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Re: PATCH: tune ARM's rtx_costs function
- From: James Lemke <jim at wasabisystems dot com>
- To: Richard dot Earnshaw at arm dot com
- Cc: Ian Lance Taylor <ian at wasabisystems dot com>,Ben Elliston <bje at wasabisystems dot com>, gcc-patches at gcc dot gnu dot org
- Date: 09 Oct 2003 16:41:44 -0400
- Subject: Re: PATCH: tune ARM's rtx_costs function
- Organization:
- References: <200310090852.h998qSt22672@pc960.cambridge.arm.com>
> > For "time make CXXFLAGS_FOR_TARGET=-O1 all-target-libstdc++-v3" I get
> > the following times.
> >
> > User time is slightly longer 251.75 vs 252.59 which is +0.33%.
> > Noise level?
> >
> > Reference time with preserve_subexpressions_p ()..
> > real 6m9.795s
> > user 4m11.750s
> > sys 1m48.330s
> >
> > Time without preserve_subexpressions_p ()..
> > real 6m2.698s
> > user 4m12.590s
> > sys 1m46.170s
> >
For "time make CXXFLAGS_FOR_TARGET=-O0 all-target-libstdc++-v3":
User time is virtually identical (-0.03%).
Reference time with preserve_subexpressions_p ()..
real 11m31.243s
user 7m40.630s
sys 3m34.570s
Time without preserve_subexpressions_p ()..
real 11m41.039s
user 7m40.470s
sys 3m38.640s
--
James Lemke jim@wasabisystems.com Orillia, Ontario
http://www.wasabisystems.com