linux-kernel - Re: [PATCH] Add ACPI and power trace points for laptop overheating

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Date:	Fri, 18 May 2012 21:27:29 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-acpi@...r.kernel.org, lenb@...nel.org,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] Add ACPI and power trace points for laptop overheating

Hi Andi

On Thu, May 17, 2012 at 10:08 PM, Andi Kleen <andi@...stfloor.org> wrote:
> From: Andi Kleen <ak@...ux.intel.com>
>
> Add trace points for ACPI power events which are important for a laptop's
> thermal: acpi throttling/pstate, ec communication, GPU overheating. Useful
> for understanding the thermal behaviour of laptops on the thermal edge.
>
> The generic power events have gpu_limit, overtemp_pstate and overtemp_throttling
> I added ACPI specific new events for EC desynchronization (which
> seems to be a common problem, but is entirely uninstrumented currently),
> and can lead to lost throttling events.
>
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  Documentation/trace/events-acpi.txt  |   13 ++++++++
>  Documentation/trace/events-power.txt |   20 +++++++++++++
>  drivers/acpi/Makefile                |    1 +
>  drivers/acpi/acpi-trace.c            |    7 ++++
>  drivers/acpi/ec.c                    |    4 ++
>  drivers/acpi/processor_thermal.c     |    4 ++
>  drivers/platform/x86/intel_ips.c     |    4 ++
>  include/trace/events/power.h         |   51 ++++++++++++++++++++++++++++++++++
>  kernel/trace/power-traces.c          |    3 ++
>  9 files changed, 107 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/trace/events-acpi.txt
>  create mode 100644 drivers/acpi/acpi-trace.c
>
[...]
> --- a/drivers/acpi/Makefile
> +++ b/drivers/acpi/Makefile
> @@ -73,3 +73,4 @@ obj-$(CONFIG_ACPI_PROCESSOR_AGGREGATOR) += acpi_pad.o
>  obj-$(CONFIG_ACPI_IPMI)                += acpi_ipmi.o
>
>  obj-$(CONFIG_ACPI_APEI)                += apei/
> +obj-$(CONFIG_TRACEPOINTS)      += acpi-trace.o
> \ No newline at end of file

For what the newline is?
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