound files, etc. are the most common examples of programs using sequential access. In case of a read operation, the record at the location pointed by the file pointer is read and the file ...
9. File Systems and I/O Management
... perform operations like creating, reading, writing/updating, deleting, renaming, truncating, and appending to a file. The reading and writing from a file can be sequential (from where the last read/write left off), or can be random access from a certain specified offset by seeking into the file at t ...
... perform operations like creating, reading, writing/updating, deleting, renaming, truncating, and appending to a file. The reading and writing from a file can be sequential (from where the last read/write left off), or can be random access from a certain specified offset by seeking into the file at t ...
Scheduling
... Each kernel half has a stack and saved registers. Many processes may be sleep()ing in the kernel. ...
... Each kernel half has a stack and saved registers. Many processes may be sleep()ing in the kernel. ...