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Date:      Thu, 7 Dec 2017 13:26:48 -0500
From:      Jung-uk Kim <jkim@FreeBSD.org>
To:        Alexey Dokuchaev <danfe@FreeBSD.org>
Cc:        cem@freebsd.org, svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers <src-committers@freebsd.org>
Subject:   Re: svn commit: r326383 - head/sys/x86/cpufreq
Message-ID:  <db23e689-d338-bc95-63c3-ce066f42a525@FreeBSD.org>
In-Reply-To: <20171207100345.GA59559@FreeBSD.org>
References:  <201711300140.vAU1e7dC001292@repo.freebsd.org> <CAG6CVpVyooSG3rPG1GvqRZHT9Lyh48JBQb_tFf2-CzWmfW8JyQ@mail.gmail.com> <e412e02d-8b52-221f-1f3c-8c300b1b3067@FreeBSD.org> <CAG6CVpVtm%2BUUw1zxxGXEjKT8MqL8ZjqSaQh4=_0NJbFmcbQxVw@mail.gmail.com> <af56c6b4-d964-4a19-5647-3778eb0cc508@FreeBSD.org> <20171207100345.GA59559@FreeBSD.org>

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From: Jung-uk Kim <jkim@FreeBSD.org>
To: Alexey Dokuchaev <danfe@FreeBSD.org>
Cc: cem@freebsd.org, svn-src-head@freebsd.org, svn-src-all@freebsd.org,
 src-committers <src-committers@freebsd.org>
Message-ID: <db23e689-d338-bc95-63c3-ce066f42a525@FreeBSD.org>
Subject: Re: svn commit: r326383 - head/sys/x86/cpufreq
References: <201711300140.vAU1e7dC001292@repo.freebsd.org>
 <CAG6CVpVyooSG3rPG1GvqRZHT9Lyh48JBQb_tFf2-CzWmfW8JyQ@mail.gmail.com>
 <e412e02d-8b52-221f-1f3c-8c300b1b3067@FreeBSD.org>
 <CAG6CVpVtm+UUw1zxxGXEjKT8MqL8ZjqSaQh4=_0NJbFmcbQxVw@mail.gmail.com>
 <af56c6b4-d964-4a19-5647-3778eb0cc508@FreeBSD.org>
 <20171207100345.GA59559@FreeBSD.org>
In-Reply-To: <20171207100345.GA59559@FreeBSD.org>

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On 12/07/2017 05:03, Alexey Dokuchaev wrote:
> On Thu, Nov 30, 2017 at 03:08:49PM -0500, Jung-uk Kim wrote:
>> ...
>> Probably.  However, I am just trying to fix my FX-8350 and A10-6800 an=
d
>> I don't have Zen processors to verify the MSRs are actually working on=

>> those CPUs.
>=20
> Ah, that's so lovely, thanks Jung-uk; I feel that our support for AMD
> fam. 15h CPUs is lacking.  E.g. only four P-states are reported for my
> A8-5550M, while it supports boosted P-states per BKDG, and reading MSRs=

> directly via `sysutils/amdmsrtweaker' reports eight of them (P0 .. P7),=

> with three turbo P-states P0 P1 P2.

You don't trust your BIOS? ;-)

Unless SSDT is unavailable or broken, we should use ACPI tables first.

> Since you have A10-6800 you might try to reproduce what I see here with=

> A8-5550M.

I'll take a look when I find some free time.

Jung-uk Kim


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