Merge "EventHub: Log slow reads" into main (82dfa02a) · Commits · e / os / android_frameworks_native

services/inputflinger/reader/EventHub.cpp

+13 −0

Original line number	Diff line number	Diff line
		@@ -86,6 +86,10 @@ static constexpr int32_t FF_WEAK_MAGNITUDE_CHANNEL_IDX = 1;

		static constexpr size_t EVENT_BUFFER_SIZE = 256;

		// Logs if the difference between the event timestamp and the read time is
		// greater than this threshold.
		static constexpr nsecs_t SLOW_READ_LOG_THRESHOLD_NS = ms2ns(100);

		// Mapping for input battery class node IDs lookup.
		// https://www.kernel.org/doc/Documentation/power/power_supply_class.txt
		static const std::unordered_map<std::string, InputBatteryClass> BATTERY_CLASSES =
		@@ -1997,6 +2001,15 @@ std::vector<RawEvent> EventHub::getEvents(int timeoutMillis) {
		.code = iev.code,
		.value = iev.value,
		});
		const nsecs_t readDeltaNs = events.back().readTime - events.back().when;
		if (readDeltaNs >= SLOW_READ_LOG_THRESHOLD_NS) {
		ALOGW(
		"Slow read detected for device '%s', eventTime: %" PRId64 "ns, "
		"readDelta: %" PRId64 " ns (over the threshold of %" PRId64
		" ms)",
		device->identifier.name.c_str(), events.back().when,
		readDeltaNs, ns2ms(SLOW_READ_LOG_THRESHOLD_NS));
		}
		}
		if (events.size() >= EVENT_BUFFER_SIZE) {
		// The result buffer is full. Reset the pending event index