On Thu, 2013-05-23 at 08:54 -0600, Sandra Loosemore wrote: > On 05/23/2013 06:29 AM, Bill Schmidt wrote: > > > > Sandra and David, > > > > The array-alignment patch is performance-neutral with respect to > > CPU2006. All variations were in the noise range. > > Well, that settles it; I don't see any reason to pursue the patch any > further if it's not a performance win after all. It probably helped on > some specific program or benchmark our original customer was interested > in but that was in an older version of GCC, etc. > > Bill, thanks very much for helping with this.
I'm not sure that's the right message to take away here -- this was just verifying that we didn't see a benchmarking problem with the patch. It seems likely that the patch does have benefits; they just aren't exposed in the particular benchmarks in SPEC CPU2006. I think the patch is worth pursuing, since there aren't any negative consequences in reporting benchmarks. Thanks, Bill > > -Sandra >
