From owner-freebsd-java  Wed Mar 17  9:39:28 1999
Delivered-To: freebsd-java@freebsd.org
Received: from vip.consys.com (VIP.ConSys.COM [209.141.107.6])
	by hub.freebsd.org (Postfix) with ESMTP id 7AE34152F6
	for <freebsd-java@FreeBSD.ORG>; Wed, 17 Mar 1999 09:39:24 -0800 (PST)
	(envelope-from rcarter@pinyon.org)
Received: (from pinyon@localhost)
	by vip.consys.com (8.9.3/8.9.1) id KAA37133;
	Wed, 17 Mar 1999 10:38:42 -0700 (MST)
Date: Wed, 17 Mar 1999 10:38:42 -0700 (MST)
From: "Russell L. Carter" <rcarter@pinyon.org>
Message-Id: <199903171738.KAA37133@vip.consys.com>
To: hasty@rah.star-gate.com, nate@mt.sri.com
Subject: Re: Native thread on JDK 1.1.7
Cc: F.Risso@cs.ucl.ac.uk, freebsd-java@FreeBSD.ORG
In-Reply-To: <199903171712.KAA10340@mt.sri.com>
Sender: owner-freebsd-java@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

|> We do support kernel threads and they are virtually the same as the linux 
|> threads.
|
|Not quite.  We support *LINUX* threads in emulation mode with a GPL
|add-on package, but we don't have native kernel threads in a form usable
|by native FreeBSD software.

It is a GPL'd port but it sure as hell works just fine for native
FreeBSD software.  I have made *enormous* progress with ACE/TAO
using LinuxThreads.

And if the app needs anything resembling "modern" threads, it is 
the only way to go.
  
|
|(And I don't consider using the GPL code a requirement to use the JDK
|'usable'.)

That's another matter entirely.  I'd rather it wasn't either.  On
the other hand, I'm getting paid to make things work that require
the functionality that is *only* in LinuxThreads.

|
|Besides, using green threads almost always outperforms native threads on
|single processor boxes, even on server's with the existing green-threads
|implemention.  (This has been my experience on both FreeBSD and Solaris,
|although I can't give you any benchmark numbers to prove it since my
|application is not a benchmark.)

Well, getting benchmark numbers is exactly what I'm working on this
week.

|
|Also, it appears that getting kernel threads and a JIT working is
|difficult, as noted by the Linux JDK2 port.
|
|IMO, native threads is over-rated for most applications.
|

IMO, the LinuxThreads port is the *only* option for most
(modern) applications. :-)

Cheers,
Russell

|
|
|Nate


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-java" in the body of the message