Is pthreads doing busy waiting internally?

Busy-waiting, busy-looping or spinning is a technique in which a process repeatedly checks to see if a condition is true, such as whether keyboard input or a ...

The while loop is an example of busy-waiting. In busy-waiting, a thread repeat-edly tests a condition, but, effectively, does no useful work ...

You have busy waiting when one thread, waits for a result from another thread and you use and NOOP/empty loop to wait for that result.

Short answer: no. (You can easily detect busy-waiting because the CPU utilization will be at or near 100% when the program isn't doing anything.)

I recently compiled one of my multi-threaded code using busywaiting and it works significantly faster. However, I am not certain i understand how this helps.

I'm looking for ways to make it so that the threads go to sleep and wake up only when they are required rather than polling continuously.

Busy-waiting enforces the order in which threads access a critical section. Using mutexes, the order is left to chance and the system. There are applications ...

A wait at a barrier causes a thread to wait until all threads have performed a wait at the barrier. • At that point, they all proceed. • Use instead of ...

Busy-waiting enforces the order threads access a critical section. • Using mutexes, the order is left to chance and the system. • There are applications where ...

在軟體工程中，忙碌等待（也稱自旋；英語：Busy waiting、busy-looping、spinning）是一種以行程反覆檢查一個條件是否為真為根本的技術，條件可能為鍵盤輸入或某個鎖是否可用。