multithreading - How Java multi-threaded program is able to use multiple CPU cores? -

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could please provide explanation how java multi-threaded program (e.g. tomcat servlet container) able use cores of cpu when jvm single process on linux? there in-depth article describes subject in details?

edit #1: i'm not looking advice how implement multi-threaded program in java. i'm looking explanation of how jvm internally manages use multiple cores on linux/windows while still being single process on os.

edit #2: best explanation managed find hotspot (sun/oracle jvm) implements threads native threads on linux using nptl. more less each thread in java lightweight process (native thread) on linux. visible using ps -elf command print outs not process id (ppid) native thread id (lwp).

more details can found here:

edit #3: wikipedia has short nice entry on nptl further references http://en.wikipedia.org/wiki/native_posix_thread_library

the linux kernel supports threads first-class citizens. in fact kernel thread isn't different process, except shares address space thread/process.

some old versions of ps showed separate process each thread default , newer versions can enable behavior using -m flag.


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