How can I achieve thread affinity in Java?

Java Thread Affinity: Locking Threads to Specific CPU Cores

Achieving thread affinity in Java poses a challenge, as it's not directly supported in the language. However, there are workarounds that involve utilizing Java Native Interface (JNI) to interact with native code.

JNI Approach

To lock threads to specific CPU cores, you can employ a JNI call to native code that performs this task. A few useful resources for this approach are:

• [Using Java JNI to Set Thread Affinity](http://ovatman.blogspot.com/2010/02/using-java-jni-to-set-thread-affinity.html)
• [Thread Affinity in Java](http://blog.toadhead.net/index.php/2011/01/22/cputhread-affinity-in-java/)

Additionally, a custom Java class called ThreadAffinity.java has been developed for this purpose. It utilizes JNA (Java Native Access) and simplifies the process of setting thread affinity.

JNA-Based Library

Another option is to use an external library such as https://github.com/jnr/jnr-posix/wiki/Thread-affinity, which provides a convenient interface for working with thread affinity in Java.

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