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Re: IVOPT improvement patch
- From: Pat Haugen <pthaugen at us dot ibm dot com>
- To: Xinliang David Li <davidxl at google dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, Zdenek Dvorak <rakdver at kam dot mff dot cuni dot cz>
- Date: Tue, 27 Jul 2010 14:57:11 -0500
- Subject: Re: IVOPT improvement patch
- References: <20100525235926.GA3326@kam.mff.cuni.cz> <AANLkTikGZ-LQGCIlr4K1GIhILtRsTI2MNCPMP5cazPkG@mail.gmail.com> <20100527075632.GA12991@kam.mff.cuni.cz> <AANLkTimY4icwv57CMowcV7UtOXGU2Yqfmg5Z0nwsRSDe@mail.gmail.com> <20100528085052.GA3423@kam.mff.cuni.cz> <AANLkTikNxYZLO3egDnljShqbfFydKrZU70xw8aG6Mfbo@mail.gmail.com> <20100529152243.GA18706@kam.mff.cuni.cz> <AANLkTinXyF9GhrcZxjohiP3ypcfpqgicv4KnegvYWwYR@mail.gmail.com> <20100529191446.GA3996@kam.mff.cuni.cz> <AANLkTimJoc5EeFxvTo731fpE4rGYdLgbOI5l0q9GbG33@mail.gmail.com> <20100604105451.GB5105@kam.mff.cuni.cz> <AANLkTi=iM78LxLm=2R7QxObC0NE0ZkG3YatCnwXHaSpM@mail.gmail.com> <AANLkTinnMVXcAR0eo7LpBioGoC8dT8gR7hD-gfa1vCm2@mail.gmail.com> <AANLkTi=g2zTrKL_0A29WSn1BMn7Jb1X7UB1chVh8kvW4@mail.gmail.com>
>
> Thanks Sebatian for testing it out. I also asked Pat to help testing
> the patch again on powerpc. I will first split off the unrelated
> patches and submit them first (e.g, multiple exit loop handling etc).
>
There were 2 good improvements on PowerPC, the rest were pretty much a wash
(< +/-2%):
410.bwaves 10.0%
434.zeusmp 6.6%
One thing I did notice however is that comparing these results to the run I
did back in May on an earlier version of the patch is that both
improvements dropped. bwaves was 27% on that run and zeusmp was 8.4%. I
don't have the old builds around, but could recreate if you're not aware of
anything to explain the drop.
-Pat