Re: [PATCH 4/9] perf tools: Add a precise event qualifier

[Namhyung Kim]

On Thu,  9 May 2013 15:32:19 +0200, Jiri Olsa wrote:
> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
>
> Add a precise qualifier, like cpu/event=0x3c,precise=1/
>
> This is needed so that the kernel can request enabling PEBS
> for TSX events. The parser bails out on any sysfs parse errors,
> so this is needed in any case to handle any event on the TSX
> perf kernel.
[SNIP]
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -568,6 +568,12 @@ do {								\
>  	case PARSE_EVENTS__TERM_TYPE_NAME:
>  		CHECK_TYPE_VAL(STR);
>  		break;
> +	case PARSE_EVENTS__TERM_TYPE_PRECISE:
> +		CHECK_TYPE_VAL(NUM);
> +		if ((unsigned)term->val.num > 2)

Shouldn't it be 3 as we technically allow the 'ppp' modifier?  Although
there's no cpu suppports precise=3 currently, things can be changed. :)

Thanks,
Namhyung

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