Date: Wed, 27 Jul 2005 14:40:34 -0500 From: Bob Willcox <bob@immure.com> To: Martin <nakal@nurfuerspam.de> Cc: freebsd-stable@freebsd.org Subject: Re: i386 vs amd64 - benchmark results Message-ID: <20050727194034.GG12576@luke.immure.com> In-Reply-To: <42E67972.4000700@nurfuerspam.de> References: <42E67972.4000700@nurfuerspam.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Jul 26, 2005 at 07:57:06PM +0200, Martin wrote: > > Hi, > > I've tried two benchmarks to check the speed of my > system on two FreeBSD architectures i386 and amd64. > I've never seen anyone posting this kind of benchmark, > so here is what I found out: > > here the results of nbench: > http://phpfi.com/71540 > > here is what openssl speed gives me: > http://phpfi.com/71545 > > Sorry for posting it there, but I don't want to > send attachments to this list. > > Please notice the memory speed penalties while the > system is running on amd64 kernel. I would like to > know what causes this kind of low performance when > memory is being accessed. > > Is this a hardware problem or a problem with FreeBSD? > Generally, FreeBSD-amd64 performs slightly better > than FreeBSD-i386 and it's stable as expected, but > I cannot find any solution to the memory problems > that affect memory intensive applications as you can > see. > > Martin As another data point, below is the nbench output from one of my systems. It's an Athlon 64 3800+ w/ venice core running FreeBSD 6.0-BETA1. Motherboard is an ASUS A8V Deluxe (socket 939) with 1GB of DDR400 RAM (2 512MB sticks). BYTEmark* Native Mode Benchmark ver. 2 (10/95) Index-split by Andrew D. Balsa (11/97) Linux/Unix* port by Uwe F. Mayer (12/96,11/97) TEST : Iterations/sec. : Old Index : New Index : : Pentium 90* : AMD K6/233* --------------------:------------------:-------------:------------ NUMERIC SORT : 2326 : 59.65 : 19.59 STRING SORT : 202.35 : 90.41 : 13.99 BITFIELD : 5.2938e+08 : 90.81 : 18.97 FP EMULATION : 153.36 : 73.59 : 16.98 FOURIER : 18608 : 21.16 : 11.89 ASSIGNMENT : 27.817 : 105.85 : 27.46 IDEA : 3400 : 52.00 : 15.44 HUFFMAN : 1869.4 : 51.84 : 16.55 NEURAL NET : 24.696 : 39.67 : 16.69 LU DECOMPOSITION : 1237.9 : 64.13 : 46.31 ==========================ORIGINAL BYTEMARK RESULTS========================== INTEGER INDEX : 72.257 FLOATING-POINT INDEX: 37.759 Baseline (MSDOS*) : Pentium* 90, 256 KB L2-cache, Watcom* compiler 10.0 ==============================LINUX DATA BELOW=============================== CPU : L2 Cache : OS : FreeBSD 6.0-BETA1 C compiler : cc libc : /lib/libc.so.6 MEMORY INDEX : 19.388 INTEGER INDEX : 17.076 FLOATING-POINT INDEX: 20.942 Baseline (LINUX) : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38 * Trademarks are property of their respective holder. -- Bob Willcox Reality is nothing but a collective hunch. bob@immure.com -- Lily Tomlin Austin, TX
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050727194034.GG12576>