linux-kernel - Re: [PATCH V3 07/25] perf auxtrace: Add option to synthesize events for transactions

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Message-ID: <20150428130200.GE22258@krava.redhat.com>
Date:	Tue, 28 Apr 2015 15:02:00 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH V3 07/25] perf auxtrace: Add option to synthesize events
 for transactions

On Fri, Apr 24, 2015 at 10:29:49PM +0300, Adrian Hunter wrote:
> Add AUX area tracing option 'x' to synthesize events for
> transactions. This will be used by Intel PT to synthesize
> an event record for each TSX start, commit or abort.
> 
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
>  tools/perf/Documentation/perf-inject.txt | 9 +++++----
>  tools/perf/Documentation/perf-report.txt | 9 +++++----
>  tools/perf/Documentation/perf-script.txt | 9 +++++----
>  tools/perf/util/auxtrace.c               | 5 ++++-
>  tools/perf/util/auxtrace.h               | 2 ++
>  5 files changed, 21 insertions(+), 13 deletions(-)
> 
> diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt
> index bb1f655..b876ae3 100644
> --- a/tools/perf/Documentation/perf-inject.txt
> +++ b/tools/perf/Documentation/perf-inject.txt
> @@ -52,11 +52,12 @@ OPTIONS
>  		b	synthesize branches events
>  		c	synthesize branches events (calls only)
>  		r	synthesize branches events (returns only)
> +		x	synthesize transactions events
>  		e	synthesize error events
>  		d	create a debug log
> -		g	synthesize a call chain for instructions events
> +		g	synthesize a call chain (use with i or x)
>  
> -	The default is all events i.e. the same as --itrace=ibe
> +	The default is all events i.e. the same as --itrace=ibxe
>  
>  	In addition, the period (default 100000) for instructions events
>  	can be specified in units of:
> @@ -67,8 +68,8 @@ OPTIONS
>  		us	microseconds
>  		ns	nanoseconds (default)
>  
> -	Also the call chain size (default 16, max. 1024) for instructions
> -	events can be specified.
> +	Also the call chain size (default 16, max. 1024) for instructions or
> +	transactions events can be specified.

Do you want to carry on with updating 3 places of the same doc?
I wonder it'd be better to have perf-auxtrace.txt for auxtrace details.

jirka
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