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* [Bug gcov-profile/94410] New: 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options @ 2020-03-30 17:53 jamborm at gcc dot gnu.org 2020-03-30 17:58 ` [Bug gcov-profile/94410] " jamborm at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: jamborm at gcc dot gnu.org @ 2020-03-30 17:53 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94410 Bug ID: 94410 Summary: 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: gcov-profile Assignee: unassigned at gcc dot gnu.org Reporter: jamborm at gcc dot gnu.org CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org Blocks: 26163 Target Milestone: --- Host: x86_64-linux Target: x86_64-linux SPEC 2017 FPrate benchmark 511.povray_r runs 11 % slower on AMD Zen2 CPU and 10% slower on Intel Cascade Lake server CPU when built with -O2 (generic march/tuning) and both PGO and LTO with trunk (revision 26b3e568a60) than when compiled with the same options with GCC 9. Bisecting revealed that the slowdown was introduced with: commit 2925cad2151842daa387950e62d989090e47c91d Author: Jan Hubicka <hubicka@ucw.cz> Date: Thu Oct 3 17:08:21 2019 +0200 params.def (PARAM_INLINE_HEURISTICS_HINT_PERCENT, [...]): New. * params.def (PARAM_INLINE_HEURISTICS_HINT_PERCENT, PARAM_INLINE_HEURISTICS_HINT_PERCENT_O2): New. * doc/invoke.texi (inline-heuristics-hint-percent, inline-heuristics-hint-percent-O2): Document. * tree-inline.c (inline_insns_single, inline_insns_auto): Add new hint attribute. (can_inline_edge_by_limits_p): Use it. From-SVN: r276516 The revision just before it was even 9% and 7% faster than GCC 9 on AMD and Intel respectively. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163 [Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95) ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug gcov-profile/94410] 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options 2020-03-30 17:53 [Bug gcov-profile/94410] New: 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options jamborm at gcc dot gnu.org @ 2020-03-30 17:58 ` jamborm at gcc dot gnu.org 2020-03-30 20:17 ` jamborm at gcc dot gnu.org 2023-01-18 17:52 ` jamborm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jamborm at gcc dot gnu.org @ 2020-03-30 17:58 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94410 Martin Jambor <jamborm at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=94360 --- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> --- PR94360 is another O2 PGO+LTO bug where the commit caused a slowdown. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug gcov-profile/94410] 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options 2020-03-30 17:53 [Bug gcov-profile/94410] New: 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options jamborm at gcc dot gnu.org 2020-03-30 17:58 ` [Bug gcov-profile/94410] " jamborm at gcc dot gnu.org @ 2020-03-30 20:17 ` jamborm at gcc dot gnu.org 2023-01-18 17:52 ` jamborm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jamborm at gcc dot gnu.org @ 2020-03-30 20:17 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94410 --- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> --- For the record, SPEC 2006 453.povray is similarly affected, the commit makes it run 26% slower. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug gcov-profile/94410] 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options 2020-03-30 17:53 [Bug gcov-profile/94410] New: 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options jamborm at gcc dot gnu.org 2020-03-30 17:58 ` [Bug gcov-profile/94410] " jamborm at gcc dot gnu.org 2020-03-30 20:17 ` jamborm at gcc dot gnu.org @ 2023-01-18 17:52 ` jamborm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jamborm at gcc dot gnu.org @ 2023-01-18 17:52 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94410 --- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> --- This is still the case, as can be seen on LNT (GCC 9 is the dot in the left bottom corner): https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=690.467.0&plot.1=745.467.0&plot.2=777.467.0&plot.3=687.467.0& ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-01-18 17:52 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-03-30 17:53 [Bug gcov-profile/94410] New: 511.povray_r is 11% slower built at -O2 PGO+LTO than with GCC 9 and same options jamborm at gcc dot gnu.org 2020-03-30 17:58 ` [Bug gcov-profile/94410] " jamborm at gcc dot gnu.org 2020-03-30 20:17 ` jamborm at gcc dot gnu.org 2023-01-18 17:52 ` jamborm at gcc dot gnu.org
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