Investigation of Real-Time Operating Systems : OSEK/VDX and Rubus
... 1.1 Motivation for this work Since it becomes more and more common in the car industry with networks of different control units made by different distributors in the cars, standards for interfaces and protocols become more and more important. One industry standard, which grows mostly in the European ...
... 1.1 Motivation for this work Since it becomes more and more common in the car industry with networks of different control units made by different distributors in the cars, standards for interfaces and protocols become more and more important. One industry standard, which grows mostly in the European ...
CPU Scheduling
... the processing of a system call, the kernel may be busy with an activity on behalf of a process. Such activities may involve changing important kernel data (for instance, I/O queues). What happens if the process is preempted in the middle of these changes and the kernel (or the device driver) needs ...
... the processing of a system call, the kernel may be busy with an activity on behalf of a process. Such activities may involve changing important kernel data (for instance, I/O queues). What happens if the process is preempted in the middle of these changes and the kernel (or the device driver) needs ...
slides18-stm
... is in the IO monad is baked in to the language. There is no need to mark anything in the type system because IO is everywhere. In Haskell, the programmer can choose when to live in the IO monad and when to live in the realm of pure functional programming. Interesting perspective: It is not Haske ...
... is in the IO monad is baked in to the language. There is no need to mark anything in the type system because IO is everywhere. In Haskell, the programmer can choose when to live in the IO monad and when to live in the realm of pure functional programming. Interesting perspective: It is not Haske ...
David Walker
... There is a lot of research going on in the compiler and architecture communities to optimize STM. This work typically assumes transactions are smallish and have low contention. If these assumptions are wrong, performance can degrade drastically. We need more experience with “real” workloads an ...
... There is a lot of research going on in the compiler and architecture communities to optimize STM. This work typically assumes transactions are smallish and have low contention. If these assumptions are wrong, performance can degrade drastically. We need more experience with “real” workloads an ...
The Architecture of a Worldwide Distributed System
... period of learning as much as you can in as many different subjects that are interesting. In this respect I took full advantage of my Ph.D.: I did work ranging from programming my own EEPROMs, to secure network objects, digital video on demand, and a full blown new operating system with its own TCP/ ...
... period of learning as much as you can in as many different subjects that are interesting. In this respect I took full advantage of my Ph.D.: I did work ranging from programming my own EEPROMs, to secure network objects, digital video on demand, and a full blown new operating system with its own TCP/ ...
Electrical Engineering and Computer Science Department Technical
... sophisticated languages and compilers they support do not line up with the services provided by general-purpose OSes. Furthermore, the semantics available to the runtime are lost at the system-call boundary in such OSes. Finally, because a runtime executes at user-level in such an environment, it ca ...
... sophisticated languages and compilers they support do not line up with the services provided by general-purpose OSes. Furthermore, the semantics available to the runtime are lost at the system-call boundary in such OSes. Finally, because a runtime executes at user-level in such an environment, it ca ...
On the construction of operating systems for the - UvA-DARE
... my initial exploration phase where I got myself acquainted with the architecture, I discovered it had no approach for dealing with interrupts, exceptions or faults, a mechanism heavily relied on by operating systems. I completed the graduation project for my Doctoraal (MSc) with a proposed designs t ...
... my initial exploration phase where I got myself acquainted with the architecture, I discovered it had no approach for dealing with interrupts, exceptions or faults, a mechanism heavily relied on by operating systems. I completed the graduation project for my Doctoraal (MSc) with a proposed designs t ...
OperatingSystems_FA15_5_Scheduling
... Process Shared Data: Using semaphores, mutexes, and spinlocks. Kernel critical data guarded from simultaneous use. Process updating critical data is interrupted and second process reads the critical data, which the interrupted process has not completed updating. Interrupt Handlers disable/enable i ...
... Process Shared Data: Using semaphores, mutexes, and spinlocks. Kernel critical data guarded from simultaneous use. Process updating critical data is interrupted and second process reads the critical data, which the interrupted process has not completed updating. Interrupt Handlers disable/enable i ...
Operating Systems
... (software) timer is an object used to keep track of time. In addition to systemwide timers, most operating systems allow threads (or processes) to have their own timers. A per thread (or per process) timer is created by the kernel on behalf of a thread (or process) when the thread calls the create t ...
... (software) timer is an object used to keep track of time. In addition to systemwide timers, most operating systems allow threads (or processes) to have their own timers. A per thread (or per process) timer is created by the kernel on behalf of a thread (or process) when the thread calls the create t ...
Operating Systems Principles and Programming More Contact
... Access to a page outside the process space → issue a segmentation/page fault The kernel function itself is buggy and accesses and illegal address → call oops() (possibly leading to “kernel panic”) ...
... Access to a page outside the process space → issue a segmentation/page fault The kernel function itself is buggy and accesses and illegal address → call oops() (possibly leading to “kernel panic”) ...
Friendly Virtual Machines Leveraging a Feedback-Control Model for Application Adaptation
... particularly useful in predicting overload conditions unless the corresponding resources (CPU cycles, network bandwidth, and virtual memory, respectively) happen to represent the “bottleneck” of the system. More importantly, detecting overload using any one such metric will trigger an application to ...
... particularly useful in predicting overload conditions unless the corresponding resources (CPU cycles, network bandwidth, and virtual memory, respectively) happen to represent the “bottleneck” of the system. More importantly, detecting overload using any one such metric will trigger an application to ...
SGG - UTSA CS
... there exist some processes that wish to enter their critical section, then only the ones that are not busy in their reminder sections must compete and one should be able to enter its CS (the selection cannot be postponed indefinitely to wait a process executing in its remainder section). ...
... there exist some processes that wish to enter their critical section, then only the ones that are not busy in their reminder sections must compete and one should be able to enter its CS (the selection cannot be postponed indefinitely to wait a process executing in its remainder section). ...
PPT
... CPU, but the operating system is switching processes every 15 milliseconds (on average) so that at 1 minute, an operating system can swap 4000 processes! The replacement of a running process with a new process is ...
... CPU, but the operating system is switching processes every 15 milliseconds (on average) so that at 1 minute, an operating system can swap 4000 processes! The replacement of a running process with a new process is ...
1.01 - BRAUDE
... CPU, but the operating system is switching processes every 15 milliseconds (on average) so that at 1 minute, an operating system can swap 4000 processes! The replacement of a running process with a new process is ...
... CPU, but the operating system is switching processes every 15 milliseconds (on average) so that at 1 minute, an operating system can swap 4000 processes! The replacement of a running process with a new process is ...
MapReduce on Multi-core
... very large dataset in parallel on a cluster computing environment [8]. The simplicity of this programming model is that it allows the programmers to define the computational problem using functional style algorithm. The runtime system automatically parallelises this algorithm by distributing it on a ...
... very large dataset in parallel on a cluster computing environment [8]. The simplicity of this programming model is that it allows the programmers to define the computational problem using functional style algorithm. The runtime system automatically parallelises this algorithm by distributing it on a ...
What is a Concurrent Program?
... the difference between sequential and concurrent programs; to provide the student with a sound understanding of the concepts, models and practice involved in designing concurrent software; to provide the student with concurrent programming practice and experience through the use of Java. ...
... the difference between sequential and concurrent programs; to provide the student with a sound understanding of the concepts, models and practice involved in designing concurrent software; to provide the student with concurrent programming practice and experience through the use of Java. ...
The Application Kernel Approach - a Novel Approach for Adding
... one CPU core, either logically through Symmetric MultiThreading [11] or physically as a Chip MultiProcessor [18]. For instance, current Intel Pentium 4 and Xeon processors contain two logical processors [31] and several other manufacturers are in the process of introducing on-chip multiprocessors [2 ...
... one CPU core, either logically through Symmetric MultiThreading [11] or physically as a Chip MultiProcessor [18]. For instance, current Intel Pentium 4 and Xeon processors contain two logical processors [31] and several other manufacturers are in the process of introducing on-chip multiprocessors [2 ...
Comparison of Erlang Runtime System and Java Virtual Machine
... 2. Race conditions - occurs when the programmer hasn’t correctly guaranteed the order of execution between two threads. Which means that the correctness of the program depends on the OS scheduler, which is not deterministic, resulting in hard to reproduce errors. 3. Spending too much time in the cri ...
... 2. Race conditions - occurs when the programmer hasn’t correctly guaranteed the order of execution between two threads. Which means that the correctness of the program depends on the OS scheduler, which is not deterministic, resulting in hard to reproduce errors. 3. Spending too much time in the cri ...
CPU Scheduling
... Tanenbaum, Modern Operating Systems 3 e, (c) 2008 Prentice-Hall, Inc. All rights reserved. 0-13-6006639 ...
... Tanenbaum, Modern Operating Systems 3 e, (c) 2008 Prentice-Hall, Inc. All rights reserved. 0-13-6006639 ...
Lecture 12
... * Portable/multi-platform, including Unix and Windows NT platforms * Available in C/C++ and Fortran implementations * Can be very easy and simple to use - provides for "incremental parallelism" https://computing.llnl.gov/tutorials/parallel_comp/ ...
... * Portable/multi-platform, including Unix and Windows NT platforms * Available in C/C++ and Fortran implementations * Can be very easy and simple to use - provides for "incremental parallelism" https://computing.llnl.gov/tutorials/parallel_comp/ ...
MODERN OPERATING SYSTEMS Third Edition ANDREW S. …
... termination, with approximately the same options as well. Intro To OS, Chapter 2 By Rana Umer ...
... termination, with approximately the same options as well. Intro To OS, Chapter 2 By Rana Umer ...
Thread (computing)
In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system. The implementation of threads and processes differs between operating systems, but in most cases a thread is a component of a process. Multiple threads can exist within the same process, executing concurrently (one starting before others finish) and share resources such as memory, while different processes do not share these resources. In particular, the threads of a process share its instructions (executable code) and its context (the values of its variables at any given moment).On a single processor, multithreading is generally implemented by time slicing (as in multitasking), and the central processing unit (CPU) switches between different software threads. This context switching generally happens frequently enough that the user perceives the threads or tasks as running at the same time (in parallel). On a multiprocessor or multi-core system, multiple threads can be executed in parallel (at the same instant), with every processor or core executing a separate thread simultaneously; on a processor or core with hardware threads, separate software threads can also be executed concurrently by separate hardware threads.Threads made an early appearance in OS/360 Multiprogramming with a Variable Number of Tasks (MVT) in 1967, in which they were called ""tasks"". Process schedulers of many modern operating systems directly support both time-sliced and multiprocessor threading, and the operating system kernel allows programmers to manipulate threads by exposing required functionality through the system call interface. Some threading implementations are called kernel threads, whereas lightweight processes (LWP) are a specific type of kernel thread that share the same state and information. Furthermore, programs can have user-space threads when threading with timers, signals, or other methods to interrupt their own execution, performing a sort of ad hoc time-slicing.