Distributed File Systems
... AFS command suite guarantees that all read-only volumes contain exact copies of the original read-write volume at the time the read-only copy was created ...
... AFS command suite guarantees that all read-only volumes contain exact copies of the original read-write volume at the time the read-only copy was created ...
Processes
... sometimes known as the text section. It also includes the current activity, as represented by the value of the program counter and the contents of the processor's registers. A process generally also includes the process ...
... sometimes known as the text section. It also includes the current activity, as represented by the value of the program counter and the contents of the processor's registers. A process generally also includes the process ...
Module 3: Operating
... that do not share memory or a clock. Each processor has its own local memory. Connected by a network. The processors in the system are connected through a communication network. Communication takes place using a protocol. A distributed system provides user access to various system ...
... that do not share memory or a clock. Each processor has its own local memory. Connected by a network. The processors in the system are connected through a communication network. Communication takes place using a protocol. A distributed system provides user access to various system ...
02_08_05_scheduling
... • The ready queue is treated as a circular queue, and the CPU scheduler rotates among the processes in the ready queue, giving each a time slice, after which it is preempted by a timer interrupt and another process is started – useful for time sharing multitasking systems - most widely used scheduli ...
... • The ready queue is treated as a circular queue, and the CPU scheduler rotates among the processes in the ready queue, giving each a time slice, after which it is preempted by a timer interrupt and another process is started – useful for time sharing multitasking systems - most widely used scheduli ...
The Macintosh File System (continued)
... – joins the two forks into one, and safely stores the type and creator codes and finder flags ...
... – joins the two forks into one, and safely stores the type and creator codes and finder flags ...
Chapter 13: I/O Systems Silberschatz, Galvin and Gagne ©2013! Edition!
... Application I/O Interface ■ I/O system calls encapsulate device behaviors in generic classes" ■ Device-driver layer hides differences among I/O controllers from kernel" ...
... Application I/O Interface ■ I/O system calls encapsulate device behaviors in generic classes" ■ Device-driver layer hides differences among I/O controllers from kernel" ...
A Survey of Embedded Operating System
... wait object allow a thread to block its own execution until the specified object changes. Windows CE queues mutex, critical section and event requests in "FIFO-by-priority" order: a different FIFO queue is defined for each of the 8 priority levels. Real-time application use interrupts as a way of e ...
... wait object allow a thread to block its own execution until the specified object changes. Windows CE queues mutex, critical section and event requests in "FIFO-by-priority" order: a different FIFO queue is defined for each of the 8 priority levels. Real-time application use interrupts as a way of e ...
OPERATING SYSTEMS STRUCTURES
... Generic device driver code Drivers for each device - translate read/write requests into disk position commands. ...
... Generic device driver code Drivers for each device - translate read/write requests into disk position commands. ...
Introduction CS 239 Security for Networks and System
... allow sendmail_t etc_aliases_t:file { read write }; allow sendmail_t etc_mail_t:dir { read search add_name remove_name }; allow sendmail_t etc_mail_t:file { create read write unlink }; ...
... allow sendmail_t etc_aliases_t:file { read write }; allow sendmail_t etc_mail_t:dir { read search add_name remove_name }; allow sendmail_t etc_mail_t:file { create read write unlink }; ...
Figure 5.01 - Operating System
... Shares with other threads belonging to the same process its code and data sections, and other OS resources (ex: open files and ...
... Shares with other threads belonging to the same process its code and data sections, and other OS resources (ex: open files and ...
CENG334 Introduction to Operating Systems
... From the user point of view, file is the only unit through which data can be written onto storage devices. The information in a file as well as the attributes of the file is determined by its creator. ...
... From the user point of view, file is the only unit through which data can be written onto storage devices. The information in a file as well as the attributes of the file is determined by its creator. ...
Process Description and Control
... channels of the computer system At any given time, an I/O device may be available or assigned to a particular process ...
... channels of the computer system At any given time, an I/O device may be available or assigned to a particular process ...
process
... Relationships between processes • A process has several stages of “living”: it is born (fork), it is developing (gets into process table) and is active (it is running). • All the processes have a family of a tree shape. A child process has a parent and a parent process may have several children. • ...
... Relationships between processes • A process has several stages of “living”: it is born (fork), it is developing (gets into process table) and is active (it is running). • All the processes have a family of a tree shape. A child process has a parent and a parent process may have several children. • ...
ppt
... IPC performance is the Master. All design decisions require a performance discussion. If something performs poorly, look for new techniques. Synergetic effects have to be taken into considerations. The design has to cover all levels from architecture down to coding. The design has to be made on a co ...
... IPC performance is the Master. All design decisions require a performance discussion. If something performs poorly, look for new techniques. Synergetic effects have to be taken into considerations. The design has to cover all levels from architecture down to coding. The design has to be made on a co ...
CENG334 Introduction to Operating Systems
... To initiate a DMA transfer, the host writes a DMA command block into memory. a pointer to the source of a transfer, a pointer to the destination of the transfer, and a count of the number of bytes to be transferred. The CPU writes the address of this command block to the DMA controller, then g ...
... To initiate a DMA transfer, the host writes a DMA command block into memory. a pointer to the source of a transfer, a pointer to the destination of the transfer, and a count of the number of bytes to be transferred. The CPU writes the address of this command block to the DMA controller, then g ...
L11-thread-impl
... – Can use signals to simulate interrupts, e.g., alarm – But then user code can’t use alarm directly ...
... – Can use signals to simulate interrupts, e.g., alarm – But then user code can’t use alarm directly ...
Chapter 2: Processes - Exercises
... When a number of kernel threads is less than the number of processors, then some of the processors would remain idle since the scheduler maps only kernel threads to processors and not user-level threads to processors. When the number of kernel threads is exactly equal to the number of processors, th ...
... When a number of kernel threads is less than the number of processors, then some of the processors would remain idle since the scheduler maps only kernel threads to processors and not user-level threads to processors. When the number of kernel threads is exactly equal to the number of processors, th ...
Unix processes and threads
... Fundamental to almost all operating systems = program in execution address space, usually separate program counter, stack pointer, hardware registers simple computer: one program, never stops 23-May-17 ...
... Fundamental to almost all operating systems = program in execution address space, usually separate program counter, stack pointer, hardware registers simple computer: one program, never stops 23-May-17 ...
Operating Systems
... Each device controller is in charge of a particular device type. Each device controller has a local buffer. CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controller. Device controller informs CPU that it has finished its operation by ...
... Each device controller is in charge of a particular device type. Each device controller has a local buffer. CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controller. Device controller informs CPU that it has finished its operation by ...
Slides
... UNIX – limited by hardware functionality, the original UNIX operating system had limited structuring. The UNIX OS consists of two separable parts Systems programs The kernel Consists of everything below the system-call interface and above the physical hardware Provides the file system, CPU sched ...
... UNIX – limited by hardware functionality, the original UNIX operating system had limited structuring. The UNIX OS consists of two separable parts Systems programs The kernel Consists of everything below the system-call interface and above the physical hardware Provides the file system, CPU sched ...
Operating system components Operating system
... they are often combined with other software programs in useful ways (often unseen by original author) any advance in computer speed will have a noticeable effect on a small program ...
... they are often combined with other software programs in useful ways (often unseen by original author) any advance in computer speed will have a noticeable effect on a small program ...
