Bug#986684: qtwebengine-opensource-src: does not honour DEB_BUILD_OPTIONS=parallel=3 when calling ninja
Hi! On Fri, 9 Apr 2021 at 09:51, Andreas Beckmann wrote: > > Source: qtwebengine-opensource-src > Version: 5.15.3+dfsg-5 > Severity: important > > Hi, > > I'm not sure whether this a an error of qtwebengine-opensource-src or > rather some underlying build tools it uses, please reassign if needed. > I think that happens with other qt packages as well, but I haven't > checked in detail No, if anything it's a bug in [qt]webengine itself. The rest of the packages honor the parameter, I know for sure because I have been neddling with them all my life to be able to build the packages in very limited setups. -- Lisandro Damián Nicanor Pérez Meyer http://perezmeyer.com.ar/ http://perezmeyer.blogspot.com/
Bug#986684: qtwebengine-opensource-src: does not honour DEB_BUILD_OPTIONS=parallel=3 when calling ninja
Source: qtwebengine-opensource-src Version: 5.15.3+dfsg-5 Severity: important Hi, I'm not sure whether this a an error of qtwebengine-opensource-src or rather some underlying build tools it uses, please reassign if needed. I think that happens with other qt packages as well, but I haven't checked in detail While rebuilding experimental I just found again some excessive load: 1234 3192 0.0 0.0 2560 1336 pts/18 SN+ 08:24 0:00 /bin/sh 1234 1938 0.0 0.0 15220 10196 pts/18 SN+ 11:56 0:00 /usr/bin/perl /usr/bin/dpkg-buildpackage -us -uc 1234 3977 0.0 0.0 2708 1932 pts/18 SN+ 12:28 0:00 /usr/bin/make -f debian/rules build 1234 4485 0.0 0.0 13856 9892 pts/18 SN+ 12:28 0:00 /usr/bin/perl /usr/bin/dh build --with pkgkde_symbolshelper 1234 6 0.0 0.0 2844 1928 pts/18 SN+ 12:28 0:00 /usr/bin/make -f debian/rules override_dh_auto_build-arch 1234 12149 0.0 0.0 13760 9980 pts/18 SN+ 12:28 0:00 /usr/bin/perl /usr/bin/dh_auto_build -- -Onone 1234 12325 0.0 0.0 4124 3408 pts/18 SN+ 12:28 0:00 make -j3 -Onone 1234 12438 0.0 0.0 2568 536 pts/18 SN+ 12:28 0:00 /bin/sh -c cd src/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /build/qtwebengine-opensource-src-5.15.3+dfsg/src/src.pro QT_BUILD_PARTS+=tests 'QMAKE_EXTRA_ARGS+=-proprietary-cod 1234 12459 0.0 0.0 4316 3456 pts/18 SN+ 12:28 0:00 make -f Makefile 1234 14230 0.0 0.0 2568 540 pts/18 SN+ 12:28 0:00 /bin/sh -c cd core/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /build/qtwebengine-opensource-src-5.15.3+dfsg/src/core/core.pro QT_BUILD_PARTS+=tests 'QMAKE_EXTRA_ARGS+=-propriet 1234 14236 0.0 0.0 4148 3420 pts/18 SN+ 12:28 0:00 make -f Makefile 1234 15330 0.0 0.0 2568 524 pts/18 SN+ 12:28 0:00 /bin/sh -c ( test -e Makefile.gn_run || /usr/lib/qt5/bin/qmake -o Makefile.gn_run /build/qtwebengine-opensource-src-5.15.3+dfsg/src/core/gn_run.pro QT_BUILD_PARTS+=tests 'QMAKE_EXTRA_ARGS+=-prop 1234 15343 0.0 0.0 4116 3332 pts/18 SN+ 12:28 0:00 make -f Makefile.gn_run 1234 4179 0.2 0.4 278576 269500 pts/18 SN+ 12:28 0:12 ninja -v -C /build/qtwebengine-opensource-src-5.15.3+dfsg/src/core/release QtWebEngineCore ninja(4179)─┬─sh(7105)───g++(7108)─┬─as(7110) │ └─cc1plus(7109) ├─sh(10106)───g++(10110)─┬─as(10114) │└─cc1plus(10112) ├─sh(11878)───g++(11880)─┬─as(11884) │└─cc1plus(11883) ├─sh(12229)───g++(12230)─┬─as(12232) │└─cc1plus(12231) ├─sh(12532)───g++(12533)─┬─as(12535) │└─cc1plus(12534) ├─sh(14164)───g++(14165)─┬─as(14173) │└─cc1plus(14169) ├─sh(14519)───g++(14521)─┬─as(14526) │└─cc1plus(14525) ├─sh(14843)───g++(14844)─┬─as(14847) │└─cc1plus(14845) ├─sh(15375)───g++(15377)─┬─as(15380) │└─cc1plus(15378) ├─sh(16167)───g++(16168)─┬─as(16171) │└─cc1plus(16169) ├─sh(17887)───g++(17891)─┬─as(17896) │└─cc1plus(17892) ├─sh(17894)───g++(17895)─┬─as(17904) │└─cc1plus(17903) ├─sh(18172)───g++(18173)─┬─as(18176) │└─cc1plus(18174) ├─sh(19554)───g++(19556)─┬─as(19559) │└─cc1plus(19557) ├─sh(20054)───g++(20055)─┬─as(20059) │└─cc1plus(20057) ├─sh(20247)───g++(20248)─┬─as(20253) │└─cc1plus(20249) ├─sh(21800)───g++(21801)─┬─as(21807) │└─cc1plus(21804) └─sh(21931)───g++(21933)─┬─as(21942) └─cc1plus(21937) The build starts nicely honoring the DEB_BUILD_OPTIONS=parallel=3 until ninja gets invoked without a limiting -j option, so it forks off $(nproc)+x processes (nproc is 16, but there are 18 forks). And 18 g++ compilations each taking 1GB+ of memory is not a nice background load. Andreas
