ch4_15_Nov - Parent Directory
... Parent may terminate execution of children processes (abort ()). Why would parent do that? Child has exceeded allocated resources. Task assigned to child is no longer required. Parent is exiting. • Operating system does not allow child to continue if its parent terminates. • Cascading termi ...
... Parent may terminate execution of children processes (abort ()). Why would parent do that? Child has exceeded allocated resources. Task assigned to child is no longer required. Parent is exiting. • Operating system does not allow child to continue if its parent terminates. • Cascading termi ...
CS 2257 -
... o Students scribbling on the desk and mishandling the chairs. o Students using mobile phones inside the laboratory. o Students making noise inside the laboratory. ...
... o Students scribbling on the desk and mishandling the chairs. o Students using mobile phones inside the laboratory. o Students making noise inside the laboratory. ...
Osprey: Operating System for Predictable Clouds
... Abstract—Cloud computing is currently based on hardware virtualization wherein a host operating system provides a virtual machine interface nearly identical to that of physical hardware to guest operating systems. Full transparency allows backward compatibility with legacy software but introduces un ...
... Abstract—Cloud computing is currently based on hardware virtualization wherein a host operating system provides a virtual machine interface nearly identical to that of physical hardware to guest operating systems. Full transparency allows backward compatibility with legacy software but introduces un ...
UNIX Software Tools
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
What is an Operating System? - University of Central Florida
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
class slides (PowerPoint)
... Incremented each clock interrupt: 100 sec-1 Halved for all processes: 1 sec-1 OS Fall’02 ...
... Incremented each clock interrupt: 100 sec-1 Halved for all processes: 1 sec-1 OS Fall’02 ...
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall
... Recommended that you use Windows ?? “Upgrade Advisor” – Can download this program. It scans your computer to see what software (and drivers for hardware) are on your computer and whether compatible with Win 7. – Then if software not compatible, you need to research it to find its update -- or uninst ...
... Recommended that you use Windows ?? “Upgrade Advisor” – Can download this program. It scans your computer to see what software (and drivers for hardware) are on your computer and whether compatible with Win 7. – Then if software not compatible, you need to research it to find its update -- or uninst ...
chapter05
... • System administrators set up password protected accounts • Group policies automatically assigns rights/privileges Connecting with Computer Science ...
... • System administrators set up password protected accounts • Group policies automatically assigns rights/privileges Connecting with Computer Science ...
CS 519 -- Operating Systems -
... Blocking: process is suspended until all bytes in the count field are read or written E.g., for a network device, if the user wrote 1000 bytes, then the operating system would write the bytes to the device one at a time until the write() completed. + Easy to use and understand - if the device just c ...
... Blocking: process is suspended until all bytes in the count field are read or written E.g., for a network device, if the user wrote 1000 bytes, then the operating system would write the bytes to the device one at a time until the write() completed. + Easy to use and understand - if the device just c ...
![[slides] Case study: Linux](http://s1.studyres.com/store/data/008426094_1-33a53a235a0b160ad065c81f93e7bd9c-300x300.png)
[slides] Case study: Linux
... thread is simply a new process that happens to share the same address space as its parent A distinction is only made when a new thread is created by the clone ...
... thread is simply a new process that happens to share the same address space as its parent A distinction is only made when a new thread is created by the clone ...
Chapter 3
... secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation ...
... secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation ...
ch2
... loaders, linkage editors, and overlay-loaders, debugging systems for higher-level and machine language Communications - Provide the mechanism for creating virtual connections among processes, users, and computer systems Allow users to send messages to one another’s screens, browse web pages, sen ...
... loaders, linkage editors, and overlay-loaders, debugging systems for higher-level and machine language Communications - Provide the mechanism for creating virtual connections among processes, users, and computer systems Allow users to send messages to one another’s screens, browse web pages, sen ...
COSC A365 Chapter 2
... Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register This approach taken by Linux and ...
... Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register This approach taken by Linux and ...
Microkernels
... 2. Recovery: Automatic recovery after extension failure so applications can continue execution. 3. Backwards compatibility: Extensions should not have to be rewritten to use Nooks. ...
... 2. Recovery: Automatic recovery after extension failure so applications can continue execution. 3. Backwards compatibility: Extensions should not have to be rewritten to use Nooks. ...
ITFN 2601 Introduction to Operating Systems
... Threads handle all execution activities A thread is a program counter, a stack, and a set of registers Thread creation is relatively cheap in terms of CPU costs ...
... Threads handle all execution activities A thread is a program counter, a stack, and a set of registers Thread creation is relatively cheap in terms of CPU costs ...
Operating Systems Introduction
... cause problems only for the one program running. if a process gets stuck in an infinite loop, this loop could prevent the correct operation of many other processes. in a multiprogramming system, one erroneous program might modify another program, the data of another program, or even the op ...
... cause problems only for the one program running. if a process gets stuck in an infinite loop, this loop could prevent the correct operation of many other processes. in a multiprogramming system, one erroneous program might modify another program, the data of another program, or even the op ...
Mini OS User`s Guide
... You may invoke non-reentrant functions from multiple tasks if you ensure that they are not called recursively (simultaneously). Usually this means that your non-reentrant functions may not call any Mini OS system functions. C functions which only use registers for parameter and automatic variables a ...
... You may invoke non-reentrant functions from multiple tasks if you ensure that they are not called recursively (simultaneously). Usually this means that your non-reentrant functions may not call any Mini OS system functions. C functions which only use registers for parameter and automatic variables a ...
Real-time operating system survey
... For multiple threads to communicate among each other, in a timely fashion, predictable inter-thread communication and synchronization mechanisms are required. Also, supported should be the ability to lock/unlock resources to achieve data integrity. ...
... For multiple threads to communicate among each other, in a timely fashion, predictable inter-thread communication and synchronization mechanisms are required. Also, supported should be the ability to lock/unlock resources to achieve data integrity. ...
Towards Trustworthy Virtualisation Environments: Xen Library OS
... Our aim is to minimise the TCB of applications, which means that we wish to minimise the system code in critical domains to just what is needed by the domain’s application code. This suggests that we should implement a library operating system, like that proposed for the Exokernel architecture [8]. ...
... Our aim is to minimise the TCB of applications, which means that we wish to minimise the system code in critical domains to just what is needed by the domain’s application code. This suggests that we should implement a library operating system, like that proposed for the Exokernel architecture [8]. ...
ppt
... secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation ...
... secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation ...
slides
... • Bob may be allowed to read files that Alice cannot. • Alice may be permitted to use a printer that Bob cannot. ...
... • Bob may be allowed to read files that Alice cannot. • Alice may be permitted to use a printer that Bob cannot. ...
Module 7: Process Synchronization
... Resource types R1, R2, . . ., Rm CPU cycles, memory space, I/O devices Each resource type Ri has Wi instances. Each process utilizes a resource as follows: request use release ...
... Resource types R1, R2, . . ., Rm CPU cycles, memory space, I/O devices Each resource type Ri has Wi instances. Each process utilizes a resource as follows: request use release ...