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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) ...
... necessarily trust all other libOSes with access to a particular resource. When libOSes guarantee invariants about their abstractions, they must be aware of exactly which resources are involved, what other processes have access to those resources, and what level of trust they place in those other pro ...
Operating Systems - Lecture #5: File Management
... records stored one after another any record can be found and read by knowing its starting address and size ease of direct access, every part of the file is stored in the same compact area file cant be expanded unless there is empty space immediately following it - also causing fragmentation ...
... records stored one after another any record can be found and read by knowing its starting address and size ease of direct access, every part of the file is stored in the same compact area file cant be expanded unless there is empty space immediately following it - also causing fragmentation ...
UNIX Operating System
... scanners faster and more flexibly than previous interfaces. Developed at Apple Computer and still used in the Macintosh, the present set of SCSIs are parallel interfaces. SCSI ports continue to be built into many personal computers today and are supported by all major operating systems. ...
... scanners faster and more flexibly than previous interfaces. Developed at Apple Computer and still used in the Macintosh, the present set of SCSIs are parallel interfaces. SCSI ports continue to be built into many personal computers today and are supported by all major operating systems. ...
2-Operating-System Structures
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure System Boot ...
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure System Boot ...
UNIX Notes:
... UNIX has a directory structure that is tree-like with files containing all the information that is part of the system. Most people familiar with microcomputers and MSDOS are familiar with the tree-like directory structure with directories, sub-directories and pathnames. But in UNIX/Linux the directo ...
... UNIX has a directory structure that is tree-like with files containing all the information that is part of the system. Most people familiar with microcomputers and MSDOS are familiar with the tree-like directory structure with directories, sub-directories and pathnames. But in UNIX/Linux the directo ...
ch22
... The VM manager in XP uses a page-based management scheme with a page size of 4 KB. The XP VM manager uses a two step process to allocate memory. The first step reserves a portion of the process’s address space. The second step commits the allocation by assigning space in the ...
... The VM manager in XP uses a page-based management scheme with a page size of 4 KB. The XP VM manager uses a two step process to allocate memory. The first step reserves a portion of the process’s address space. The second step commits the allocation by assigning space in the ...
No Slide Title
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
UNIX Notes:
... UNIX has a directory structure that is tree-like with files containing all the information that is part of the system. Most people familiar with microcomputers and MSDOS are familiar with the tree-like directory structure with directories, sub-directories and pathnames. But in UNIX/Linux the directo ...
... UNIX has a directory structure that is tree-like with files containing all the information that is part of the system. Most people familiar with microcomputers and MSDOS are familiar with the tree-like directory structure with directories, sub-directories and pathnames. But in UNIX/Linux the directo ...
Embedded Operating Systems for Real
... Providing Common User Interface: A user interface (UI) brings a formal structure to the interaction between a user and the computer. Recently all developments in user interfaces have been in the area of the graphical user interface (GUI). Apple's Macintosh and Microsoft's Windows are the popular GUI ...
... Providing Common User Interface: A user interface (UI) brings a formal structure to the interaction between a user and the computer. Recently all developments in user interfaces have been in the area of the graphical user interface (GUI). Apple's Macintosh and Microsoft's Windows are the popular GUI ...
9.1_RT-Vocabulary
... Task Assignment and Scheduling Objective: allocation and scheduling of tasks on processors to ensure that deadlines are met ...
... Task Assignment and Scheduling Objective: allocation and scheduling of tasks on processors to ensure that deadlines are met ...
Module 3: Operating
... protection of system resources since each virtual machine is isolated from all other virtual machines. This isolation, however, permits no direct sharing of resources – shared only thru emulator. A virtual-machine system is a perfect vehicle for operating-systems research and development. System d ...
... protection of system resources since each virtual machine is isolated from all other virtual machines. This isolation, however, permits no direct sharing of resources – shared only thru emulator. A virtual-machine system is a perfect vehicle for operating-systems research and development. System d ...
Best algorithms + best computers = powerful match
... 2.2. A race-free model for shared state Conventional systems give threads concurrent access to many forms of shared state, such as shared memory and file systems, yielding data races and heisenbugs if the threads are improperly synchronized.20, 21 Replay debuggers19 and deterministic schedulers8, 22 ...
... 2.2. A race-free model for shared state Conventional systems give threads concurrent access to many forms of shared state, such as shared memory and file systems, yielding data races and heisenbugs if the threads are improperly synchronized.20, 21 Replay debuggers19 and deterministic schedulers8, 22 ...
Ceng 334 - Operating Systems
... • CPU_usage, represents the average number of clock ticks per second that the process has had during the past few seconds • Nice is a value between –20 to 20 (default 0). Nice system call can be used to set this value 0-20 • Base is a system parameter in UNIX source code • The scheduler forces CPU b ...
... • CPU_usage, represents the average number of clock ticks per second that the process has had during the past few seconds • Nice is a value between –20 to 20 (default 0). Nice system call can be used to set this value 0-20 • Base is a system parameter in UNIX source code • The scheduler forces CPU b ...
Slides
... Several pieces of data are needed to manage open files: File pointer: pointer to last read/write location, per process that has the file open File-open count: counter of number of times a file is open – to allow removal of data from open-file table when last processes closes it Disk location ...
... Several pieces of data are needed to manage open files: File pointer: pointer to last read/write location, per process that has the file open File-open count: counter of number of times a file is open – to allow removal of data from open-file table when last processes closes it Disk location ...
Windows 2000
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
ch21
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
PPT
... Load Sharing One of the most commonly used schemes in current multiprocessors, despite the potential disadvantages • Load is distributed evenly across the processors ...
... Load Sharing One of the most commonly used schemes in current multiprocessors, despite the potential disadvantages • Load is distributed evenly across the processors ...
File
... 2. Provide a reliable environment for the running of programs. 3. Handle errors reasonably and with sufficient feedback. 4. Provide services (tools, languages) for users. 5. Hide the details of hardware and resource management from users. 6. Protect users from one another, and the operating system f ...
... 2. Provide a reliable environment for the running of programs. 3. Handle errors reasonably and with sufficient feedback. 4. Provide services (tools, languages) for users. 5. Hide the details of hardware and resource management from users. 6. Protect users from one another, and the operating system f ...
Scheduling Techniques for Operating Systems
... received considerable attention since the very early days of computing, and that many techniques for accomplishing this essential task have been developed. These have been variously simulated, analyzed mathematically, and occasionally, implemented in actual systems. This paper looks at some techniqu ...
... received considerable attention since the very early days of computing, and that many techniques for accomplishing this essential task have been developed. These have been variously simulated, analyzed mathematically, and occasionally, implemented in actual systems. This paper looks at some techniqu ...
No Slide Title
... decisions, I/O processing, and other system activities; while the other processors just execute user code. ...
... decisions, I/O processing, and other system activities; while the other processors just execute user code. ...
Files and File Systems • files: persistent, named data objects – data
... • a hard link is an association between a name (string) and an i-number – each entry in a directory is a hard link • when a file is created, so is a hard link to that file – open(/a/b/c,O CREAT|O TRUNC) – this creates a new file if a file called /a/b/c does not already exist – it also creates a hard ...
... • a hard link is an association between a name (string) and an i-number – each entry in a directory is a hard link • when a file is created, so is a hard link to that file – open(/a/b/c,O CREAT|O TRUNC) – this creates a new file if a file called /a/b/c does not already exist – it also creates a hard ...
No Slide Title
... The authentication package authenticates users whenever they attempt to access an object in the system ...
... The authentication package authenticates users whenever they attempt to access an object in the system ...
THE USER VIEW OF OPERATING SYSTEMS
... branching and looping, prompted user input, and passed arguments. Command languages are also referred to as scripting languages. An interface that accepts and performs requests for operating system services directly from the user’s programs (the API). ...
... branching and looping, prompted user input, and passed arguments. Command languages are also referred to as scripting languages. An interface that accepts and performs requests for operating system services directly from the user’s programs (the API). ...
521481P INTRODUCTION TO THE USE OF WORKSTATION
... You are probably already familiar with most of the concepts, but you might not be sure how they fit into the Unix world. Operating System. Operating systems provide an interface between the computer hardware and software. In a sense, they are the translator that makes the hardware and software play ...
... You are probably already familiar with most of the concepts, but you might not be sure how they fit into the Unix world. Operating System. Operating systems provide an interface between the computer hardware and software. In a sense, they are the translator that makes the hardware and software play ...
OS 2200
![](https://commons.wikimedia.org/wiki/Special:FilePath/OS_2200_Software_Genealogy.png?width=300)
OS 2200 is the operating system for the Unisys ClearPath Dorado family of mainframe systems. The operating system kernel of OS 2200 is a lineal descendant of Exec 8 for the UNIVAC 1108. Documentation and other information on current and past Unisys systems can be found on the Unisys public support website.See Unisys 2200 Series system architecture for a description of the machine architecture and its relationship to the OS 2200 operating system.