Re: [PATCH 08/11] perf tool: precise mode requires exclude_guest

[Arnaldo Carvalho de Melo]

Em Fri, Jul 20, 2012 at 05:25:53PM -0600, David Ahern escreveu:
> PEBS cannot be used with guest mode. If user adds :p modifier set
> exclude_guest as well.

Is this something Intel specific? Or can someone think of an arch where
this limitation wouldn't exist?
 
> 
> Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
> Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Gleb Natapov <gleb@xxxxxxxxxx>
> Link: https://lkml.org/lkml/2012/7/9/264
> ---
>  tools/perf/util/parse-events.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 1aa721d..f34629b 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -653,6 +653,9 @@ int parse_events_modifier(struct list_head *list, char *str)
>  			eH = 0;
>  		} else if (*str == 'p') {
>  			precise++;
> +			/* use of precise requires exclude_guest */
> +			if (!exclude_GH)
> +				eG = 1;
>  		} else
>  			break;
>  
> -- 
> 1.7.10.1
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