Re: Bad performance on alpha? (make buildworld)

From: Bernd Walter (ticso_at_cicely12.cicely.de)
Date: 02/23/04

  • Next message: Bernd Walter: "Re: Bad performance on alpha? (make buildworld)" 
    Date: Mon, 23 Feb 2004 21:51:53 +0100
To: Wilko Bulte <wkb@freebie.xs4all.nl>

    On Mon, Feb 23, 2004 at 08:16:52PM +0100, Wilko Bulte wrote:
    > On Mon, Feb 23, 2004 at 07:21:03PM +0100, Oliver Lehmann wrote:
    > > Hi,
    > >
    > > 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.
    >
    > ...
    >
    > > And I don't think CURRENT is that "faster" than 5.2.1. Why does (my) alpha
    > > performs so bad? Some ideas? Is that behaviour common for FreeBSD/alpha or
    > > did I missed something in my consideration?
    >
    > Bit of a FAQ, but the last time I checked it was due to the code generation
    > for Alpha being lots slower.

    I think thats around factor 2-4 slower.
    Especially without having CPUTYPE >=ev56 set.
    In fact te factor varies much around machine types, compiled code,
    compiler version and moon phase.
    Also I think the values are not that bad considered that the ev56
    core is years older than that of the PII. 

    -- 
B.Walter                   BWCT                http://www.bwct.de
ticso@bwct.de                                  info@bwct.de
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