Implementing threads and synchronization in Java
Once again, it's time to look inside the JVM. This section covers some of the issues implementing threads and synchronization in a Java runtime. The aim is to provide enough insight and technical background so that the reader will be better equipped to handle parallel constructs and understand how to use synchronization without too much performance loss.
The Java Memory Model
On modern CPU architectures, data caches exist, which is a necessary mechanism for speeding up data access for loads and stores and for reducing contention on the processor bus. As with any cache mechanism, invalidation issues are a problem, especially on multiprocessor systems where we often get the situation that two processors ...
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