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- Newsgroups: comp.arch
- Path: 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
-
- 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
-