Are lock-free queues faster?

Conclusions. Lock-Free queues provides us better performance for concurrent queue which is non-blocking and linearizable.

What is wait free queue?

A wait-free queue requires that every thread makes guaranteed progress (after a finite number of steps). In other words, the while loops in our add and get methods must succeed after a certain number of steps. In order to achieve that, we assign a helper thread to every thread.

What are lock-free data structures?

A lock-free data structure can be used to improve performance. A lock-free data structure increases the amount of time spent in parallel execution rather than serial execution, improving performance on a multi-core processor, because access to the shared data structure does not need to be serialized to stay coherent.

What is SPSC queue?

SPSC queues can be classified in two main families: bounded and unbounded. Bounded SPSC queues, typically implemented on top of a circular buffer, are used to limit memory usage and avoid the overhead of dynamic memory alloca- tion.

How do you solve ABA problems?

The root solution to ABA problem is that we should defer reclamation while other threads are holding the node or we should have a way to identify the difference between the old node and the new node.

What is non blocking queue in Java?

Unlike a LinkedBlockingQueue, a ConcurrentLinkedQueue is a non-blocking queue. Thus, it does not block a thread once the queue is empty. Instead, it returns null. Since its unbounded, it’ll throw a java.

What is lock-free in Java?

In a multi-threaded environment, the lock-free algorithms provide a way in which threads can access the shared resources without the complexity of Locks and without blocking the threads forever. These algorithms become a programmer’s choice as they provide higher throughput and prevent deadlocks.

Is ConcurrentLinkedQueue thread-safe?

Class ConcurrentLinkedQueue An unbounded thread-safe queue based on linked nodes. This queue orders elements FIFO (first-in-first-out). The head of the queue is that element that has been on the queue the longest time.

What is the difference between lock-free and wait-free?

A method is lock-free if it guarantees that infinitely often some method call finishes in a finite number of steps. A method is wait-free if it guarantees that every call finishes its execution in a finite number of steps.

Is STD atomic lock-free?

std::atomic::is_lock_free Checks whether the atomic operations on all objects of this type are lock-free.

What is ABA in computer?

Application Programming Interface. Technology, Computing, Technical.

Why do we use BlockingQueue?

BlockingQueue is a java Queue that support operations that wait for the queue to become non-empty when retrieving and removing an element, and wait for space to become available in the queue when adding an element.