Date: Wed, 26 Nov 2008 10:55:39 +0100 From: "Ivan Voras" <ivoras@freebsd.org> To: "Alexander Leidinger" <Alexander@leidinger.net> Cc: freebsd-performance@freebsd.org Subject: Re: FreeBSD 7.1 BETA 2 vs Opensolaris vs Ubuntu performance Message-ID: <9bbcef730811260155h156b7a6v8c88b0da51f28ee@mail.gmail.com> In-Reply-To: <20081126094314.119834gt66jv0g00@webmail.leidinger.net> References: <DE23C2B055DA4BC683BDCAA95FF7B736@multiplay.co.uk> <gggmbb$un6$1@ger.gmane.org> <20081125173657.GA50429@freebsd.org> <ggher5$qq0$2@ger.gmane.org> <d763ac660811251202n5dafbbl896ad194435436a0@mail.gmail.com> <9bbcef730811251246nf39e825s95a25ae394948e06@mail.gmail.com> <20081126094314.119834gt66jv0g00@webmail.leidinger.net>
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2008/11/26 Alexander Leidinger <Alexander@leidinger.net>: > If you want to test OS performance and use Java programs in there to do so, > you would use the same Java version, wouldn't you? They didn't. Linux: 1.6.0_0-b12 Solaris: 1.6.0_10-b33 FreeBSD: 1.6.0_07-b02 Since system have their local patches (I know FreeBSD does), I don't think it's even possible to test "exactly the same" version ;) But this also goes into the "What OS ships with" category. > If you want to run number crunching software, you are interested in high > computing throughput of your app, so you use a compiler which performs best > for your code in question (which would mean probably the Intel compiler or > the Portland compiler on Linux, maybe the Sun compiler on Solaris, and > probably gcc on FreeBSD). You also want to optimize the code for your CPU > (it makes a difference if you do floating point calculations and are allowed > to use the SSEx or whatever instructions), and not some generic settings the > OS comes with. I think they went with the "stock" configurations as that's what almost all users will use. > The "benchmark" presented there is flawed in a lot of ways. Yes.
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