<[EMAIL PROTECTED]> wrote:
>
> On Aug 31, 2005, at 3:40 PM, girish vaitheeswaran
> wrote:
>
> > I do not see this flag in gcc3.4.4.
> >
> >
> > Am I missing something?
> >>
>
> >> you may try adding -fmove-loop-invariants flag,
> >&g
I do not see this flag in gcc3.4.4.
perflab2% gcc -o conftest -O3 -march=pentium4
-fmove-loop-invariants conftest.c
cc1: error: unrecognized command line option
"-fmove-loop-invariants"
Am I missing something?
-girish
--- Zdenek Dvorak <[EMAIL PROTECTED]>
wrote:
> Hello,
>
> > >A more likel
I have tried with gcc 3.4.4 and still see the same
20%slowdown. If you folks are able to crack this, do
let me know. On my earlier attempts I had tried to
disable all of the flags that feedback optimization
turns on (except the ones that are turned on by
default) and still got the 20% slowdown.
Is
individual flags on a trial
> and
> > > error
> > > > basis. If so what would be the flags to start
> the
> > > It would be probably better to just turn off the
> > > individual
> > > optimizations with -fprofile-use (for
> optimizations
> > > that are
> would be lot easier to fix it...
>
> Honza
> > trials with.
> >
> > -girish
> >
> > --- Jan Hubicka <[EMAIL PROTECTED]> wrote:
> >
> > > > On Wed, Jul 20, 2005 at 10:45:01AM -0700,
> girish
> > > vaitheeswaran wrote
I am using -O3. This is the only flag apart from the
profile flag -fprofile-use.
I had independently tried -march=pentium4 and that did
not buy any performance for this app.
-girish
--- Kelley Cook <[EMAIL PROTECTED]> wrote:
> > I started with a clean slate in my build
> environment
> > and di
wrote:
> > On Wed, Jul 20, 2005 at 10:45:01AM -0700, girish
> vaitheeswaran wrote:
> > > > --- Steven Bosscher <[EMAIL PROTECTED]> wrote:
> > > >
> > > > > On Wednesday 20 July 2005 18:53, girish
> vaitheeswaran wrote:
> > > > &g
This is on Intel Pentium4 on Linux.
-girish
--- Janis Johnson <[EMAIL PROTECTED]> wrote:
> On Wed, Jul 20, 2005 at 10:45:01AM -0700, girish
> vaitheeswaran wrote:
> > > --- Steven Bosscher <[EMAIL PROTECTED]> wrote:
> > >
> > > > On Wednesday
I am using gcc 3.4.3
-girish
>
>
> --- Steven Bosscher <[EMAIL PROTECTED]> wrote:
>
> > On Wednesday 20 July 2005 18:53, girish
> > vaitheeswaran wrote:
> > > I am seeing a 20% slowdown with feedback
> > optimization.
> > > Does anyone h
I am seeing a 20% slowdown with feedback optimization.
Does anyone have any thoughts on this.
These are the steps I followed
1. Compiled the application using -fprofile-generate.
I used this flag both in the compile flags and as part
of the link flags. I also had to use libgcov.a during
the link p
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