Using AutoFDO is one way. For PGO, you may want to to try using __gcov_dump interface to explicitly control the timing and order of the profile dump --- i.e., invoke __gcov_dump in main process after work processes exit and before the main process exits.
David On Mon, Jun 1, 2015 at 8:08 PM, Pengfei Yuan <0xcool...@gmail.com> wrote: > Hi, > > I am trying PGO on Nginx, which has a main process and several worker > processes. > I find that the collected profile data files only contain information > for the main process, which is probably a data race (the main process > exits immediately after worker processes exit). > How can I solve this problem? Should I switch to the sampling-based AutoFDO? > > Regards, > Yuan, Pengfei
