> Thank you for your answer. I find the most time consuming process in > compiling a file is the optimization of the cgraph nodes (execute > all_passes), > This process is sequence, one node by one node. If we divide the cgraph nodes > into unrelated forest, we can parallel it, is this way feasible?
callgraph generally do not divide into unrelated nodes very well, but -flto=<num cores> should do the trick. It splits program into partitions and compiles them independently. You may need to play with partitioning parameters for best performance. Honza > > Thank you. > > -----????????----- > ??????: Markus Trippelsdorf [mailto:mar...@trippelsdorf.de] > ????????: 2014??7??29?? 16:21 > ??????: Gengyulei (Gengyl) > ????: gcc@gcc.gnu.org > ????: Re: Is there any possibility to parallel compilation in a single file? > > On 2014.07.29 at 08:07 +0000, Gengyulei (Gengyl) wrote: > > Hi: > > > > Is there any possibility to parallel the compilation in a single file > > scope? For large application the compilation time is long, although > > we can parallel the process at the level of files, we still try to > > find a way to accelerate the compilation in a single file. Can we > > change some serial process into > > > > Parallel? Could you give me some advices? Thank you very much. > > Compiling with -flto=<number of cores> and gcc-4.9 should help. > > -- > Markus
