linux-kernel - Re: [PATCH v13 04/14] perf, tools: Allow events with dot

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Date:	Wed, 3 Jun 2015 12:32:04 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:	mingo@...hat.com, ak@...ux.intel.com,
	Michael Ellerman <mpe@...erman.id.au>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	namhyung@...nel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, Robert Richter <rric@...nel.org>
Subject: Re: [PATCH v13 04/14] perf, tools: Allow events with dot

On Tue, Jun 02, 2015 at 10:12:04AM -0700, Sukadev Bhattiprolu wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> The Intel events use a dot to separate event name and unit mask.
> Allow dot in names in the scanner, and remove special handling
> of dot as EOF. Also remove the hack in jevents to replace dot
> with underscore. This way dotted events can be specified
> directly by the user.
> 
> I'm not fully sure this change to the scanner is correct
> (what was the dot special case good for?), but I haven't
> found anything that breaks with it so far at least.

can't see anything either

Robert,
does it ring a bell? seems like you introduced it ;-)

thanks,
jirka


> 
> V2: Add the dot to name too, to handle events outside cpu//
> Acked-by: Namhyung Kim <namhyung@...nel.org>
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
> ---
>  tools/perf/util/parse-events.l |    5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
> index 09e738f..13cef3c 100644
> --- a/tools/perf/util/parse-events.l
> +++ b/tools/perf/util/parse-events.l
> @@ -119,8 +119,8 @@ event		[^,{}/]+
>  num_dec		[0-9]+
>  num_hex		0x[a-fA-F0-9]+
>  num_raw_hex	[a-fA-F0-9]+
> -name		[a-zA-Z_*?][a-zA-Z0-9_*?]*
> -name_minus	[a-zA-Z_*?][a-zA-Z0-9\-_*?]*
> +name		[a-zA-Z_*?][a-zA-Z0-9_*?.]*
> +name_minus	[a-zA-Z_*?][a-zA-Z0-9\-_*?.]*
>  /* If you add a modifier you need to update check_modifier() */
>  modifier_event	[ukhpGHSDI]+
>  modifier_bp	[rwx]{1,3}
> @@ -165,7 +165,6 @@ modifier_bp	[rwx]{1,3}
>  			return PE_EVENT_NAME;
>  		}
>  
> -.		|
>  <<EOF>>		{
>  			BEGIN(INITIAL);
>  			REWIND(0);
> -- 
> 1.7.9.5
> 
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