course syllabus
... By the end of the semester, students in this course would have developed their own basic functions of an operating system through the completion of a series of laboratory assignment. The lectures will help to familiarize students with the main concepts of an operating system. Technical Requirements: ...
... By the end of the semester, students in this course would have developed their own basic functions of an operating system through the completion of a series of laboratory assignment. The lectures will help to familiarize students with the main concepts of an operating system. Technical Requirements: ...
1.2 Operating System Structure
... • Each component hides how it performs its job and presents a standard interface that other components can use to request its services • In a layer approach, a user process’s request may need to pass through many layers before it is services • Early example of layer OS is THE (Technische Hogeschool ...
... • Each component hides how it performs its job and presents a standard interface that other components can use to request its services • In a layer approach, a user process’s request may need to pass through many layers before it is services • Early example of layer OS is THE (Technische Hogeschool ...
different people attempt to accomplish the
... taking marked-up text, formatting it, and producing a table of contents, all on a computer that used two 8-inch floppy disks for file storage. Compiling the 16-page program took about 15 minutes, and using the finished program, written in PL/Z (Zilog’s version of PL/I) took a long time too. After I ...
... taking marked-up text, formatting it, and producing a table of contents, all on a computer that used two 8-inch floppy disks for file storage. Compiling the 16-page program took about 15 minutes, and using the finished program, written in PL/Z (Zilog’s version of PL/I) took a long time too. After I ...
Intro. to Computer - web page for staff
... sometimes used to increase the speed of processing by making current programs and data available to the CPU at a rapid rate. The cache memory is employed in computer systems to compensate for the speed differential between main memory access time, with the result that processing speed is limited pri ...
... sometimes used to increase the speed of processing by making current programs and data available to the CPU at a rapid rate. The cache memory is employed in computer systems to compensate for the speed differential between main memory access time, with the result that processing speed is limited pri ...
Lecture 4: September 11 4.1 Processes 4.2 Memory and Secondary
... that has the ability to run several computer programs concurrently. A computer program itself is just a passive collection of instructions, while a process is the actual execution of those instructions. Several processes may be associated with the same program; for example, opening up several window ...
... that has the ability to run several computer programs concurrently. A computer program itself is just a passive collection of instructions, while a process is the actual execution of those instructions. Several processes may be associated with the same program; for example, opening up several window ...
ch1 - Oklahoma State University
... – Multiprogramming organizes jobs (code and data) so CPU always has one to execute – A subset of total jobs in system is kept in memory – One job selected and run via job scheduling – When it has to wait (for I/O for example), OS switches to another job ...
... – Multiprogramming organizes jobs (code and data) so CPU always has one to execute – A subset of total jobs in system is kept in memory – One job selected and run via job scheduling – When it has to wait (for I/O for example), OS switches to another job ...
introduction to operating system
... A time-shared OS uses CPU scheduling and multiprogramming that provides each user a small portion of a time-shared computer. Each user executes his own process. 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 memo ...
... A time-shared OS uses CPU scheduling and multiprogramming that provides each user a small portion of a time-shared computer. Each user executes his own process. 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 memo ...
CSE451 Introduction to Operating Systems
... • In the very beginning… – OS was just a library of code that you linked into your program; programs were loaded in their entirety into memory, and executed – interfaces were literally switches and blinking lights ...
... • In the very beginning… – OS was just a library of code that you linked into your program; programs were loaded in their entirety into memory, and executed – interfaces were literally switches and blinking lights ...
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 ...
Overview - Seattle University
... – Multiprogramming organizes jobs (code and data) so CPU always has one to execute (i.e., increase CPU utilization) – A subset of total jobs in system is kept in memory – One job selected and run via job scheduling – When it has to wait (for I/O for example), OS switches to another job ...
... – Multiprogramming organizes jobs (code and data) so CPU always has one to execute (i.e., increase CPU utilization) – A subset of total jobs in system is kept in memory – One job selected and run via job scheduling – When it has to wait (for I/O for example), OS switches to another job ...
ppt
... VM executes instruction to access I/O Trap generated by CPU (based on memory or privilege protection) transfers control to VMM. VMM emulates I/O instruction, saving information about where this came from ...
... VM executes instruction to access I/O Trap generated by CPU (based on memory or privilege protection) transfers control to VMM. VMM emulates I/O instruction, saving information about where this came from ...
File System
... Error prone due to the amount of tasks in the kernel itself Used in most Linux systems Runs most services - like networking, filesystem, etc. - in user space More stable, but more complex designs ...
... Error prone due to the amount of tasks in the kernel itself Used in most Linux systems Runs most services - like networking, filesystem, etc. - in user space More stable, but more complex designs ...
Document
... There is only one CPU and therefore only one set of CPU registers, which contain the values for the currently executing process Each time a process is moved to the running state: – Register values for the currently running process are stored into its PCB – Its PCB is moved to the list of the state i ...
... There is only one CPU and therefore only one set of CPU registers, which contain the values for the currently executing process Each time a process is moved to the running state: – Register values for the currently running process are stored into its PCB – Its PCB is moved to the list of the state i ...
Lecture 1: What is An OS Operating Systems (A) (Honor Track)
... How different/similar do you think these OSes are? ...
... How different/similar do you think these OSes are? ...
WORD
... contains the addresses of all the service routines ◦ Incoming interrupts are disabled while another interrupt is being processed ◦ Trap is a software generated interrupt caused by error or user request ◦ OS determines which type of interrupt has occurred by polling or the vectored interrupt system S ...
... contains the addresses of all the service routines ◦ Incoming interrupts are disabled while another interrupt is being processed ◦ Trap is a software generated interrupt caused by error or user request ◦ OS determines which type of interrupt has occurred by polling or the vectored interrupt system S ...
Study Guide to Accompany Operating Systems Concepts essentials
... contains the addresses of all the service routines ◦ Incoming interrupts are disabled while another interrupt is being processed ◦ Trap is a software generated interrupt caused by error or user request ◦ OS determines which type of interrupt has occurred by polling or the vectored interrupt system S ...
... contains the addresses of all the service routines ◦ Incoming interrupts are disabled while another interrupt is being processed ◦ Trap is a software generated interrupt caused by error or user request ◦ OS determines which type of interrupt has occurred by polling or the vectored interrupt system S ...
Welcome to NETS3304/3604 Operating System Internals
... Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware among various applications and users Application programs – define the ways in which the system resources are used to solve the computing problems of the users ...
... Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware among various applications and users Application programs – define the ways in which the system resources are used to solve the computing problems of the users ...
Chapter 10
... There is only one CPU and therefore only one set of CPU registers, which contain the values for the currently executing process Each time a process is moved to the running state: – Register values for the currently running process are stored into its PCB – Its PCB is moved to the list of the state i ...
... There is only one CPU and therefore only one set of CPU registers, which contain the values for the currently executing process Each time a process is moved to the running state: – Register values for the currently running process are stored into its PCB – Its PCB is moved to the list of the state i ...
OPERATING SYSTEMS QUESTIONS
... 10. What is the cause of thrashing? How does the system detect thrashing? Once it detects thrashing, what can the system do to eliminate this problem? - Thrashing is caused by under allocation of the minimum number of pages required by a process, forcing it to continuously page fault. The system can ...
... 10. What is the cause of thrashing? How does the system detect thrashing? Once it detects thrashing, what can the system do to eliminate this problem? - Thrashing is caused by under allocation of the minimum number of pages required by a process, forcing it to continuously page fault. The system can ...
Lecture Note VIII
... Translation helps implement protection because no way for program to even talk about other program's addresses; no way for them to touch operating system code or data. Translation can be implemented in any number of ways -- typically, by some form of table lookup (we'll discuss various options for i ...
... Translation helps implement protection because no way for program to even talk about other program's addresses; no way for them to touch operating system code or data. Translation can be implemented in any number of ways -- typically, by some form of table lookup (we'll discuss various options for i ...
The Mach System
... • A thread is the basic unit of execution. A thread executes in the context of a single task. A UNIX Process = Task + thread. • A port is a simplex communication channel -- implemented as a message queue managed and protected by the kernel. - Basic object reference mechanism in MACH. - Ports are use ...
... • A thread is the basic unit of execution. A thread executes in the context of a single task. A UNIX Process = Task + thread. • A port is a simplex communication channel -- implemented as a message queue managed and protected by the kernel. - Basic object reference mechanism in MACH. - Ports are use ...
Chapter 1 Computer System Overview
... • Treats page frames allocated to a process as a circular buffer • Pages are removed in round-robin style – Simplest replacement policy to implement ...
... • Treats page frames allocated to a process as a circular buffer • Pages are removed in round-robin style – Simplest replacement policy to implement ...
ppt - Courses
... • Switching to a different thread in same process is much cheaper than switching to a different process (~5-50x) since no context switching required • Threads within same process can share data and other resources more conveniently and efficiently (than InterProcess Communication) • Threads within a ...
... • Switching to a different thread in same process is much cheaper than switching to a different process (~5-50x) since no context switching required • Threads within same process can share data and other resources more conveniently and efficiently (than InterProcess Communication) • Threads within a ...