Jan Hubicka wrote:
I am running SPEC on both AMD and Intel machines quite commonly and I
must say that there seems to be difference in between those two. For P4
and Core I get results within something like 1-2 SPEC point (0.1%) of overall
SPEC score, for Athlon I was never able to get so close, the
difference tends to be up to one percent that is often more than
expected speedup I am looking for.
Of course it might be property of the boxes I have, but there is no
difference in setup of those machines, just it seems to be happening
this way. Running the tests more times in sequence tends to stabilize
Athlon results, so what I often do is to simply configure peak runs to
do something interesting and use same base runs, since peak scores tends
to be slightly better than base scores even for identical binaries.
(that makes development easier, but not GCC better :)
Interesting, Jan. I did not know that AMD machines are so unstable.
