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* [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
@ 2023-05-31 11:43 d_vampile at 163 dot com
2023-05-31 12:14 ` [Bug target/110059] " d_vampile at 163 dot com
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: d_vampile at 163 dot com @ 2023-05-31 11:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
Bug ID: 110059
Summary: When SPEC is used to test the GCC (10.3.1), the test
result of subitem 548 fluctuates abnormally.
Product: gcc
Version: 10.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: d_vampile at 163 dot com
Target Milestone: ---
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/110059] When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
@ 2023-05-31 12:14 ` d_vampile at 163 dot com
2023-05-31 12:23 ` pinskia at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: d_vampile at 163 dot com @ 2023-05-31 12:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
d_vampile <d_vampile at 163 dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|10.3.1 |10.3.0
Target| |aarch64
URL| |https://gcc.gnu.org/piperma
| |il/gcc-patches/2019-Septemb
| |er/530304.html
--- Comment #1 from d_vampile <d_vampile at 163 dot com> ---
When the SPEC is used to test the GCC (10.3.0) performance, the test result of
subitem 548 fluctuates abnormally.
Trace the cause of the exception. I analyze that the commit(r276140) is faulty.
Revert this commit(r276140), and the fluctuation of spec 548 test results for
gcc 10.3.0 is significantly reduced. The following is the test result.
GCC 10.3.0 test result:
Benchmarks copies runtime ratio
548.exchange2_r 128 553 607
548.exchange2_r 128 512 654
548.exchange2_r 128 513 654
548.exchange2_r 128 553 607
548.exchange2_r 128 553 607
548.exchange2_r 128 514 652
548.exchange2_r 128 515 652
548.exchange2_r 128 553 607
548.exchange2_r 128 553 607
548.exchange2_r 128 508 660
Test result after revert this commit:
Benchmarks copies runtime ratio
548.exchange2_r 128 520 645
548.exchange2_r 128 680 494
548.exchange2_r 128 527 637
548.exchange2_r 128 679 494
548.exchange2_r 128 524 640
548.exchange2_r 128 679 494
548.exchange2_r 128 524 640
548.exchange2_r 128 524 640
548.exchange2_r 128 520 645
548.exchange2_r 128 521 644
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/110059] When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
2023-05-31 12:14 ` [Bug target/110059] " d_vampile at 163 dot com
@ 2023-05-31 12:23 ` pinskia at gcc dot gnu.org
2023-05-31 13:42 ` ktkachov at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-05-31 12:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2023-05-31
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What core is this on?
Second, if the benchmark is this noisy, then the issue is not the code that is
generated but rather how the code is executed.
Can you pinpoint the code that changes because of this change?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/110059] When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
2023-05-31 12:14 ` [Bug target/110059] " d_vampile at 163 dot com
2023-05-31 12:23 ` pinskia at gcc dot gnu.org
@ 2023-05-31 13:42 ` ktkachov at gcc dot gnu.org
2023-05-31 13:54 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ktkachov at gcc dot gnu.org @ 2023-05-31 13:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktkachov at gcc dot gnu.org
--- Comment #3 from ktkachov at gcc dot gnu.org ---
548.exchange2_r was improved in GCC 12 after PR98782 was fixed. I'd suggest you
try out a later version of GCC
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/110059] When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
` (2 preceding siblings ...)
2023-05-31 13:42 ` ktkachov at gcc dot gnu.org
@ 2023-05-31 13:54 ` jakub at gcc dot gnu.org
2023-06-02 7:30 ` rguenth at gcc dot gnu.org
2023-06-05 1:41 ` d_vampile at 163 dot com
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2023-05-31 13:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd like to point out that doing performance testing for GCC 10 at this point
isn't a very good idea, GCC 10 is going out of support within a month or two,
and while some important wrong-code generation bugs can be still fixed there,
it is very unlikely any performance related bugs would be fixed there. Of
course, if you find a performance problem with GCC 13 or even better trunk
compared to GCC 9 or older and then bisect it to a particular change, it is
helpful.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/110059] When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
` (3 preceding siblings ...)
2023-05-31 13:54 ` jakub at gcc dot gnu.org
@ 2023-06-02 7:30 ` rguenth at gcc dot gnu.org
2023-06-05 1:41 ` d_vampile at 163 dot com
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-06-02 7:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
The "after revert" numbers fluctuate more, so not sure what you are after.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/110059] When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally.
2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
` (4 preceding siblings ...)
2023-06-02 7:30 ` rguenth at gcc dot gnu.org
@ 2023-06-05 1:41 ` d_vampile at 163 dot com
5 siblings, 0 replies; 7+ messages in thread
From: d_vampile at 163 dot com @ 2023-06-05 1:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
d_vampile <d_vampile at 163 dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 7+ messages in thread
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2023-05-31 11:43 [Bug target/110059] New: When SPEC is used to test the GCC (10.3.1), the test result of subitem 548 fluctuates abnormally d_vampile at 163 dot com
2023-05-31 12:14 ` [Bug target/110059] " d_vampile at 163 dot com
2023-05-31 12:23 ` pinskia at gcc dot gnu.org
2023-05-31 13:42 ` ktkachov at gcc dot gnu.org
2023-05-31 13:54 ` jakub at gcc dot gnu.org
2023-06-02 7:30 ` rguenth at gcc dot gnu.org
2023-06-05 1:41 ` d_vampile at 163 dot com
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