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From: "pheeck at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/114414] New: [14 Regression] 15-18% exec time slowdown of 433.milc on Zen2 Date: Thu, 21 Mar 2024 10:35:25 +0000 [thread overview] Message-ID: <bug-114414-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114414 Bug ID: 114414 Summary: [14 Regression] 15-18% exec time slowdown of 433.milc on Zen2 Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: missed-optimization, needs-bisection Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: pheeck at gcc dot gnu.org Blocks: 26163 Target Milestone: --- Host: x86_64-linux Target: x86_64-linux As seen here https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=685.70.0 there is an 18% slowdown of the 433.milc SPEC 2006 benchmark between commits g:74e8cc28eda9b1d7 g:81ee1298b47d3f3b The compilation options are -O2 -flto PGO. The CPU is AMD Zen2. I've replicated this slowdown on another Zen2 machine. There the slowdown was only 15%. Btw here is the same plot but with comparisons to GCC13 and GCC12 https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=685.70.0&plot.6=921.70.0&plot.7=762.70.0 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)
next reply other threads:[~2024-03-21 10:35 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-21 10:35 pheeck at gcc dot gnu.org [this message] 2024-03-21 10:36 ` [Bug target/114414] " pheeck at gcc dot gnu.org 2024-03-22 12:34 ` law at gcc dot gnu.org 2024-03-27 8:02 ` rguenth at gcc dot gnu.org 2024-03-28 10:33 ` [Bug target/114414] " pheeck at gcc dot gnu.org 2024-03-28 12:12 ` pheeck at gcc dot gnu.org
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