I have read about std::memory_order in C++ and understood partially. But I still had some doubts around it. Explanation on std::memory_order_acquire says that, no reads or writes in the current th...

Given: std::atomic<uint64_t> x; uint64_t f() { x.store(20, std::memory_order::memory_order_relaxed); x.store(10, std::memory_order::memory_order_relaxed); return x.load(std::memory_order:...

I'm trying to understand exactly how Google's DoNotOptimize() is supposed to work. For completeness, here is its definition (for clang, and non-const data): template <class Tp> inline BENCHMA...

I'm struggling to understand the difference between data dependence and control dependence . So what I saw as an example was : data dependence e.g., instruction uses data created by another instruc...

Below code sample is taken from JLS 17.5 "final Field Semantics": class FinalFieldExample { final int x; int y; static FinalFieldExample f; public FinalFieldExample() { x = 3; y = 4; }...

from http://en.cppreference.com : Relaxed ordering Atomic operations tagged std::memory_order_relaxed are not synchronization operations, they do not order memory. They only guarantee atomicity an...

With Java instruction reordering the execution order of the code is changed by the JVM at compile time or run time, possibly causing unrelated statements to be executed out-of-order. Edit: [Instruc...