On Mon, 6 Apr 2009, Toon Moene wrote: > I wrote: > > > Richard Guenther wrote: > > > > > I plan to merge the alias-improvements branch next weekend (in 7 days) > > > if all goes well. I will do bootstrap & regtesting on the archs > > > I have available (x86_64, i?86, ppc, ppc64, ia64, s390 and s390x). > > > > I am absolutely thrilled to test it on our weather forecasting system. The > > top routine in our profile looks a *lot* like the loop you got such an > > improvement on in SPEC's mgrid ... > > Unfortunately, the improvement is not as large as I had hoped: > > Before the merge of the alias-improvements branch into mainline: > 00 UTC run 20090405, last file produced: > > -rw-r--r-- 1 hirlam hirlam 21492000 2009-04-05 08:31 fc20090405_00+048ve > > After the merge of the alias-improvements branch into mainline: > 00 UTC run 20090406, last file produced: > > -rw-r--r-- 1 hirlam hirlam 21648000 2009-04-06 08:29 fc20090406_00+048ve > > So the improvement is 2 minutes for a 3.5 hour run (~ 1%).
Well, I certainly didn't expect any magic ;) The overall SPEC FP improvement is in the 3% range (depending on target and optimization options). Richard.
