Very Computer

I'm using the Sun JDK (1.2.2) in two environments. Both environments
run at the same time, on the same system (Dell Latitude, p3-450, 512
mRam.)

The primary environment is RH 6.1 (2.2.14) kernel with XIG commercial X
drivers.  The second is NT4SP5 running in a virtual machine (VMWARE 2)
under linux. So it is sharing the memory, processor, X drivers, etc..
as a task under linux.

The curious thing is that the performance of java (running apps) is
significantly better in the Virtual NT session, than it is native to
linux. The obvious conclusion here is that the JDK for NT is more
efficient than the linux release.

My question is whether or not the difference is HotSpot? Does the
latest NT release have it. I know that the linux release does not.

Thanks
John

--
John R. Harlow
United Systems Inc.

Sent via Deja.com http://www.deja.com/
Before you buy.

The Sun JDK for Linux doesn't use native threads or JIT.  Get the
latest Blackdown release and the Borland/Inprise JIT for much
better performance.

--
Mark Hamstra
Bentley Systems, Inc.

Quote:>I'm using the Sun JDK (1.2.2) in two environments. Both environments
>run at the same time, on the same system (Dell Latitude, p3-450, 512
>mRam.)

>The primary environment is RH 6.1 (2.2.14) kernel with XIG commercial X
>drivers.  The second is NT4SP5 running in a virtual machine (VMWARE 2)
>under linux. So it is sharing the memory, processor, X drivers, etc..
>as a task under linux.

>The curious thing is that the performance of java (running apps) is
>significantly better in the Virtual NT session, than it is native to
>linux. The obvious conclusion here is that the JDK for NT is more
>efficient than the linux release.

>My question is whether or not the difference is HotSpot? Does the
>latest NT release have it. I know that the linux release does not.

I believe the NT VM has HotSpot, but a more important point is that
the current Linux JDK doesn't even ship with a JIT.  You can get one
from www.inprise.com.

HotSpot is coming in the Linux 1.3 release (due pretty soon I think),
and IBM is supposed to ship a 1.3 VM by 2Q.

HTH,

Terry
--

Thanks for the advice. Based on this response (and another pointing out
the green-threads issue in Sun JDK vs Blackdown) I was able to
significantly improve performance. I haven't benchmarked it yet, but
it 'feels' almost as fast as the HotSpot version running in VMware NT
session.

Once Linux gets HotSpot, it should really cook.

John

--
John R. Harlow
United Systems Inc.

Sent via Deja.com http://www.deja.com/
Before you buy.

-- snip --

Quote:>HotSpot is coming in the Linux 1.3 release (due pretty soon I think),
>and IBM is supposed to ship a 1.3 VM by 2Q.

Any word on whether this will be a free offering or will it be placed on
Software Choice as a commercial product?

--

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As I understand it, both will be zero cost.

Terry
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