Bug 88801 - [9 Regression] Performance regression on 473.astar on aarch64
Summary: [9 Regression] Performance regression on 473.astar on aarch64
Status: RESOLVED INVALID
Alias: None
Product: gcc
Classification: Unclassified
Component: tree-optimization (show other bugs)
Version: 9.0
: P3 normal
Target Milestone: 9.0
Assignee: Not yet assigned to anyone
URL:
Keywords: missed-optimization, needs-bisection
Depends on:
Blocks: spec
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Reported: 2019-01-11 11:38 UTC by ktkachov
Modified: 2019-01-15 13:52 UTC (History)
3 users (show)

See Also:
Host:
Target: aarch64
Build:
Known to work:
Known to fail:
Last reconfirmed: 2019-01-11 00:00:00

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Description ktkachov 2019-01-11 11:38:47 UTC 
We've noticed a performance regression recently on 473.astar on aarch64 (a Cortex-A57 platform).
On our systems we see about 8% slowdown and I also see a 4% slowdown (among other similar slowdowns) at:
https://lnt.opensuse.org/db_default/v4/SPEC/1947
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=13.260.0&highlight_run=1947

I suspect this is something to do with the recent inlining tweaks.
Comment 1 Martin Liška 2019-01-11 11:43:28 UTC 
Can you please bisect that?
Comment 2 ktkachov 2019-01-15 13:52:37 UTC 
I couldn't reproduce it myself after all and I don't see it anymore in our testers