linux-kernel - Re: MCE/Package power limit notification

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Message-ID: <20111129231909.2c9ed5da@x220.fritz.box>
Date:	Tue, 29 Nov 2011 23:19:09 +0100
From:	Udo Steinberg <udo@...ervisor.org>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	"Luck, Tony" <tony.luck@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: MCE/Package power limit notification

Hi Fenghua,

On Tue, 29 Nov 2011 13:43:43 -0800 Fenghua Yu (FY) wrote:

FY> Could you please check counters in /sys/devices/system/cpu/cpu#/thermal_throttle
FY> and see which counters report the thermal events?

cpu0/thermal_throttle/core_power_limit_count : 0
cpu0/thermal_throttle/core_throttle_count : 102536
cpu0/thermal_throttle/package_power_limit_count : 384
cpu0/thermal_throttle/package_throttle_count : 183429
cpu1/thermal_throttle/core_power_limit_count : 0
cpu1/thermal_throttle/core_throttle_count : 102536
cpu1/thermal_throttle/package_power_limit_count : 384
cpu1/thermal_throttle/package_throttle_count : 183429
cpu2/thermal_throttle/core_power_limit_count : 0
cpu2/thermal_throttle/core_throttle_count : 104859
cpu2/thermal_throttle/package_power_limit_count : 384
cpu2/thermal_throttle/package_throttle_count : 183429
cpu3/thermal_throttle/core_power_limit_count : 0
cpu3/thermal_throttle/core_throttle_count : 104859
cpu3/thermal_throttle/package_power_limit_count : 384
cpu3/thermal_throttle/package_throttle_count : 183429

FY> The thought of the patch is to remove the errors in mcelog and report the errors
FY> in respective counters. Therefore, the events are not reported as scary hardware
FY> issues but are still captured in counters.

I'm still seeing the following messages:

CPU2: Package temperature above threshold, cpu clock throttled (total events = 146147)
CPU3: Package temperature above threshold, cpu clock throttled (total events = 146147)
CPU1: Package temperature above threshold, cpu clock throttled (total events = 146147)
CPU0: Package temperature above threshold, cpu clock throttled (total events = 146147)
CPU0: Package temperature/speed normal
CPU2: Package temperature/speed normal
CPU1: Package temperature/speed normal
CPU3: Package temperature/speed normal
CPU3: Core temperature above threshold, cpu clock throttled (total events = 81740)
CPU2: Core temperature above threshold, cpu clock throttled (total events = 81740)
CPU2: Core temperature/speed normal
CPU3: Core temperature/speed normal
[Hardware Error]: Machine check events logged

FY> I think BIOS/firmware sets up power limit or thermal throttle incorrectly and
FY> triggers events incorrectly. You may try updated BIOS to see if the events go
FY> away.

I'm running the latest BIOS on my Lenovo Thinkpad X220. Someone should talk
to Lenovo about getting this fixed. My machine reports:

DMI: LENOVO 4290W4H/4290W4H, BIOS 8DET54WW (1.24 ) 10/18/2011

Cheers,

	- Udo

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