On 12.02.2016 00:05, Nicolai Hähnle wrote: > On 10.02.2016 22:59, Dave Airlie wrote: >> >> So in Fedora rawhide we are now building llvm 3.7.1 into the lots of >> little shared libraries format. > > Barring all the other problems, are you sure this is a good idea? I > remember somebody mentioning that at least LLVM's own test suite runs > much slower in this build configuration.
I didn't measure the LLVM testsuite wrt this, but I did measure that the split shared libraries increase the runtime of a single piglit test by about 0.02s, which for a full piglit run adds up to about 400 CPU core seconds, i.e. about 6.667 CPU core minutes. > I don't know whether this is "only" due to a slower startup time in > the dynamic linker or also due to slower compile times at runtime, but > it's probably worth measuring. I didn't investigate it in detail, but I assume it's the former. I don't know of any other significant difference between the two cases I measured. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
