linux-kernel - Re: [PATCH] perf report: Fix no branch type statistics report issue

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Message-ID: <20200313192425.GD9917@kernel.org>
Date:   Fri, 13 Mar 2020 16:24:25 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf report: Fix no branch type statistics report issue

Em Fri, Mar 13, 2020 at 09:46:07PM +0800, Jin Yao escreveu:
> Previously we could get the report of branch type statistics.
> 
> For example,
> 
> perf record -j any,save_type ...
> perf report --stdio
> 
>   #
>   # Branch Statistics:
>   #
>   COND_FWD:  40.6%
>   COND_BWD:   4.1%
>   CROSS_4K:  24.7%
>   CROSS_2M:  12.3%
>       COND:  44.7%
>     UNCOND:   0.0%
>        IND:   6.1%
>       CALL:  24.5%
>        RET:  24.7%
> 
> But now for the recent perf, it can't report the branch type statistics.
> 
> It's a regression issue caused by commit 40c39e304641
> ("perf report: Fix a no annotate browser displayed issue"),
> which only counts the branch type statistics for browser mode.
> 
> This patch moves the branch_type_count() outside of ui__has_annotation()
> checking, then branch type statistics can work for stdio mode.
> 
> Fixes: 40c39e304641 ("perf report: Fix a no annotate browser displayed issue")

Thanks, tested before/after, matches description, applied.

- Arnaldo
 
> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> ---
>  tools/perf/builtin-report.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index d7c905f7520f..5f4045df76f4 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -186,24 +186,23 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter,
>  {
>  	struct hist_entry *he = iter->he;
>  	struct report *rep = arg;
> -	struct branch_info *bi;
> +	struct branch_info *bi = he->branch_info;
>  	struct perf_sample *sample = iter->sample;
>  	struct evsel *evsel = iter->evsel;
>  	int err;
>  
> +	branch_type_count(&rep->brtype_stat, &bi->flags,
> +			  bi->from.addr, bi->to.addr);
> +
>  	if (!ui__has_annotation() && !rep->symbol_ipc)
>  		return 0;
>  
> -	bi = he->branch_info;
>  	err = addr_map_symbol__inc_samples(&bi->from, sample, evsel);
>  	if (err)
>  		goto out;
>  
>  	err = addr_map_symbol__inc_samples(&bi->to, sample, evsel);
>  
> -	branch_type_count(&rep->brtype_stat, &bi->flags,
> -			  bi->from.addr, bi->to.addr);
> -
>  out:
>  	return err;
>  }
> -- 
> 2.17.1
> 

-- 

- Arnaldo