From: Bruce Momjian <pgman@candle.pha.pa.us>
To: PostgreSQL Performance <pgsql-performance@postgresql.org>
Subject: Re: Intel C/C++ Compiler Tests (fwd)
Date: Thu, 6 Apr 2006 09:30:31 -0400 (EDT)
Message-ID: <200604061330.k36DUVG04472@candle.pha.pa.us> (raw)
In-Reply-To: <66602070604060345v3dbdd140w64f320897974f322@mail.gmail.com>
> > On 3/22/06 5:56 AM, "Spiegelberg, Greg" <gspiegelberg@cranel.com> wrote:
> >
> > > Has anyone tested PostgreSQL 8.1.x compiled with Intel's Linux C/C++
> > > compiler?
> >
> > We used to compile 8.0 with icc and 7.x before that. We found very good
> > performance gains for Intel P4 architecture processors and some gains for
> > AMD Athlon.
> >
> > Lately, the gcc compilers have caught up with icc on pipelining
> > optimizations and they generate better code for Opteron than icc, so we
> > found that icc was significantly slower than gcc on Opteron and no
> > different
> > on P4/Xeon.
> >
> > Maybe things have changed in newer versions of icc, the last tests I did
> > were about 1 year ago.
EnterpriseDB is seeing the same thing, that gcc4 now has the same
performance as icc, and is more flexible.
--
Bruce Momjian http://candle.pha.pa.us
+ If your life is a hard drive, Christ can be your backup. +
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To: pgsql-performance@postgresql.org
Cc: pgman@candle.pha.pa.us
Subject: Re: Intel C/C++ Compiler Tests (fwd)
In-Reply-To: <200604061330.k36DUVG04472@candle.pha.pa.us>
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