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Aug 14, 20265 min read228 views

Volatile vs. AtomicReference vs. Synchronized: A Flash Sale Case Study

Following up on how hardware caches and store buffers break multithreaded code, let’s explore the three standard concurrency tools in Java - volatile, AtomicReference, and synchronized using a real-world scenario.

#java #concurrency

Aug 12, 20263 min read280 views

What Actually Happens Inside Your CPU When Two Java Threads Share a Variable

Running multithreaded software in modern multi-core processor is a physical coordination challenge between the CPU cores, local caches (L1, L2 and L3) and main memory(RAM). Here is what happens inside the machine when threads executes simultaneously.

#java #concurrency #multithreading #cpu