Slide 1
... Automated System Recovery (ASR) Dynamic disk support Fax service Internet Information Services (IIS)/Personal Web server Encrypting File System (EFS) continued ...
... Automated System Recovery (ASR) Dynamic disk support Fax service Internet Information Services (IIS)/Personal Web server Encrypting File System (EFS) continued ...
Sistemas Operativos
... • Process scheduler selects among available processes for next execution on CPU • Maintains scheduling queues of processes – Job queue – set of all processes in the system – Ready queue – set of all processes residing in main memory, ready and waiting to execute – Device queues – set of processes wa ...
... • Process scheduler selects among available processes for next execution on CPU • Maintains scheduling queues of processes – Job queue – set of all processes in the system – Ready queue – set of all processes residing in main memory, ready and waiting to execute – Device queues – set of processes wa ...
Document
... 11. Explain the facilities provided by the following operating system 12. List out the services provided by operating systems to programs and to the 13. Define operating system and list out the function and component of operating system. 14. Explain in detail the modern computer system 15. Explain t ...
... 11. Explain the facilities provided by the following operating system 12. List out the services provided by operating systems to programs and to the 13. Define operating system and list out the function and component of operating system. 14. Explain in detail the modern computer system 15. Explain t ...
(1) What is operating System? Explain the abstract view of the
... interface in terms of parameters and results, and each one is free to call any other one, if the latter provides some useful computation that the former needs. To construct the actual object program of the operating system, when this approach is used, one first compiles all the individual procedure ...
... interface in terms of parameters and results, and each one is free to call any other one, if the latter provides some useful computation that the former needs. To construct the actual object program of the operating system, when this approach is used, one first compiles all the individual procedure ...
Factored Operating Systems (fos)
... Contemporary operating systems which execute on multi-processor systems have evolved from uni-processor operating systems. The most simplistic form of this evolution was the addition of a single big kernel lock which prevents multiple threads from simultaneously entering the kernel. Allowing only on ...
... Contemporary operating systems which execute on multi-processor systems have evolved from uni-processor operating systems. The most simplistic form of this evolution was the addition of a single big kernel lock which prevents multiple threads from simultaneously entering the kernel. Allowing only on ...
Scheduling
... What if the environment computes for 1 msec and sends an IPC to the file server environment? Shouldn't the file server get more CPU time because it operates on behalf of all other functions? Improvements: track "recent" CPU use and run one with least recent CPU use. (Still, if you sleep long enough ...
... What if the environment computes for 1 msec and sends an IPC to the file server environment? Shouldn't the file server get more CPU time because it operates on behalf of all other functions? Improvements: track "recent" CPU use and run one with least recent CPU use. (Still, if you sleep long enough ...
Linux For Beginners - St. Louis UNIX Users Group
... "Most of the tools used with Linux are GNU software and are under the GNU copyleft." Linux applications (apps) focus on doing one job well with communications between applications implemented using well-defined public protocols and file formats. This modular design has a number of advantages, includ ...
... "Most of the tools used with Linux are GNU software and are under the GNU copyleft." Linux applications (apps) focus on doing one job well with communications between applications implemented using well-defined public protocols and file formats. This modular design has a number of advantages, includ ...
Answers to Even-numbered Exercises
... Linux is the name of the operating system kernel developed by Linus Torvalds, which has since been expanded and improved by thousands of people on the Internet. The Free Software Foundation (www.fsf.org) is the principal organizational sponsor of the GNU Project. GNU developed many of the tools, inc ...
... Linux is the name of the operating system kernel developed by Linus Torvalds, which has since been expanded and improved by thousands of people on the Internet. The Free Software Foundation (www.fsf.org) is the principal organizational sponsor of the GNU Project. GNU developed many of the tools, inc ...
Advanced Operating Systems: Review of Operating System Concepts
... – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all files, processes of that user to determine access control – Group identifier (group ID) allows set of users to be defined and controls managed, then also associated with eac ...
... – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all files, processes of that user to determine access control – Group identifier (group ID) allows set of users to be defined and controls managed, then also associated with eac ...
Lecture 1 - Rabie A. Ramadan
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs. Concurrency by multiplexing the CPUs among the processes / threads. ...
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs. Concurrency by multiplexing the CPUs among the processes / threads. ...
Module 4: Processes
... User Threads Thread management done by user-level threads library Three primary thread libraries: ...
... User Threads Thread management done by user-level threads library Three primary thread libraries: ...
What is an Operating System?
... In 1998 this was the essence of a suit filed by the United State Department of Justice against Microsoft ...
... In 1998 this was the essence of a suit filed by the United State Department of Justice against Microsoft ...
What is an Operating System?
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code ...
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code ...
A Real-Time Linux
... other soft interrupts are pending. If not, a hard return from interrupt is executed. If there are interrupts pending, then the highest priority one is processed. Linux is reasonably easy to modify because, for the most part, the kernel code controls interrupt hardware through the routines cli() and ...
... other soft interrupts are pending. If not, a hard return from interrupt is executed. If there are interrupts pending, then the highest priority one is processed. Linux is reasonably easy to modify because, for the most part, the kernel code controls interrupt hardware through the routines cli() and ...
A Real-Time Linux
... other soft interrupts are pending. If not, a hard return from interrupt is executed. If there are interrupts pending, then the highest priority one is processed. Linux is reasonably easy to modify because, for the most part, the kernel code controls interrupt hardware through the routines cli() and ...
... other soft interrupts are pending. If not, a hard return from interrupt is executed. If there are interrupts pending, then the highest priority one is processed. Linux is reasonably easy to modify because, for the most part, the kernel code controls interrupt hardware through the routines cli() and ...
Lecture 13
... In-Memory Structures and Processes • What if multiple processes have a given file open? • Should they share one control structure or have one each? • In-memory structures typically contain a cursor pointer – Indicating how far into the file data has been read/written ...
... In-Memory Structures and Processes • What if multiple processes have a given file open? • Should they share one control structure or have one each? • In-memory structures typically contain a cursor pointer – Indicating how far into the file data has been read/written ...
File Management - Cal Poly computer science
... (system calls) to actual physical storage of information more convenient abstraction than the underlying devices not strictly necessary for the operation of a computer system not ...
... (system calls) to actual physical storage of information more convenient abstraction than the underlying devices not strictly necessary for the operation of a computer system not ...
A Taxonomy of Computer Program Security Flaws, with Examples
... scheme (case DT in the Appendix) could be exploited maliciously, it was introduced innocently. Consequently, we place this flaw, and similar covert channels, in the ‘‘Nonmalicious’’ category for genesis. Virtually all exploitations of flaws, except those done as part of penetration testing, could be ...
... scheme (case DT in the Appendix) could be exploited maliciously, it was introduced innocently. Consequently, we place this flaw, and similar covert channels, in the ‘‘Nonmalicious’’ category for genesis. Virtually all exploitations of flaws, except those done as part of penetration testing, could be ...
Errors and Exception Handling
... Two machines: test and development Communicate over gdb through serial port Many systems companies have some form of this infrastructure ...
... Two machines: test and development Communicate over gdb through serial port Many systems companies have some form of this infrastructure ...
ch12
... Kernel keeps state info for I/O components, including open file tables, network connections, character device state ...
... Kernel keeps state info for I/O components, including open file tables, network connections, character device state ...
Operating System Kernels - Freie Universität Berlin
... Since the 2.6.23 kernel Linux uses a Completely Fair Scheduler (CFS) [2], [3]. On real hardware only one single task can run at once. Most fair would be running each process with 1/n of the processors physical power. So while one task runs, the other tasks that are waiting for the CPU are at a disad ...
... Since the 2.6.23 kernel Linux uses a Completely Fair Scheduler (CFS) [2], [3]. On real hardware only one single task can run at once. Most fair would be running each process with 1/n of the processors physical power. So while one task runs, the other tasks that are waiting for the CPU are at a disad ...
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.