02_OperatingSystemOverview
... • Special type of programming language to control jobs • Provides instruction to the monitor – What compiler to use – What data to use ...
... • Special type of programming language to control jobs • Provides instruction to the monitor – What compiler to use – What data to use ...
col
... CPU Mode Bit in Process Status Register • Many bits about the current process • Mode bit is just one of them • Mode bit: • 0 = user mode = untrusted: “Privileged” instructions and registers are disabled by CPU • 1 = kernel mode = trusted All instructions and registers are enabled ...
... CPU Mode Bit in Process Status Register • Many bits about the current process • Mode bit is just one of them • Mode bit: • 0 = user mode = untrusted: “Privileged” instructions and registers are disabled by CPU • 1 = kernel mode = trusted All instructions and registers are enabled ...
Operating Systems
... • Special type of programming language to control jobs • Provides instruction to the monitor – What compiler to use – What data to use ...
... • Special type of programming language to control jobs • Provides instruction to the monitor – What compiler to use – What data to use ...
Operating Systems Operating Systems Operating Systems
... The timer is usually implemented using a fixed rate clock and a counter. The counter is set to a positive value. The value of the counter is then decremented on each tick of the clock. When the counter reaches 0 an interrupt is generated. ...
... The timer is usually implemented using a fixed rate clock and a counter. The counter is set to a positive value. The value of the counter is then decremented on each tick of the clock. When the counter reaches 0 an interrupt is generated. ...
operating systems structures
... The benefits of the micro kernel approach include the ease of extending the OS. All new services are added to user space and consequently do not require modification of the kernel. When the kernel does have to be modified, the changes tend to be fewer because the micro kernel is a smaller kernel. Th ...
... The benefits of the micro kernel approach include the ease of extending the OS. All new services are added to user space and consequently do not require modification of the kernel. When the kernel does have to be modified, the changes tend to be fewer because the micro kernel is a smaller kernel. Th ...
Introduction to Windows NT/2000
... the ready or wait state, when a thread terminates, or when an application changes a thread’s priority or processor affinity. ...
... the ready or wait state, when a thread terminates, or when an application changes a thread’s priority or processor affinity. ...
Mach Memory
... The interface between data manager and MACH kernel consists of three parts: Calls by an application to map a memory object into its address space Calls by the kernel to the data manager (generally as a respond to requests of data manager) Calls by the data manager on the MACH kernel to control ...
... The interface between data manager and MACH kernel consists of three parts: Calls by an application to map a memory object into its address space Calls by the kernel to the data manager (generally as a respond to requests of data manager) Calls by the data manager on the MACH kernel to control ...
Chapter 2 Operating System Overview
... Despite overhead, the simple batch system improves utilization of the computer. ...
... Despite overhead, the simple batch system improves utilization of the computer. ...
Operating Systems CSLO - Barbara Hecker
... 2. What is the KERNEL? Describe the difference between kernel mode and user mode. Provide a complete overview of the features and utilities that most Kernels have. You should compare and contrast kernel features of different Linux/Unix/Windows systems. 3. What is a Process? What is a thread? Describ ...
... 2. What is the KERNEL? Describe the difference between kernel mode and user mode. Provide a complete overview of the features and utilities that most Kernels have. You should compare and contrast kernel features of different Linux/Unix/Windows systems. 3. What is a Process? What is a thread? Describ ...
Course Overview, History
... – Overlaps I/O processing of a job with computation of another – Benefits from I/O devices that can operate asynchronously – Requires the use of interrupts and DMA – Optimizes for throughput at the cost of response time ...
... – Overlaps I/O processing of a job with computation of another – Benefits from I/O devices that can operate asynchronously – Requires the use of interrupts and DMA – Optimizes for throughput at the cost of response time ...
Chapter 1: A Tour of Computer Systems
... (local disks) Local disks hold files retrieved from disks on remote network servers. ...
... (local disks) Local disks hold files retrieved from disks on remote network servers. ...
Chapter 1: Introduction to Computers
... Operating system allocates portion of hard disk to function like RAM o Paging o Thrashing (characterized by program stopped responding and hard disk’s LED blinking ...
... Operating system allocates portion of hard disk to function like RAM o Paging o Thrashing (characterized by program stopped responding and hard disk’s LED blinking ...
A1A_CptrArch
... interconnected by a bus or other internal connection scheme – processors share access to I/O devices – all processors can perform the same functions – the system is controlled by an integrated operating system that supports interaction between processors and their programs ...
... interconnected by a bus or other internal connection scheme – processors share access to I/O devices – all processors can perform the same functions – the system is controlled by an integrated operating system that supports interaction between processors and their programs ...
Interfacing with the Operating System
... • The operating system provides system calls for opening, reading, writing and closing files. • When you open a file in "C" (or Java) you will be invoking the appropriate operating system call. • Opening a file involves locating it, and bringing into memory information necessary to access it. • Read ...
... • The operating system provides system calls for opening, reading, writing and closing files. • When you open a file in "C" (or Java) you will be invoking the appropriate operating system call. • Opening a file involves locating it, and bringing into memory information necessary to access it. • Read ...
ppt
... – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request ...
... – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request ...
Free-Space Management
... cache, and the disk driver sorts its output queue according to disk address, to minimize disk-head seeks and to write data at times optimized for disk rotation Thus, output to the disk through the file system is often faster than ...
... cache, and the disk driver sorts its output queue according to disk address, to minimize disk-head seeks and to write data at times optimized for disk rotation Thus, output to the disk through the file system is often faster than ...
Authentication is the process of determining whether someone or
... A form of memory organization that allows 202 swapping of programs between memory and magnetic storage to give the impression of a larger main memory than really exists. The operating system manages virtual address spaces and the assignment of real memory to virtual memory. ...
... A form of memory organization that allows 202 swapping of programs between memory and magnetic storage to give the impression of a larger main memory than really exists. The operating system manages virtual address spaces and the assignment of real memory to virtual memory. ...
CUSTOMER_CODE SMUDE DIVISION_CODE SMUDE
... is the least recently used (LRU) algorithm. The LRU page replacement algorithm with 12 page faults is better than the FIFO algorithm with 15 faults. The problem is to implement the LRU algorithm. An order for the frames by time of last use is required. Two options are feasible: By use of counters ...
... is the least recently used (LRU) algorithm. The LRU page replacement algorithm with 12 page faults is better than the FIFO algorithm with 15 faults. The problem is to implement the LRU algorithm. An order for the frames by time of last use is required. Two options are feasible: By use of counters ...
Multiprogrammed Batch Systems
... Well-defined fixed-time constraints. Processing must be done within the constrained. Hard real-time system. – Guarantees that critical tasks be completed on time – Secondary storage limited or absent, data stored in short-term memory, or read-only memory (ROM) – Conflicts with time-sharing systems, ...
... Well-defined fixed-time constraints. Processing must be done within the constrained. Hard real-time system. – Guarantees that critical tasks be completed on time – Secondary storage limited or absent, data stored in short-term memory, or read-only memory (ROM) – Conflicts with time-sharing systems, ...
Operating System Structure
... – 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 deallocate memory space as needed ...
... – 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 deallocate memory space as needed ...
Operating System Services
... When it has to wait (for I/O for example), OS switches to another job ...
... When it has to wait (for I/O for example), OS switches to another job ...
