From owner-freebsd-current Tue Oct 29 13:33: 3 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B648637B401 for ; Tue, 29 Oct 2002 13:33:01 -0800 (PST) Received: from flamingo.mail.pas.earthlink.net (flamingo.mail.pas.earthlink.net [207.217.120.232]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4F87E43E4A for ; Tue, 29 Oct 2002 13:33:01 -0800 (PST) (envelope-from tlambert2@mindspring.com) Received: from pool0057.cvx22-bradley.dialup.earthlink.net ([209.179.198.57] helo=mindspring.com) by flamingo.mail.pas.earthlink.net with esmtp (Exim 3.33 #1) id 186dyZ-0006My-00; Tue, 29 Oct 2002 13:32:39 -0800 Message-ID: <3DBEFE24.1E9DDB89@mindspring.com> Date: Tue, 29 Oct 2002 13:31:16 -0800 From: Terry Lambert X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Matthew Dillon Cc: Raymond Kohler , current@FreeBSD.ORG Subject: Re: questions about the state of current References: <2570443.1035916854787.JavaMail.wshttp@emss03g01.ems.lmco.com> <3DBEF55E.A0F9ED1B@mindspring.com> <200210292106.g9TL6aoc010659@apollo.backplane.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matthew Dillon wrote: > That said, it should be noted that nearly all the > really cool development projects are only happening in -current. Not by choice... 8-) 8-). > And, of course, there is the fact that computing power seems to > double every year. Since -current's overhead is in large part > due to mutexes and other concurrency mechanisms, and these are > literally pure-cpu mechanisms rather then memory or I/O dependant, > decisions should be based on capability rather then something as > insignificant as a 15% performance difference between the 'rough cut' > -current and the well aged -stable. In coming years concurrency > is going to become the leading performance-improving mechanism > for computers. I agree that "it's to be expected", but the "it doesn't matter" argument is pretty lame. It matters. Coming to FreeBSD the first time, I would definitely make a decision for 4.7 vs. 5.x if performance were an issue for me. I still have not seen a reasonable justification for interrupt threads (for example), except that they are easier to understand and program. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message