[Bug gcov-profile/89307] New: -fprofile-generate binary may be too slow in multithreaded environment due to cache-line conflicts on counters

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89307

            Bug ID: 89307
           Summary: -fprofile-generate binary may be too slow in
                    multithreaded environment due to cache-line conflicts
                    on counters
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: gcov-profile
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hubicka at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

I fill in to track the problem of cacheline conflicts which is also dicussed in
LLVM variant in http://lists.llvm.org/pipermail/llvm-dev/2014-April/072172.html