5_disk_scheduling
... • Swap-space — Virtual memory uses disk space as an extension of main memory • Swap-space can be carved out of the normal file system, or, more commonly, it can be in a separate disk partition • Swap-space management – 4.3BSD allocates swap space when process starts; holds text segment (the program) ...
... • Swap-space — Virtual memory uses disk space as an extension of main memory • Swap-space can be carved out of the normal file system, or, more commonly, it can be in a separate disk partition • Swap-space management – 4.3BSD allocates swap space when process starts; holds text segment (the program) ...
Abstract View of System Components
... • Modern operating systems allow a process to contain multiple threads of control. • Each thread, is defined by its thread ID, program counter, register set & stack (for temporary data). • A thread shares with other threads of the same process its code section, data section, open files & other opera ...
... • Modern operating systems allow a process to contain multiple threads of control. • Each thread, is defined by its thread ID, program counter, register set & stack (for temporary data). • A thread shares with other threads of the same process its code section, data section, open files & other opera ...
CPU Scheduling
... Turnaround time also depends on the size of the time quantum. The average turnaround time of a set of processes does not necessarily improve as the timequantum size increases. In general, the average turnaround time can be improved if most processes finish their next CPU burst in a single time quant ...
... Turnaround time also depends on the size of the time quantum. The average turnaround time of a set of processes does not necessarily improve as the timequantum size increases. In general, the average turnaround time can be improved if most processes finish their next CPU burst in a single time quant ...
Synchronization - Operating System
... 3. Bounded Waiting - A bound, or limit must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request to enter its critical section and before that request is granted ...
... 3. Bounded Waiting - A bound, or limit must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request to enter its critical section and before that request is granted ...
Post Graduate Diploma in Computer Application
... Let us begin with the word ‘compute’. It means ‘to calculate’. We all are familiar with calculations in our day-to-day life. We apply mathematical operations like addition, subtraction, multiplication, etc. and many other formulae for calculations. Simpler calculations take less time. But complex ca ...
... Let us begin with the word ‘compute’. It means ‘to calculate’. We all are familiar with calculations in our day-to-day life. We apply mathematical operations like addition, subtraction, multiplication, etc. and many other formulae for calculations. Simpler calculations take less time. But complex ca ...
Trusted Operating Systems
... • Formal description of the allowable paths of information flow in a secure system • Set of subjects and another set of objects • Each subject s has a fixed security clearance C(s) • Each object o has a fixed security class C(o) ...
... • Formal description of the allowable paths of information flow in a secure system • Set of subjects and another set of objects • Each subject s has a fixed security clearance C(s) • Each object o has a fixed security class C(o) ...
Operating System Kernels - Freie Universität Berlin
... that run in kernel-mode like all device drivers, dispatcher,scheduling, virtual memory, all inter-process communication (not only the simple IPC as in a microkernel), the (virtual) file system and the system calls, so only applications run in user-mode. The monolithic kernel is implemented as one pr ...
... that run in kernel-mode like all device drivers, dispatcher,scheduling, virtual memory, all inter-process communication (not only the simple IPC as in a microkernel), the (virtual) file system and the system calls, so only applications run in user-mode. The monolithic kernel is implemented as one pr ...
Module 6: CPU Scheduling
... Assume that 5 processes arrive at the ready queue at the times shown below. The estimated next burst times are also shown. Assume that an interrupt occurs at every arrival time. ...
... Assume that 5 processes arrive at the ready queue at the times shown below. The estimated next burst times are also shown. Assume that an interrupt occurs at every arrival time. ...
Threads - Computer and Information Science | Brooklyn College
... The simplest way is to set up only one process, which processes one user request at a time. Thus if another request arrives over the Internet while the process is still busy processing and not listening, the new request will simply not be received. This blocked model is similar as the early batch-p ...
... The simplest way is to set up only one process, which processes one user request at a time. Thus if another request arrives over the Internet while the process is still busy processing and not listening, the new request will simply not be received. This blocked model is similar as the early batch-p ...
Linux Kernel - Teacher Pages
... Linux uses the same internal representation for processes and threads; a thread is simply a new process that happens to share the same address space as its parent A distinction is only made when a new thread is created by the clone system call fork creates a new process with its own entirely n ...
... Linux uses the same internal representation for processes and threads; a thread is simply a new process that happens to share the same address space as its parent A distinction is only made when a new thread is created by the clone system call fork creates a new process with its own entirely n ...
ppt - Computer and Information Science
... Tanenbaum & Bo, Modern Operating Systems:4th ed., (c) 2013 Prentice-Hall, Inc. All rights reserved. ...
... Tanenbaum & Bo, Modern Operating Systems:4th ed., (c) 2013 Prentice-Hall, Inc. All rights reserved. ...
process threads
... Linux supports kernel-level threads Threads and processes are treated alike except at creation – A thread shares the information about memory management, current directory, open files and signal handlers of its parent process; a process does not share any information of its parent ...
... Linux supports kernel-level threads Threads and processes are treated alike except at creation – A thread shares the information about memory management, current directory, open files and signal handlers of its parent process; a process does not share any information of its parent ...
What is an Operating System?
... n Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing l ...
... n Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing l ...
Operating Systems ECE344 - EECG Toronto
... • Sits between different programs • Sits between different users ...
... • Sits between different programs • Sits between different users ...
Module 7: Process Synchronization
... 3. Bounded Waiting - A bound, or limit must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request to enter its critical section and before that request is granted ...
... 3. Bounded Waiting - A bound, or limit must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request to enter its critical section and before that request is granted ...
Andes Technology PPT Temp
... Backing store – fast disk large enough to accommodate copies of all memory images for all users; must provide direct access to these memory images. Roll out, roll in – swapping variant used for priority-based scheduling algorithms; lower-priority process is swapped out so higher-priority process ...
... Backing store – fast disk large enough to accommodate copies of all memory images for all users; must provide direct access to these memory images. Roll out, roll in – swapping variant used for priority-based scheduling algorithms; lower-priority process is swapped out so higher-priority process ...
threads
... Difficulty: in cases where resources have been allocated to a canceled thread or where a thread is canceled while in the midst of updating data it is sharing with other threads ...
... Difficulty: in cases where resources have been allocated to a canceled thread or where a thread is canceled while in the midst of updating data it is sharing with other threads ...
计算概论 - 北京大学网络所
... proccesor. It has to do with the number of transitotrs which is still doubleing every couple of years. Case in point there is now multiple cores in the same space instead of one core. ...
... proccesor. It has to do with the number of transitotrs which is still doubleing every couple of years. Case in point there is now multiple cores in the same space instead of one core. ...
System and Process Virtualization
... Relating Operating Systems and Virtualization • Operating System isolates Application from Hardware • Operating System is still closely integrated with hardware: device drivers, interrupts, #CPUs, disk layout, etc • Installing OS creates state • Installing Application within OS creates state • Movi ...
... Relating Operating Systems and Virtualization • Operating System isolates Application from Hardware • Operating System is still closely integrated with hardware: device drivers, interrupts, #CPUs, disk layout, etc • Installing OS creates state • Installing Application within OS creates state • Movi ...
CIS 110 ch05
... Manages the CPU Manages memory and storage Manages hardware and peripheral devices • Coordinates application software with the CPU ...
... Manages the CPU Manages memory and storage Manages hardware and peripheral devices • Coordinates application software with the CPU ...