0
What are the popular multiprocessor thread scheduling strategies?
Wiki User
∙ 11y ago
Load Sharing: Processes are not assigned to a particular processor. A global queue of threads is maintained. Each processor, when idle, selects a thread from this queue.
Gang Scheduling: A set of related threads is scheduled to run on a set of processors at the same time, on a 1-to-1 basis. Closely related threads / processes may be scheduled this way to reduce synchronization blocking, and minimize process switching. Group scheduling predated this strategy.
Dedicated processor assignment: Provides implicit scheduling defined by assignment of threads to processors. For the duration of program execution, each program is allocated a set of processors equal in number to the number of threads in the program. Processors are chosen from the available pool.
Dynamic scheduling: The number of thread in a program can be altered during the course of execution.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What are user level threads?
•No special support needed from the kernel (use any Unix) •Thread creation and context switch are fast (no syscall) •Defines its own thread model and scheduling policies
What is thread in operating system?
A thread is in fact just that, a thread. Something simple. A simple chain of computing that is set up as in 'a row'. A chain of commands that can be useful to the programmers needs. Sometimes the programmers can actually control the flow of events that take place, but most commonly that is up to the programming language to do it for him. Most useful is the 'multichannel' programming threads, that are distributed along different paths to be gathered up in the end. Each thread can then be processed independently of each other in a multiprocessor environment. Therefore these 'threads' can be assembled (sometimes) and put forrward to the user at a higher speed tha otherwise possible.
The system allows developers to use real time threadsIs it necessary to bind a real time thread to an LWP?
Yes. Timing is crucial to real-time applications. If a thread is marked as real-time but is not bound to an LWP, the thread may have to wait to be attached to an LWP before running. Consider if a real-time thread is running (is attached to an LWP) and then proceeds to block (i.e. must perform I/O, has been preempted by a higher-priority real-time thread, is waiting for a mutual exclusion lock, etc.) While the real-time thread is blocked, the LWP itwas attached to has been assigned to another thread. When the real-time thread has been scheduled to run again, it must first wait to be attached to an LWP.Bybindingan LWP to a real- time thread you are ensuring the threadwill be able to runwithminimal delay once it is scheduled.
Who are the characters of the spiders thread?
lord bhudda shakyamuni
What is multi thread operating system?
Basically a thread means a process which CPU is executing at particular time, if you want to run many processes (applications) in the same time, you need to have multithread OS.
What are the multiprocessor thread scheduling strategies?
Load Sharing: Processes are not assigned to a particular processor. A global queue of threads is maintained. Each processor, when idle, selects a thread from this queue.Gang Scheduling: A set of related threads is scheduled to run on a set of processors at the same time, on a 1-to-1 basis. Closely related threads / processes may be scheduled this way to reduce synchronization blocking, and minimize process switching. Group scheduling predated this strategy.Dedicated processor assignment: Provides implicit scheduling defined by assignment of threads to processors. For the duration of program execution, each program is allocated a set of processors equal in number to the number of threads in the program. Processors are chosen from the available pool.Dynamic scheduling: The number of thread in a program can be altered during the course of execution.
What is term that describes to any type of scheduling in which a running thread may involuntarily lose control of the CPU to another thread?
interrupt
What is orphan thread meaning in CPU scheduling?
When a particular thread has many dependent thread, and that particular thread is terminated, then all the threads that depends on that terminated thread will no longer belong to something and they will certainly mislead to their each functions. This is what it call orphan thread.
What are user level threads?
•No special support needed from the kernel (use any Unix) •Thread creation and context switch are fast (no syscall) •Defines its own thread model and scheduling policies
What is CPU scheduling?
The CPU scheduler is the part of the Operating System that determines when to allow each thread to execute. Usually this is done by seeing if all the wait conditions, such as IO wait, timer wait, semaphore wait, etc. have been cleared, and if the thread priority or round-robin turn criteria have been met.
What is difference between thread based and use based strategies for integretion testing in object - oriented methodology?
difference b/w thread based and use based testing
What is the thread count of mattress covers?
The thread count of mattress covers varies depending on which brand and kind of mattress you buy. The most popular thread counts you can find are 300 and 600.
Which CPU scheduling Algorithm is used by Windows XP OS?
In the past (and perhaps currently as well) it has used round-robin, at one time 1 second but since updated to .1 seconds. It may also have other features such as preemptive abilities. Priority fair scheduling.
What is thread in operating system?
A thread is in fact just that, a thread. Something simple. A simple chain of computing that is set up as in 'a row'. A chain of commands that can be useful to the programmers needs. Sometimes the programmers can actually control the flow of events that take place, but most commonly that is up to the programming language to do it for him. Most useful is the 'multichannel' programming threads, that are distributed along different paths to be gathered up in the end. Each thread can then be processed independently of each other in a multiprocessor environment. Therefore these 'threads' can be assembled (sometimes) and put forrward to the user at a higher speed tha otherwise possible.
What is the difference between process and thread in net?
A process is a collection of threads that share the same virtual memory. A process has at least one thread of execution, and a thread always run in a process context. Thread is used to allocate and distribute the CPU work scheduling, many programs a re assigned to different threads and they are most of the time independent of each other. Eg: We can open many instance of MS word and MS Excel in our PC, all are monitored and managed by threads. Process is nothing but a program in execution, many threads can run under a process or many thread can combined under the one thread.
What is the most popular topic on the Community Forum on WikiAnswers?
As of April 7th, 2012, the "Count to a Million!" thread currently contains more than 9070 posts.(Please see the Related link to view the thread.)
Different types of threads in OS?
There are many different thread forms in use today. The most common are; BPV thread API thread profile gauge Thread profile gauge API 5b thread gauges API thread gauges Pipe thread gauges API Thread Gauge Manufacturer & Supplier Ring gauge use Pipe threader Acme thread Feeler gauge set Ring gauge set threaded pipe plug step gauge NPT thread gauge Tapered pipe thread
