On Tue, Mar 18, 2014 at 4:09 PM, Martin Liška <mli...@suse.cz> wrote: > Hello, > I've been compiling Chromium with LTO and I noticed that WPA stream_out > forks and do parallel: > http://gcc.gnu.org/ml/gcc-patches/2013-11/msg02621.html. > > I am unable to fit in 16GB memory: ld uses about 8GB and lto1 about 6GB. > When WPA start to fork, memory consumption increases so that lto1 is killed. > I would appreciate an --param option to disable this WPA fork. The number of > forks is taken from build system (-flto=9) which is fine for ltrans phase, > because LD releases aforementioned 8GB. > > What do you think about that?
Hmm, what does cause the memory increase? Are you eventually doing garbage collection after the forks in any of the processes? (just add a global flag may_not_gc_collect and set it to true before the first fork and assert in ggc_collect () that this flag isn't set) Richard. > Thanks, > Martin
