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perf timechart: Show the duration of scheduler delays in the SVG

Browse source 
Given that scheduler latencies are the hot thing nowadays, show the
duration of said latencies in the SVG in text form.

In addition, if the latency is more than 10 msec, pick a brighter
yellow color as a way to point these long delays out.

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: <20090920181353.796f4509@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arjan van de Ven 2009-09-20 18:13:53 +02:00 committed by Ingo Molnar
parent 4f1202c8e6
commit a92fe7b306
3 changed files with 57 additions and 8 deletions
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6
tools/perf/builtin-timechart.c
View file

@ -827,15 +827,15 @@ static void draw_process_bars(void)
continue;
}
svg_box(Y, p->start_time, p->end_time, "process");
svg_box(Y, c->start_time, c->end_time, "process");
sample = c->samples;
while (sample) {
if (sample->type == TYPE_RUNNING)
svg_sample(Y, sample->cpu, sample->start_time, sample->end_time, "sample");
svg_sample(Y, sample->cpu, sample->start_time, sample->end_time);
if (sample->type == TYPE_BLOCKED)
svg_box(Y, sample->start_time, sample->end_time, "blocked");
if (sample->type == TYPE_WAITING)
svg_box(Y, sample->start_time, sample->end_time, "waiting");
svg_waiting(Y, sample->start_time, sample->end_time);
sample = sample->next;
}

56
tools/perf/util/svghelper.c
View file

@ -69,7 +69,8 @@ void open_svg(const char *filename, int cpus, int rows)
fprintf(svgfile, " rect.process2 { fill:rgb(180,180,180); fill-opacity:0.9; stroke-width:0; stroke:rgb( 0, 0, 0); } \n");
fprintf(svgfile, " rect.sample { fill:rgb( 0, 0,255); fill-opacity:0.8; stroke-width:0; stroke:rgb( 0, 0, 0); } \n");
fprintf(svgfile, " rect.blocked { fill:rgb(255, 0, 0); fill-opacity:0.5; stroke-width:0; stroke:rgb( 0, 0, 0); } \n");
fprintf(svgfile, " rect.waiting { fill:rgb(255,255, 0); fill-opacity:0.3; stroke-width:0; stroke:rgb( 0, 0, 0); } \n");
fprintf(svgfile, " rect.waiting { fill:rgb(214,214, 0); fill-opacity:0.3; stroke-width:0; stroke:rgb( 0, 0, 0); } \n");
fprintf(svgfile, " rect.WAITING { fill:rgb(255,214, 48); fill-opacity:0.6; stroke-width:0; stroke:rgb( 0, 0, 0); } \n");
fprintf(svgfile, " rect.cpu { fill:rgb(192,192,192); fill-opacity:0.2; stroke-width:0.5; stroke:rgb(128,128,128); } \n");
fprintf(svgfile, " rect.pstate { fill:rgb(128,128,128); fill-opacity:0.8; stroke-width:0; } \n");
fprintf(svgfile, " rect.c1 { fill:rgb(255,214,214); fill-opacity:0.5; stroke-width:0; } \n");
@ -92,14 +93,14 @@ void svg_box(int Yslot, u64 start, u64 end, const char *type)
time2pixels(start), time2pixels(end)-time2pixels(start), Yslot * SLOT_MULT, SLOT_HEIGHT, type);
}
void svg_sample(int Yslot, int cpu, u64 start, u64 end, const char *type)
void svg_sample(int Yslot, int cpu, u64 start, u64 end)
{
double text_size;
if (!svgfile)
return;
fprintf(svgfile, "<rect x=\"%4.8f\" width=\"%4.8f\" y=\"%4.1f\" height=\"%4.1f\" class=\"%s\"/>\n",
time2pixels(start), time2pixels(end)-time2pixels(start), Yslot * SLOT_MULT, SLOT_HEIGHT, type);
fprintf(svgfile, "<rect x=\"%4.8f\" width=\"%4.8f\" y=\"%4.1f\" height=\"%4.1f\" class=\"sample\"/>\n",
time2pixels(start), time2pixels(end)-time2pixels(start), Yslot * SLOT_MULT, SLOT_HEIGHT);
text_size = (time2pixels(end)-time2pixels(start));
if (cpu > 9)
@ -112,6 +113,53 @@ void svg_sample(int Yslot, int cpu, u64 start, u64 end, const char *type)
}
static char *time_to_string(u64 duration)
{
static char text[80];
text[0] = 0;
if (duration < 1000) /* less than 1 usec */
return text;
if (duration < 1000 * 1000) { /* less than 1 msec */
sprintf(text, "%4.1f us", duration / 1000.0);
return text;
}
sprintf(text, "%4.1f ms", duration / 1000.0 / 1000);
return text;
}
void svg_waiting(int Yslot, u64 start, u64 end)
{
char *text;
const char *style;
double font_size;
if (!svgfile)
return;
style = "waiting";
if (end-start > 10 * 1000000) /* 10 msec */
style = "WAITING";
text = time_to_string(end-start);
font_size = 1.0 * (time2pixels(end)-time2pixels(start)) / strlen(text);
if (font_size > 0.2)
font_size = 0.2;
fprintf(svgfile, "<rect x=\"%4.8f\" width=\"%4.8f\" y=\"%4.1f\" height=\"%4.1f\" class=\"%s\"/>\n",
time2pixels(start), time2pixels(end)-time2pixels(start), Yslot * SLOT_MULT, SLOT_HEIGHT, style);
if (font_size > MIN_TEXT_SIZE)
fprintf(svgfile, "<text transform=\"translate(%1.8f,%1.8f)\" font-size=\"%1.6fpt\">%s</text>\n",
time2pixels(start), Yslot * SLOT_MULT + 2, font_size, text);
}
static char *cpu_model(void)
{
static char cpu_m[255];

3
tools/perf/util/svghelper.h
View file

@ -5,7 +5,8 @@
extern void open_svg(const char *filename, int cpus, int rows);
extern void svg_box(int Yslot, u64 start, u64 end, const char *type);
extern void svg_sample(int Yslot, int cpu, u64 start, u64 end, const char *type);
extern void svg_sample(int Yslot, int cpu, u64 start, u64 end);
extern void svg_waiting(int Yslot, u64 start, u64 end);
extern void svg_cpu_box(int cpu, u64 max_frequency, u64 turbo_frequency);