linux-kernel - Re: [PATCH] intel_ips: quieten "power or thermal limit exceeded" messages

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Date:	Sat, 28 Aug 2010 09:52:35 -0300
From:	Cesar Eduardo Barros <cesarb@...arb.net>
To:	Joe Perches <joe@...ches.com>
CC:	Jesse Barnes <jbarnes@...tuousgeek.org>, Matthew Garrett,
	mjg@...hat.com, platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] intel_ips: quieten "power or thermal limit exceeded"
 messages

You seem to have dropped the CC list by accident, adding it back.

Em 28-08-2010 08:15, Joe Perches escreveu:
> On Sat, 2010-08-28 at 07:46 -0300, Cesar Eduardo Barros wrote:
>> If I read the code with your previous patch correctly, show_turbo_limits
>> will never be called if poll_turbo_status is false but no interrupt
>> happens. And we know no interrupt happened (at least not with nonzero
>> register values), because the interrupt handler does two dev_info()
>> right at the beginning. So the limits could still be the ones initially
>> set at ips_probe().
>>
>> I will try to enable dev_dbg() later and see what it prints.
>
> or add:
>
> diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c
> index 9024480..450ea44 100644
> --- a/drivers/platform/x86/intel_ips.c
> +++ b/drivers/platform/x86/intel_ips.c
> @@ -1600,6 +1600,7 @@ static int ips_probe(struct pci_dev *dev, const struct pci_device_id *id)
>   		ips->second_cpu = true;
>
>   	update_turbo_limits(ips);
> +	show_turbo_limits(ips, __func__);
>   	dev_dbg(&dev->dev, "max cpu power clamp: %dW\n",
>   		ips->mcp_power_limit / 10);
>   	dev_dbg(&dev->dev, "max core power clamp: %dW\n",

Here it is:

intel ips 0000:00:1f.6: Warning: CPU TDP doesn't match expected value 
(found 25, expected 35)
intel ips 0000:00:1f.6: PCI INT C -> GSI 18 (level, low) -> IRQ 18
intel ips 0000:00:1f.6: show_turbo_limits:ips_probe cte:1 gte:1 cpt:0 
mpl:65535 mtl:65535 mpl:65535
intel ips 0000:00:1f.6: IPS driver initialized, MCP temp limit 65535
intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:8004 + 
mch:25353039
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4841
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5283
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5586
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6077
intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:5871 + mch:64538
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5466
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 8589
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5744
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4859
intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:4834 + mch:62385
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4874
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5356
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6557
intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:7589 + mch:59343
intel ips 0000:00:1f.6: MCP power limit 65535 exceeded: cpu:5536 + mch:60020
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6676
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4401
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5634
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4038
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4700
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5086
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4930
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4697
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5034
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 5381
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4417
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 6839
intel ips 0000:00:1f.6: CPU power limit 0 exceeded: 4787

-- 
Cesar Eduardo Barros
cesarb@...arb.net
cesar.barros@...il.com
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