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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Entries by Rainer Grimm
Ongoing Optimization: Acquire-Release Semantics 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.
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.
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.
Looking for Proofreaders for my New C++ Book
Something completely different. I’m looking for English proofreaders for my new book.
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.
Ongoing Optimization
Now it’s time to put the theory into practice. The job is relatively easy. A small program should undergo ongoing optimization.
CppMem – An Overview
CppMem is an interactive tool for exploring the behavior of small code snippets of the C++ memory model. No, it should have to be in the toolbox of each programmer who deals seriously with the memory model.
Relaxed Semantics
The relaxed semantics is the end of the scale. The relaxed semantic is the weakest of all memory models and guarantees that the operations on atomic variables are atomic.
Acquire-Release Fences
Acquire and release fences guarantee similar synchronization and ordering constraints as atomics with acquire-release semantics. Similar because the differences are in the details.