Document
... in ready queue or in blocked queue (depending on circumstances) – When an event occurs, all the processes waiting on that event are moved from blocked queue onto ready queue. ...
... in ready queue or in blocked queue (depending on circumstances) – When an event occurs, all the processes waiting on that event are moved from blocked queue onto ready queue. ...
Mutual Exclusion and Synchronization
... – Applicable to any number of processes on a single processor – Processes on multiple processors? • as long as processors share main memory ...
... – Applicable to any number of processes on a single processor – Processes on multiple processors? • as long as processors share main memory ...
CPU Scheduling
... pthread attr t attr; /* get the default attributes */ pthread attr init(&attr); /* set the scheduling algorithm to PROCESS or SYSTEM */ pthread attr setscope(&attr, PTHREAD_SCOPE_SYSTEM); /* set the scheduling policy - FIFO, RT, or OTHER */ pthread attr setschedpolicy(&attr, SCHED_OTHER); /* create ...
... pthread attr t attr; /* get the default attributes */ pthread attr init(&attr); /* set the scheduling algorithm to PROCESS or SYSTEM */ pthread attr setscope(&attr, PTHREAD_SCOPE_SYSTEM); /* set the scheduling policy - FIFO, RT, or OTHER */ pthread attr setschedpolicy(&attr, SCHED_OTHER); /* create ...
2140702
... 7. Write a menu driven shell script which will print the following menu and execute the given task. 8. MENU 9. Display calendar of current month 10. Display today’s date and time 11. Display usernames those are currently logged in the system 12. Display your name at given x, y position 13. Display y ...
... 7. Write a menu driven shell script which will print the following menu and execute the given task. 8. MENU 9. Display calendar of current month 10. Display today’s date and time 11. Display usernames those are currently logged in the system 12. Display your name at given x, y position 13. Display y ...
Lecture 01 Introduction
... Symmetric multiprocessing (SMP) • Systems with multiple multiprocessors – there are multiple processors – these processors share same main memory and I/O facilities – All processors can perform the same functions ...
... Symmetric multiprocessing (SMP) • Systems with multiple multiprocessors – there are multiple processors – these processors share same main memory and I/O facilities – All processors can perform the same functions ...
MS-DOS-&-PC-DOS-by-Lindsey-Buranych-Alan-Crouch
... • Another limitation of DOS was the lack of a graphical user interface. The desire for an interactive, graphical interface (influenced by the Apple Macintosh). – Several programs running under MS-DOS introduced their own graphical interfaces, however, this did not provide much consistency. “Non-Micr ...
... • Another limitation of DOS was the lack of a graphical user interface. The desire for an interactive, graphical interface (influenced by the Apple Macintosh). – Several programs running under MS-DOS introduced their own graphical interfaces, however, this did not provide much consistency. “Non-Micr ...
Allowable Process States - Universitas Pendidikan Indonesia
... • Another limitation of DOS was the lack of a graphical user interface. The desire for an interactive, graphical interface (influenced by the Apple Macintosh). – Several programs running under MS-DOS introduced their own graphical interfaces, however, this did not provide much consistency. “Non-Micr ...
... • Another limitation of DOS was the lack of a graphical user interface. The desire for an interactive, graphical interface (influenced by the Apple Macintosh). – Several programs running under MS-DOS introduced their own graphical interfaces, however, this did not provide much consistency. “Non-Micr ...
ch01-Introduction
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
Chapter 1: Introduction
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
Chapter 4: Protection in a General
... approach, programs are broken into logical segments, each representing a section of code to which one might assign specific access rights. Some of the segments we see in a modern program include program segment, data segment, and stack segment. In the pure segment approach, each segment is loaded in ...
... approach, programs are broken into logical segments, each representing a section of code to which one might assign specific access rights. Some of the segments we see in a modern program include program segment, data segment, and stack segment. In the pure segment approach, each segment is loaded in ...
A user-mode port of the Linux kernel
... A basic design decision is that this port will directly run the host's unmodi ed user space. If processes are going to run exactly the same way in a virtual machine as in the host, then their system calls need to be intercepted and executed in the virtual kernel. This is because those processes are ...
... A basic design decision is that this port will directly run the host's unmodi ed user space. If processes are going to run exactly the same way in a virtual machine as in the host, then their system calls need to be intercepted and executed in the virtual kernel. This is because those processes are ...
Scheduling Techniques for Operating Systems
... running time and bases the job's priority on this information. Each time a job is completed, its virtual processor is allocated to the waiting job having the smallest ...
... running time and bases the job's priority on this information. Each time a job is completed, its virtual processor is allocated to the waiting job having the smallest ...
Figure 15.1 A distributed multimedia system
... – LRPC [Bershad et. al. 1990], described on pp. 237-9).. ...
... – LRPC [Bershad et. al. 1990], described on pp. 237-9).. ...
Figure 15.1 A distributed multimedia system
... – LRPC [Bershad et. al. 1990], described on pp. 237-9).. ...
... – LRPC [Bershad et. al. 1990], described on pp. 237-9).. ...
pcs 105 advanced operating system
... Multiprocessor and Database Operating Systems: Structures, Design Issues, Threads, Process Synchronization, Processor Scheduling, Memory Management, Reliability / Fault Tolerance; Database Operating Systems, Introduction, Concurrency Control, Distributed Database Systems, Concurrency Control Algorit ...
... Multiprocessor and Database Operating Systems: Structures, Design Issues, Threads, Process Synchronization, Processor Scheduling, Memory Management, Reliability / Fault Tolerance; Database Operating Systems, Introduction, Concurrency Control, Distributed Database Systems, Concurrency Control Algorit ...
ppt
... (b) is the most commonly used - matches the TCP connection model (c) is used where the service is encapsulated as an object. E.g. could have multiple shared whiteboards with one thread each. Each object has only one thread, avoiding the need for thread synchronization within objects. ...
... (b) is the most commonly used - matches the TCP connection model (c) is used where the service is encapsulated as an object. E.g. could have multiple shared whiteboards with one thread each. Each object has only one thread, avoiding the need for thread synchronization within objects. ...
Course Introduction - Washington University in St. Louis
... 1. Good intuition about OS operation and design principles ...
... 1. Good intuition about OS operation and design principles ...
Operating System Support for MP & DSM Based Communication
... no trial to develop a comprehensive operating system to support parallel processing on clusters The solutions are performance driven – little work has been done on making them programmer friendly Problems from parallel processing point of view: – Processes are created one at a time although primitiv ...
... no trial to develop a comprehensive operating system to support parallel processing on clusters The solutions are performance driven – little work has been done on making them programmer friendly Problems from parallel processing point of view: – Processes are created one at a time although primitiv ...
Chapter 2 - Processes
... Hence, readers get read locks and writers get write locks. Read locks are compatible with read locks, but not write locks Write locks are not compatible with read or write locks. Policy issues surround when readers can enter and who gets in next when a writer leaves. ...
... Hence, readers get read locks and writers get write locks. Read locks are compatible with read locks, but not write locks Write locks are not compatible with read or write locks. Policy issues surround when readers can enter and who gets in next when a writer leaves. ...
Critical Section
... Progress: If no process is executing in its critical section and some processes wish to enter their critical sections, then only those processes that are not executing in their remainder sections can decide which process will enter its critical section next, and this ...
... Progress: If no process is executing in its critical section and some processes wish to enter their critical sections, then only those processes that are not executing in their remainder sections can decide which process will enter its critical section next, and this ...
CHAPTER 1 Concepts and Tools n this chapter, we`ll introduce the
... History of the Win32 API Interestingly, Win32 wasn’t slated to be the original programming interface to what was then called Windows NT. Because the Windows NT project started as a replacement for OS/2 version 2, the primary programming interface was the 32-bit OS/2 Presentation Manager API. A year ...
... History of the Win32 API Interestingly, Win32 wasn’t slated to be the original programming interface to what was then called Windows NT. Because the Windows NT project started as a replacement for OS/2 version 2, the primary programming interface was the 32-bit OS/2 Presentation Manager API. A year ...
OPERATING SYSTEMS:
... Off Line Processing; not only are IO and CPU happening concurrently, but some off-board processing is occurring with the IO. The CPU is wasted if a job waits for I/O. This leads to: ...
... Off Line Processing; not only are IO and CPU happening concurrently, but some off-board processing is occurring with the IO. The CPU is wasted if a job waits for I/O. This leads to: ...
1.01
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
CSCI 4534
... http://courses.cs.vt.edu/~csonline/OS/Lessons/Processes/Lesson.html Read pp. 279 and 280 Write down 5-8 steps to interrupt See paragraph #5 … CPUs store different things Where is the information stored? o CPU registers? o Stack: current stack which could be a user’s stack? Kernel stack? Three ways ...
... http://courses.cs.vt.edu/~csonline/OS/Lessons/Processes/Lesson.html Read pp. 279 and 280 Write down 5-8 steps to interrupt See paragraph #5 … CPUs store different things Where is the information stored? o CPU registers? o Stack: current stack which could be a user’s stack? Kernel stack? Three ways ...