To my > >>>It looks like ghc-6.12.1 reports erroneous time profiling -- > >>>when the Main module of the project is made under -O. > >>>[..] > >>>This is for ghc-6.12.1 made from source for Debian Linux and > >>>i386-like. > >>> [] > >The key combination > > ghc $dmCpOpt -prof --make Main > >shows 95% for eLoop, > >and adding -O to this line shows 0% for eLoop, independently on > >presence of -auto-all in this line > >(the whole library is made under -O -prof). > > > >Yes, I recall that the effect may be of inlining.
Simon Marlow wrote on Thu, Feb 04, 2010 > Inlining should not in general affect the shape of the profile. I can't > say much else here without seeing the specific code. Finally, by setting -O0 -prof I have found "who of top-levels takes most of time" -- hopefully, the same functions will occur for -O. I do not know, maybe, this is a known bug (Simon writes, there exists some report). Anyway, it is important to debug profiling -- to making unnecessary any irregular tricks with -inline-not. Dear GHC team, if I put my project to a public place, would you find out what is the effect there about -O -prof ? Although the whole program is large, but probably, the very example with `main' + Complete.complete + a single SCC, is simple for you to detect the effect source. Regards, ----------------- Serge Mechveliani mech...@botik.ru _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
