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Date: Fri, 18 May 2012 12:18:34 -0400
From: Jung-uk Kim <jkim@FreeBSD.org>
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Cc: freebsd-stable <freebsd-stable@freebsd.org>,
	Sean Bruno <seanbru@yahoo-inc.com>
Subject: Re: [stable 9] broken hwpstate calls
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On 2012-05-18 01:32:09 -0400, Sean Bruno wrote:
> Looks like my AMD box isn't quite working correctly with regards
> to P-states.    I noted this repeating periodically: hwpstate0: set
> freq failed, err 6
> 
> 
> I noted these errors when setting the hwpstate verbose systctl on:
> 
> May 17 22:28:32 Alice kernel: hwpstate0: set freq failed, err 6 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu0 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu0 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu1 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu1 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu2 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu2 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu3 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu3 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu4 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu4 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu5 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu5 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu6 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu6 May
> 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu7 May
> 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu7
> 
> 
> Sean
> 
> ref this machine:  http://forums.pcbsd.org/showthread.php?t=16733

I briefly looked at the dmesg.  You have a Family 15h processor
(Bulldozer with Turbo Core) and I believe it isn't supported (yet).
It won't be too hard to implement, though.

Jung-uk Kim
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