Bug 531218

Summary:

Ridiculously slow compilation

Product:

[Fedora] Fedora

Reporter:

Susi Lehtola <susi.lehtola>

Component:

gcc

Assignee:

Jakub Jelinek <jakub>

Status:

CLOSED ERRATA

QA Contact:

Fedora Extras Quality Assurance <extras-qa>

Severity:

medium

Docs Contact:

Priority:

low

Version:

CC:

jakub, oget.fedora

Target Milestone:

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Target Release:

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Hardware:

All

OS:

Linux

Whiteboard:

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Environment:

Last Closed:

2010-02-11 16:49:32 UTC

Type:

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Regression:

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Documentation:

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CRM:

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Category:

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oVirt Team:

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RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Attachments:

Description	Flags
Preprocessed source	none

Description Susi Lehtola 2009-10-27 11:07:59 UTC

There seems to be some kind of a bug in gcc-4.4.2-4.fc12 that makes compilation ridiculously slow. The srpm

http://theory.physics.helsinki.fi/~jzlehtol/rpms/psi-3.4.0-3.fc12.src.rpm

has been building in koji
 http://koji.fedoraproject.org/koji/taskinfo?taskID=1768528
for 21 hours now. On EPEL 5 (gcc-4.1.2-46.el5) the same srpm builds with the same options within a half hour or so.

The problems seem to come out in the compilation of the libint library, that is machine generated.

Comment 1 Bug Zapper 2009-11-16 14:24:25 UTC

This bug appears to have been reported against 'rawhide' during the Fedora 12 development cycle.
Changing version to '12'.

More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Comment 2 Orcan Ogetbil 2009-12-12 02:49:49 UTC

I have the same problem with bug 539222 and the review request bug 537363 .

Both compile fine on F-11 but take forever on F-12.

For the latter one I figured that the -O2 flag is what makes the compilations stall. I take -O2 out and the compilation time drops from days to seconds.

Will this be fixed soon?

Comment 3 Jakub Jelinek 2010-01-13 09:03:21 UTC

Please try http://kojipkgs.fedoraproject.org/packages/gcc/4.4.2/24.fc12/

Comment 4 Susi Lehtola 2010-01-13 19:09:34 UTC

Has been compiling for almost 10 hours, so there doesn't seem to be any improvement.

Comment 5 Jakub Jelinek 2010-01-13 19:15:37 UTC

Can you please provide preprocessed source for the file on which it takes so long,
and all gcc options passed to it?
FYI, 4.4.2-24.fc12 isn't in dist-12-build nor dist-f13-build, so if you are just trying to build it in koji, it will use an older gcc.

Comment 6 Susi Lehtola 2010-01-13 21:55:07 UTC

Created attachment 383564 [details]
Preprocessed source

Preprocessed source file.

Comment 7 Susi Lehtola 2010-01-13 21:58:11 UTC

Attachment in comment #6 compiles on my desktop in 40 us with plain "g++ -c", in 19 s with "g++ -O2 -c", but with the standard flags "g++ -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic" it takes a *really* long time.

(In reply to comment #5)
> FYI, 4.4.2-24.fc12 isn't in dist-12-build nor dist-f13-build, so if you are
> just trying to build it in koji, it will use an older gcc.    

Yes, that's why I used mock with a local repo providing the new gcc packages that were picked up for the build.

Comment 8 Jakub Jelinek 2010-01-14 09:24:26 UTC

I guess I'll resurrect the gcc44-max-vartrack-size.patch, but this time with a 50000000 default instead of 5000000.  That way it shouldn't trigger on reasonably sized testcases and will only trigger on these monsters.

Comment 9 Jakub Jelinek 2010-02-11 16:49:32 UTC

gcc-4.4.2-4.fc12 with the above mentioned default vartrack size limit has been released as errata.