silikonxtra.blogg.se - Java timeslice windows

#JAVA TIMESLICE WINDOWS FULL#
#JAVA TIMESLICE WINDOWS WINDOWS#

This is useful when the current thread has finished its work for now but wants to quickly return to the front of the queue and check whether some condition has changed. I'll give an example from my experience.Īs we know, yield forces the calling thread to give up the processor that it's running on so that another thread can be scheduled to run. I see the question has been reactivated with a bounty, now asking what the practical uses for yield are. That a task is complete, or ideally by using one of the Java 5Ĭoncurrency constructs such as a Semaphore or blocking queue. The wait/notify mechanism to allow one thread to signal to another Such as by using join() to wait for another thread to complete, using

if you're waiting for a process or resource to complete or become available, there are more efficient ways to accomplish this,.

Has used in its last chunk of processing, then sleeping for someĪmount of time to compensate: see the sleep() method

if you're trying to use only a portion of the CPU, you can do this in a more controllable way by estimating how much CPU the thread.

Its behaviour isn't standardly definedĪnd there are generally better ways to perform the tasks that you (See the section on thread scheduling for more details on prioritiesĪnd scheduling algorithms.) When to use yield()? Yielded could be given more CPU when scheduled in the future. On its recent CPU allocation- thus, implicitly, a thread that has

(at least in kernel 2.6.8 onwards), the fact that the thread has yielded is implicitly taken into account by the scheduler's heuristics.

a yielded thread will not get another slice of CPU until all other threads have had a slice of CPU.

This call are a little different, and possibly more severe than under Under Linux, Hotspot simply calls sched_yield(). (See the section on thread scheduling for more Threads, the yielding thread can be scheduled back in one interrupt This means that depending on the priorities of other Makes the current thread give up its current timeslice, but not itsĮntire quantum.

#JAVA TIMESLICE WINDOWS WINDOWS#

Thread.yield() using the Windows SwitchToThread() API call. Generally loses 1 quantum value (in effect, 1/3 of a 10 or 15ms tick). Little different from a non-zero sleep where the sleeping thread Remaining quantum from the time of yielding.

#JAVA TIMESLICE WINDOWS FULL#

With a full full quantum, but doesn't "carry over" any of the When it is eventually re-scheduled, it will come back Priority) will get a chance to run before the yielded thread is next Words, all runnable threads of the same priority (and those of greater Putting it to the end of the queue for its priority level. Has the special effect of clearing the current thread's quantum and In Java 5, Thread.yield() calls the Windows API call Sleep(0). In the Hotspot implementation, the way that Thread.yield() works has