Date: Tue, 10 Dec 1996 19:47:40 +0100 (MET) From: Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de> To: lindgren@istudio.no (Simon Lindgren) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD on a PPRO Message-ID: <199612101847.TAA16437@gilberto.physik.rwth-aachen.de> In-Reply-To: <3.0.32.19961210182048.00ba6680@istudio.no> from Simon Lindgren at "Dec 10, 96 06:20:49 pm"
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> Does FreeBSD (2.1.6R) take full potential of a Pentium PRO? > Will there be a significant speed-increase when upgrading from a > regular pentium of same speeds? > > Some insight would be appreciated. We have P5/166 here and one P6/200 and the first results when people compiled their large physics programs (which are doing very little disk i/o) were disappointing. They ran some Monte Carlos over 20 hours and it turned out that one P5/166 was slightly faster than tha P6/200 (!). I then brought pgcc on the PPRO and recompiled all libm (msun) with -O2 -ffast-math -m486 and linked the program statically. With this program then we went on the two machines and the PPro/200 (256K cache) turned out to be 1.5 time faster than th P5/166. I wonder where I might squeeze out the last microseconds. Perhaps carefully selecting the bzero optimization? > > > > ------------------------------------------------------ > Simon Lindgren | Webarkitekt/Produktsjef > lindgren@istudio.no | Internett Studio AS > http://www.sn.no/~lindgren | http://www.istudio.no/ > ------------------------------------------------------ > > --Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de
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