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clutter/frame-clock: Store dispatch timings

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Will be used to adjust max render time dynamically.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1762>
This commit is contained in:
Ivan Molodetskikh 2021-01-06 15:44:27 +03:00 committed by Marge Bot
parent 8c4a91ddd6
commit 8d51c5ac55
1 changed files with 48 additions and 0 deletions
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48
clutter/clutter/clutter-frame-clock.c
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@ -33,6 +33,17 @@ enum
static guint signals[N_SIGNALS];
/* An estimate queue holds several int64_t values. Adding a new value to the
* queue overwrites the oldest value.
*/
#define ESTIMATE_QUEUE_LENGTH 16
typedef struct _EstimateQueue
{
int64_t values[ESTIMATE_QUEUE_LENGTH];
int next_index;
} EstimateQueue;
/* Wait 2ms after vblank before starting to draw next frame */
#define SYNC_DELAY_US ms2us (2)
@ -83,6 +94,13 @@ struct _ClutterFrameClock
/* Last KMS buffer submission time. */
int64_t last_flip_time_us;
/* Last few durations between dispatch start and buffer swap. */
EstimateQueue dispatch_to_swap_us;
/* Last few durations between buffer swap and GPU rendering finish. */
EstimateQueue swap_to_rendering_done_us;
/* Last few durations between buffer swap and KMS submission. */
EstimateQueue swap_to_flip_us;
gboolean pending_reschedule;
gboolean pending_reschedule_now;
@ -94,6 +112,14 @@ struct _ClutterFrameClock
G_DEFINE_TYPE (ClutterFrameClock, clutter_frame_clock,
G_TYPE_OBJECT)
static void
estimate_queue_add_value (EstimateQueue *queue,
int64_t value)
{
queue->values[queue->next_index] = value;
queue->next_index = (queue->next_index + 1) % ESTIMATE_QUEUE_LENGTH;
}
float
clutter_frame_clock_get_refresh_rate (ClutterFrameClock *frame_clock)
{
@ -191,6 +217,28 @@ clutter_frame_clock_notify_presented (ClutterFrameClock *frame_clock,
{
frame_clock->last_presentation_time_us = frame_info->presentation_time;
if (frame_info->cpu_time_before_buffer_swap_us != 0 &&
frame_info->gpu_rendering_duration_ns != 0)
{
int64_t dispatch_to_swap_us, swap_to_rendering_done_us, swap_to_flip_us;
dispatch_to_swap_us =
frame_info->cpu_time_before_buffer_swap_us -
frame_clock->last_dispatch_time_us;
swap_to_rendering_done_us =
frame_info->gpu_rendering_duration_ns / 1000;
swap_to_flip_us =
frame_clock->last_flip_time_us -
frame_info->cpu_time_before_buffer_swap_us;
estimate_queue_add_value (&frame_clock->dispatch_to_swap_us,
dispatch_to_swap_us);
estimate_queue_add_value (&frame_clock->swap_to_rendering_done_us,
swap_to_rendering_done_us);
estimate_queue_add_value (&frame_clock->swap_to_flip_us,
swap_to_flip_us);
}
if (frame_info->refresh_rate > 1)
frame_clock->refresh_rate = frame_info->refresh_rate;