Date: Tue, 6 Nov 2012 17:51:48 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: "Samuel J. Greear" <sjg@evilcode.net> Cc: Yuri <yuri@rawbw.com>, freebsd-hackers@freebsd.org Subject: Re: pgbench performance is lagging compared to Linux and DragonflyBSD? Message-ID: <alpine.BSF.2.00.1211061751110.20322@wojtek.tensor.gdynia.pl> In-Reply-To: <CANY-Wm921Xv8KKXtrC%2B_6QkbLE%2BzrYNUmBqT=tO6L0uouJTAwQ@mail.gmail.com> References: <50980ADD.4010402@rawbw.com> <alpine.BSF.2.00.1211061016110.18204@wojtek.tensor.gdynia.pl> <CANY-Wm921Xv8KKXtrC%2B_6QkbLE%2BzrYNUmBqT=tO6L0uouJTAwQ@mail.gmail.com>
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> 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 > <wojtek@wojtek.tensor.gdynia.pl> 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" >
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