From owner-freebsd-java Tue Apr 9 10: 8:16 2002 Delivered-To: freebsd-java@freebsd.org Received: from ns.yogotech.com (ns.yogotech.com [206.127.123.66]) by hub.freebsd.org (Postfix) with ESMTP id 911B037B419 for ; Tue, 9 Apr 2002 10:08:11 -0700 (PDT) Received: from caddis.yogotech.com (yogotech.nokia.com [4.22.66.156]) by ns.yogotech.com (8.9.3/8.9.3) with ESMTP id LAA23029; Tue, 9 Apr 2002 11:08:05 -0600 (MDT) (envelope-from nate@yogotech.com) Received: (from nate@localhost) by caddis.yogotech.com (8.11.6/8.11.6) id g39H84e04550; Tue, 9 Apr 2002 11:08:04 -0600 (MDT) (envelope-from nate) From: Nate Williams MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15539.8180.83389.796121@caddis.yogotech.com> Date: Tue, 9 Apr 2002 11:08:04 -0600 To: Daniel Eischen Cc: Nate Williams , Herve Quiroz , freebsd-java@FreeBSD.ORG Subject: Re: FreeBSD 5.0 Developer Preview #1 Now Available In-Reply-To: References: <15539.4987.918286.268041@caddis.yogotech.com> X-Mailer: VM 6.96 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid Reply-To: nate@yogotech.com (Nate Williams) Sender: owner-freebsd-java@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org > > > > A Developer Preview release of FreeBSD 5.0-CURRENT is now available > > > > for widespread testing. This preview is a significant milestone > > > > towards the eventual release of FreeBSD 5.0 in late 2002. Some of the > > > > many new features that are available in this snapshot are listed > > > > below: > > > > > > > > * SMP support has been largely reworked, incorporating code from > > > > BSD/OS 5.0 (in progress). > > > > > > [...] > > > > > > > * An implementation of scheduler activations has been added to > > > > the kernel to more efficiently handle multi-threaded > > > > programs. (in progress). > > > > > > > > > Has anyone tried the native jdk 1.3 under this 5.0-current and noticed > > > significant improvements ? > > > > I would be suprised it it worked at all, given all the kernel changes in > > 5.0. > > > > > Note: I am single-CPUed anyway but maybe the new scheduler makes wonders > > > (hope)... > > > > Nope, because the scheduler activations aren't (yet) made available to > > userland processes like the JDK. When that happens (it'll be a while), > > then the JDK will have to be re-tooled to take advantage of the new > > threading model. > > If it uses pthreads, it shouldn't need to be retooled, except perhaps > for any MD Java thread context manipulations. SA (or KSEs) shouldn't > normally be used directly except within the threads library itself. My suspicion is that we're going to have to do some re-tooling for the thread context manipulations for things like the Garbage Collector and such. They may be fairly minor, but since they are non-portable, they'll need to be tweaked for the new thread library. Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-java" in the body of the message