userspace thread and JVM thread

Rui Wang <[email protected]> Wed, 25 Aug 2004 15:50:26 -0400

Newsgroups	gmane.comp.java.linux.general
Message-ID	<OF7B76A85C.2A2CEE33-ON85256EFB.006C1A9B-85256EFB.006CFD2D@us.ibm.com>

hi All, 

Can anyone tell me the relationship between user space thread ( thread has 
been created by Java application) and JVM thread? How do they map 
together? 

Specially, when trying to measure resouce usage(CPU/Memory) on thread 
basis, how to get user space thread's resource usage? Is there a interface 
I can call from JVM? Or I have to make OS call directly, then how to map 
resource usage to user space thread? 

Many thanks
Rui