[Bug 281765] llvm - ThinLTO never uses more than a single thread by default

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 07 Oct 2024 08:39:03 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281765

Dimitry Andric <dim@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mjg@FreeBSD.org

--- Comment #2 from Dimitry Andric <dim@FreeBSD.org> ---
This is due to src 04bab189b8a54974fcd9530140e4eed6ad137f48, which was
originally submitted by mjg. The reason for this was that lld was using way too
many threads on many-core machines: nowadays just creating "hw.ncpu" threads is
no longer a good default.

That said, now that lld also has a limiter in place, we might want to drop this
patch, which is not really in the right spot, e.g. the general llvm support
library in contrib/llvm-project/llvm/lib/Support/Threading.cpp.

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