From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | PostgreSQL Performance <pgsql-performance(at)postgresql(dot)org> |
Subject: | Re: Intel C/C++ Compiler Tests (fwd) |
Date: | 2006-04-06 13:30:31 |
Message-ID: | 200604061330.k36DUVG04472@candle.pha.pa.us |
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Lists: | pgsql-performance |
> > On 3/22/06 5:56 AM, "Spiegelberg, Greg" <gspiegelberg(at)cranel(dot)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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