[Bug bootstrap/96794] New: --with-build-config=bootstrap-lto-lean with --enable-link-mutex leads to poor LTRANS utilization

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96794

            Bug ID: 96794
           Summary: --with-build-config=bootstrap-lto-lean with
                    --enable-link-mutex leads to poor LTRANS utilization
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

As seen
here:https://gist.githubusercontent.com/marxin/223890df4d8d8e490b6b2918b77dacad/raw/7e0363da60dcddbfde4ab68fa3be755515166297/gcc-10-with-zstd.svg

each blocking linking of a GCC front-end leads to a wasted jobserver worker.