Date: Tue, 24 Feb 2004 22:26:52 +0200 From: Nikos Ntarmos <ntarmos@ceid.upatras.gr> To: Oliver Lehmann <lehmann@ans-netz.de> Cc: freebsd-alpha@FreeBSD.org Subject: Re: Bad performance on alpha? (make buildworld) Message-ID: <20040224202652.GA13675@diogenis.ceid.upatras.gr> In-Reply-To: <20040223192103.59ad7b69.lehmann@ans-netz.de> References: <20040223192103.59ad7b69.lehmann@ans-netz.de>
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Hi there. On Mon, Feb 23, 2004 at 07:21:03PM +0100, Oliver Lehmann wrote: > I run several buildworld's on both, an Alpha EV56 and a Intel > PII. I'm wondering that the Pentium beats the Alpha. Both systems > have INVARIANTS* and WITNESS* disabled. Furthermore, no special > tweakups - nearly "out of the box" configured. IIRC the 600MHz EV56's performance wrt integer operations (such as compiling) is somewhere in the vicinity of a 400MHz P-II, so the difference you see in turn-around times when buildworld'ing isn't quite that big. If the operations were identical, you should see better times when building on the alpha. However, also take into account that compiling (and optimizing) for a RISC CPU, apart from generating larger binaries, is AFAIK supposedly more difficult than compiling (and optimizing) for a CISC CPU. Let alone when compiling using a compiler compiled with a compiler (nice, huh?) highly optimized for x86 platforms but not as good when it comes to the AXP arch. \n\n -- Nikos "Noth" Ntarmos | < ntarmos at ceid dot upatras dot gr > NetCINS Lab. @ C.E.I.D. | [ http://{noth,p2p}.ceid.upatras.gr/ ] U. of Patras - Greece | ( 38.2594N, 21.7428E ) ( 1024D / CF95160A )
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