Matt Rogers wrote: >On Friday 31 March 2006 04:20, Thiago Macieira wrote: >> Alexander Neundorf wrote: >> >> Even without the flat build and starting compilation of the next >> >> target's sources while the current one hasn't finished linking >> >> (which means the compile farm starves for a while), cmake building >> >> of kdelibs is faster than the equivalent unsermake build. >> > >> >Really ? >> >Nice to hear :-) >> >Do you have numbers ? >> >> No, I don't have numbers. This is just feeling. >> >> I'll try to build now and will post the numbers. > >the first dashboard runs i did took an average 45 minutes to compile. > build logs from kde 3.5 kdesvn-build runs said it took an average of 50 > minutes to compile kdelibs. > >this is a bit like comparing apples to oranges, but hopefully it's close >enough for a good comparison. > >the one thing that doesn't seem to be as fast with cmake is moc and uic >generation, but that is probably only my perception. :)
This was the build time on make -kj25:
321.67user 105.39system 11:08.05elapsed 63%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (209major+7874919minor)pagefaults 0swaps
Load average was around 8-9 most of the time and the compilation
succeeded.
For unsemake --compile-jobs=25 -k, this was the build time:
294.79user 150.16system 11:03.03elapsed 67%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (110major+13870575minor)pagefaults 0swaps
Load average was around 9-11, but the compilation failed (it went as far
as linking libDCOP.la). This is the first error that I noticed (I might
have let others slip by):
/home/tjmaciei/src/kde4/KDE/kdelibs/kabc/kab/../addressbook.h:29:23:
error: addressee.h: No such file or directory
To get another comparison, I compiled KDE Libs 3.5:
665.60user 273.01system 22:38.50elapsed 69%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (256major+38426195minor)pagefaults 0swaps
Load average between 9-11 too.
That's TWICE as long. There's some linking happening before, but ~11
minutes into the build, it does only linking. So that's another 11
minutes linking!
(The compile farm was never saturated in any case.)
--
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
thiago.macieira (AT) trolltech.com Trolltech AS
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