EN 1975155
... Nowadays real-time applications are created as a set of cooperative and independent tasks. VxWorks enables message queue as a higher-level synchronization mechanism which allows cooperating tasks to communicate with each other this also includes high-speed semaphores. Due to the complexities in this ...
... Nowadays real-time applications are created as a set of cooperative and independent tasks. VxWorks enables message queue as a higher-level synchronization mechanism which allows cooperating tasks to communicate with each other this also includes high-speed semaphores. Due to the complexities in this ...
ch1
... the program most intimately involved with the hardware. There are two different views: The operating system is a resource allocator ...
... the program most intimately involved with the hardware. There are two different views: The operating system is a resource allocator ...
VIII. Input/Output I/O Hardware
... Host-attached storage accessed through I/O ports talking to I/O busses ...
... Host-attached storage accessed through I/O ports talking to I/O busses ...
VIII. Input/Output
... Performance depends on the number and types of requests. Requests for disk service can be influenced by the file-allocation method. The disk-scheduling algorithm should be written as a separate module of ...
... Performance depends on the number and types of requests. Requests for disk service can be influenced by the file-allocation method. The disk-scheduling algorithm should be written as a separate module of ...
Computer-System Operation
... service routine generally, through the interrupt vector, which contains the addresses of all the service routines. Interrupt architecture must save the address of the interrupted instruction. Incoming interrupts are disabled while another interrupt is being processed. A trap is a software-generated ...
... service routine generally, through the interrupt vector, which contains the addresses of all the service routines. Interrupt architecture must save the address of the interrupted instruction. Incoming interrupts are disabled while another interrupt is being processed. A trap is a software-generated ...
Slides
... But if we want to start several processes, then the running program in CPU (current process) has to be stopped for a while and other program (process) has to run in CPU. – Process management becomes an important issue – To do process switch, we have to save the state/context (register values) of the ...
... But if we want to start several processes, then the running program in CPU (current process) has to be stopped for a while and other program (process) has to run in CPU. – Process management becomes an important issue – To do process switch, we have to save the state/context (register values) of the ...
Wikibook
... Through the 1950s, many major features were pioneered in the field of operating systems, including batch processing, input/output interrupt, buffering, multitasking, spooling, runtime libraries, link-loading, and programs for sorting records in files. These features were included or not included in ...
... Through the 1950s, many major features were pioneered in the field of operating systems, including batch processing, input/output interrupt, buffering, multitasking, spooling, runtime libraries, link-loading, and programs for sorting records in files. These features were included or not included in ...
Abstract View of System Components
... We want to have an efficient O/S because it consumes more resources than any other program. is the most complex program. is necessary for any use of the computer. is used by many users. Efficiency is measured through Functionality Performance: Time and Utilization Convenience and C ...
... We want to have an efficient O/S because it consumes more resources than any other program. is the most complex program. is necessary for any use of the computer. is used by many users. Efficiency is measured through Functionality Performance: Time and Utilization Convenience and C ...
ch12
... Kernel keeps state info for I/O components, including open file tables, network connections, character device state ...
... Kernel keeps state info for I/O components, including open file tables, network connections, character device state ...
vMatrix: In this thesis - The vMatrix
... BEA WebLogic [16][51][21], but, within those frameworks, library versions and operating system release mismatches can lead to inter-operability problems that hinder such mobility. In addition, it is not common for large-scale Internet services to use such application server frameworks in the first p ...
... BEA WebLogic [16][51][21], but, within those frameworks, library versions and operating system release mismatches can lead to inter-operability problems that hinder such mobility. In addition, it is not common for large-scale Internet services to use such application server frameworks in the first p ...
Processes
... – Processes can communicate only if they share a mailbox • Properties of communication link – Link established only if processes share a common mailbox – A link may be associated with many processes – Each pair of processes may share several communication links – Link may be unidirectional or bi-dir ...
... – Processes can communicate only if they share a mailbox • Properties of communication link – Link established only if processes share a common mailbox – A link may be associated with many processes – Each pair of processes may share several communication links – Link may be unidirectional or bi-dir ...
General-purpose Process Migration
... behavior. Given such capabilities, application functionality can be extended using novel abstractions such as “active versioning”. For example, while a user is working on developing complex macros for a spreadsheet, he might decide to do some risky experimentation without necessarily saving the curr ...
... behavior. Given such capabilities, application functionality can be extended using novel abstractions such as “active versioning”. For example, while a user is working on developing complex macros for a spreadsheet, he might decide to do some risky experimentation without necessarily saving the curr ...
files
... Used to load device drivers and to configure, disable, or enable OS features, such as number of files that can be opened. Used in new operating systems to support legacy software applications. ...
... Used to load device drivers and to configure, disable, or enable OS features, such as number of files that can be opened. Used in new operating systems to support legacy software applications. ...
Desktop Linux ready for prime time and on a screen near you
... for as little as $40. Linux can run on PC-based hardware. This means it´s easy to add disk space or memory. AND, some services will run very well on a P1 with 64MB RAM, which you probably have collecting dust at your office. Speed . Many studies have proven that on equal hardware, Linux is several t ...
... for as little as $40. Linux can run on PC-based hardware. This means it´s easy to add disk space or memory. AND, some services will run very well on a P1 with 64MB RAM, which you probably have collecting dust at your office. Speed . Many studies have proven that on equal hardware, Linux is several t ...
03_processes
... But if we want to start several processes, then the running program in CPU (current process) has to be stopped for a while and other program (process) has to run in CPU. – Process management becomes an important issue – To do process switch, we have to save the state/context (register values) of the ...
... But if we want to start several processes, then the running program in CPU (current process) has to be stopped for a while and other program (process) has to run in CPU. – Process management becomes an important issue – To do process switch, we have to save the state/context (register values) of the ...
CS 519 -- Operating Systems -
... The creating process is called the parent and the new process is called the child The child process is created as a copy of the parent process (process image and process control structure) except for the identification and scheduling state Parent and child processes run in two different addres ...
... The creating process is called the parent and the new process is called the child The child process is created as a copy of the parent process (process image and process control structure) except for the identification and scheduling state Parent and child processes run in two different addres ...
Processes and threads
... networks, other processes), access to devices. ... in execution. It needs the processor to run. But it doesn't run all the time. So it needs information about what it is up to stored somewhere. Operating Systems ...
... networks, other processes), access to devices. ... in execution. It needs the processor to run. But it doesn't run all the time. So it needs information about what it is up to stored somewhere. Operating Systems ...
Operating Systems, 6th ed. Test Bank Chapter 4 Page 1 of 15
... 32. T / F – All deadlocks involve conflicting needs for resources by two or more processes. 33. T / F – A reusable resource is one that can be safely used by only one process at a time and is not depleted by that use. 34. T / F – A consumable resource is one that can be safely used by only one proce ...
... 32. T / F – All deadlocks involve conflicting needs for resources by two or more processes. 33. T / F – A reusable resource is one that can be safely used by only one process at a time and is not depleted by that use. 34. T / F – A consumable resource is one that can be safely used by only one proce ...
lecture1423726024
... 4. Distributed System/Loosely Coupled Systems: In contrast to tightly coupled systems, the processors do not share memory or a clock. Instead, each processor has its own local memory. The processors communicate with each other by various communication lines such as high speed buses or telephone line ...
... 4. Distributed System/Loosely Coupled Systems: In contrast to tightly coupled systems, the processors do not share memory or a clock. Instead, each processor has its own local memory. The processors communicate with each other by various communication lines such as high speed buses or telephone line ...
Introduction to Unix
... resources (e.g. the CPU, memory, disks, modems, printers network cards etc.) in a safe, efficient and abstract way. For example, an OS ensures safe access to a printer by allowing only one application program to send data directly to the printer at any one time. An OS encourages efficient use of the ...
... resources (e.g. the CPU, memory, disks, modems, printers network cards etc.) in a safe, efficient and abstract way. For example, an OS ensures safe access to a printer by allowing only one application program to send data directly to the printer at any one time. An OS encourages efficient use of the ...
Guide-to-UNIX-Using-Linux-4th-Edition-Michael-Palmer-Test-Bank
... At the bottom of the pyramid is the hardware. At the top are the users. The layers between them provide insulation, ensuring system security and user privacy. The kernel is the base operating system, and it interacts directly with the hardware, software services, application programs, and user-creat ...
... At the bottom of the pyramid is the hardware. At the top are the users. The layers between them provide insulation, ensuring system security and user privacy. The kernel is the base operating system, and it interacts directly with the hardware, software services, application programs, and user-creat ...
message
... Unbounded-buffer places no practical limit on the size of the buffer. Consumer may wait, producer never waits. Bounded-buffer assumes that there is a fixed buffer size. Consumer waits for new item, producer waits if buffer is full. ...
... Unbounded-buffer places no practical limit on the size of the buffer. Consumer may wait, producer never waits. Bounded-buffer assumes that there is a fixed buffer size. Consumer waits for new item, producer waits if buffer is full. ...
operating system
... recording all such connections for detection of break-ins. If a system is to be protected and secure, precautions must be instituted through out it. A chain is only as strong as its weakest link. SYSTEM CALLS: System calls provide an interface to the services made available by an operating system. T ...
... recording all such connections for detection of break-ins. If a system is to be protected and secure, precautions must be instituted through out it. A chain is only as strong as its weakest link. SYSTEM CALLS: System calls provide an interface to the services made available by an operating system. T ...