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perf timechart: Add option to limit number of tasks

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Add -n option to specify min. number of tasks to print.

Signed-off-by: Stanislav Fomichev <stfomichev@yandex-team.ru>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1383323151-19810-3-git-send-email-stfomichev@yandex-team.ru
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stanislav Fomichev 2013-11-01 20:25:46 +04:00 committed by Arnaldo Carvalho de Melo
parent 0a8eb275cb
commit 54874e3236
2 changed files with 8 additions and 1 deletions
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4
tools/perf/Documentation/perf-timechart.txt
View File

@ -54,6 +54,10 @@ $ perf timechart
Written 10.2 seconds of trace to output.svg.
-n::
--proc-num::
Print task info for at least given number of tasks.
SEE ALSO
--------
linkperf:perf-record[1]

5
tools/perf/builtin-timechart.c
View File

@ -41,6 +41,7 @@
#define SUPPORT_OLD_POWER_EVENTS 1
#define PWR_EVENT_EXIT -1
static int proc_num = 15;
static unsigned int numcpus;
static u64 min_freq; /* Lowest CPU frequency seen */
@ -955,7 +956,7 @@ static void write_svg_file(const char *filename)
do {
count = determine_display_tasks(thresh);
thresh /= 10;
} while (!process_filter && thresh && count < 15);
} while (!process_filter && thresh && count < proc_num);
open_svg(filename, numcpus, count, first_time, last_time);
@ -1102,6 +1103,8 @@ int cmd_timechart(int argc, const char **argv,
parse_process),
OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
"Look for files with symbols relative to this directory"),
OPT_INTEGER('n', "proc-num", &proc_num,
"min. number of tasks to print"),
OPT_END()
};
const char * const timechart_usage[] = {