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c/main: Try to detect when we miss frames

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This commit is contained in:
Jakob Bornecrantz 2023-05-02 13:12:41 +01:00
parent 73f68fd111
commit 04d5942fa5
1 changed files with 19 additions and 0 deletions
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19
src/xrt/compositor/main/comp_renderer.c
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@ -2027,6 +2027,7 @@ comp_renderer_draw(struct comp_renderer *r)
// Save for timestamps below.
uint64_t frame_id = c->frame.rendering.id;
uint64_t desired_present_time_ns = c->frame.rendering.desired_present_time_ns;
// Clear the rendered frame.
comp_frame_clear_locked(&c->frame.rendering);
@ -2076,7 +2077,25 @@ comp_renderer_draw(struct comp_renderer *r)
* Only do this if we are ready.
*/
if (comp_target_check_ready(r->c->target)) {
// For estimating frame misses.
uint64_t then_ns = os_monotonic_get_ns();
// Do the acquire
renderer_acquire_swapchain_image(r);
// How long did it take?
uint64_t now_ns = os_monotonic_get_ns();
/*
* Make sure we at least waited 1ms before warning. Then check
* if we are more then 1ms behind when we wanted to present.
*/
if (then_ns + U_TIME_1MS_IN_NS < now_ns && //
desired_present_time_ns + U_TIME_1MS_IN_NS < now_ns) {
uint64_t diff_ns = now_ns - desired_present_time_ns;
double diff_ms_f = time_ns_to_ms_f(diff_ns);
COMP_WARN(c, "Compositor probably missed frame by %.2fms", diff_ms_f);
}
}
comp_target_update_timings(ct);