Ongoing Optimization

Ongoing Optimization: Relaxed Semantic with CppMem

With the relaxed semantics, we have no synchronizations and ordering constraints on atomic operations.

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Ongoing Optimization: A Data Race with CppMem

But we can improve and further improve the acquire-release semantics of the last post. Why should x be atomic? There is no reason. That was my first but incorrect assumption. See why?

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Ongoing Optimization: Acquire-Release Semantic with CppMem

With the acquire-release semantics, we break the sequential consistency. In the acquire-release semantics, synchronization occurs between atomic operations on the same atomic and not between threads.

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Ongoing Optimization: Sequential Consistency with CppMem

With atomic data types, you can tailor your program to your needs and optimize it. But now we are in the domain of multithreading experts.

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Ongoing Optimization: Locks and Volatile with CppMem

The easiest way to solve the undefined behaviour in the post Ongoing Optimization: Unsynchronized access is, to use a lock.

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Ongoing Optimization: Unsynchronized Access with CppMem

I described my challenge in the last post. Let's 's start with our process of ongoing optimization. To be sure, I verify my reasoning with CppMem. I once made a big mistake in my presentation at Meeting C++ 2014.

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Views: 15928

Ongoing Optimization

Now it's time to put the theory into practice. The job is relatively easy. A small program should undergo ongoing optimization.

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