1: Operating Systems Overview
... Concurrent threads might interfere with others. This leads to protection of resources by user/supervisor mode. These resources include: I/O Define I/O instructions as privileged; they can be executed only in Supervisor mode. System calls get us from user to supervisor mode. ...
... Concurrent threads might interfere with others. This leads to protection of resources by user/supervisor mode. These resources include: I/O Define I/O instructions as privileged; they can be executed only in Supervisor mode. System calls get us from user to supervisor mode. ...
Abstract View of System Components
... Operating System Functions What is a file allocation table (FAT)? a table of information that operating system uses to locate file on a disk. ...
... Operating System Functions What is a file allocation table (FAT)? a table of information that operating system uses to locate file on a disk. ...
ICS 143 - Introduction to Operating Systems
... On completion of I/O, device forces CPU to jump to a specific instruction address that contains the interrupt service routine. After the interrupt has been processed, CPU returns to code it was executing prior to servicing the interrupt. Principles of Operating Systems Lecture 1 ...
... On completion of I/O, device forces CPU to jump to a specific instruction address that contains the interrupt service routine. After the interrupt has been processed, CPU returns to code it was executing prior to servicing the interrupt. Principles of Operating Systems Lecture 1 ...
The History of Amoeba
... is interface that the system administrator will use to maintain the Amoeba system. Processor Pool: The second structure is the pool of processors; their functions are to be allocated to processes, run those processes and then return the results and are placed back ...
... is interface that the system administrator will use to maintain the Amoeba system. Processor Pool: The second structure is the pool of processors; their functions are to be allocated to processes, run those processes and then return the results and are placed back ...
1.01 - UCSB Computer Science
... Group identifier (group ID) allows set of users to be defined and controls managed, then also associated with each process, file Privilege escalation allows user to change to effective ID with ...
... Group identifier (group ID) allows set of users to be defined and controls managed, then also associated with each process, file Privilege escalation allows user to change to effective ID with ...
TST - retis.sssup.it - Scuola Superiore Sant`Anna
... – IDEA: extend the physical memory by using a “fast” mass storage system (disk) • Some of the processes stay in memory, some are temporarily saved on the disk • When a process must be executed, if on the disk, it is first loaded in memory and then executed • This technique is called “swapping” OS Co ...
... – IDEA: extend the physical memory by using a “fast” mass storage system (disk) • Some of the processes stay in memory, some are temporarily saved on the disk • When a process must be executed, if on the disk, it is first loaded in memory and then executed • This technique is called “swapping” OS Co ...
CS311 - NUS School of Computing
... application program is running.” “The OS may be split into a kernel which is always present and various system programs which use facilities provided by the kernel to perform higher-level housekeeping tasks, often acting as servers in a client-server relationship.” “Some would include a graphical us ...
... application program is running.” “The OS may be split into a kernel which is always present and various system programs which use facilities provided by the kernel to perform higher-level housekeeping tasks, often acting as servers in a client-server relationship.” “Some would include a graphical us ...
- JNTU World
... needed to control and synchronize computer hardware. On the first computers, with no operating system, every program needed the full hardware specification to run correctly and perform standard tasks, and its own drivers for peripheral devices like printers and punched paper card readers. The growin ...
... needed to control and synchronize computer hardware. On the first computers, with no operating system, every program needed the full hardware specification to run correctly and perform standard tasks, and its own drivers for peripheral devices like printers and punched paper card readers. The growin ...
INF5070 – Media Storage and Distribution Systems
... typically have soft deadlines (may miss a frame) are non-critical (user may be annoyed, but …) have periodic processing requirements (e.g., each 33 ms in a 30 fps video) ...
... typically have soft deadlines (may miss a frame) are non-critical (user may be annoyed, but …) have periodic processing requirements (e.g., each 33 ms in a 30 fps video) ...
COS 318: Operating Systems Virtual Machine Monitors Jaswinder Pal Singh
... ESX Server – Memory Virtualization Maintains shadow page tables with virtual to machine address mappings. u Shadow page tables are used by the physical processor u ESX maintains the pmap data structure for each VM with “physical” to machine address mappings u ESX can easily remap a machine pa ...
... ESX Server – Memory Virtualization Maintains shadow page tables with virtual to machine address mappings. u Shadow page tables are used by the physical processor u ESX maintains the pmap data structure for each VM with “physical” to machine address mappings u ESX can easily remap a machine pa ...
Proceedings of the General Track: 2003 USENIX Annual Technical Conference
... guest applications run as a single process (the guestmachine process) on a host Linux operating system. UMLinux provides a higher-level interface to the guest operating system that is similar but not identical to the underlying hardware. As a result, the machine-dependent portion of the guest Linux ...
... guest applications run as a single process (the guestmachine process) on a host Linux operating system. UMLinux provides a higher-level interface to the guest operating system that is similar but not identical to the underlying hardware. As a result, the machine-dependent portion of the guest Linux ...
What is an Operating System?
... and on most computers it is the smallest convenient chunk of storage. For example, most computers don’t have an instruction to move a bit but do have one to move a byte. A less common term is word, which is a given computer architecture’s native unit of data. A word is made up of one or more bytes. ...
... and on most computers it is the smallest convenient chunk of storage. For example, most computers don’t have an instruction to move a bit but do have one to move a byte. A less common term is word, which is a given computer architecture’s native unit of data. A word is made up of one or more bytes. ...
Operating Systems Threads
... • threads differ (roughly) only in hardware contexts (PC, SP, registers), which can be manipulated by user-level code • the thread package multiplexes user-level threads on top of kernel thread(s) • each kernel thread is treated as a “virtual processor” – we call these user-level threads ...
... • threads differ (roughly) only in hardware contexts (PC, SP, registers), which can be manipulated by user-level code • the thread package multiplexes user-level threads on top of kernel thread(s) • each kernel thread is treated as a “virtual processor” – we call these user-level threads ...
Chapter 9 Linux Installation Procedures
... can be used in either text mode or GUI mode – XF86Setup: - This tool can only be used in GUI mode ...
... can be used in either text mode or GUI mode – XF86Setup: - This tool can only be used in GUI mode ...
PPT Chapter 07
... group of processes from same user or application • Ensures an equitable use of the CPU by processes belonging to different users or different applications • Lottery scheduling is a technique for sharing a resource in a probabilistically fair manner – Tickets are issued to applications (or users) on ...
... group of processes from same user or application • Ensures an equitable use of the CPU by processes belonging to different users or different applications • Lottery scheduling is a technique for sharing a resource in a probabilistically fair manner – Tickets are issued to applications (or users) on ...
Chapter 1: Introduction What is an Operating System?
... the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, database systems, ...
... the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, database systems, ...
What is an Operating System?
... 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 execut ...
... 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 execut ...
pdf-1 - IFSC-USP
... the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, database systems, ...
... the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, database systems, ...
Abstract View of System Components
... the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, database systems, ...
... the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, database systems, ...
P - GCG-42
... from each other, and from changing operating-system code and data. – Relocation register contains value of smallest physical address; limit register contains range of logical addresses – each logical address must be less than the limit register. ...
... from each other, and from changing operating-system code and data. – Relocation register contains value of smallest physical address; limit register contains range of logical addresses – each logical address must be less than the limit register. ...
Chapter 13 PPT Silberschatz slides (Our Text Book) on I/O systems
... Spooling - a buffer holding output/(input too) for a device If device can serve only one request at a time Avoids queuing applications making requests. Data from an application is saved in a unique file associated with the application AND the particular request. Could be saved in files on a ...
... Spooling - a buffer holding output/(input too) for a device If device can serve only one request at a time Avoids queuing applications making requests. Data from an application is saved in a unique file associated with the application AND the particular request. Could be saved in files on a ...
Chapter 2
... • Thompson and Ritchie’s first UNIX on a PDP-7: a mechanism to support program development (1969) • Thompson’s B language (interpreted) used as a language for development (1970) • Ritchie evolved B into C, a compiled language (1971) • UNIX rewritten in C (1973) ...
... • Thompson and Ritchie’s first UNIX on a PDP-7: a mechanism to support program development (1969) • Thompson’s B language (interpreted) used as a language for development (1970) • Ritchie evolved B into C, a compiled language (1971) • UNIX rewritten in C (1973) ...
Operating System Support for Virtual Machines
... guest applications run as a single process (the guestmachine process) on a host Linux operating system. UMLinux provides a higher-level interface to the guest operating system that is similar but not identical to the underlying hardware. As a result, the machine-dependent portion of the guest Linux ...
... guest applications run as a single process (the guestmachine process) on a host Linux operating system. UMLinux provides a higher-level interface to the guest operating system that is similar but not identical to the underlying hardware. As a result, the machine-dependent portion of the guest Linux ...
Operating System Support for Virtual Machines
... guest applications run as a single process (the guestmachine process) on a host Linux operating system. UMLinux provides a higher-level interface to the guest operating system that is similar but not identical to the underlying hardware. As a result, the machine-dependent portion of the guest Linux ...
... guest applications run as a single process (the guestmachine process) on a host Linux operating system. UMLinux provides a higher-level interface to the guest operating system that is similar but not identical to the underlying hardware. As a result, the machine-dependent portion of the guest Linux ...