perf timechart: Add support for displaying only tasks related data

In order to make SVG smaller and faster to browse add possibility to
switch off power related information with -T switch.

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/1383323151-19810-5-git-send-email-stfomichev@yandex-team.ru
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 13 insertions, 1 deletions

diff --git a/tools/perf/Documentation/perf-timechart.txt b/tools/perf/Documentation/perf-timechart.txt
index 4373144a43b4..d8441894d9ec 100644
--- a/tools/perf/Documentation/perf-timechart.txt
+++ b/tools/perf/Documentation/perf-timechart.txt
@@ -35,6 +35,9 @@ OPTIONS
 -P::
 --power-only::
         Only output the CPU power section of the diagram
+-T::
+--tasks-only::
+        Don't output processor state transitions
 -p::
 --process::
         Select the processes to display, by name or PID
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 6410c9ead9e2..b3f175a30d94 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -51,6 +51,7 @@ static u64		turbo_frequency;
 static u64              first_time, last_time;
 
 static bool             power_only;
+static bool             tasks_only;
 
 
 struct per_pid;
@@ -971,7 +972,8 @@ static void write_svg_file(const char *filename)
         draw_cpu_usage();
         if (proc_num)
                 draw_process_bars();
-        draw_c_p_states();
+        if (!tasks_only)
+                draw_c_p_states();
         if (proc_num)
                 draw_wakeups();
 
@@ -1102,6 +1104,8 @@ int cmd_timechart(int argc, const char **argv,
         OPT_STRING('o', "output", &output_name, "file", "output file name"),
         OPT_INTEGER('w', "width", &svg_page_width, "page width"),
         OPT_BOOLEAN('P', "power-only", &power_only, "output power data only"),
+        OPT_BOOLEAN('T', "tasks-only", &tasks_only,
+                    "output processes data only"),
         OPT_CALLBACK('p', "process", NULL, "process",
                       "process selector. Pass a pid or process name.",
                        parse_process),
@@ -1119,6 +1123,11 @@ int cmd_timechart(int argc, const char **argv,
         argc = parse_options(argc, argv, options, timechart_usage,
                         PARSE_OPT_STOP_AT_NON_OPTION);
 
+        if (power_only && tasks_only) {
+                pr_err("-P and -T options cannot be used at the same time.\n");
+                return -1;
+        }
+
         symbol__init();
 
         if (argc && !strncmp(argv[0], "rec", 3))