https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221029

--- Comment #75 from Mark Millard <mar...@dsl-only.net> ---
(In reply to Mark Millard from comment #74)

I got a lang/ghc build that completed on
the Ryzen:

# pkg search ghc
ghc-8.0.2_1                    Compiler for the functional language Haskell

This used as a context:

sysctl kern.sched.balance=0
sysctl kern.sched.steal_idle=0

So I'm starting the test of a build attempt
in a context with:

sysctl kern.sched.balance=1
sysctl kern.sched.steal_idle=0

also for:

PARALLEL_JOBS=1
ALLOW_MAKE_JOBS=no

and ALLOW_MAKE_JOBS_PACKAGES not having a match
for lang/ghc

Not that as the system has only general/basic
background activities besides the build that:
kern.sched.balance=1 vs. kern.sched.balance=0
likely makes little difference in my context
for this test: no need to migrate to a less busy
thread.

As stands this new build is well past where the
combination:

sysctl kern.sched.balance=1
sysctl kern.sched.steal_idle=1

was getting. I'd not be surprise if it completes
unless something forces a HW-thread migration to
a less busy hw thread (or should I write "core"?).

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