https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94373
Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=98782
Summary|548.exchange2_r run time is |548.exchange2_r run time is
|7-12% worse than GCC 9 at |16-35% worse than GCC 9 at
|-O2 and generic march/mtune |-O2 and generic march/mtune
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-02-04
--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
The regression is confirmed, it is now 35% on Cascadelake, 20% on Zen3
and 16% on Zen2 against GCC 9 (19%, 12% and 8% respectively against
GCC 10)
LNT sees it too:
- on znver2 (though with LTO):
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=278.407.0&plot.1=298.407.0&;
- on znver1:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=303.407.0&plot.1=31.407.0&;
- on a Kabylake:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=206.407.0&plot.1=30.407.0&;
I wonder whether the RA issue PR 98782 might be also related, although
it mostly focuses on -O3.
