What are the performance benchmarks for stdatomic operations?

What are the performance benchmarks for stdatomic operations?

The performance of stdatomic operations can vary based on the hardware and the specific operations being performed. Generally, atomic operations are designed to be efficient, but they can be slower than non-atomic operations due to the necessary memory barriers and potential cache coherence overhead.

Can you provide some specific benchmarks or comparisons?

Sure! For example, on x86 architectures, a simple atomic increment might take around 10-20 cycles, while a non-atomic increment could be as fast as 1-2 cycles. However, this can change based on contention and the specific use case.

How do these benchmarks compare to lock-based synchronization?

Atomic operations are generally faster than lock-based synchronization in low-contention scenarios. Locks can introduce significant overhead due to context switching and potential deadlocks, while atomic operations can be more lightweight.

Are there any tools to measure these performance metrics?

Yes, tools like Google Benchmark, Intel VTune, and Valgrind can help measure the performance of atomic operations and provide insights into their efficiency.