ppt
... • Traditionally, most communication has been done through shared memory • The costs grow approximately linearly with the number of threads and how many lines are modified in the cache. • When 16 cores are modiying the same data it takes almost 12,000 extra cycles to perform the update. ...
... • Traditionally, most communication has been done through shared memory • The costs grow approximately linearly with the number of threads and how many lines are modified in the cache. • When 16 cores are modiying the same data it takes almost 12,000 extra cycles to perform the update. ...
Chapter I Introduction
... Protecting users’ files • Key idea is to prevent users’ programs from directly accessing the disk • Will require I/O operations to be performed by the kernel • Make them privileged instructions that only the kernel can execute ...
... Protecting users’ files • Key idea is to prevent users’ programs from directly accessing the disk • Will require I/O operations to be performed by the kernel • Make them privileged instructions that only the kernel can execute ...
CENG334 Introduction to Operating Systems
... Interrupts – a primer An interrupt or exception is a signal that causes the CPU to jump to a pre-defined instruction – called the interrupt or exception handler ...
... Interrupts – a primer An interrupt or exception is a signal that causes the CPU to jump to a pre-defined instruction – called the interrupt or exception handler ...
week 24 - Memory, storage, processors and operating systems
... Memory is used to store information within a computer, either programs or data. Programs and data cannot be used directly from a disk or CD, but must first be moved in memory: RAM and ROM Cache Memory Hierarchies ...
... Memory is used to store information within a computer, either programs or data. Programs and data cannot be used directly from a disk or CD, but must first be moved in memory: RAM and ROM Cache Memory Hierarchies ...
Midterm Review
... The operating system is divided into a number of layers (levels), each built on top of lower layers. The bottom layer (layer 0), is the hardware; the highest (layer N) is the user interface. With modularity, layers are selected such that each uses functions (operations) and services of only lower-le ...
... The operating system is divided into a number of layers (levels), each built on top of lower layers. The bottom layer (layer 0), is the hardware; the highest (layer N) is the user interface. With modularity, layers are selected such that each uses functions (operations) and services of only lower-le ...
Language Based Operating Systems
... A virtual machine (often abreviated VM) is a hardware abstraction designed to perform some task or execute instructions designed for it rather than the actual environment it is deployed in. It may encapsulate some functionality, or emulate an existing machine. Common examples of VMs in programming a ...
... A virtual machine (often abreviated VM) is a hardware abstraction designed to perform some task or execute instructions designed for it rather than the actual environment it is deployed in. It may encapsulate some functionality, or emulate an existing machine. Common examples of VMs in programming a ...
Linux Basics
... allocate new memory for a process, as each new page can be allocated from anywhere in physical memory. Parts of an application's memory can be "swapped out" to other forms of storage. This happens to memory that is seldom used and it allows the application to act as if it has a much larger working m ...
... allocate new memory for a process, as each new page can be allocated from anywhere in physical memory. Parts of an application's memory can be "swapped out" to other forms of storage. This happens to memory that is seldom used and it allows the application to act as if it has a much larger working m ...
Chapter 4 - Killarney Secondary School
... Types of DOS Files Hidden File – The user will not see hidden files when using a normal file search Read Only – The user can open and read this type of file but cannot modify the file in any way. Archive – The archive contains a backup copy of files. System File – The DOS operating system mu ...
... Types of DOS Files Hidden File – The user will not see hidden files when using a normal file search Read Only – The user can open and read this type of file but cannot modify the file in any way. Archive – The archive contains a backup copy of files. System File – The DOS operating system mu ...
Virtual Memory - classes.cs.uchicago.edu
... Hardware utilizes the information in page table to perform fast address translation The hardware component is called the MMU (memory management unit) ...
... Hardware utilizes the information in page table to perform fast address translation The hardware component is called the MMU (memory management unit) ...
Paging
... Memory Management Uni-program Memory split into two parts. one for Operating System. one for currently executing program. ...
... Memory Management Uni-program Memory split into two parts. one for Operating System. one for currently executing program. ...
Computer Organization
... • Understanding assembly key to understanding machinelevel execution model – Behavior of programs in presence of bugs • High-level language model breaks down – Tuning program performance • Understanding sources of program inefficiency – Implementing system software • Compiler has machine code as tar ...
... • Understanding assembly key to understanding machinelevel execution model – Behavior of programs in presence of bugs • High-level language model breaks down – Tuning program performance • Understanding sources of program inefficiency – Implementing system software • Compiler has machine code as tar ...
Chapter 3 Operating Systems
... - with its own program counter indicating the next instruction to execute. Each process creates its own context (= process state). There may be more than one process for the same program (e.g., start two different editor programs). ...
... - with its own program counter indicating the next instruction to execute. Each process creates its own context (= process state). There may be more than one process for the same program (e.g., start two different editor programs). ...
The Mach System Abraham Silberschatz, Peter Baer Galvin, Greg
... Security – Services run as lower level user processes have restricted access to system resources Configurability – Can change service without restarting system Easier Coding – Easier to write user mode code Lower memory footprint – user mode service code can be moved out of memory Near real time per ...
... Security – Services run as lower level user processes have restricted access to system resources Configurability – Can change service without restarting system Easier Coding – Easier to write user mode code Lower memory footprint – user mode service code can be moved out of memory Near real time per ...
Operating Systems
... • Compile time: If memory location known a priori, absolute code can be generated; must recompile code if starting location changes. • Load time: Must generate relocatable code if memory location is not known at compile time. • Execution time: Binding delayed until run time if the process can be mov ...
... • Compile time: If memory location known a priori, absolute code can be generated; must recompile code if starting location changes. • Load time: Must generate relocatable code if memory location is not known at compile time. • Execution time: Binding delayed until run time if the process can be mov ...
slides - Embedded System and Wireless Networking Lab National
... Time sharing is frequently used in interactive ...
... Time sharing is frequently used in interactive ...
ppt - Dave Reed`s
... Graphical User Interface (GUI) introduced by Macintosh Mac-OS (1984), Windows (1985), Motif (1989) WIMP (Windows/Icons/Menus/Pointer) interface was pioneered by Doug Engelbart in 1960's, first adopted at Xerox PARC ...
... Graphical User Interface (GUI) introduced by Macintosh Mac-OS (1984), Windows (1985), Motif (1989) WIMP (Windows/Icons/Menus/Pointer) interface was pioneered by Doug Engelbart in 1960's, first adopted at Xerox PARC ...
ppt - Dave Reed
... Graphical User Interface (GUI) introduced by Macintosh Mac-OS (1984), Windows (1985), Motif (1989) WIMP (Windows/Icons/Menus/Pointer) interface was pioneered by Doug Engelbart in 1960's, first adopted at Xerox PARC ...
... Graphical User Interface (GUI) introduced by Macintosh Mac-OS (1984), Windows (1985), Motif (1989) WIMP (Windows/Icons/Menus/Pointer) interface was pioneered by Doug Engelbart in 1960's, first adopted at Xerox PARC ...
Chapter_7
... -Batch Systems. The programmer does not have any control or interactions during the execution of his Jobs (programs). -Time-Sharing Systems efficiently use computer resources because it allows several programs to share resources. Each program is allowed to use the resource only if it is available a ...
... -Batch Systems. The programmer does not have any control or interactions during the execution of his Jobs (programs). -Time-Sharing Systems efficiently use computer resources because it allows several programs to share resources. Each program is allowed to use the resource only if it is available a ...
CST1215 Operating System Fundamentals
... 20. Solve problems involving process control, mutual exclusion, deadlock and synchronization. 21. Identify the major components of an operating system and explain their functions individually, 22. Discuss the operating system features required for a particular target application, 23. Understand the ...
... 20. Solve problems involving process control, mutual exclusion, deadlock and synchronization. 21. Identify the major components of an operating system and explain their functions individually, 22. Discuss the operating system features required for a particular target application, 23. Understand the ...
Slide Set 1
... A thread, or thread of execution, is the set of instructions being executed in a process. In a single thread system each process has exactly one execution engine (the logical machine). In a multi-thread environment, a process may have many execution engines, one for each thread. Thus, each thread ha ...
... A thread, or thread of execution, is the set of instructions being executed in a process. In a single thread system each process has exactly one execution engine (the logical machine). In a multi-thread environment, a process may have many execution engines, one for each thread. Thus, each thread ha ...
Operating Systems
... the size of the programs and data to be processed. Memory allocation must be managed to prevent applications from running out of memory. Operating systems can be divided into two broad categories of memory management: monoprogramming and multiprogramming. ...
... the size of the programs and data to be processed. Memory allocation must be managed to prevent applications from running out of memory. Operating systems can be divided into two broad categories of memory management: monoprogramming and multiprogramming. ...
CS350-01-intro - dforeman.cs.bingh
... get more work done in a fixed time allow multiple users on 1 computer allow programs to interact with each other maximize memory and CPU utilization reduce the need for device handling allow programs' parts to be shared make the system more usable (friendlier?) make system faster ...
... get more work done in a fixed time allow multiple users on 1 computer allow programs to interact with each other maximize memory and CPU utilization reduce the need for device handling allow programs' parts to be shared make the system more usable (friendlier?) make system faster ...
Operating Systems Review
... 5. In OLE, a copied object retains a link to its original file. 6. Windows 95/98 can not run old DOS programs. 7. DOS was designed to recognize only 640 KB of RAM. 8. A hard drive with 90% fragmentation will run better that one ...
... 5. In OLE, a copied object retains a link to its original file. 6. Windows 95/98 can not run old DOS programs. 7. DOS was designed to recognize only 640 KB of RAM. 8. A hard drive with 90% fragmentation will run better that one ...
