Slide 1
... Automated System Recovery (ASR) Dynamic disk support Fax service Internet Information Services (IIS)/Personal Web server Encrypting File System (EFS) continued ...
... Automated System Recovery (ASR) Dynamic disk support Fax service Internet Information Services (IIS)/Personal Web server Encrypting File System (EFS) continued ...
Linux Operations and Administration
... • Summarize the functions of an operating system • Identify key historical points in the development of Linux • Explain the components of the Linux architecture and features of the operating system ...
... • Summarize the functions of an operating system • Identify key historical points in the development of Linux • Explain the components of the Linux architecture and features of the operating system ...
Document
... • Service configuration utility – Main window lists services available on system • Determined by contents of /etc/rc.d/init.d ...
... • Service configuration utility – Main window lists services available on system • Determined by contents of /etc/rc.d/init.d ...
Lecture 5: September 19 5.1 Scheduling
... Shortest Job First (SJF) is a scheduling policy that selects the waiting process with the smallest (expected) amount of work (CPU time) to execute next. Once a job is selected it is run non-preemptively. Shortest job first is advantageous because it provably minimizes the average wait time. However, ...
... Shortest Job First (SJF) is a scheduling policy that selects the waiting process with the smallest (expected) amount of work (CPU time) to execute next. Once a job is selected it is run non-preemptively. Shortest job first is advantageous because it provably minimizes the average wait time. However, ...
Threads - ukiacrew it
... Thread library creates another user thread to do system call (5) (c) Sistem call 1 is unblocked (1), preempt the current kernel thread (2), do upcall to thread library (3) Preempt the new user thread(4) Resume the last blocked user thread. Operating System Concepts ...
... Thread library creates another user thread to do system call (5) (c) Sistem call 1 is unblocked (1), preempt the current kernel thread (2), do upcall to thread library (3) Preempt the new user thread(4) Resume the last blocked user thread. Operating System Concepts ...
schduling - The Toppers Way
... FCFS favor long processes as compared to short ones. (Convoy effect) Average waiting time is often quite long FCFS is non-preemptive, so it is trouble some for time sharing systems ...
... FCFS favor long processes as compared to short ones. (Convoy effect) Average waiting time is often quite long FCFS is non-preemptive, so it is trouble some for time sharing systems ...
Thread
... are called local data. Local (static) data associated with a thread are allocated on the stack. So these may be deallocated when a thread returns. So don’t plan on using locally declared variables for returning arguments. Plan to pass the arguments thru argument list passed from the caller or in ...
... are called local data. Local (static) data associated with a thread are allocated on the stack. So these may be deallocated when a thread returns. So don’t plan on using locally declared variables for returning arguments. Plan to pass the arguments thru argument list passed from the caller or in ...
Advanced Operating Systems
... “Modern Operating Systems” , Andrew Tanenbaum. Coulouris, et al., “Distributed Systems: Concepts and ...
... “Modern Operating Systems” , Andrew Tanenbaum. Coulouris, et al., “Distributed Systems: Concepts and ...
Threads (and more on Processes)
... Semantics of fork() and exec() • Does fork() duplicate only the calling thread or all threads? – Easy if user-level threads – Not so easy with kernel-level threads • Linux has special clone() operation • Windows XP has something similar ...
... Semantics of fork() and exec() • Does fork() duplicate only the calling thread or all threads? – Easy if user-level threads – Not so easy with kernel-level threads • Linux has special clone() operation • Windows XP has something similar ...
CPU Scheduling
... amount of time that a job can keep control of the CPU, in practice, the jobs are released earlier. Why? The book talked about the multiple queueing system used by CTSS. If a process needed 30 quanta to complete, how many times would it be swapped in to complete? How does Lottery Scheduling work? Wha ...
... amount of time that a job can keep control of the CPU, in practice, the jobs are released earlier. Why? The book talked about the multiple queueing system used by CTSS. If a process needed 30 quanta to complete, how many times would it be swapped in to complete? How does Lottery Scheduling work? Wha ...
Solution Operating System Concepts By Galvin,Silberschatz Solved
... When the kernel is switching between two different address spaces it must store the registers as well as the address space. Saving the address space involves saving pointers to the page tables, segment tables, and whatever other data structures are used by the CPU to describe an address space. When ...
... When the kernel is switching between two different address spaces it must store the registers as well as the address space. Saving the address space involves saving pointers to the page tables, segment tables, and whatever other data structures are used by the CPU to describe an address space. When ...
ch13
... Scatter/Gather I/O Suppose we’re reading a single packet or disk block into two or more non-contiguous pages The I/O transfer has to use more than one (address, length) pair for that transfer to scatter the data around memory The same applies on output, where it has to be gathered from differe ...
... Scatter/Gather I/O Suppose we’re reading a single packet or disk block into two or more non-contiguous pages The I/O transfer has to use more than one (address, length) pair for that transfer to scatter the data around memory The same applies on output, where it has to be gathered from differe ...
ppt
... execution, which forms the basis of all computation To describe the various features of processes, including ...
... execution, which forms the basis of all computation To describe the various features of processes, including ...
Chapter 3 Slides
... pid t pid; /* process identifier */ long state; /* state of the process */ unsigned int time slice /* scheduling information */ struct task struct *parent; /* this process’s parent */ struct list head children; /* this process’s children */ struct files struct *files; /* list of open files */ struct ...
... pid t pid; /* process identifier */ long state; /* state of the process */ unsigned int time slice /* scheduling information */ struct task struct *parent; /* this process’s parent */ struct list head children; /* this process’s children */ struct files struct *files; /* list of open files */ struct ...
Software I: Utilities and Internals
... (operating system core, which allocates and control resources such as CPU time, memory and I/O devices). • UNIX includes: – kernel – tools, including compilers, editors, etc. – shell, which includes its own programming language ...
... (operating system core, which allocates and control resources such as CPU time, memory and I/O devices). • UNIX includes: – kernel – tools, including compilers, editors, etc. – shell, which includes its own programming language ...
CPU scheduler
... Some operating systems, such as time-sharing systems, may introduce an additional, intermediate level of scheduling. This medium-term scheduler, removes processes from memory (and from active contention for the CPU), and thus reduces the degree of ...
... Some operating systems, such as time-sharing systems, may introduce an additional, intermediate level of scheduling. This medium-term scheduler, removes processes from memory (and from active contention for the CPU), and thus reduces the degree of ...
P - GCG-42
... – new: The process is being created. – running: Instructions are being executed. – waiting: The process is waiting for some event to ...
... – new: The process is being created. – running: Instructions are being executed. – waiting: The process is waiting for some event to ...
Document
... chopsticks are available (pick up in a critical section) Use an asymmetric solution: an odd philosopher pick up first her left chopstick and then her right chopstick; whereas an even philosopher pick up first her right chopstick and then her left chopstick ...
... chopsticks are available (pick up in a critical section) Use an asymmetric solution: an odd philosopher pick up first her left chopstick and then her right chopstick; whereas an even philosopher pick up first her right chopstick and then her left chopstick ...
process threads
... process. Threads library maps user threads into LWPs. Several LWPs may be created within a process. – Kernel threads: A kernel thread is associated with each LWP. The kernel also creates some kernel threads for its own use, e.g., a thread to handle disk I/O. ...
... process. Threads library maps user threads into LWPs. Several LWPs may be created within a process. – Kernel threads: A kernel thread is associated with each LWP. The kernel also creates some kernel threads for its own use, e.g., a thread to handle disk I/O. ...
Lecture 1: Overview
... Protected access to processors, other processes (IPC), files, and I/O resources (devices & channels) ...
... Protected access to processors, other processes (IPC), files, and I/O resources (devices & channels) ...
Module 4: Processes
... struct task_struct *parent; /* this process’s parent */ struct list_head children; /* this process’s children */ struct files_struct *files; /* list of open files */ struct mm_struct *mm; /* address space of this process */ ...
... struct task_struct *parent; /* this process’s parent */ struct list_head children; /* this process’s children */ struct files_struct *files; /* list of open files */ struct mm_struct *mm; /* address space of this process */ ...
University of Tehran
... Exokernel records the allocator and the permissions and returns a “capability” – an encrypted cypher Every access to this page by the library requires this capability ...
... Exokernel records the allocator and the permissions and returns a “capability” – an encrypted cypher Every access to this page by the library requires this capability ...
Memory Safety for Low-Level Software/Hardware Interactions
... gram operations. In a kernel, however, a buggy kernel operation might overwrite program state while it is offprocessor and that state might later be swapped in between the definition and the use of the pointer value, a buggy MMU mapping might remap the underlying physical memory to a different virt ...
... gram operations. In a kernel, however, a buggy kernel operation might overwrite program state while it is offprocessor and that state might later be swapped in between the definition and the use of the pointer value, a buggy MMU mapping might remap the underlying physical memory to a different virt ...