Priority inversion occurs when a high priority job is executed with lower amount of resources than a low priority job. Thus the expected priority is "inverted."
Priority Inversion is an occurrence where a higher priority process is unable to get a lock because a low priority process is holding the lock.
The condition in which a high-priority thread is kept from running by a low-priority thread. For example, priority inversion occurs when a low-priority thread is executing inside of a critical section and a high-priority thread is waiting to enter the critical section. If a medium-priority thread preempts the low-priority thread (while still inside of the critical section), the result is unbounded priority inversion--the low- and medium-priority threads can indefinitely prevent the high-priority thread from running.
A phenomenon by which a higher-priority thread waiting for a lock held by a lower-priority thread has its execution delayed by other threads whose priority exceeds the priority of the thread holding the lock but is less than the lock-waiting thread's priority.
The mechanism that allows low-priority threads to run and complete execution rather than being preempted and locking up a resource such as an I/O device.
Priority inversion occurs when the interaction among three or more kernel threads blocks the highest-priority kernel thread from executing. For example, a high-priority kernel thread waits for a resource locked by a low-priority kernel thread, and the low-priority kernel thread waits while a middle-priority kernel thread executes. The high-priority kernel thread is made to wait while a kernel thread of lower priority (the middle-priority kernel thread) executes.
A condition that can occur when a low-priority thread consumes CPU at a higher priority than it should. This can be caused by not supporting priority inheritance, such that when the lower-priority thread sends a message to a higher-priority thread, the higher-priority thread consumes CPU on behalf of the lower-priority thread. This is solved by having the higher-priority thread inherit the priority of the thread on whose behalf it's working.
A situation where a lower-priority process blocks the execution of a higher-priority process.
An unwanted software situation in which a high-priority task is delayed while waiting for access to a shared resource that is not even being used at the time. For all practical purposes, the priority of this task has been lowered during the delay period.
The effect that occurs when a low-priority process holds a lock that a process of higher priority needs. The lower priority process runs and the higher priority process waits, inverting the intended priorities. See priority inheritance.
Occurs when interaction among three or more threads blocks the highest-priority thread from executing until after the lowest- priority thread can execute.
In scheduling, priority inversion is the scenario where a low priority task holds a shared resource that is required by a high priority task. This causes the execution of the high priority task to be blocked until the low priority task has released the resource, effectively "inverting" the relative priorities of the two tasks. If some other medium priority task, that does not depend on the shared resource, attempts to run in the interim, it will take precedence over both the low priority task and the high priority task.
