Date: Mon, 23 Feb 2004 21:51:53 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Wilko Bulte <wkb@freebie.xs4all.nl> Cc: freebsd-alpha@freebsd.org Subject: Re: Bad performance on alpha? (make buildworld) Message-ID: <20040223205152.GC44313@cicely12.cicely.de> In-Reply-To: <20040223191652.GB5837@freebie.xs4all.nl> References: <20040223192103.59ad7b69.lehmann@ans-netz.de> <20040223191652.GB5837@freebie.xs4all.nl>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040223205152.GC44313>