Multiprocessor and Distributed Systems
... • The most common means for remote communication • Used both by operating systems and by applications – NFS is implemented as a set of RPCs – DCOM, CORBA, Java RMI, etc., are just RPC systems ...
... • The most common means for remote communication • Used both by operating systems and by applications – NFS is implemented as a set of RPCs – DCOM, CORBA, Java RMI, etc., are just RPC systems ...
L4_L6_System_Structu..
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
PPT - LSU CCT - Louisiana State University
... • Operating system provides an environment to execute programs. Following are some of the services an Operating System provides : • Program execution: ability to load a program into memory and execute the program. Program must be able to end execution normally or abnormally. • I/O operations: help i ...
... • Operating system provides an environment to execute programs. Following are some of the services an Operating System provides : • Program execution: ability to load a program into memory and execute the program. Program must be able to end execution normally or abnormally. • I/O operations: help i ...
Lecture3-os-support
... disk or a network FS) I/O takes much longer than computation Overlapping I/O with computation to ...
... disk or a network FS) I/O takes much longer than computation Overlapping I/O with computation to ...
ch12
... Role of Network Management • The Network Manager – Routinely synchronizes the load among remote processors – Tries to select most efficient communication paths over multiple data communication lines – Allows network administrator to monitor use of individual computers and shared hardware – Ensures ...
... Role of Network Management • The Network Manager – Routinely synchronizes the load among remote processors – Tries to select most efficient communication paths over multiple data communication lines – Allows network administrator to monitor use of individual computers and shared hardware – Ensures ...
Unix processes and threads
... invokes command string from program e.g., system("date > file"); handled by shell (/usr/bin/ksh) never call from setuid programs ...
... invokes command string from program e.g., system("date > file"); handled by shell (/usr/bin/ksh) never call from setuid programs ...
1.01 - UCSB Computer Science
... Protection – any mechanism for controlling access of processes or ...
... Protection – any mechanism for controlling access of processes or ...
ppt - UF CISE
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
Chapter 2: Operating-System Structures
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
2.01 - CINVESTAV
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
System Structures
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
... Booting – starting a computer by loading the kernel Bootstrap program – code stored in ROM that is able to locate the kernel, ...
Processes and Threads
... Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block p ...
... Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block p ...
Introduction:- CS-502 Operating Systems
... security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happens if something goes wrong – hardware or software extensibility: can we add new features? communication: ...
... security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happens if something goes wrong – hardware or software extensibility: can we add new features? communication: ...
Operating Systems File System File System File System Functions
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
Operating Systems
... Installation of an Operating System Complete a pre-installation checklist for installing an operating system Verify hardware will work ...
... Installation of an Operating System Complete a pre-installation checklist for installing an operating system Verify hardware will work ...
Operating Systems
... Installation of an Operating System Complete a pre-installation checklist for installing an operating system Verify hardware will work ...
... Installation of an Operating System Complete a pre-installation checklist for installing an operating system Verify hardware will work ...
Operating System Services
... treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare ...
... treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare ...
Linux+ Guide to Linux Certification
... multi-user functions multi-process system functions which was architecturally independent All of which was permanent and transparent to the user. ...
... multi-user functions multi-process system functions which was architecturally independent All of which was permanent and transparent to the user. ...
Processes and threads
... The OS only sees one thread per process. The process constructs other threads by user-level library calls or by hand. User-level control over starting and stopping threads. Usually a request is made to the OS to interrupt the process regularly (an alarm clock) so that the process can schedule anothe ...
... The OS only sees one thread per process. The process constructs other threads by user-level library calls or by hand. User-level control over starting and stopping threads. Usually a request is made to the OS to interrupt the process regularly (an alarm clock) so that the process can schedule anothe ...
IV. Parallel Operating Systems
... Great diversity marked the beginning of parallel architectures and their operating systems. This diversity has since been reduced to a small set of dominating con gurations: symmetric multiprocessors running commodity applications and operating systems (UNIX and Windows NT) and multicomputers runnin ...
... Great diversity marked the beginning of parallel architectures and their operating systems. This diversity has since been reduced to a small set of dominating con gurations: symmetric multiprocessors running commodity applications and operating systems (UNIX and Windows NT) and multicomputers runnin ...
What is an Operating System?
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs ...
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs ...
What is an Operating System?
... ■ Software errors (exceptions or traps) too ■ User program requests (like open file, talk to the net) too ■ Processes should not be allowed to access other processes space ■ Dualmode operation allows OS to protect itself and other system ...
... ■ Software errors (exceptions or traps) too ■ User program requests (like open file, talk to the net) too ■ Processes should not be allowed to access other processes space ■ Dualmode operation allows OS to protect itself and other system ...
204341 Operating Systems
... Computer-System Operation I/O devices and the CPU can execute concurrently Each device controller is in charge of a particular device type Each device controller has a local buffer CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controlle ...
... Computer-System Operation I/O devices and the CPU can execute concurrently Each device controller is in charge of a particular device type Each device controller has a local buffer CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controlle ...
Plan 9 from Bell Labs
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Plan 9 from Bell Labs is a distributed operating system, originally developed by the Computing Sciences Research Center at Bell Labs between the mid-1980s and 2002. It takes some of the principles of Unix, developed in the same research group, but extends these to a networked environment with graphics terminals.In Plan 9, virtually all computing resources, including files, network connections, and peripheral devices, are represented through the file system rather than specialized interfaces. A unified network protocol called 9P ties a network of computers running Plan 9 together, allowing them to share all resources so represented.The name Plan 9 from Bell Labs is a reference to the Ed Wood 1959 cult science fiction Z-movie Plan 9 from Outer Space. Also, Glenda, the Plan 9 Bunny, is presumably a reference to Wood's film Glen or Glenda. The system continues to be used and developed by operating system researchers and hobbyists.