Bryan Kadzban wrote: > Bruce Dubbs wrote: >> I did some testing tonight using the environment variable >> MAKEFLAGS=-j2. > > I assume you have a dual-core CPU -- have you tried -j3? Any higher?
Chapter 6 binutils: time make -j2 tooldir=/usr 68 seconds time make -j3 tooldir=/usr 60 seconds time make -j2 check 55 seconds time make -j3 check 53 seconds From jhalfs -j1 Chapter 5 binutils 91 seconds Chapter 6 170 seconds Comparing Chapter 6 -j1 170 -j2 133 + make install and other very short ops -j3 123 + make install and other very short ops The only significant speedup seems to be for the 'make' itself. There appears to be less than 10% gain going from -j2 to -j3 Since most packages in LFS are less than 1 SBU, I don't see any real advantage for those. Using -j2 for binutils, gcc, glibc, and maybe gettext would speed things up IF you have a multi-processor or multi-core system AND it's not your first LFS build. Right now I'm leaning against any changes to the book in this area. At most, a mention in General Compilation Instructions is all that is warranted. -- Bruce -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
