linux-kernel - Re: [PATCH 11/13] perf tools: Add overhead/overhead

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Date:	Thu, 7 Jan 2016 20:17:17 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Noel Grandin <noelgrandin@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 11/13] perf tools: Add overhead/overhead_children keys
 defaults via string

On Thu, Jan 07, 2016 at 10:14:08AM +0100, Jiri Olsa wrote:
> We currently set 'overhead' and 'overhead_children'
> as default sort keys within perf_hpp__init function
> by directly adding into the sort list.
> 
> This patch adds 'overhead' and 'overhead_children'
> in text form into sort_keys and let them be added
> by standard sort dimension interface.
> 
> We need to eliminate dirrect sort_list additions to
> b able to add support for hists specific sort keys.
> 
> Link: http://lkml.kernel.org/n/tip-thk6jds1pi6j2jy82ywnxniy@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung


> ---
>  tools/perf/ui/hist.c   | 12 ------------
>  tools/perf/util/sort.c | 39 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 39 insertions(+), 12 deletions(-)
> 
> diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
> index 8263c0eb9fb5..bf2a66e254ea 100644
> --- a/tools/perf/ui/hist.c
> +++ b/tools/perf/ui/hist.c
> @@ -443,7 +443,6 @@ LIST_HEAD(perf_hpp__sort_list);
>  
>  void perf_hpp__init(void)
>  {
> -	struct list_head *list;
>  	int i;
>  
>  	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
> @@ -484,17 +483,6 @@ void perf_hpp__init(void)
>  
>  	if (symbol_conf.show_total_period)
>  		hpp_dimension__add_output(PERF_HPP__PERIOD);
> -
> -	/* prepend overhead field for backward compatiblity.  */
> -	list = &perf_hpp__format[PERF_HPP__OVERHEAD].sort_list;
> -	if (list_empty(list))
> -		list_add(list, &perf_hpp__sort_list);
> -
> -	if (symbol_conf.cumulate_callchain) {
> -		list = &perf_hpp__format[PERF_HPP__OVERHEAD_ACC].sort_list;
> -		if (list_empty(list))
> -			list_add(list, &perf_hpp__sort_list);
> -	}
>  }
>  
>  void perf_hpp__column_register(struct perf_hpp_fmt *format)
> diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> index 04e2a5cb19e3..ec722346e6ff 100644
> --- a/tools/perf/util/sort.c
> +++ b/tools/perf/util/sort.c
> @@ -2252,6 +2252,34 @@ static int setup_sort_order(struct perf_evlist *evlist)
>  	return 0;
>  }
>  
> +/*
> + * Adds 'pre,' prefix into 'str' is 'pre' is
> + * not already part of 'str'.
> + */
> +static char *prefix_if_not_in(const char *pre, char *str)
> +{
> +	char *n;
> +
> +	if (!str || strstr(str, pre))
> +		return str;
> +
> +	if (asprintf(&n, "%s,%s", pre, str) < 0)
> +		return NULL;
> +
> +	free(str);
> +	return n;
> +}
> +
> +static char *setup_overhead(char *keys)
> +{
> +	keys = prefix_if_not_in("overhead", keys);
> +
> +	if (symbol_conf.cumulate_callchain)
> +		keys = prefix_if_not_in("overhead_children", keys);
> +
> +	return keys;
> +}
> +
>  static int __setup_sorting(struct perf_evlist *evlist)
>  {
>  	char *tmp, *tok, *str;
> @@ -2281,6 +2309,17 @@ static int __setup_sorting(struct perf_evlist *evlist)
>  		return -ENOMEM;
>  	}
>  
> +	/*
> +	 * Prepend overhead fields for backward compatibility.
> +	 */
> +	if (!is_strict_order(field_order)) {
> +		str = setup_overhead(str);
> +		if (str == NULL) {
> +			error("Not enough memory to setup overhead keys");
> +			return -ENOMEM;
> +		}
> +	}
> +
>  	for (tok = strtok_r(str, ", ", &tmp);
>  			tok; tok = strtok_r(NULL, ", ", &tmp)) {
>  		ret = sort_dimension__add(tok, evlist);
> -- 
> 2.4.3
> 
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