I would like to know the *effective* average number of original source files per unified source file, and see how it compares to the *requested* one (which you are adjusting here).
Because many unified directories have a low number of source files, the effective number of sources per unified source will be lower than the requested one. Benoit 2013/12/2 Mike Hommey <m...@glandium.org> > Hi, > > It was already mentioned that unified builds might be causing memory > issues. Since the number of unified sources (16) was decided more or > less arbitrarily (in fact, it's just using whatever was used for > ipdl/webidl builds, which, in turn just used whatever seemed a good > tradeoff between clobber build and incremental build with a single .cpp > changing), it would be good to make an informed decision about the > number of unified sources. > > So, now that mozilla-inbound (finally) builds with different numbers of > unified sources (after fixing bugs 944844 and 945563, but how long > before another problem slips in?[1]), I got some build time numbers on my > machine (linux, old i7, 16GB RAM) to give some perspective: > > Current setup (16): > real 11m7.986s > user 63m48.075s > sys 3m24.677s > Size of the objdir: 3.4GiB > Size of libxul.so: 455MB > > 12 unified sources (requires additional patches for yet-to-be-filed bugs > (yes, plural)): > real 11m18.572s > user 65m24.145s > sys 3m28.113s > Size of the objdir: 3.5GiB > Size of libxul.so: 464MB > > 8 unified sources: > real 11m47.825s > user 68m21.888s > sys 3m39.406s > Size of the objdir: 3.6GiB > Size of libxul.so: 476MB > > 4 unified sources: > real 12m52.630s > user 76m41.208s > sys 4m2.783s > Size of the objdir: 3.9GiB > Size of libxul.so: 509MB > > 2 unified sources: > real 14m59.050s > user 90m44.928s > sys 4m45.418s > Size of the objdir: 4.3GiB > Size of libxul.so: 561MB > > disabled unified sources: > real 18m1.001s > user 113m0.524s > sys 5m57.970s > Size of the objdir: 4.9GiB > Size of libxul.so: 628MB > > Mike > > 1. By the way, those type of bugs that show up at different number of > unified sources are existing type of problems waiting to arise when we > add source files, and running non-unified builds doesn't catch them. > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
