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compositor: Upgrade repaint timer precision to nsec

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We can now use 1ns as the minimum timer duration instead of 1ms.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2025-10-22 10:53:12 -05:00
parent 37acb0c0fd
commit 0a76cb86ca
1 changed files with 9 additions and 9 deletions
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18
libweston/compositor.c
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@ -3907,20 +3907,20 @@ output_repaint_timer_arm(struct weston_compositor *compositor)
bool any_should_repaint = false; bool any_should_repaint = false;
struct timespec now; struct timespec now;
struct itimerspec next_time_its = { 0 }; struct itimerspec next_time_its = { 0 };
int64_t msec_to_next = INT64_MAX; int64_t nsec_to_next = INT64_MAX;
weston_compositor_read_presentation_clock(compositor, &now); weston_compositor_read_presentation_clock(compositor, &now);
wl_list_for_each(output, &compositor->output_list, link) { wl_list_for_each(output, &compositor->output_list, link) {
int64_t msec_to_this; int64_t nsec_to_this;
if (output->repaint_status != REPAINT_SCHEDULED) if (output->repaint_status != REPAINT_SCHEDULED)
continue; continue;
msec_to_this = timespec_sub_to_msec(&output->next_repaint, nsec_to_this = timespec_sub_to_nsec(&output->next_repaint,
&now); &now);
if (!any_should_repaint || msec_to_this < msec_to_next) if (!any_should_repaint || nsec_to_this < nsec_to_next)
msec_to_next = msec_to_this; nsec_to_next = nsec_to_this;
any_should_repaint = true; any_should_repaint = true;
} }
@ -3928,16 +3928,16 @@ output_repaint_timer_arm(struct weston_compositor *compositor)
if (!any_should_repaint) if (!any_should_repaint)
return; return;
/* Even if we should repaint immediately, add the minimum 1 ms delay. /* Even if we should repaint immediately, add the minimum 1 ns delay.
* This is a workaround to allow coalescing multiple output repaints * This is a workaround to allow coalescing multiple output repaints
* particularly from weston_output_finish_frame() * particularly from weston_output_finish_frame()
* into the same call, which would not happen if we called * into the same call, which would not happen if we called
* output_repaint_timer_handler() directly. * output_repaint_timer_handler() directly.
*/ */
if (msec_to_next < 1) if (nsec_to_next < 1)
msec_to_next = 1; nsec_to_next = 1;
timespec_from_msec(&next_time_its.it_value, msec_to_next); timespec_from_nsec(&next_time_its.it_value, nsec_to_next);
timerfd_settime(compositor->repaint_timer_fd, 0, &next_time_its, NULL); timerfd_settime(compositor->repaint_timer_fd, 0, &next_time_its, NULL);
} }