linux-kernel - Re: perf documentation: update Documentation/ABI/testing with missing perf-related files

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Date:	Tue, 16 Jul 2013 10:35:49 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>, mingo@...nel.org,
	acme@...hat.com, Stephane Eranian <eranian@...il.com>
Subject: Re: perf documentation: update Documentation/ABI/testing with
 missing perf-related files

On Mon, Jul 15, 2013 at 05:38:15PM -0400, Vince Weaver wrote:
> 
> Add documentation for various files perf_event creates under
> /sys/bus/event_source/devices/<dev>/
> 
> Signed-off-by: Vince Weaver <vincent.weaver@...ne.edu>
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices b/Documentation/ABI/testing/sysfs-bus-event_source-devices
> new file mode 100644
> index 0000000..ffa2e4b
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices
> @@ -0,0 +1,50 @@
> +What:		/sys/bus/event_source/devices/<dev>/cpumask
> +
> +Date:		2012/09/10
> +		

nit, white space above

> +Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
> +
> +Description:	This value holds a representative core for each
> +		socket in a system.  It is meant to help when
> +		creating a perf_event event for socket-wide events
> +		like uncore and northbridge events.
> +
> +		The format is a comma separated list of cpu numbers,
> +		one for each socket in the system that the PMU in
> +		question can run on.
> +
> +		For example, on a two-socket Sandybridge-EP machine and
> +		the cbox0 uncore the value of the file will be:
> +			0,8
> +		    

nit, white space above

> +
> +
> +What:		/sys/bus/event_source/devices/cpu/rdpmc
> +
> +Date:		2011/11/20
> +
> +Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
> +
> +Description:	Indicates whether a CPU allows userspace "rdpmc"
> +		instructions (unprivileged reads of the performance
> +		counter MSRs).
> +
> +		You can echo 0 to this value to disable user rdpmc
> +		access.
> +
> +
> +
> +What:		/sys/bus/event_source/devices/<dev>/type
> +
> +Date:		2013/01/08
> +
> +Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
> +
> +Description:	This value holds the PMU (Performance Monitor Unit) type
> +		value that is passed into the perf_event_open()
> +		attr:type field when opening an event.
> +
> +		The value is a decimal integer.
> +
> +
> +

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka
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