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* [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently
[not found] <bug-86007-4@http.gcc.gnu.org/bugzilla/>
@ 2022-07-06 21:38 ` stefantalpalaru at yahoo dot com
2022-07-06 21:40 ` pinskia at gcc dot gnu.org
2022-07-06 21:42 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: stefantalpalaru at yahoo dot com @ 2022-07-06 21:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86007
--- Comment #4 from Ștefan Talpalaru <stefantalpalaru at yahoo dot com> ---
Mystery solved: half the CPU cores report LWP as disabled, the other half as
enabled.
Both at boot, as seen with "grep -E '(core id|lwp)' /proc/cpuinfo" and
afterwards, using the CPUID instruction: "cpuid | grep 'lightweight profiling
support'".
So, depending on which CPU core GCC runs on, "-march=native" will enable or not
"-mlwp".
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently
[not found] <bug-86007-4@http.gcc.gnu.org/bugzilla/>
2022-07-06 21:38 ` [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently stefantalpalaru at yahoo dot com
@ 2022-07-06 21:40 ` pinskia at gcc dot gnu.org
2022-07-06 21:42 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-07-06 21:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86007
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Ștefan Talpalaru from comment #4)
> Mystery solved: half the CPU cores report LWP as disabled, the other half as
> enabled.
That has to be a kernel issue and not a GCC issue ....
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently
[not found] <bug-86007-4@http.gcc.gnu.org/bugzilla/>
2022-07-06 21:38 ` [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently stefantalpalaru at yahoo dot com
2022-07-06 21:40 ` pinskia at gcc dot gnu.org
@ 2022-07-06 21:42 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-07-06 21:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86007
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Not a GCC bug, a kernel bug.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-07-06 21:42 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-86007-4@http.gcc.gnu.org/bugzilla/>
2022-07-06 21:38 ` [Bug target/86007] precompiled header on bdver2 with -march=native triggers a "created and used with differing settings of '-mlwp'" warning, intermittently stefantalpalaru at yahoo dot com
2022-07-06 21:40 ` pinskia at gcc dot gnu.org
2022-07-06 21:42 ` pinskia at gcc dot gnu.org
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