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Date:   Mon, 20 Feb 2017 16:08:01 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@....com
Subject: Re: [PATCH 3/6] perf report: Add -q/--quiet option

Em Fri, Feb 17, 2017 at 05:17:39PM +0900, Namhyung Kim escreveu:
> The -q/--quiet option is to suppress any message.  Sometimes users just
> want to see the numbers and it can be used for that case.



#
# (Tip: Customize output of perf script with: perf script -F event,ip,sym)
#
(END)


This still appears, at the end :-\

- Arnaldo
 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/Documentation/perf-report.txt |  4 ++++
>  tools/perf/builtin-report.c              | 21 ++++++++++++++++-----
>  2 files changed, 20 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
> index f2914f03ae7b..c04cc0647c16 100644
> --- a/tools/perf/Documentation/perf-report.txt
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -25,6 +25,10 @@ OPTIONS
>  --verbose::
>          Be more verbose. (show symbol address, etc)
>  
> +-q::
> +--quiet::
> +	Do not show any message.  (Suppress -v)
> +
>  -n::
>  --show-nr-samples::
>  	Show the number of samples for each symbol
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index dbd7fa028861..0a88670e56f3 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -320,6 +320,9 @@ static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report
>  	size_t size = sizeof(buf);
>  	int socked_id = hists->socket_filter;
>  
> +	if (quiet)
> +		return 0;
> +
>  	if (symbol_conf.filter_relative) {
>  		nr_samples = hists->stats.nr_non_filtered_samples;
>  		nr_events = hists->stats.total_non_filtered_period;
> @@ -372,7 +375,11 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
>  {
>  	struct perf_evsel *pos;
>  
> -	fprintf(stdout, "#\n# Total Lost Samples: %" PRIu64 "\n#\n", evlist->stats.total_lost_samples);
> +	if (!quiet) {
> +		fprintf(stdout, "#\n# Total Lost Samples: %" PRIu64 "\n#\n",
> +			evlist->stats.total_lost_samples);
> +	}
> +
>  	evlist__for_each_entry(evlist, pos) {
>  		struct hists *hists = evsel__hists(pos);
>  		const char *evname = perf_evsel__name(pos);
> @@ -382,7 +389,7 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
>  			continue;
>  
>  		hists__fprintf_nr_sample_events(hists, rep, evname, stdout);
> -		hists__fprintf(hists, true, 0, 0, rep->min_percent, stdout,
> +		hists__fprintf(hists, !quiet, 0, 0, rep->min_percent, stdout,
>  			       symbol_conf.use_callchain);
>  		fprintf(stdout, "\n\n");
>  	}
> @@ -716,6 +723,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
>  		    "input file name"),
>  	OPT_INCR('v', "verbose", &verbose,
>  		    "be more verbose (show symbol address, etc)"),
> +	OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
>  	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
>  		    "dump raw trace in ASCII"),
>  	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
> @@ -863,6 +871,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
>  		report.symbol_filter_str = argv[0];
>  	}
>  
> +	if (quiet)
> +		perf_quiet_option();
> +
>  	if (symbol_conf.vmlinux_name &&
>  	    access(symbol_conf.vmlinux_name, R_OK)) {
>  		pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name);
> @@ -983,14 +994,14 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
>  		goto error;
>  	}
>  
> -	if (report.header || report.header_only) {
> +	if ((report.header || report.header_only) && !quiet) {
>  		perf_session__fprintf_info(session, stdout,
>  					   report.show_full_info);
>  		if (report.header_only) {
>  			ret = 0;
>  			goto error;
>  		}
> -	} else if (use_browser == 0) {
> +	} else if (use_browser == 0 && !quiet) {
>  		fputs("# To display the perf.data header info, please use --header/--header-only options.\n#\n",
>  		      stdout);
>  	}
> @@ -1009,7 +1020,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
>   		 * providing it only in verbose mode not to bloat too
>   		 * much struct symbol.
>   		 */
> -		if (verbose) {
> +		if (verbose > 0) {
>  			/*
>  			 * XXX: Need to provide a less kludgy way to ask for
>  			 * more space per symbol, the u32 is for the index on
> -- 
> 2.11.1

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