From owner-freebsd-hackers@FreeBSD.ORG Tue Nov 6 16:52:01 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3F7B1706 for ; Tue, 6 Nov 2012 16:52:01 +0000 (UTC) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from wojtek.tensor.gdynia.pl (wojtek.tensor.gdynia.pl [89.206.35.99]) by mx1.freebsd.org (Postfix) with ESMTP id 30AC48FC08 for ; Tue, 6 Nov 2012 16:51:59 +0000 (UTC) Received: from wojtek.tensor.gdynia.pl (localhost [127.0.0.1]) by wojtek.tensor.gdynia.pl (8.14.5/8.14.5) with ESMTP id qA6GpmoO020331; Tue, 6 Nov 2012 17:51:48 +0100 (CET) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from localhost (wojtek@localhost) by wojtek.tensor.gdynia.pl (8.14.5/8.14.5/Submit) with ESMTP id qA6Gpms4020328; Tue, 6 Nov 2012 17:51:48 +0100 (CET) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Date: Tue, 6 Nov 2012 17:51:48 +0100 (CET) From: Wojciech Puchar To: "Samuel J. Greear" Subject: Re: pgbench performance is lagging compared to Linux and DragonflyBSD? In-Reply-To: Message-ID: References: <50980ADD.4010402@rawbw.com> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.7 (wojtek.tensor.gdynia.pl [127.0.0.1]); Tue, 06 Nov 2012 17:51:49 +0100 (CET) Cc: Yuri , freebsd-hackers@freebsd.org X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Nov 2012 16:52:01 -0000 > Your entire email is conjecture, the performance of DragonFly 3.2 is > improved across the board vs 3.0. Not just batch performance, > interactive performance (especially under X11) is also greatly > improved. i must try. i checked 3.0 and earlier versions and it was a disaster. Relative to FreeBSD of course. > > Sam > > On Tue, Nov 6, 2012 at 2:25 AM, Wojciech Puchar > wrote: >>> some serious system issue. >>> >>> It looks like the DragonflyBSD folks made a goal to do well on pgbench and >>> got to the level of ~88% of linux with 80 clients. >> >> >> It's just bad that anyone judge and (even worse) modify/tune operating >> system to do well in SINGLE benchmark running basically single program doing >> few repetitive things. >> >> Linux is tuned to win in benchmark and it does, while having disastrous >> performance in normal unix style usage - multiple different programs doing >> multiple different things for multiple different users - in the same time. >> >> This is a case with at least 99% of users. The less than 1% that have so >> heavy load that needs separete machine dedicated to single program doing one >> thing - could use linux (if it REALLY will be better in production workload >> ) or even better - use some dedicated hardware just for this, if it exist. >> >> Does machine that is dedicated to run single program need OS at all? >> >> >> In such "benchmark" FreeBSD with UFS wins hands down and that's the reason i >> use it. >> >> >> Still it is interesting WHY FreeBSD is slower in that special case, and if >> improvements on general behaviour can be found then it's nice to do them. >> >> >> I tried dragonflybsd some time ago and it's performance on normal usage is >> disastrous. Seems like Matthew Dillion years after splitting from FreeBSD >> because "the algorithms used in FreeBSD were plain wrong" - cannot do this >> better but still waste time and still at all cost want to prove he can. >> >> Tuning operating system for single benchmark is an example of that childish >> behaviour. >> >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >