perf timechart: Show the name of the waker/wakee in timechart

Timechart currently shows thin green lines for sending or receiving
wakeups. This patch also prints (in a very small font) the name of
the process that is being woken/wakes up this process.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20090920181328.68baa978@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 3 deletions

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 58d737ec8f5e..3f45b8b24e3d 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -752,6 +752,7 @@ static void draw_wakeups(void)
         we = wake_events;
         while (we) {
                 int from = 0, to = 0;
+                char *task_from = NULL, *task_to = NULL;
 
                 /* locate the column of the waker and wakee */
                 p = all_data;
@@ -760,10 +761,14 @@ static void draw_wakeups(void)
                                 c = p->all;
                                 while (c) {
                                         if (c->Y && c->start_time <= we->time && c->end_time >= we->time) {
-                                                if (p->pid == we->waker)
+                                                if (p->pid == we->waker) {
                                                         from = c->Y;
-                                                if (p->pid == we->wakee)
+                                                        task_from = c->comm;
+                                                }
+                                                if (p->pid == we->wakee) {
                                                         to = c->Y;
+                                                        task_to = c->comm;
+                                                }
                                         }
                                         c = c->next;
                                 }
@@ -776,7 +781,7 @@ static void draw_wakeups(void)
                 else if (from && to && abs(from - to) == 1)
                         svg_wakeline(we->time, from, to);
                 else
-                        svg_partial_wakeline(we->time, from, to);
+                        svg_partial_wakeline(we->time, from, task_from, to, task_to);
                 we = we->next;
         }
 }