Concurrency and Parallelism: Visibility

This lecture by the instructor covers the concepts of visibility in concurrency and parallelism, focusing on memory models, sequential consistency, and the Java memory model. It discusses how synchronized and atomic instructions affect memory writes' visibility, the join method, and the synchronized statement. The lecture also explores shared memory models, modern machine complexities, CPU local buffers, and the cache coherence protocol. It emphasizes the impact of hardware and compiler optimizations on code performance, especially in the presence of concurrency. The importance of understanding memory architecture for performance and the need for clear language memory models in concurrent programming are highlighted.