perf timechart: Add a power-only mode
For doing work on the Linux power management components, I need to
make long (30+ seconds) traces. Currently, this then results in a
HUGE svg file, with mostly process data that isn't interesting.
This patch adds a --power-only mode to perf timechart that only
outputs the CPU power section of the SVG; this significantly
reduces the size of the SVG file, making even 30+ second traces
viewable with inkscape.
As a minor tweak for the same effect, the minimum text size is
decreased; current inkscape cannot zoom in deep enough to show text
this small, but it reduces inkscape compute time.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: peterz@infradead.org
LKML-Reference: <20090924154013.0675ab71@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 4405681..702d8fe 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -46,6 +46,8 @@
static u64 first_time, last_time;
+static int power_only;
+
static struct perf_header *header;
@@ -547,7 +549,7 @@
u64 cpu;
struct power_event *pwr;
- for (cpu = 0; cpu < numcpus; cpu++) {
+ for (cpu = 0; cpu <= numcpus; cpu++) {
pwr = malloc(sizeof(struct power_event));
if (!pwr)
return;
@@ -871,7 +873,7 @@
/* no exit marker, task kept running to the end */
if (p->end_time == 0)
p->end_time = last_time;
- if (p->total_time >= threshold)
+ if (p->total_time >= threshold && !power_only)
p->display = 1;
c = p->all;
@@ -882,7 +884,7 @@
if (c->start_time == 1)
c->start_time = first_time;
- if (c->total_time >= threshold) {
+ if (c->total_time >= threshold && !power_only) {
c->display = 1;
count++;
}
@@ -1134,6 +1136,8 @@
"output file name"),
OPT_INTEGER('w', "width", &svg_page_width,
"page width"),
+ OPT_BOOLEAN('p', "power-only", &power_only,
+ "output power data only"),
OPT_END()
};