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Date:      Fri, 02 Nov 2018 23:38:27 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 232153] Processes without explicit cpuset only use half the SMP threads (on a Ryzen)
Message-ID:  <bug-232153-227-8XWSz6pLNN@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-232153-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-232153-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232153

Greg V <greg@unrelenting.technology> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |Not A Bug
             Status|New                         |Closed

--- Comment #3 from Greg V <greg@unrelenting.technology> ---
Hm, looks like the problem just disappeared after I… added a new fan to the
system and went into the UEFI Setup to configure fan speed??

Maybe there was something wrong with ACPI or something and saving the firmware
settings fixed them… Interesting that it didn't affect Windows 10 though.

(In reply to Eric van Gyzen from comment #2)
Desktop Ryzen is not NUMA, it only has one domain. Threadripper has two
domains, EPYC has four, but Ryzen only one. It has some 'NUMA-like' cache
groups as recognized in 'FreeBSD/SMP: 1 package(s) x 2 cache groups x 4 core(s)
x 2 hardware threads', but this is not actual NUMA.

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