Utilizing second processor

[Sud Umm]

Is there a way to improve performance of the java module by utilizing the second processor on a dual processor machine?
To be precise, can I execute two threads and specify exclusively to each one of them which processor (CPU) they should utilize?
How a dual processor machine can be used efficiently to improve the performance of a java application?

[Ernest Friedman-Hill]

There's no way to specify the "CPU affinity" of a thread; but if you create multiple threads on a multiprocessor machine, then a well-implemented JVM will schedule them efficiently on the available processors. I've had dual-CPU Xeons for years now, and find that under both Linux and Windows, multi-threaded CPU-bound programs see an appropriate speedup on multiprocessor machines.

[Mr. C Lamont Gilbert]

Improve java's performance to the detriment of which other program? This kind of thing is handled automatically by the operating system. If two CPUs are available and you have a program that can run concurrently, then the OS will likely make use of both CPUs. But you will not have exclusive or dedicated access.