[PATCH 2/7] perf timechart: add option to limit number of tasks

[Stanislav Fomichev]

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

Signed-off-by: Stanislav Fomichev <stfomichev@xxxxxxxxxxxxxx>
---
 tools/perf/Documentation/perf-timechart.txt | 4 ++++
 tools/perf/builtin-timechart.c              | 5 ++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-timechart.txt b/tools/perf/Documentation/perf-timechart.txt
index 1632b0efc757..919cbe9ce428 100644
--- a/tools/perf/Documentation/perf-timechart.txt
+++ b/tools/perf/Documentation/perf-timechart.txt
@@ -41,6 +41,10 @@ OPTIONS
 --symfs=<directory>::
         Look for files with symbols relative to this directory.
 
+-n::
+--proc-num::
+        Print task info for at least given number of tasks.
+
 SEE ALSO
 --------
 linkperf:perf-record[1]
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index c68ed44c2319..51a5532b3382 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -40,6 +40,7 @@
 #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 */
@@ -954,7 +955,7 @@ 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);
 
@@ -1096,6 +1097,8 @@ 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[] = {
-- 
1.8.3.2

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