have the sensorsevice test print the delay of the first received event (16bcf66a) · Commits · e / os / android_frameworks_native

services/sensorservice/tests/sensorservicetest.cpp

+12 −4

Original line number	Diff line number	Diff line
		@@ -22,6 +22,9 @@

		using namespace android;

		static nsecs_t sStartTime = 0;


		int receiver(int fd, int events, void* data)
		{
		sp<SensorEventQueue> q((SensorEventQueue*)data);
		@@ -32,7 +35,7 @@ int receiver(int fd, int events, void* data)

		while ((n = q->read(buffer, 8)) > 0) {
		for (int i=0 ; i<n ; i++) {
		if (buffer[i].type == Sensor::TYPE_GYROSCOPE) {
		if (buffer[i].type == Sensor::TYPE_ACCELEROMETER) {
		printf("time=%lld, value=<%5.1f,%5.1f,%5.1f>\n",
		buffer[i].timestamp,
		buffer[i].acceleration.x,
		@@ -43,9 +46,11 @@ int receiver(int fd, int events, void* data)
		if (oldTimeStamp) {
		float t = float(buffer[i].timestamp - oldTimeStamp) / s2ns(1);
		printf("%f ms (%f Hz)\n", t*1000, 1.0/t);
		} else {
		float t = float(buffer[i].timestamp - sStartTime) / s2ns(1);
		printf("first event: %f ms\n", t*1000);
		}
		oldTimeStamp = buffer[i].timestamp;

		}
		}
		if (n<0 && n != -EAGAIN) {
		@@ -66,12 +71,15 @@ int main(int argc, char** argv)
		sp<SensorEventQueue> q = mgr.createEventQueue();
		printf("queue=%p\n", q.get());

		Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_GYROSCOPE);
		Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_ACCELEROMETER);
		printf("accelerometer=%p (%s)\n",
		accelerometer, accelerometer->getName().string());

		sStartTime = systemTime();

		q->enableSensor(accelerometer);

		q->setEventRate(accelerometer, ms2ns(10));
		q->setEventRate(accelerometer, ms2ns(200));

		sp<Looper> loop = new Looper(false);
		loop->addFd(q->getFd(), 0, ALOOPER_EVENT_INPUT, receiver, q.get());