Determining the JVM Threading Model used on Windows

Thread view:

Kevin Erickson - 27 Feb 2007 17:50 GMT

Hello,

Is there a way to determine the JVM Threading Model used on Windows?
Any assistance in determining this would be of great benefit.

Thanks!

Reply to this Message

Chris Uppal - 27 Feb 2007 18:38 GMT

Kevin Erickson wrote:

> Is there a way to determine the JVM Threading Model used on Windows?

I believe that all Sun JVMs for Windows (since at least JDK 1.3) have used a
1-to-1 model, i.e. 1 OS-thread for each Java thread.

Other vendors' JVMs will probably be different (I'm pretty sure the BEA
"JRockit" JVM has green threads even on Windows).

I don't know of any defined way to find out how Java threads are mapped to OS
threads from Java code. I suspect that it would come down to checking system
properties like java.vendor, and then looking for vendor-specific properties.

-- chris

Reply to this Message

Mike Schilling - 27 Feb 2007 23:44 GMT

> Kevin Erickson wrote:
>
[quoted text clipped - 10 lines]
> down to checking system properties like java.vendor, and then looking
> for vendor-specific properties.

As a gross estimate, at least, you can run Java programs that create various
numbers of threads and use the task manager to see how many OS threads were
created..

Reply to this Message

Determining the JVM Threading Model used on Windows

Free Magazines