From owner-freebsd-amd64@FreeBSD.ORG Tue Sep 6 13:47:43 2005 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6D65C16A41F for ; Tue, 6 Sep 2005 13:47:43 +0000 (GMT) (envelope-from freebsd@meijome.net) Received: from sigma.octantis.com.au (ns2.octantis.com.au [207.44.189.124]) by mx1.FreeBSD.org (Postfix) with ESMTP id EBB3A43D66 for ; Tue, 6 Sep 2005 13:47:42 +0000 (GMT) (envelope-from freebsd@meijome.net) Received: (qmail 21365 invoked from network); 6 Sep 2005 23:47:42 +1000 Received: from 203-173-33-12.dyn.iinet.net.au (HELO ?192.168.13.3?) (203.173.33.12) by sigma.octantis.com.au with (DHE-RSA-AES256-SHA encrypted) SMTP; 6 Sep 2005 23:47:42 +1000 Message-ID: <431D9DF9.3000706@meijome.net> Date: Tue, 06 Sep 2005 23:47:37 +1000 From: Norberto Meijome User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Kris Kennaway References: <4316A5BC.1000405@meijome.net> <20050906000016.GA91835@xor.obsecurity.org> <431D4944.9020907@mail.uni-mainz.de> <20050906082229.GA27104@xor.obsecurity.org> In-Reply-To: <20050906082229.GA27104@xor.obsecurity.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "O. Hartmann" , freebsd-amd64@freebsd.org Subject: Re: Which SCHED_ for DB server X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Sep 2005 13:47:43 -0000 Kris Kennaway wrote: >> >>Interesting. >>An, by the way, what are the benefits of ULE at this moment? Is it still >>a more experimental scheduler for the far future on SMP based machines >>or do we have benefits in UP/SMP? > > > It was supposed to provide higher performance (and did for a while, > modulo panics), but at the moment it still needs work. > > Kris Thanks everyone for the comments. BTW, this is only a minimal SMP system (2 way Opteron), so not sure whether it'd make much difference anyway. using 4BSD for now until I have some real-world apps running in order to test. btw, any chance of other schedulers being added to fbsd, like the staircase sched found in linux , or maybe others? (not offering as I can't code @ that level, just curious) thanks again, beto