Date: Mon, 11 Nov 2013 18:02:00 -0800 From: Sean Bruno <sean_bruno@yahoo.com> To: Jung-uk Kim <jkim@FreeBSD.org> Cc: freebsd-acpi <freebsd-acpi@freebsd.org> Subject: Re: Problems with amd FX 8 core and freq scaling Message-ID: <1384221720.1748.53.camel@powernoodle.corp.yahoo.com> In-Reply-To: <52815060.9050406@FreeBSD.org> References: <5281358D.1010406@FreeBSD.org> <5281374F.7080802@FreeBSD.org> <CAJ-VmomgCyjX_tR7bLzw6s8jSJJvfB=5fXFCj6UgdKFz6rW-FQ@mail.gmail.com> <52814CB2.6050204@FreeBSD.org> <52815060.9050406@FreeBSD.org>
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[-- Attachment #1 --] On Mon, 2013-11-11 at 16:47 -0500, Jung-uk Kim wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 2013-11-11 16:31:30 -0500, Jung-uk Kim wrote: > > On 2013-11-11 15:26:58 -0500, Adrian Chadd wrote: > >> On 11 November 2013 12:00, Jung-uk Kim <jkim@freebsd.org> wrote: > >>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > >>> > >>> On 2013-11-11 13:16:47 -0500, Nicholas McKenzie wrote: > >>>> But wouldn't this just disable frequency scaling and the > >>>> whole point of powerd? > >>> > >>> No. acpi_throttle (and p4tcc) controls T-state. "Frequency > >>> scaling" should be done by changing P-state. > > > >> Right. > > > >> IIRC, T-state is just for emergency temperature throttling. It > >> shouldn't be used outside of that. > > > > > >>>>> There have been a number of reports of throttling causing > >>>>> crashes. This setting does not prevent powerd from > >>>>> adjusting your CPU's clock, it just disables some arcane > >>>>> feature which pre-dates the modern power management > >>>>> methods. > > > >> .. did anyone ever figure out why crashes would be caused by > >> T-state adjustment? > > > > My memory is vague but I think it was not able to reject a broken > > FADT or _PTC table, or something like that. > > Just in case, here I attached the uncommitted (and untested) patch. > > Jung-uk Kim > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.22 (FreeBSD) > > iQEcBAEBAgAGBQJSgVBgAAoJEHyflib82/FGACsIAJGDQGOYYO8dxvtQMw4BBnzl > BNbFkvalvHOzaSezJz+A4R0zeIMvkfJtu0Gb8qiTkxJF+REREFo6a7lmzC7hOMwa > 7PzRRRG34rtmnnHJro3Wc5qQwc1zBbmyFgYEJ45AkmIc62mpp9f0sZyNA1+aSpau > 2sY6H0dXktapc2pLR1uNyxfUlr1tRhoabceGSlGLYiB583FrMsvASkaTnuWQ2IfI > gytrJBKjMihu60KlwKauzUOVDrEuN3J/B1y7V/TrTXmcFmWgL9Wdw/gC7ToRdloT > JdF812Duj/xYvyoNEwkz1Rm0NT5r1ZTYqwMvkOPuMfK7IWX0O9UFO8VG+QnJXhU= > =/d/E > -----END PGP SIGNATURE----- > _______________________________________________ > freebsd-acpi@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-acpi > To unsubscribe, send any mail to "freebsd-acpi-unsubscribe@freebsd.org" Let me test this on my fx-8150 tonight. What should I look for as a test failure/success? sean [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (FreeBSD) iQEcBAABAgAGBQJSgYwYAAoJEBkJRdwI6BaHG/QH/1u5cNNcy/CrM8Y1JNWG8guS 76NEW2XQjI0tF4THSqr7FlY6cGPjAZ3jY9hIUcXVmacZLrqYn8zhvwiz7UVCGiMK CMDVne8c3Dqr2FVjCFjrpHLhQIZsVuuYCeb4IgR9SrKPt4KMu1YK1zBYILEWZd+n Itqq/n9o9AQlFSHQgrrHBoOsm1+HsoWqlknn9nYiXIijYxxsqU4xzSORt/vW1UCF m9oJQMCcuTde5U4+0BzLgsEmht2X3z5re2YQXkfEggBYLowvXJPSAEmfveNF1YAd pIiKe73CYl46UBKUMN5uh2A++fXu5BYAhZrWCT0mFOU9IRQrfZHYawS/r9psUq4= =vWd2 -----END PGP SIGNATURE-----
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