Commit a4a4d0a7 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
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perf report: Add --stats option to display quick data statistics 



Add --stats option to display quick data statistics of event numbers,
without any further processing, like the one at the end of the perf
report -D command.

  $ perf report --stat

  Aggregated stats:
             TOTAL events:       4566
              MMAP events:        113
              LOST events:         19
              COMM events:          3
              FORK events:        400
            SAMPLE events:       3315
             MMAP2 events:         32
    FINISHED_ROUND events:        681
        THREAD_MAP events:          1
           CPU_MAP events:          1
         TIME_CONV events:          1

I found this useful when hunting lost events for another change.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180107160356.28203-12-jolsa@kernel.org


[ Rename it to --stats, plural ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 075ca1eb

tools/perf/Documentation/perf-report.txt

+4 −0
Original line number Diff line number Diff line
@@ -457,6 +457,10 @@ include::itrace.txt[] 
	will be printed. Each entry is function name or file/line. Enabled by

	default, disable with --no-inline.



--stats::

	Display overall events statistics without any further processing.

	(like the one at the end of the perf report -D command)



include::callchain-overhead-calculation.txt[]



SEE ALSO

tools/perf/builtin-report.c

+25 −1
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ struct report { 
	bool			show_threads;

	bool			inverted_callchain;

	bool			mem_mode;

	bool			stats_mode;

	bool			header;

	bool			header_only;

	bool			nonany_branch_mode;
@@ -588,6 +589,20 @@ static void report__output_resort(struct report *rep) 
	ui_progress__finish();

}



static void stats_setup(struct report *rep)

{

	memset(&rep->tool, 0, sizeof(rep->tool));

	rep->tool.no_warn = true;

}



static int stats_print(struct report *rep)

{

	struct perf_session *session = rep->session;



	perf_session__fprintf_nr_events(session, stdout);

	return 0;

}



static int __cmd_report(struct report *rep)

{

	int ret;
@@ -619,12 +634,18 @@ static int __cmd_report(struct report *rep) 
		return ret;

	}



	if (rep->stats_mode)

		stats_setup(rep);



	ret = perf_session__process_events(session);

	if (ret) {

		ui__error("failed to process sample\n");

		return ret;

	}



	if (rep->stats_mode)

		return stats_print(rep);



	report__warn_kptr_restrict(rep);



	evlist__for_each_entry(session->evlist, pos)
@@ -781,6 +802,7 @@ int cmd_report(int argc, const char **argv) 
	OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),

	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,

		    "dump raw trace in ASCII"),

	OPT_BOOLEAN(0, "stats", &report.stats_mode, "Display event stats"),

	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,

		   "file", "vmlinux pathname"),

	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
@@ -1042,6 +1064,8 @@ repeat: 
		report.tool.show_feat_hdr = SHOW_FEAT_HEADER;

	if (report.show_full_info)

		report.tool.show_feat_hdr = SHOW_FEAT_HEADER_FULL_INFO;

	if (report.stats_mode)

		use_browser = 0;



	if (strcmp(input_name, "-") != 0)

		setup_browser(true);
@@ -1064,7 +1088,7 @@ repeat: 
			ret = 0;

			goto error;

		}

	} else if (use_browser == 0 && !quiet) {

	} else if (use_browser == 0 && !quiet && !report.stats_mode) {

		fputs("# To display the perf.data header info, please use --header/--header-only options.\n#\n",

		      stdout);

	}

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