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Date:      Fri, 29 Sep 2017 20:41:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 218262] [hwpstate] does not set overclocked frequency on AMD Ryzen CPU
Message-ID:  <bug-218262-8-6RasPLZpLE@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-218262-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-218262-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D218262

--- Comment #5 from Greg V <greg@unrelenting.technology> ---
(In reply to Conrad Meyer from comment #3)
Oh. FIDVID is for K7 processors, Family 17h is a newer generation, K8. That=
's
why AMD doesn't mention FIDVID in the docs. Anyway=E2=80=A6=20

This interesting Linux patch https://lwn.net/Articles/443375/ unified AMD a=
nd
Intel p-state handling, they basically just select between functions that w=
rite
to different MSRs. And they do write to 0xc0010062.

---

I tried making the loop longer (1000 iterations) and writing in the loop, s=
till
it doesn't read the right value :(

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