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Lecture Operating systems: Lesson 45 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 45 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: space allocation techniques, free space management, disk structure and scheduling, access time and disk bandwidth, disk scheduling algorithms (FCFS, SSTF, Scan, C-Scan, Look, C-Look), course recap, future directions,...

4/8/2023 6:57:39 AM +00:00

Lecture Operating systems: Lesson 44 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 44 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: file sharing, file protection, in-memory data structures, space allocation techniques, contiguous, linked, index, UNIX allocation, UNIX protection, file allocation table (FAT),...

4/8/2023 6:57:33 AM +00:00

Lecture Operating systems: Lesson 43 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 43 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: directory structures, links in UNIX/Linux, file system mounting, file sharing, file protection, acyclic-graph directories, soft (symbolic) links, mounting in UNIX,...

4/8/2023 6:57:26 AM +00:00

Lecture Operating systems: Lesson 42 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 42 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: file structure, file concept, file types, file operations, access methods, directories, directory operations, directory structure, contiguous logical address space, directory entry,...

4/8/2023 6:57:20 AM +00:00

Lecture Operating systems: Lesson 41 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 41 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: allocation of frames, thrashing, the working set model, page fault frequency model, other considerations, prepaging, page size, program structure and examples,...

4/8/2023 6:57:13 AM +00:00

Lecture Operating systems: Lesson 40 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 40 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: belady’s anomaly, page replacement algorithms, least frequently used (LFU), most frequently used (MFU), page buffering algorithm, allocation of frames, minimum number of frames, thrashing,...

4/8/2023 6:57:07 AM +00:00

Lecture Operating systems: Lesson 39 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 39 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: page replacement, page replacement algorithms, first-in-first-out (FIFO), optimal replacement, least recently used (LRU), belady’s anomaly, stack replacement algorithms,...

4/8/2023 6:57:00 AM +00:00

Lecture Operating systems: Lesson 38 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 38 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: performance of demand paging, process creation, memory mapped files, Intel 80386 example, servicing a page fault, block/string move, performance of demand paging, effective access time (EAT),...

4/8/2023 6:56:54 AM +00:00

Lecture Operating systems: Lesson 37 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 37 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: paged segmentation, memory management in Intel 80386, virtual memory, demand paging, page fault, performance of demand paging, process creation, higher degree of multiprogramming,...

4/8/2023 6:56:48 AM +00:00

Lecture Operating systems: Lesson 36 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 36 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: paged segmentation, examples of paged segmentation: MULTICS under GE 345 and OS/2, Windows, and Linux under Intel CPUs, paged segmentation with two-level paging,...

4/8/2023 6:56:41 AM +00:00

Lecture Operating systems: Lesson 35 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 35 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: sharing in paging, segmentation, logical to physical address translation, hardware support needed, protection and sharing, reentrant (read-only) code pages of a process address space can be shared,...

4/8/2023 6:56:31 AM +00:00

Lecture Operating systems: Lesson 34 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 34 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: protection in paging, structure of the page table: multi-level paging, hashed page tables, inverted page table, sharing in paging, structure of the page table, multilevel paging,...

4/8/2023 6:56:24 AM +00:00

Lecture Operating systems: Lesson 33 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 33 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: addressing and logical to physical address translation, examples of intel P4 and PDP-11, page table implementation, performance of paging, protection in paging,...

4/8/2023 6:56:17 AM +00:00

Lecture Operating systems: Lesson 32 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 32 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: multiprogramming with variable tasks (MVT), external fragmentation, paging and addressing in paging, addressing and logical to physical address translation, page table implementation,...

4/8/2023 6:56:11 AM +00:00

Lecture Operating systems: Lesson 31 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 31 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: dynamic linking, overlays, swapping, swap out and swap in, contiguous storage allocation, MFT and MVT, quantum for RR scheduler, pending I/O for swapped out process,...

4/8/2023 6:56:05 AM +00:00

Lecture Operating systems: Lesson 30 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 30 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: what is memory management, source code to execution, address binding, logical and physical address spaces, dynamic loading, dynamic linking, and overlays,...

4/8/2023 6:55:59 AM +00:00

Lecture Operating systems: Lesson 29 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 29 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: deadlock detection: resources with single and multiple instances, recovery from deadlocks, process termination, resource preemption, single instance of each resource type,...

4/8/2023 6:55:52 AM +00:00

Lecture Operating systems: Lesson 28 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 28 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: deadlock avoidance, RAG for deadlock avoidance, banker’s algorithms, safety algorithm, safe sequence, RAG algorithm, claim edge converts to request edge when a process requests a resource,...

4/8/2023 6:55:46 AM +00:00

Lecture Operating systems: Lesson 27 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 27 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: deadlock handling, deadlock prevention, deadlock avoidance, safe state, safe sequence, the behavior of processes, safe, unsafe, and deadlock states,...

4/8/2023 6:55:39 AM +00:00

Lecture Operating systems: Lesson 26 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 26 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: monitors—dining philosophers, the deadlock problem, deadlock characterization, deadlock handling, deadlock prevention, bridge crossing example, system model, resource allocation graph,...

4/8/2023 6:55:33 AM +00:00

Lecture Operating systems: Lesson 25 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 25 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: dining philosophers problem, high-level synchronization constructs, critical region, monitor, possibility of deadlock, the region statement, monitors with condition variables,...

4/8/2023 6:55:26 AM +00:00

Lecture Operating systems: Lesson 24 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 24 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: types of semaphores, counting semaphores, classical synchronization problems, bounded buffer problem, readers and writers problem, dining philosophers problem,...

4/8/2023 6:55:19 AM +00:00

Lecture Operating systems: Lesson 23 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 23 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: busy waiting, new definition of semaphore, process synchronization, deadlock and starvation, binary and counting semaphores, semaphore implementation, problems with semaphores,...

4/8/2023 6:55:13 AM +00:00

Lecture Operating systems: Lesson 22 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 22 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: semaphores based solutions for the critical section problem, deadlock and starvation, binary and counting semaphores, synchronization tool, n-processes critical section problem,...

4/8/2023 6:55:07 AM +00:00

Lecture Operating systems: Lesson 21 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 21 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: 2-process critical section problem solution, N-process critical section problem, the bakery algorithm, hardware solutions, synchronization hardware, solutions based on the TSL and swap instructions,...

4/8/2023 6:55:01 AM +00:00

Lecture Operating systems: Lesson 20 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 20 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: 2-process critical section problem (continued), n-process critical section problem, the bakery algorithm, data structures, design a protocol to serialize executions of critical sections,...

4/8/2023 6:54:54 AM +00:00

Lecture Operating systems: Lesson 19 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 19 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: process synchronization, the critical section problem, conditions for a good solution, 2-process critical section problem solutions, bounded-buffer problem, race condition, bank transactions,...

4/8/2023 6:54:48 AM +00:00

Lecture Operating systems: Lesson 18 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 18 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: UNIX System V scheduling and UNIX system V scheduling algorithm, algorithm evaluation, process synchronization, round robin scheduling and process priorities,...

4/8/2023 6:54:36 AM +00:00

Lecture Operating systems: Lesson 17 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 17 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: multilevel queues and multilevel-feedback-queue scheduler, multi-level queues scheduling, multi-level feedback queues scheduling, UNIX System V scheduling, algorithm evaluation,...

4/8/2023 6:54:30 AM +00:00

Lecture Operating systems: Lesson 16 - Dr. Syed Mansoor Sarwar

Lecture Operating systems: Lesson 16 - Dr. Syed Mansoor Sarwar. The main topics covered in this lesson include: SJF is optimal, round-Robin scheduling, multi-level queues scheduling, multi-level feedback queues scheduling, quantum vs context switch, turnaround time vs quantum,...

4/8/2023 6:54:23 AM +00:00