Does anybody know of a way to lock down individual threads within a Java process to specific CPU cores (on Linux)? I've done this in C, but can't find how to do this in Java. My instincts are that this will require a JNI call, but I was hoping someone here might have some insight or might have done it before.
Thanks!
IMO, this will not be possible unless you use native calls. JVM is supposed to be platform independent, any system calls done to achieve this will not result in a portable code.
It's not possible (at least with plain Java).
You can use thread pools to limit the amount of threads (and therefore cores) used for different types of work, but there is no way to specify a core to use.
There is even the (small) possibility that your Java runtime doesn't support native threading for your OS or hardware. In this case, green threads are used and only one core will be used for the whole JVM.
