operating system
... • The operating system is responsible for the following activities in connections with memory management: – Keep track of which parts of memory are currently being used and by whom. – Decide which processes to load when memory space becomes available. – Allocate and de-allocate memory space as neede ...
... • The operating system is responsible for the following activities in connections with memory management: – Keep track of which parts of memory are currently being used and by whom. – Decide which processes to load when memory space becomes available. – Allocate and de-allocate memory space as neede ...
Lecture Notes - UCLA Computer Science
... jobs so frequently that users can interact with each job while it is running, creating interactive computing z ...
... jobs so frequently that users can interact with each job while it is running, creating interactive computing z ...
basic-os-concepts
... A process can get “switched in” or “switched out”. OS should give the illusion for the process as if it exists in the CPU continuously => Context Switching ...
... A process can get “switched in” or “switched out”. OS should give the illusion for the process as if it exists in the CPU continuously => Context Switching ...
1. Process Concept
... Static Data Section: e.g., global variables and arrays Dynamic Data Section: e.g., malloc() or calloc() calls Stack Section: e.g., local variables, function/procedure parameters, and return address PC (Program Counter): next instruction Note that a single text program on HDD can be loaded into sever ...
... Static Data Section: e.g., global variables and arrays Dynamic Data Section: e.g., malloc() or calloc() calls Stack Section: e.g., local variables, function/procedure parameters, and return address PC (Program Counter): next instruction Note that a single text program on HDD can be loaded into sever ...
virtual machine
... • Start by defining goals and specifications • Affected by choice of hardware, type of system • User goals and System goals – User goals – operating system should be convenient to use, easy to learn, reliable, safe, and fast – System goals – operating system should be easy to design, implement, and ...
... • Start by defining goals and specifications • Affected by choice of hardware, type of system • User goals and System goals – User goals – operating system should be convenient to use, easy to learn, reliable, safe, and fast – System goals – operating system should be easy to design, implement, and ...
Introduction to Object Technology
... • Created to provide a service such as printing • Process creates another process ...
... • Created to provide a service such as printing • Process creates another process ...
CHAP4
... • Operating system supports multiple threads of execution within a single process • MS-DOS supports a single thread • UNIX supports multiple user processes but only supports one thread per process • Windows 2000, Solaris, Linux, Mach, and OS/2 support multiple threads ...
... • Operating system supports multiple threads of execution within a single process • MS-DOS supports a single thread • UNIX supports multiple user processes but only supports one thread per process • Windows 2000, Solaris, Linux, Mach, and OS/2 support multiple threads ...
EECE 432– Operating Systems
... Students will work in teams to finish three projects. The first and second project will consist on modifying the kernel of an operating system to customize a specific behavior. The third project is to examine a case study or build a module from scratch where students get exposed and focus on one sp ...
... Students will work in teams to finish three projects. The first and second project will consist on modifying the kernel of an operating system to customize a specific behavior. The third project is to examine a case study or build a module from scratch where students get exposed and focus on one sp ...
Fundamentals of Operating Systems - DBBM
... • It handles input and output to and from attached hardware devices, such as hard disks, printers, and dialup ports. • It sends messages to each application or interactive user (or to a system operator) about the status of operation and any errors that may have occurred. • It can offload the managem ...
... • It handles input and output to and from attached hardware devices, such as hard disks, printers, and dialup ports. • It sends messages to each application or interactive user (or to a system operator) about the status of operation and any errors that may have occurred. • It can offload the managem ...
User view
... Operating system is an important part of every computer system. A computer system can be divided into four components; Hardware OS Application programs Users Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware a ...
... Operating system is an important part of every computer system. A computer system can be divided into four components; Hardware OS Application programs Users Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware a ...
Chapter 3: Operating
... next command statement. With a user-friendly shell making the system more agreeable to some users ...
... next command statement. With a user-friendly shell making the system more agreeable to some users ...
Slide
... – Output data from child to parent (via wait) – Process’ resources are deallocated by operating system ...
... – Output data from child to parent (via wait) – Process’ resources are deallocated by operating system ...
COS 318: Operating Systems OS Structures and System Calls Kai Li
... Application use these calls to manage memory at fine granularity When reaching the end, library asks the kernel for more ...
... Application use these calls to manage memory at fine granularity When reaching the end, library asks the kernel for more ...
Process Execution time deadline
... low latency with loss of CPU/cache state low latency with loss of all state except memory lowest-power state with all devices off ...
... low latency with loss of CPU/cache state low latency with loss of all state except memory lowest-power state with all devices off ...
Principles of Operating System
... – contains all of the information about a process that is needed by the OS – blocks are read and/or modified by virtually every module in the OS – defines the state of the OS Difficulty is not access, but protection – a bug in a single routine could damage process control blocks, which could destroy ...
... – contains all of the information about a process that is needed by the OS – blocks are read and/or modified by virtually every module in the OS – defines the state of the OS Difficulty is not access, but protection – a bug in a single routine could damage process control blocks, which could destroy ...
ICOM 4015 - Advanced Programming
... The shell is not the kernel The shell is an ordinary user program It operates by creating processes that in turn do system calls or run programs It is the equivalent of COMMAND.COM in MS/DOS Shell programming is possible and is often done in OS utilities Extensions of shell programming include: ...
... The shell is not the kernel The shell is an ordinary user program It operates by creating processes that in turn do system calls or run programs It is the equivalent of COMMAND.COM in MS/DOS Shell programming is possible and is often done in OS utilities Extensions of shell programming include: ...
3.2. The Process
... terminate. However, the shell can be told not to wait for the child to terminate. • It may not wait for the child to terminate and may continue to spawn other processes. init process is an example of such a parent process. ps: Process Status Because processes are so important to getting things done, ...
... terminate. However, the shell can be told not to wait for the child to terminate. • It may not wait for the child to terminate and may continue to spawn other processes. init process is an example of such a parent process. ps: Process Status Because processes are so important to getting things done, ...
PPT - Defcon
... • Although scheduling code to run is based upon threads, when the kernel reports what is running on the system, it reports based upon EPROCESS blocks which can be modified with no adverse affect. This is what current tools (IDS/IPS’s) rely upon to discover what is running on the system. ...
... • Although scheduling code to run is based upon threads, when the kernel reports what is running on the system, it reports based upon EPROCESS blocks which can be modified with no adverse affect. This is what current tools (IDS/IPS’s) rely upon to discover what is running on the system. ...
The LINUX Operating System
... mechanisms of signals, pipes and semaphores, shared memory... • Relationships parent / child process • Most process has virtual memory ...
... mechanisms of signals, pipes and semaphores, shared memory... • Relationships parent / child process • Most process has virtual memory ...
Lecture 2 Processes and Threads
... activity at a time (load a remote file while editing a program, for example), and uniprogramming does not allow this. So DOS and other uniprogrammed systems put in things like memory-resident programs that invoked asynchronously, but still have separation problems. One key problem with DOS is th ...
... activity at a time (load a remote file while editing a program, for example), and uniprogramming does not allow this. So DOS and other uniprogrammed systems put in things like memory-resident programs that invoked asynchronously, but still have separation problems. One key problem with DOS is th ...
Kernel Control Path
... Because of its simplicity, interrupt disabling is used by kernel functions for implementing a critical region. This technique does not always prevent kernel control path interleaving. Critical section should be short because any communication between CPU and I/O is blocked while a kernel control pat ...
... Because of its simplicity, interrupt disabling is used by kernel functions for implementing a critical region. This technique does not always prevent kernel control path interleaving. Critical section should be short because any communication between CPU and I/O is blocked while a kernel control pat ...
Powerpoint format - Computer and Information Sciences
... • Created to provide a service such as printing • Process creates another process ...
... • Created to provide a service such as printing • Process creates another process ...