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Change profiling code to use median instead of average

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This commit is contained in:
o9000 2016-10-08 18:17:27 +02:00
parent 2c42a78725
commit 278a915ba4
1 changed files with 92 additions and 9 deletions
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101
src/tint.c
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@ -80,6 +80,82 @@ timeout *detect_compositor_timer = NULL;
int detect_compositor_timer_counter = 0;
gboolean debug_fps = FALSE;
float *fps_distribution = NULL;
void create_fps_distribution()
{
// measure FPS with resolution:
// 0-59: 1 (60 samples)
// 60-199: 10 (14)
// 200-1,999: 25 (72)
// 1k-19,999: 1000 (19)
// 20x+: inf (1)
// => 166 samples
if (fps_distribution)
return;
fps_distribution = calloc(170, sizeof(float));
}
void cleanup_fps_distribution()
{
free(fps_distribution);
fps_distribution = NULL;
}
void sample_fps(double fps)
{
int fps_rounded = (int)(fps + 0.5);
int i = 1;
if (fps_rounded < 60) {
i += fps_rounded;
} else {
i += 60;
if (fps_rounded < 200) {
i += (fps_rounded - 60) / 10;
} else {
i += 14;
if (fps_rounded < 2000) {
i += (fps_rounded - 200) / 25;
} else {
i += 72;
if (fps_rounded < 20000) {
i += (fps_rounded - 2000) / 1000;
} else {
i += 20;
}
}
}
}
// fprintf(stderr, "fps = %.0f => i = %d\n", fps, i);
fps_distribution[i] += 1.;
fps_distribution[0] += 1.;
}
void fps_compute_stats(double *low, double *median, double *high, double *samples)
{
*median = *low = *high = *samples = -1;
if (!fps_distribution || fps_distribution[0] < 1)
return;
float total = fps_distribution[0];
*samples = (double) fps_distribution[0];
float cum_low = 0.05f * total;
float cum_median = 0.5f * total;
float cum_high = 0.95f * total;
float cum = 0;
for (int i = 1; i <= 166; i++) {
double value =
(i < 60) ? i : (i < 74) ? (60 + (i - 60) * 10) : (i < 146) ? (200 + (i - 74) * 25)
: (i < 165) ? (2000 + (i - 146) * 1000) : 20000;
// fprintf(stderr, "%6.0f (i = %3d) : %.0f | ", value, i, (double)fps_distribution[i]);
cum += fps_distribution[i];
if (*low < 0 && cum >= cum_low)
*low = value;
if (*median < 0 && cum >= cum_median)
*median = value;
if (*high < 0 && cum >= cum_high)
*high = value;
}
}
void detect_compositor(void *arg)
{
@ -379,6 +455,8 @@ void init(int argc, char *argv[])
debug_geometry = getenv("DEBUG_GEOMETRY") != NULL;
debug_gradients = getenv("DEBUG_GRADIENTS") != NULL;
debug_fps = getenv("DEBUG_FPS") != NULL;
if (debug_fps)
create_fps_distribution();
}
static int sigchild_pipe_valid = FALSE;
@ -553,6 +631,7 @@ void cleanup()
}
uevent_cleanup();
cleanup_fps_distribution();
}
void get_snapshot(const char *path)
@ -1567,7 +1646,6 @@ start:
double ts_event_processed = 0;
double ts_render_finished = 0;
double ts_flush_finished = 0;
double fps_sum = 0, fps_count = 0;
gboolean first_render = TRUE;
while (1) {
if (panel_refresh) {
@ -1590,10 +1668,10 @@ start:
if (panel->temp_pmap)
XFreePixmap(server.display, panel->temp_pmap);
panel->temp_pmap = XCreatePixmap(server.display,
server.root_win,
panel->area.width,
panel->area.height,
server.depth);
server.root_win,
panel->area.width,
panel->area.height,
server.depth);
render_panel(panel);
}
@ -1663,15 +1741,20 @@ start:
ts_flush_finished = get_time();
double period = ts_flush_finished - ts_event_read;
double fps = 1.0 / period;
sample_fps(fps);
double proc_ratio = (ts_event_processed - ts_event_read) / period;
double render_ratio = (ts_render_finished - ts_event_processed) / period;
double flush_ratio = (ts_flush_finished - ts_render_finished) / period;
fps_sum += fps;
fps_count += 1;
double fps_low, fps_median, fps_high, fps_samples;
fps_compute_stats(&fps_low, &fps_median, &fps_high, &fps_samples);
fprintf(stderr,
BLUE "fps = %.0f (avg %.0f) : processing %.0f%%, rendering %.0f%%, flushing %.0f%%" RESET "\n",
BLUE "fps = %.0f (low %.0f, med %.0f, high %.0f, samples %.0f) : processing %.0f%%, rendering %.0f%%, "
"flushing %.0f%%" RESET "\n",
fps,
fps_sum / fps_count,
fps_low,
fps_median,
fps_high,
fps_samples,
proc_ratio * 100,
render_ratio * 100,
flush_ratio * 100);