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From: "matz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/96794] --with-build-config=bootstrap-lto-lean with
 --enable-link-mutex leads to poor LTRANS utilization
Date: Wed, 26 Aug 2020 12:23:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96794

--- Comment #9 from Michael Matz <matz at gcc dot gnu.org> ---
We could also punt: when enable-link-mutex we could artificially up the job
number for make to account for the waiting link steps.  I.e. when normally =
-jN
was given, the link step could be done under -j(N + nr-language - 1).  That
would lead to the
nr-of-languages-1 job server tokens taken up by the sleeping link steps to =
be
accounted for, and hence the (single running) link step still be able to us=
e N
threads/processes in parallel.=