[wplug] what is optimized by -march in gcc?
terry mcintyre
terrymcintyre at yahoo.com
Fri May 28 10:13:36 EDT 2004
It would be interesting to extend that test
of optimizations. Split out the kernel and
other sources, to determine how much each
matters; try newer hardware also.
--- "Vanco, Don" <don.vanco at agilysys.com> wrote:
> > Probably. See:
> > http://www.potentialtech.com/wmoran/source.php
> Interesting page - it might be kind of cool to take
> a distro
> like Gentoo and install on a "like system" (of P4
> class) twice, once
> optimized for i386 and once optimized for i686 and
> compare things like
> boot time, browser performance, OpenOffice
> run-times, etc. I recall
> when Mandrake made the leap from an i386 to an i586
> base compile and the
> overall performance increase was notable.
> It's also interesting to note that this flexibility
> (in open
> source) has not been taken advantage of by Red Hat -
> for whatever reason
> they've not made the leap to at least i586 on the
> Enterprise products -
> even though the minimum hardware requirements exceed
> that i386 compile.
> I have tried to re-compile the entire distro in the
> 2.1 days - but there
> were not that many source packages that even had
> optimizations for
> 586/686.
>
> Don
>
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=====
Terry McIntyre
UNIX for hire
software development / systems administration / security
(412)334-1006
terrymcintyre at yahoo.com
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