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Re: 7.3 vs 8.0 server performance



CAn you please tell me from wher I could get the statistics so I could
convey it to my boss.

----- Original Message -----
From: "Steve Snyder" <swsnyder insightbb com>
To: <valhalla-list redhat com>; "Keith Mastin" <kmastin beechtree ca>
Sent: Saturday, December 21, 2002 9:03 PM
Subject: Re: 7.3 vs 8.0 server performance


> On Saturday 21 December 2002 09:13 am, Keith Mastin wrote:
> > >I'll bet that the performance improvement comes from using GCC v3.2 to
> > >build the binaries.  I understand that the newer compiler generates
> > > much better code than the v2.96 that Red Hat used for the v7.x
> > > releases.
> >
> > So it's really nothing in the kernel structure or the filesystem that
> > would make the performance improvement then, is what I get from your
> > assumption... rpm doesn't use gcc to install the pre-built binaries,
> > and I don't install gcc on servers, so if this is the case there should
> > be no significant increases if I upgrade.
>
> Red Hat v8.0 is using basically the same kernel (and default filesystem)
> as RH 7.3.
>
> The difference is that all the packages in the 8.0 distribution have been
> built with a compiler than generates more efficient sequences of opcodes,
> yeilding binaries that run faster on the same hardware when compiling the
> same source code.
>
> It doesn't matter whether you install the GCC packages or not.  What
> matters is the compiler and compiler optimizations used to generate the
> binaries that you do install.
>
> On a related note, the current versions of GCC support optimizing
> specifically for the Pentium4 (and presumably Xeon) processors.  The
> v2.96 compiler shipped with RH 7.x lacks this support.
>
> It's all about how well tuned the software is to your hardware
> environment.
>
> Hope this explains my earlier comment.
>
>
>
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