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Article #11015Re: Performance of Alpha on SPECfp92 (alvinn and ear)
From: Danny K. Jain
Date: Tue, 17 Nov 1992 01:25
Date: Tue, 17 Nov 1992 01:25
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tremblay@flayout.Eng.Sun.COM (Marc Tremblay) writes: >Considering that this hypothetical HP machine has 2 cycle latency >floating-point operations, much closer caches, muladd capabilities, >smaller mispredicted branch penalty, etc., these numbers are quite >surprising. They represent a swing of maybe 30% in the opposite >direction. DEC must be doing something pretty fancy with their >compilers. Could someone from DEC comment on what kind of >optimizations were used on alvinn and ear? I think that the reason that Alpha has more Specmarks that HP, even if both were at the same clock frequency, is because Alpha is a 2-issue machine while the HP is a single issue machine. -Danny Jain -Motorola
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Newsgroups: comp.arch Path: arc1-ca.pugleaf.net!sparky!uunet!ukma!darwin.sura.net!zaphod.mps.ohio-state.edu!cs.utexas.edu!oakhill!dannyj From: dannyj@oakhill.sps.mot.com (Danny K. Jain) Subject: Re: Performance of Alpha on SPECfp92 (alvinn and ear) Message-ID: <1992Nov17.012550.7243@oakhill.sps.mot.com> Organization: Motorola Inc., Austin, Texas References: <lg54apINNf1@exodus.Eng.Sun.COM> Date: Tue, 17 Nov 1992 01:25:50 GMT Lines: 16