Charles Haiber`s presentation on Exokernels
... abstractions, provided by kernels to enable as many types of applications to run on the system, tend to have a very high cost in system resources • Hurts the performance of applications • Hides information from applications • Limits the functionality of applications ...
... abstractions, provided by kernels to enable as many types of applications to run on the system, tend to have a very high cost in system resources • Hurts the performance of applications • Hides information from applications • Limits the functionality of applications ...
slides - Embedded System and Wireless Networking Lab National
... the number of general-purpose processors used. Single-processor systems: There is one main CPU capable of executing a general-purpose instruction set. Almost all systems have other special-purpose processors as well. Device-specific processors (e.g., graphics controllers). Do not run user ...
... the number of general-purpose processors used. Single-processor systems: There is one main CPU capable of executing a general-purpose instruction set. Almost all systems have other special-purpose processors as well. Device-specific processors (e.g., graphics controllers). Do not run user ...
Introduction
... on each terminal port whenever the system is allowing users to log in After getty displays the message login: and some types the usernames followed by RETURN, it starts up a program called login to finish the process of logging in. Then getty ...
... on each terminal port whenever the system is allowing users to log in After getty displays the message login: and some types the usernames followed by RETURN, it starts up a program called login to finish the process of logging in. Then getty ...
Course Introduction
... designed to address? • What are examples of computing systems that don’t need all of the components shown on slide 23? What are other common major elements that aren’t shown on this slide? • What is the major difference between a hard real-time system and a soft real-time system? What is an example ...
... designed to address? • What are examples of computing systems that don’t need all of the components shown on slide 23? What are other common major elements that aren’t shown on this slide? • What is the major difference between a hard real-time system and a soft real-time system? What is an example ...
Final Year Project Electronic & Computer Engineering
... Installed Linux on computer Installed Real-Time Application Interface Got the first 3 out of first 4 experiments loading and one of the more advanced experiments also Created a Live CD of Ubuntu that will boot and fully function but not running of my kernel with built in RTAI ...
... Installed Linux on computer Installed Real-Time Application Interface Got the first 3 out of first 4 experiments loading and one of the more advanced experiments also Created a Live CD of Ubuntu that will boot and fully function but not running of my kernel with built in RTAI ...
The Abstraction: Address Spaces
... [DV66], in which multiple processes were ready to run at a given time, and the OS would switch between them, for example when one decided to perform an I/O. Doing so increased the effective utilization of the CPU. Such increases in efficiency were particularly important in those days where each mach ...
... [DV66], in which multiple processes were ready to run at a given time, and the OS would switch between them, for example when one decided to perform an I/O. Doing so increased the effective utilization of the CPU. Such increases in efficiency were particularly important in those days where each mach ...
A Tour of Computer Systems - Computer Systems: A Programmer`s
... What is the difference between a static variable and a global variable? What happens if you define two global variables in different C files with the same name? What is the difference between a static library and a dynamic library? Why does it matter what order we list libraries on the command line? ...
... What is the difference between a static variable and a global variable? What happens if you define two global variables in different C files with the same name? What is the difference between a static library and a dynamic library? Why does it matter what order we list libraries on the command line? ...
Computers: Tools for an Information Age
... Each user is given a slice of time (fraction of a second) CPU works only on that user’s tasks during its time slice Response time: the time between typed request and computer’s reply Typically used in applications with many users CP102 Module 9: Operating Systems ...
... Each user is given a slice of time (fraction of a second) CPU works only on that user’s tasks during its time slice Response time: the time between typed request and computer’s reply Typically used in applications with many users CP102 Module 9: Operating Systems ...
Abstract View of System Components
... • The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). • A job swapped in and out of memory to the disk. • On-line communication between the user and the system is provided; when the operating system finishes the ...
... • The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). • A job swapped in and out of memory to the disk. • On-line communication between the user and the system is provided; when the operating system finishes the ...
What is an Operating System?
... • Time-Sharing Systems provide the following: – On-Line file system, where the files are on a collection of disks. Therefore, disk management must be provided. – A mechanism for concurrent execution, which requires CPU scheduling schemes. – Mechanisms for job synchronization and communication to ens ...
... • Time-Sharing Systems provide the following: – On-Line file system, where the files are on a collection of disks. Therefore, disk management must be provided. – A mechanism for concurrent execution, which requires CPU scheduling schemes. – Mechanisms for job synchronization and communication to ens ...
Limited Direct Execution
... exactly like a typical procedure call in C; that is, if it looks just like a procedure call, how does the system know it’s a system call, and do all the right stuff? The simple reason: it is a procedure call, but hidden in- side that procedure call is the famous trap instruction. More specifically, ...
... exactly like a typical procedure call in C; that is, if it looks just like a procedure call, how does the system know it’s a system call, and do all the right stuff? The simple reason: it is a procedure call, but hidden in- side that procedure call is the famous trap instruction. More specifically, ...
Introduction to Operating System Concepts Free books Specialist
... resources and allocates them to specific programs and users as necessary for their tasks. Since there may be many, possibly conflicting requests for resources, the operating system must decide which requests are allocated resources to operate the computer system efficiently and fairly." Silbershatz, ...
... resources and allocates them to specific programs and users as necessary for their tasks. Since there may be many, possibly conflicting requests for resources, the operating system must decide which requests are allocated resources to operate the computer system efficiently and fairly." Silbershatz, ...
rtos-concepts
... reentrant function : can be used by more than one task without fear of data corruption. non-reentrant function : cannot be shared by more than one task unless mutual exclusion to the function is ensured by either using a semaphore, by disabling interrupts during critical sections of code. A reentran ...
... reentrant function : can be used by more than one task without fear of data corruption. non-reentrant function : cannot be shared by more than one task unless mutual exclusion to the function is ensured by either using a semaphore, by disabling interrupts during critical sections of code. A reentran ...
Chapter 1 and 2 Computer System and Operating
... Operating Systems • It may be easier to understand the key requirements of an OS by considering the evolution of Operating Systems • Stages include ...
... Operating Systems • It may be easier to understand the key requirements of an OS by considering the evolution of Operating Systems • Stages include ...
python - WordPress.com
... However, reload(name) will re-run execution • We can also directly import names from a module into the importing module’s symbol table – from mod import m1, m2 (or *) – If m1 is a function, then call it with m1() ...
... However, reload(name) will re-run execution • We can also directly import names from a module into the importing module’s symbol table – from mod import m1, m2 (or *) – If m1 is a function, then call it with m1() ...
• Chapter 1: Introduction
... • Time-Sharing Systems provide the following: – On-Line file system, where the files are on a collection of disks. Therefore, disk management must be provided. – A mechanism for concurrent execution, which requires CPU scheduling schemes. – Mechanisms for job synchronization and communication to ens ...
... • Time-Sharing Systems provide the following: – On-Line file system, where the files are on a collection of disks. Therefore, disk management must be provided. – A mechanism for concurrent execution, which requires CPU scheduling schemes. – Mechanisms for job synchronization and communication to ens ...
3.4.1 Shared-Memory Systems
... shares data with other processes is a cooperating process. There are several reasons for providing an environment that allows process cooperation: - Information sharing. Since several users may be interested in the same piece of information (for instance, a shared file), we must provide an environme ...
... shares data with other processes is a cooperating process. There are several reasons for providing an environment that allows process cooperation: - Information sharing. Since several users may be interested in the same piece of information (for instance, a shared file), we must provide an environme ...
3.1 What are the five major activities of an operating system in
... directive for a computer system is the correct execution of programs, hence the responsibility of this service cannot be shifted to user-level programs. 3.7 What is the purpose of the system calls? System calls provide the interface between processes and the operating system. These calls are usually ...
... directive for a computer system is the correct execution of programs, hence the responsibility of this service cannot be shifted to user-level programs. 3.7 What is the purpose of the system calls? System calls provide the interface between processes and the operating system. These calls are usually ...
lecture2
... Linux is a UNIX-like operating system that runs on many different computers. Linux was first released in 1991 by its author Linus Torvalds at the University of Helsinki and developed by Linus Torvalds (author) and Andrew Morton. Linux is the operating system kernel, which comes with a distribution o ...
... Linux is a UNIX-like operating system that runs on many different computers. Linux was first released in 1991 by its author Linus Torvalds at the University of Helsinki and developed by Linus Torvalds (author) and Andrew Morton. Linux is the operating system kernel, which comes with a distribution o ...
lec01 - CSE @ UCR
... You are graded for how well your code works, not for how many hours you have put in or how many lines of code you wrote Debugging is integral process of development ...
... You are graded for how well your code works, not for how many hours you have put in or how many lines of code you wrote Debugging is integral process of development ...
CS 153 Design of Operating Systems
... You are graded for how well your code works, not for how many hours you have put in or how many lines of code you wrote Debugging is integral process of development ...
... You are graded for how well your code works, not for how many hours you have put in or how many lines of code you wrote Debugging is integral process of development ...
Processes
... • Threads provide a mechanism that allows sequential processes to make blocking system calls while also achieving parallelism. ...
... • Threads provide a mechanism that allows sequential processes to make blocking system calls while also achieving parallelism. ...
Slide 1
... separate – it means that printouts will not be muddled up. • Lets the processor get on with something else while the jobs are queued ...
... separate – it means that printouts will not be muddled up. • Lets the processor get on with something else while the jobs are queued ...
What is an Operating System?
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to ...
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to ...