Operating Systems ECE344
... • User-level threads are small and fast • A thread is simply represented by a PC, registers, stack, and small thread control block (TCB) • Creating a new thread, switching between threads, and synchronizing threads are done via procedure call ...
... • User-level threads are small and fast • A thread is simply represented by a PC, registers, stack, and small thread control block (TCB) • Creating a new thread, switching between threads, and synchronizing threads are done via procedure call ...
Department of Computer Science and Engineering
... run as a server may omit all graphical environments from the standard install, and instead include other software to set up and operate a solution stack such as LAMP. Because Linux is freely redistributable, anyone may create a distribution for any intended use. ...
... run as a server may omit all graphical environments from the standard install, and instead include other software to set up and operate a solution stack such as LAMP. Because Linux is freely redistributable, anyone may create a distribution for any intended use. ...
Chapter 22 - Windows XP
... The authentication package authenticates users whenever they attempt to access an object in the system ...
... The authentication package authenticates users whenever they attempt to access an object in the system ...
Operating-System Structures
... maintain, as well as flexible, reliable, error-free, and efficient ...
... maintain, as well as flexible, reliable, error-free, and efficient ...
Windows 95/98/NT (Introduction)
... 2 GB is shared, while the lower 2 GB is private to the application. This virtual address space is divided into equal blocks (or pages). • MS-DOS Mode support. Provides support for MS-DOS-based applications which must have exclusive access to the hardware. When an MS-DOS-based application runs in thi ...
... 2 GB is shared, while the lower 2 GB is private to the application. This virtual address space is divided into equal blocks (or pages). • MS-DOS Mode support. Provides support for MS-DOS-based applications which must have exclusive access to the hardware. When an MS-DOS-based application runs in thi ...
RHEL High Level Design Version 1.3
... This document is provided “AS IS” with no express or implied warranties. Use the information in this document at your own risk. This document may be reproduced or distributed in any form without prior permission provided the copyright notice is retained on all copies. Modified versions of this docum ...
... This document is provided “AS IS” with no express or implied warranties. Use the information in this document at your own risk. This document may be reproduced or distributed in any form without prior permission provided the copyright notice is retained on all copies. Modified versions of this docum ...
ppt
... Responsibilities of the Operating System °Three characteristics of the I/O systems: • The I/O system is shared by multiple program using the processor • I/O systems often use interrupts to communicate information about I/O operations. - Interrupts must be handled by the OS because they cause a tran ...
... Responsibilities of the Operating System °Three characteristics of the I/O systems: • The I/O system is shared by multiple program using the processor • I/O systems often use interrupts to communicate information about I/O operations. - Interrupts must be handled by the OS because they cause a tran ...
I/O Management - rtsys.informatik.uni
... – Signal on IR x line sets bit in Interrupt Request Register (IRR) – IRR bit is forwarded to Interrupt Service Register (ISR) on INTA unless masked by corresponding bit in Interrupt Mask Register – ISR bit is cleared by issuing an EOI command to the controller © N. Luttenberger ...
... – Signal on IR x line sets bit in Interrupt Request Register (IRR) – IRR bit is forwarded to Interrupt Service Register (ISR) on INTA unless masked by corresponding bit in Interrupt Mask Register – ISR bit is cleared by issuing an EOI command to the controller © N. Luttenberger ...
introduction to unix system
... With other operating systems, additional software must be purchased for networking. With Unix, networking capability is simply part of the operating system. Unix is ideal for such things as world wide e-mail and connecting to the Internet. • Unix was founded on what could be called a "small is good" ...
... With other operating systems, additional software must be purchased for networking. With Unix, networking capability is simply part of the operating system. Unix is ideal for such things as world wide e-mail and connecting to the Internet. • Unix was founded on what could be called a "small is good" ...
OperatingSystems_FA15_8_Memory
... Memory Management Memory Management Techniques Fixed Partition Partitions can be equal-sized or different sizes. Any process whose size is less than or equal to the partition size can be loaded into any available partition. Process does not fit in a partition must be coded with overlays so that ...
... Memory Management Memory Management Techniques Fixed Partition Partitions can be equal-sized or different sizes. Any process whose size is less than or equal to the partition size can be loaded into any available partition. Process does not fit in a partition must be coded with overlays so that ...
Lecture 8
... there exist some processes that wish to enter their critical section, then the selection of the processes that will enter the critical section next cannot be postponed indefinitely 3. Bounded Waiting - A bound must exist on the number of times that other processes are allowed to enter their critical ...
... there exist some processes that wish to enter their critical section, then the selection of the processes that will enter the critical section next cannot be postponed indefinitely 3. Bounded Waiting - A bound must exist on the number of times that other processes are allowed to enter their critical ...
1.1. The UNIX Operating System
... Ken Thompson, who was a researcher at Bell Labs, to have a go at writing a simpler operating system himself. He wrote a simpler version of MULTICS on a PDP7 in assembler and called his attempt UNICS (Uniplexed Information and Computing System). Because memory and CPU power were at a premium in those ...
... Ken Thompson, who was a researcher at Bell Labs, to have a go at writing a simpler operating system himself. He wrote a simpler version of MULTICS on a PDP7 in assembler and called his attempt UNICS (Uniplexed Information and Computing System). Because memory and CPU power were at a premium in those ...
unit-1-The-UNIX-Operating-System
... commercial companies. UNIX flavors based on SYSV have traditionally been more conservative, but better supported than BSD-based flavors. Until recently, UNIX standards were nearly as numerous as its variants. In early days, AT&T published a document called System V Interface Definition (SVID). X/OPE ...
... commercial companies. UNIX flavors based on SYSV have traditionally been more conservative, but better supported than BSD-based flavors. Until recently, UNIX standards were nearly as numerous as its variants. In early days, AT&T published a document called System V Interface Definition (SVID). X/OPE ...
Lecture 04 Operating System
... Both M:M and Two-level models require communication to maintain the appropriate number of kernel threads allocated to the application ...
... Both M:M and Two-level models require communication to maintain the appropriate number of kernel threads allocated to the application ...
Midterm1 Subject
... and on most computers it is the smallest convenient chunk of storage. For example, most computers don’t have an instruction to move a bit but do have one to move a byte. A less common term is word, which is a given computer architecture’s native unit of data. A word is made up of one or more bytes. ...
... and on most computers it is the smallest convenient chunk of storage. For example, most computers don’t have an instruction to move a bit but do have one to move a byte. A less common term is word, which is a given computer architecture’s native unit of data. A word is made up of one or more bytes. ...
threads
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
lecture.9
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
Ans What is operating system
... 18) Which technique was introduced because a single job could not keep both the CPU and the I/O devices busy? 1 Time-sharing 2 SPOOLing 3 Preemptive scheduling 4 Multiprogramming Ans ) 4 19) A critical region 1 is a piece of code which only one process executes at a time 2 is a region prone to deadl ...
... 18) Which technique was introduced because a single job could not keep both the CPU and the I/O devices busy? 1 Time-sharing 2 SPOOLing 3 Preemptive scheduling 4 Multiprogramming Ans ) 4 19) A critical region 1 is a piece of code which only one process executes at a time 2 is a region prone to deadl ...
I/O Systems
... Without I/O, computers are useless (disembodied brains?) But… thousands of devices, each slightly different How can we standardize the interfaces to these devices? Devices unreliable: media failures and transmission errors How can we make them reliable??? Devices unpredictable and/or slo ...
... Without I/O, computers are useless (disembodied brains?) But… thousands of devices, each slightly different How can we standardize the interfaces to these devices? Devices unreliable: media failures and transmission errors How can we make them reliable??? Devices unpredictable and/or slo ...
Intro to CS162
... – Provide clean, easy to use abstractions of physical resources » Infinite memory, dedicated machine » Higher level objects: files, users, messages » Masking limitations, virtualization ...
... – Provide clean, easy to use abstractions of physical resources » Infinite memory, dedicated machine » Higher level objects: files, users, messages » Masking limitations, virtualization ...
ppt
... Page fault executes when memory access error System call executes via trap to trigger kernel to execute ...
... Page fault executes when memory access error System call executes via trap to trigger kernel to execute ...
How Hyper-Threading Technology
... increasing the utilization of the on-chip resources available in the Intel® NetBurst™ microarchitecture. The Intel NetBurst microarchitecture provides optimal performance when executing a single instruction stream. A typical thread of code with a typical mix of Intel® IA-32based instructions, howeve ...
... increasing the utilization of the on-chip resources available in the Intel® NetBurst™ microarchitecture. The Intel NetBurst microarchitecture provides optimal performance when executing a single instruction stream. A typical thread of code with a typical mix of Intel® IA-32based instructions, howeve ...
CS-703 Advance Operating Systems
... • Time multiplexing involves different programs taking turns in using the resource. Example: CPU scheduling, printer sharing. • Space multiplexing involves different program getting part of the resource possibly at the same time. Example: memory is divided into several running programs. The major OS ...
... • Time multiplexing involves different programs taking turns in using the resource. Example: CPU scheduling, printer sharing. • Space multiplexing involves different program getting part of the resource possibly at the same time. Example: memory is divided into several running programs. The major OS ...