linux-kernel - Re: [PATCH v4 4/6] perf report: Show branch info in callchain entry for stdio mode

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Date:   Mon, 14 Nov 2016 13:34:48 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     jolsa@...nel.org, Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com
Subject: Re: [PATCH v4 4/6] perf report: Show branch info in callchain entry
 for stdio mode

Em Mon, Oct 31, 2016 at 09:19:52AM +0800, Jin Yao escreveu:
> If the branch is 100% predicated then the "predicated" is hide.

"predicated"?  Changing this to "predicted".

Also changing "is hide" to "is hidden".

- Arnaldo

> Similarly, if there is no branch tsx abort, the "abort" is hide.
> There is only cycles shown (cycle is supported on skylake platform,
> older platform would be 0).
> 
> If no iterations, the "iterations" is hide.
> 
> For example:
> 
> |--29.93%--main div.c:39 (predicted:50.6%, cycles:1, iterations:18)
> |          main div.c:44 (predicted:50.6%, cycles:1)
> |          |
> |           --22.69%--main div.c:42 (cycles:2, iterations:17)
> |                     compute_flag div.c:28 (cycles:2)
> |                     |
> |                      --10.52%--compute_flag div.c:27 (cycles:1)
> |                                rand rand.c:28 (cycles:1)
> |                                rand rand.c:28 (cycles:1)
> |                                __random random.c:298 (cycles:1)
> |                                __random random.c:297 (cycles:1)
> |                                __random random.c:295 (cycles:1)
> |                                __random random.c:295 (cycles:1)
> |                                __random random.c:295 (cycles:1)
> |                                __random random.c:295 (cycles:6)
> 
> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> ---
>  tools/perf/ui/stdio/hist.c | 35 +++++++++++++++++++++++++++++++----
>  1 file changed, 31 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
> index 89d8441..668f4ae 100644
> --- a/tools/perf/ui/stdio/hist.c
> +++ b/tools/perf/ui/stdio/hist.c
> @@ -41,7 +41,9 @@ static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_node *node,
>  {
>  	int i;
>  	size_t ret = 0;
> -	char bf[1024];
> +	char bf[1024], *alloc_str = NULL;
> +	char buf[64];
> +	const char *str;
>  
>  	ret += callchain__fprintf_left_margin(fp, left_margin);
>  	for (i = 0; i < depth; i++) {
> @@ -56,8 +58,26 @@ static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_node *node,
>  		} else
>  			ret += fprintf(fp, "%s", "          ");
>  	}
> -	fputs(callchain_list__sym_name(chain, bf, sizeof(bf), false), fp);
> +
> +	str = callchain_list__sym_name(chain, bf, sizeof(bf), false);
> +
> +	if (symbol_conf.show_branchflag_count) {
> +		if (!period)
> +			callchain_list_counts__printf_value(node, chain, NULL,
> +							    buf, sizeof(buf));
> +		else
> +			callchain_list_counts__printf_value(NULL, chain, NULL,
> +							    buf, sizeof(buf));
> +
> +		if (asprintf(&alloc_str, "%s%s", str, buf) < 0)
> +			str = "Not enough memory!";
> +		else
> +			str = alloc_str;
> +	}
> +
> +	fputs(str, fp);
q>  	fputc('\n', fp);
> +	free(alloc_str);
>  	return ret;
>  }
>  
> @@ -219,8 +239,15 @@ static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
>  			} else
>  				ret += callchain__fprintf_left_margin(fp, left_margin);
>  
> -			ret += fprintf(fp, "%s\n", callchain_list__sym_name(chain, bf, sizeof(bf),
> -							false));
> +			ret += fprintf(fp, "%s",
> +				       callchain_list__sym_name(chain, bf,
> +								sizeof(bf),
> +								false));
> +
> +			if (symbol_conf.show_branchflag_count)
> +				ret += callchain_list_counts__printf_value(
> +						NULL, chain, fp, NULL, 0);
> +			ret += fprintf(fp, "\n");
>  
>  			if (++entries_printed == callchain_param.print_limit)
>  				break;
> -- 
> 2.7.4