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Article #808Re: P4 vs Athlon for Linux latexing, is gcc-2.95 responsible?
From: George Macdonald
Date: Mon, 17 Jun 2002 09:25
Date: Mon, 17 Jun 2002 09:25
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2396 bytes
On Sun, 16 Jun 2002 09:30:49 GMT, "Robert Myers" <rmyers1400@attbi.com> wrote: > >Without SSE2, which requires that loops be vectorized, a 1.7GHz P2 is a very >weak foating point performer, as many have noted, and as you have confirmed >for yourself. If I take naive code compiled with icc, my overclocked >Celeron running at 1.5MHz will beat a 1.7GHz P4 every time. Are you sure about this? I thought the idea with P4's SSE2 was that for scalar calcs you have addressable registers (no stack) and therefore no need of the FXCH instructions for stack swaps and it runs faster than the old x87 FPU. I've no experience yet but that's how I read things. Rgds, George Macdonald "Just because they're paranoid doesn't mean you're not psychotic" - Who, me??
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f9e16,ea3300a83f1f851c X-Google-Attributes: gidf9e16,public X-Google-Thread: 102b32,ea3300a83f1f851c X-Google-Attributes: gid102b32,public X-Google-Thread: 1045b9,ea3300a83f1f851c X-Google-Attributes: gid1045b9,public X-Google-Thread: f65d0,ea3300a83f1f851c X-Google-Attributes: gidf65d0,public X-Google-ArrivalTime: 2002-06-17 02:25:32 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!feed2.news.rcn.net!rcn!border1.nntp.aus1.giganews.com!nntp.giganews.com!nntp3.aus1.giganews.com!bin7.nnrp.aus1.giganews.com.POSTED!not-for-mail From: fammacd=!SPAM^nothanks@garden.net (George Macdonald) Newsgroups: comp.os.linux.hardware,gnu.gcc,comp.sys.ibm.pc.hardware.chips,comp.text.tex Subject: Re: P4 vs Athlon for Linux latexing, is gcc-2.95 responsible? Message-ID: <3d0da9af.198043171@news.garden.net> References: <3D0B57CB.5060406@nospam.com> <cVYO8.93284$pw3.4355@sccrnsc03> X-Newsreader: Forte Free Agent 1.21/32.243 Lines: 17 NNTP-Posting-Date: Mon, 17 Jun 2002 04:25:14 CDT Organization: Giganews.Com - Premium News Outsourcing X-Trace: sv3-6sWRChvdftbO8czXIHaE0w++7znpSs6MGMpwda9KtogWWvRS62MriAnaXpqef3caiI/Yh5ohxNjJM52!uR1uoQkjJqeleGC7c3qvzISWewoh9FL1WJix2f3hiBCRq8qu+hfsgTFZvprUwrexVQbMAwg= X-Complaints-To: abuse@GigaNews.Com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-Info: Please be sure to forward a copy of ALL headers X-Abuse-Info: Otherwise we will be unable to process your complaint properly Date: Mon, 17 Jun 2002 09:25:14 GMT