process
... – shared memory - OS provides mechanisms that allow creation of a shared memory buffer between processes • shmget() creates a shared memory segment, using a name (key ID) • shmctl() to modify control information and permissions related to a shared memory segment • shmat() to attach a shared memory s ...
... – shared memory - OS provides mechanisms that allow creation of a shared memory buffer between processes • shmget() creates a shared memory segment, using a name (key ID) • shmctl() to modify control information and permissions related to a shared memory segment • shmat() to attach a shared memory s ...
Chapter 8 Operating Systems and Utility Programs Chapter 8
... • Floppy disk that contains system files that will start computer when hard disk becomes damaged and computer cannot boot • Also called repair disk, boot disk, or rescue disk ...
... • Floppy disk that contains system files that will start computer when hard disk becomes damaged and computer cannot boot • Also called repair disk, boot disk, or rescue disk ...
Operating Systems II
... need it at the right time – e.g. MPEG player application requires CPU every frame time. • Borrowed Virtual Time (BVT) uses a number of techniques to try to address this. – execution of threads measured in virtual time – for each thread ti maintain its actual virtual time Ai and effective virtual tim ...
... need it at the right time – e.g. MPEG player application requires CPU every frame time. • Borrowed Virtual Time (BVT) uses a number of techniques to try to address this. – execution of threads measured in virtual time – for each thread ti maintain its actual virtual time Ai and effective virtual tim ...
Embracing diversity in the Barrelfish manycore
... work in Barrelfish, Infokernel uses this technique in the context of an existing OS design, rather than looking at a new OS built around the concept. In the Exokernel [7], all fixed, high-level abstractions are avoided and all information about the underlying hardware (such as page numbers, free lis ...
... work in Barrelfish, Infokernel uses this technique in the context of an existing OS design, rather than looking at a new OS built around the concept. In the Exokernel [7], all fixed, high-level abstractions are avoided and all information about the underlying hardware (such as page numbers, free lis ...
memory is
... We provide guidance to what you should learn. (If you say “give us A without any exam or project”…) Most OS are implemented in C. Java hides many low-level details. This is a place to strengthen your C skills. ...
... We provide guidance to what you should learn. (If you say “give us A without any exam or project”…) Most OS are implemented in C. Java hides many low-level details. This is a place to strengthen your C skills. ...
Nagalaxmi Prasanna Gumpalli`s presentation on Enhancing
... capability-based access control mechanism in order to achieve security and fault tolerance. 2. Minix is a microkernel-based operating system explicitly designed for supporting restartability of its components. A reincarnation server keeps track of the system state and detects crashed components at t ...
... capability-based access control mechanism in order to achieve security and fault tolerance. 2. Minix is a microkernel-based operating system explicitly designed for supporting restartability of its components. A reincarnation server keeps track of the system state and detects crashed components at t ...
Processes and Threads
... By default, two separate processes have two separate memory images, and do not share any memory. (Note: a forked child has the same memory image as the parent at creation, but any changes made to the child’s memory will not be reflected in the parent.) Processes wishing to share memory can request t ...
... By default, two separate processes have two separate memory images, and do not share any memory. (Note: a forked child has the same memory image as the parent at creation, but any changes made to the child’s memory will not be reflected in the parent.) Processes wishing to share memory can request t ...
Chapter 14 Virtual Machines Operating Systems:
... Machine (JVM) is to provide a runtime space for a set of Java code to run on any operating system staged on any hardware platform without needing to make code changes to accommodate the different operating systems or hardware ...
... Machine (JVM) is to provide a runtime space for a set of Java code to run on any operating system staged on any hardware platform without needing to make code changes to accommodate the different operating systems or hardware ...
Lecture 15 - Department of Math and Computer Science
... History Linux is a modern, free operating system based on UNIX ...
... History Linux is a modern, free operating system based on UNIX ...
Using Linux Kernel Modules For Operating Systems Class Projects
... The second project is to write a program that reports the behavior of the system from the various files in the /proc file system. This project establishes an understanding of /proc files which are used in the kernel module projects. This is Lab 3.1 as described in Nutt's text book.7 The third projec ...
... The second project is to write a program that reports the behavior of the system from the various files in the /proc file system. This project establishes an understanding of /proc files which are used in the kernel module projects. This is Lab 3.1 as described in Nutt's text book.7 The third projec ...
Introduction to CS-4513
... • If (my distance to network > neighbor’s distance to network + my distance to neighbor), then … • … update my table entry for that network so that neighbor is ...
... • If (my distance to network > neighbor’s distance to network + my distance to neighbor), then … • … update my table entry for that network so that neighbor is ...
![[slides] Case study: Linux](http://s1.studyres.com/store/data/008426094_1-33a53a235a0b160ad065c81f93e7bd9c-300x300.png)
[slides] Case study: Linux
... First developed as a small but self-contained kernel in 1991 by Linus ...
... First developed as a small but self-contained kernel in 1991 by Linus ...
Slides - Department of Computer Science
... A part of the operating system. A process does not know about the transitions. ...
... A part of the operating system. A process does not know about the transitions. ...
OPERATING SYSTEMS:
... • Threads can share instructions (good for sharing, bad for protection) • Can threads overwrite OS functions? This (unprotected) model is common in: • Embedded applications • Windows 3.1/Early Macintosh (switch only with yield) • Windows 95—ME (switch with both yield and timer) ...
... • Threads can share instructions (good for sharing, bad for protection) • Can threads overwrite OS functions? This (unprotected) model is common in: • Embedded applications • Windows 3.1/Early Macintosh (switch only with yield) • Windows 95—ME (switch with both yield and timer) ...
Real-Time Operating System Design
... Most current operating systems are not suitable for developing or deploying applications with real-time constraints i.e. scheduling policies, process synchronization, system architecture ...
... Most current operating systems are not suitable for developing or deploying applications with real-time constraints i.e. scheduling policies, process synchronization, system architecture ...
Implementing Processes, Threads, and Resources
... OS Mechanisms to Handle Performance and Exclusive use of resources •Processor Modes - hardware mode bit is used to distinguish between OS and user instructions •Kernels - most critical part of OS placed in kernel (trusted software module) •Method of invoking system service - calling a system functio ...
... OS Mechanisms to Handle Performance and Exclusive use of resources •Processor Modes - hardware mode bit is used to distinguish between OS and user instructions •Kernels - most critical part of OS placed in kernel (trusted software module) •Method of invoking system service - calling a system functio ...
Hold and wait
... The dispatcher is the module that gives control of the CPU to the process selected by the short-term scheduler. This function involves the following switching context, switching to user mode and jumping to the proper location in the user program to restart that program. ...
... The dispatcher is the module that gives control of the CPU to the process selected by the short-term scheduler. This function involves the following switching context, switching to user mode and jumping to the proper location in the user program to restart that program. ...
Lecture 3
... Layered structure, but one layer consists of Mach microkernel, which provides: memory management, support for remote procedure calls (RPCs), interprocess communications (IPC) including message passing and thread ...
... Layered structure, but one layer consists of Mach microkernel, which provides: memory management, support for remote procedure calls (RPCs), interprocess communications (IPC) including message passing and thread ...
Operating-System Structures Chapter 2
... Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
... Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
What is an Operating System?
... Symmetric multiprocessing (SMP) Each processor runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP Asymmetric multiprocessing Each processor is assigned a specific task; master process ...
... Symmetric multiprocessing (SMP) Each processor runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP Asymmetric multiprocessing Each processor is assigned a specific task; master process ...