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[client] x11: be less sensitive to frame skips

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External events like launching other applications can cause latency
spikes while X11 initializes the application, we should only start
adjusting our delay if we see excessive skips over a 1s period.
This commit is contained in:
Geoffrey McRae 2021-08-09 15:51:01 +10:00
parent bc7e59c9d7
commit 1fd726eed7
1 changed files with 11 additions and 4 deletions
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15
client/displayservers/X11/x11.c
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@ -1311,19 +1311,26 @@ static bool x11WaitFrame(void)
/* adjustments if we are still seeing odd skips */ /* adjustments if we are still seeing odd skips */
const uint64_t lastWMEvent = atomic_load(&x11.lastWMEvent); const uint64_t lastWMEvent = atomic_load(&x11.lastWMEvent);
const uint64_t eventDelta = ust > lastWMEvent ? ust - lastWMEvent : 0; const uint64_t eventDelta = ust > lastWMEvent ? ust - lastWMEvent : 0;
static int skipCount = 0;
static uint64_t lastSkipTime = 0;
if (skipCount > 0 && ust - lastSkipTime > 1000000UL)
skipCount = 0;
if (delay > 0 && deltamsc > 1 && eventDelta > 1000000UL) if (delay > 0 && deltamsc > 1 && eventDelta > 1000000UL)
{ {
/* only adjust if the last skip was less then 1s ago */ /* only adjust if the last skip was less then 1s ago */
static uint64_t lastSkip = 0; const bool flag = ust - lastSkipTime < 1000000UL;
const bool adjust = ust - lastSkip < 1000000UL; lastSkipTime = ust;
lastSkip = ust;
if (adjust) if (flag && ++skipCount > 10)
{ {
if (delay - 500 < delay) if (delay - 500 < delay)
{ {
delay -= 500; delay -= 500;
DEBUG_INFO("Excessing skipping detected, reduced calibration delay to %lu us", delay); DEBUG_INFO("Excessing skipping detected, reduced calibration delay to %lu us", delay);
skipCount = 0;
} }
else else
{ {