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* [Bug other/67893] New: [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu)
@ 2015-10-08 10:22 doko at gcc dot gnu.org
2015-10-08 10:25 ` [Bug other/67893] " doko at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: doko at gcc dot gnu.org @ 2015-10-08 10:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67893
Bug ID: 67893
Summary: [5 Regression] memory hog building a C++ file (on
x86_64-linux-gnu)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
Created attachment 36462
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36462&action=edit
preprocessed source
this is one file from the insighttoolkit software, a swig generated source
file.
built with -g -O2 -fstack-protector-strong -fPIC -fno-strict-aliasing
trunk needs -fpermissive in addition.
memory usage with the 4.9 branch peaks at 2.5G, with the 5 branch at 3.3G, with
trunk at 2.3G.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug other/67893] [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu)
2015-10-08 10:22 [Bug other/67893] New: [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu) doko at gcc dot gnu.org
@ 2015-10-08 10:25 ` doko at gcc dot gnu.org
2015-10-08 11:41 ` rguenth at gcc dot gnu.org
2015-10-08 11:44 ` doko at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: doko at gcc dot gnu.org @ 2015-10-08 10:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67893
--- Comment #1 from Matthias Klose <doko at gcc dot gnu.org> ---
Created attachment 36463
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36463&action=edit
preprocessed source
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug other/67893] [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu)
2015-10-08 10:22 [Bug other/67893] New: [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu) doko at gcc dot gnu.org
2015-10-08 10:25 ` [Bug other/67893] " doko at gcc dot gnu.org
@ 2015-10-08 11:41 ` rguenth at gcc dot gnu.org
2015-10-08 11:44 ` doko at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-10-08 11:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67893
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-10-08
Version|6.0 |5.2.1
Target Milestone|--- |5.3
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can't yet confirm the regression (need to look for a bigger box...) but I can
confirm it uses >2GB even with plain -O2. Note that -O2 has quite some
quadratic algorithms.
As even plain -O1 goes up to 2GB my usual suspect would be DF.
Note that with -O1 frontend processing peaks at 600MB and after gimplification
and lowering we are at 1GB - so this is a huge CU in the first place. Early
opts plus IPA get us to 2GB already (same at -O2).
What's the second preprocessed source from?
Confirmed as memory-hog though.
Unfortunately as the testcase is so large it's hard to work with it but it
looks
like we gradually leak memory during late optimization/expansion, there are no
"big" functions in the end it seems.
Btw, the gcc 5 branch at r228565 peaks at 2.3GB with -O2, -g adds that other
1.2GB (hello var-tracking and VTA).
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug other/67893] [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu)
2015-10-08 10:22 [Bug other/67893] New: [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu) doko at gcc dot gnu.org
2015-10-08 10:25 ` [Bug other/67893] " doko at gcc dot gnu.org
2015-10-08 11:41 ` rguenth at gcc dot gnu.org
@ 2015-10-08 11:44 ` doko at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: doko at gcc dot gnu.org @ 2015-10-08 11:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67893
--- Comment #3 from Matthias Klose <doko at gcc dot gnu.org> ---
> What's the second preprocessed source from?
the same .cpp file built with gcc-4.9.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-10-08 11:44 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2015-10-08 10:22 [Bug other/67893] New: [5 Regression] memory hog building a C++ file (on x86_64-linux-gnu) doko at gcc dot gnu.org
2015-10-08 10:25 ` [Bug other/67893] " doko at gcc dot gnu.org
2015-10-08 11:41 ` rguenth at gcc dot gnu.org
2015-10-08 11:44 ` doko at gcc dot gnu.org
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