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>

3 files changed, 30 insertions, 11 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;
         }
 }
diff --git a/tools/perf/util/svghelper.c b/tools/perf/util/svghelper.c
index b0fcecdf378d..9f70fa8e7643 100644
--- a/tools/perf/util/svghelper.c
+++ b/tools/perf/util/svghelper.c
@@ -242,7 +242,7 @@ void svg_pstate(int cpu, u64 start, u64 end, u64 freq)
 }
 
 
-void svg_partial_wakeline(u64 start, int row1, int row2)
+void svg_partial_wakeline(u64 start, int row1, char *desc1, int row2, char *desc2)
 {
         double height;
 
@@ -251,21 +251,35 @@ void svg_partial_wakeline(u64 start, int row1, int row2)
 
 
         if (row1 < row2) {
-                if (row1)
+                if (row1) {
                         fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
                                 time2pixels(start), row1 * SLOT_MULT + SLOT_HEIGHT,  time2pixels(start), row1 * SLOT_MULT + SLOT_HEIGHT + SLOT_MULT/32);
-
-                if (row2)
+                        if (desc2)
+                                fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &gt;</text>\n",
+                                        time2pixels(start), row1 * SLOT_MULT + SLOT_HEIGHT + SLOT_HEIGHT/48, desc2);
+                }
+                if (row2) {
                         fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
                                 time2pixels(start), row2 * SLOT_MULT - SLOT_MULT/32,  time2pixels(start), row2 * SLOT_MULT);
+                        if (desc1)
+                                fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &gt;</text>\n",
+                                        time2pixels(start), row2 * SLOT_MULT - SLOT_MULT/32, desc1);
+                }
         } else {
-                if (row2)
+                if (row2) {
                         fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
                                 time2pixels(start), row2 * SLOT_MULT + SLOT_HEIGHT,  time2pixels(start), row2 * SLOT_MULT + SLOT_HEIGHT + SLOT_MULT/32);
-
-                if (row1)
+                        if (desc1)
+                                fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &lt;</text>\n",
+                                        time2pixels(start), row2 * SLOT_MULT + SLOT_HEIGHT + SLOT_MULT/48, desc1);
+                }
+                if (row1) {
                         fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
                                 time2pixels(start), row1 * SLOT_MULT - SLOT_MULT/32,  time2pixels(start), row1 * SLOT_MULT);
+                        if (desc2)
+                                fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &lt;</text>\n",
+                                        time2pixels(start), row1 * SLOT_MULT - SLOT_HEIGHT/32, desc2);
+                }
         }
         height = row1 * SLOT_MULT;
         if (row2 > row1)
diff --git a/tools/perf/util/svghelper.h b/tools/perf/util/svghelper.h
index ad79b5dc53de..8260a7e6e314 100644
--- a/tools/perf/util/svghelper.h
+++ b/tools/perf/util/svghelper.h
@@ -17,7 +17,7 @@ extern void svg_pstate(int cpu, u64 start, u64 end, u64 freq);
 extern void svg_time_grid(u64 start, u64 end);
 extern void svg_legenda(void);
 extern void svg_wakeline(u64 start, int row1, int row2);
-extern void svg_partial_wakeline(u64 start, int row1, int row2);
+extern void svg_partial_wakeline(u64 start, int row1, char *desc1, int row2, char *desc2);
 extern void svg_interrupt(u64 start, int row);
 extern void svg_text(int Yslot, u64 start, const char *text);
 extern void svg_close(void);