linux-kernel - AMD FX-4130 part only runs at 2.6/3.4GHz

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Message-ID: <20130809214255.GA5893@amd.pavel.ucw.cz>
Date:	Fri, 9 Aug 2013 23:42:55 +0200
From:	Pavel Machek <pavel@....cz>
To:	kernel list <linux-kernel@...r.kernel.org>, rjw@...k.pl,
	viresh.kumar@...aro.org, cpufreq@...r.kernel.org,
	linux-pm@...r.kernel.org
Cc:	andreas.herrmann3@....com
Subject: AMD FX-4130 part only runs at 2.6/3.4GHz

Hi!

I have 

DMI: Gigabyte Technology Co., Ltd. GA-78LMT-S2P/GA-78LMT-S2P, BIOS F3 10/18/2012

mainboard and AMD FX-4130 processor.

processor : 3
vendor_id : AuthenticAMD
cpu family  : 21
model	      : 1
model name    : AMD FX(tm)-4130 Quad-Core Processor            
stepping      : 2
microcode     : 0x6000629
cpu MHz	      	: 1400.000
cache size	: 2048 KB

...but it seems to run slower than it should. According to box, stock
frequency should be 3.8GHz, with 3.9GHz turbo, but it only goes to
3.4GHz (and seems to only go there in "turbo" mode -- not all cores at
once.)

Kernel is:

Linux version 3.11.0-rc2 (pavel@Elf) (gcc version 4.4.5 (Debian
4.4.5-8) ) #320 SMP Fri Aug 9 23:22:58 CEST 2013

cpufreq says:

pavel@Elf:~$ cat
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
3400000 2800000 2600000 1800000 1400000 
pavel@Elf:~$ 

Suspicious dmesg:

ACPI Warning: \_PR_.C000._PSS: SubPackage[0,1] - suspicious power
dissipation values (20130517/nsrepair2-710)
acpi-cpufreq: overriding BIOS provided _PSD data
ACPI Warning: \_PR_.C001._PSS: SubPackage[0,1] - suspicious power
dissipation values (20130517/nsrepair2-710)
ACPI Warning: \_PR_.C002._PSS: SubPackage[0,1] - suspicious power
dissipation values (20130517/nsrepair2-710)
ACPI Warning: \_PR_.C003._PSS: SubPackage[0,1] - suspicious power
dissipation values (20130517/nsrepair2-710)
ALSA device list:
  #0: HDA ATI SB at 0xfe024000 irq 16
  #1: HD-Audio Generic at 0xfdffc000 irq 19

I can manually tweak multiplier in the BIOS to get to 3812 (or so)
MHz, but the machine does not seem stable in that setting.

Any idea what is going on?

Thanks,
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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