Merge "Calculate batching param in a smarter way" into oc-dev (20c35e42) · Commits · e / os / android_frameworks_native

services/sensorservice/SensorDevice.cpp

+38 −63

Original line number	Diff line number	Diff line
		@@ -31,6 +31,7 @@ using android::hardware::hidl_vec;
		using namespace android::hardware::sensors::V1_0;
		using namespace android::hardware::sensors::V1_0::implementation;


		namespace android {
		// ---------------------------------------------------------------------------

		@@ -138,20 +139,19 @@ std::string SensorDevice::dump() const {

		result.append("sampling_period(ms) = {");
		for (size_t j = 0; j < info.batchParams.size(); j++) {
		const BatchParams& params = info.batchParams.valueAt(j);
		result.appendFormat("%.1f%s", params.batchDelay / 1e6f,
		const BatchParams& params = info.batchParams[j];
		result.appendFormat("%.1f%s", params.mTSample / 1e6f,
		j < info.batchParams.size() - 1 ? ", " : "");
		}
		result.appendFormat("}, selected = %.1f ms; ", info.bestBatchParams.batchDelay / 1e6f);
		result.appendFormat("}, selected = %.2f ms; ", info.bestBatchParams.mTSample / 1e6f);

		result.append("batching_period(ms) = {");
		for (size_t j = 0; j < info.batchParams.size(); j++) {
		BatchParams params = info.batchParams.valueAt(j);

		result.appendFormat("%.1f%s", params.batchTimeout / 1e6f,
		const BatchParams& params = info.batchParams[j];
		result.appendFormat("%.1f%s", params.mTBatch / 1e6f,
		j < info.batchParams.size() - 1 ? ", " : "");
		}
		result.appendFormat("}, selected = %.1f ms\n", info.bestBatchParams.batchTimeout / 1e6f);
		result.appendFormat("}, selected = %.2f ms\n", info.bestBatchParams.mTBatch / 1e6f);
		}

		return result.string();
		@@ -270,13 +270,10 @@ status_t SensorDevice::activate(void* ident, int handle, int enabled) {
		// batch_rate and timeout. One of the apps has unregistered for sensor
		// events, and the best effort batch parameters might have changed.
		ALOGD_IF(DEBUG_CONNECTIONS,
		"\t>>> actuating h/w batch %d %d %" PRId64 " %" PRId64, handle,
		info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
		info.bestBatchParams.batchTimeout);
		"\t>>> actuating h/w batch 0x%08x %" PRId64 " %" PRId64, handle,
		info.bestBatchParams.mTSample, info.bestBatchParams.mTBatch);
		checkReturn(mSensors->batch(
		handle,
		info.bestBatchParams.batchDelay,
		info.bestBatchParams.batchTimeout));
		handle, info.bestBatchParams.mTSample, info.bestBatchParams.mTBatch));
		}
		} else {
		// sensor wasn't enabled for this ident
		@@ -314,6 +311,9 @@ status_t SensorDevice::batch(
		if (samplingPeriodNs < MINIMUM_EVENTS_PERIOD) {
		samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
		}
		if (maxBatchReportLatencyNs < 0) {
		maxBatchReportLatencyNs = 0;
		}

		ALOGD_IF(DEBUG_CONNECTIONS,
		"SensorDevice::batch: ident=%p, handle=0x%08x, flags=%d, period_ns=%" PRId64 " timeout=%" PRId64,
		@@ -323,7 +323,7 @@ status_t SensorDevice::batch(
		Info& info(mActivationCount.editValueFor(handle));

		if (info.batchParams.indexOfKey(ident) < 0) {
		BatchParams params(flags, samplingPeriodNs, maxBatchReportLatencyNs);
		BatchParams params(samplingPeriodNs, maxBatchReportLatencyNs);
		info.batchParams.add(ident, params);
		} else {
		// A batch has already been called with this ident. Update the batch parameters.
		@@ -337,25 +337,21 @@ status_t SensorDevice::batch(
		ALOGD_IF(DEBUG_CONNECTIONS,
		"\t>>> curr_period=%" PRId64 " min_period=%" PRId64
		" curr_timeout=%" PRId64 " min_timeout=%" PRId64,
		prevBestBatchParams.batchDelay, info.bestBatchParams.batchDelay,
		prevBestBatchParams.batchTimeout, info.bestBatchParams.batchTimeout);
		prevBestBatchParams.mTSample, info.bestBatchParams.mTSample,
		prevBestBatchParams.mTBatch, info.bestBatchParams.mTBatch);

		status_t err(NO_ERROR);
		// If the min period or min timeout has changed since the last batch call, call batch.
		if (prevBestBatchParams != info.bestBatchParams) {
		ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w BATCH %d %d %" PRId64 " %" PRId64, handle,
		info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
		info.bestBatchParams.batchTimeout);
		ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w BATCH 0x%08x %" PRId64 " %" PRId64, handle,
		info.bestBatchParams.mTSample, info.bestBatchParams.mTBatch);
		err = StatusFromResult(
		checkReturn(mSensors->batch(
		handle,
		info.bestBatchParams.batchDelay,
		info.bestBatchParams.batchTimeout)));
		handle, info.bestBatchParams.mTSample, info.bestBatchParams.mTBatch)));
		if (err != NO_ERROR) {
		ALOGE("sensor batch failed %p %d %d %" PRId64 " %" PRId64 " err=%s",
		mSensors.get(), handle,
		info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
		info.bestBatchParams.batchTimeout, strerror(-err));
		ALOGE("sensor batch failed %p 0x%08x %" PRId64 " %" PRId64 " err=%s",
		mSensors.get(), handle, info.bestBatchParams.mTSample,
		info.bestBatchParams.mTBatch, strerror(-err));
		info.removeBatchParamsForIdent(ident);
		}
		}
		@@ -363,28 +359,7 @@ status_t SensorDevice::batch(
		}

		status_t SensorDevice::setDelay(void* ident, int handle, int64_t samplingPeriodNs) {
		if (mSensors == nullptr) return NO_INIT;
		if (samplingPeriodNs < MINIMUM_EVENTS_PERIOD) {
		samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
		}
		Mutex::Autolock _l(mLock);
		if (isClientDisabledLocked(ident)) return INVALID_OPERATION;
		Info& info( mActivationCount.editValueFor(handle) );
		// If the underlying sensor is NOT in continuous mode, setDelay() should return an error.
		// Calling setDelay() in batch mode is an invalid operation.
		if (info.bestBatchParams.batchTimeout != 0) {
		return INVALID_OPERATION;
		}
		ssize_t index = info.batchParams.indexOfKey(ident);
		if (index < 0) {
		return BAD_INDEX;
		}
		BatchParams& params = info.batchParams.editValueAt(index);
		params.batchDelay = samplingPeriodNs;
		info.selectBatchParams();

		return StatusFromResult(
		checkReturn(mSensors->batch(handle, info.bestBatchParams.batchDelay, 0)));
		return batch(ident, handle, 0, samplingPeriodNs, 0);
		}

		int SensorDevice::getHalDeviceVersion() const {
		@@ -423,8 +398,8 @@ void SensorDevice::enableAllSensors() {
		status_t err = StatusFromResult(
		checkReturn(mSensors->batch(
		sensor_handle,
		info.bestBatchParams.batchDelay,
		info.bestBatchParams.batchTimeout)));
		info.bestBatchParams.mTSample,
		info.bestBatchParams.mTBatch)));
		ALOGE_IF(err, "Error calling batch on sensor %d (%s)", sensor_handle, strerror(-err));

		if (err == NO_ERROR) {
		@@ -581,35 +556,35 @@ int SensorDevice::Info::numActiveClients() {
		return num;
		}

		status_t SensorDevice::Info::setBatchParamsForIdent(void* ident, int flags,
		status_t SensorDevice::Info::setBatchParamsForIdent(void* ident, int,
		int64_t samplingPeriodNs,
		int64_t maxBatchReportLatencyNs) {
		ssize_t index = batchParams.indexOfKey(ident);
		if (index < 0) {
		ALOGE("Info::setBatchParamsForIdent(ident=%p, period_ns=%" PRId64 " timeout=%" PRId64 ") failed (%s)",
		ALOGE("Info::setBatchParamsForIdent(ident=%p, period_ns=%" PRId64
		" timeout=%" PRId64 ") failed (%s)",
		ident, samplingPeriodNs, maxBatchReportLatencyNs, strerror(-index));
		return BAD_INDEX;
		}
		BatchParams& params = batchParams.editValueAt(index);
		params.flags = flags;
		params.batchDelay = samplingPeriodNs;
		params.batchTimeout = maxBatchReportLatencyNs;
		params.mTSample = samplingPeriodNs;
		params.mTBatch = maxBatchReportLatencyNs;
		return NO_ERROR;
		}

		void SensorDevice::Info::selectBatchParams() {
		BatchParams bestParams(0, -1, -1);
		BatchParams bestParams; // default to max Tsample and max Tbatch
		SensorDevice& device(SensorDevice::getInstance());

		for (size_t i = 0; i < batchParams.size(); ++i) {
		if (device.isClientDisabledLocked(batchParams.keyAt(i))) continue;
		BatchParams params = batchParams.valueAt(i);
		if (bestParams.batchDelay == -1 \|\| params.batchDelay < bestParams.batchDelay) {
		bestParams.batchDelay = params.batchDelay;
		if (device.isClientDisabledLocked(batchParams.keyAt(i))) {
		continue;
		}
		if (bestParams.batchTimeout == -1 \|\| params.batchTimeout < bestParams.batchTimeout) {
		bestParams.batchTimeout = params.batchTimeout;
		bestParams.merge(batchParams[i]);
		}
		// if mTBatch <= mTSample, it is in streaming mode. set mTbatch to 0 to demand this explicitly.
		if (bestParams.mTBatch <= bestParams.mTSample) {
		bestParams.mTBatch = 0;
		}
		bestBatchParams = bestParams;
		}

services/sensorservice/SensorDevice.h

+14 −11

Original line number	Diff line number	Diff line
		@@ -27,7 +27,8 @@
		#include <utils/String8.h>

		#include <string>
		#include <map>
		#include <unordered_map>
		#include <algorithm> //std::max std::min

		#include "android/hardware/sensors/1.0/ISensors.h"

		@@ -106,7 +107,7 @@ private:

		sp<android::hardware::sensors::V1_0::ISensors> mSensors;
		Vector<sensor_t> mSensorList;
		std::map<int32_t, sensor_t*> mConnectedDynamicSensors;
		std::unordered_map<int32_t, sensor_t*> mConnectedDynamicSensors;

		static const nsecs_t MINIMUM_EVENTS_PERIOD = 1000000; // 1000 Hz
		mutable Mutex mLock; // protect mActivationCount[].batchParams
		@@ -115,15 +116,18 @@ private:
		// Struct to store all the parameters(samplingPeriod, maxBatchReportLatency and flags) from
		// batch call. For continous mode clients, maxBatchReportLatency is set to zero.
		struct BatchParams {
		// TODO: Get rid of flags parameter everywhere.
		int flags;
		nsecs_t batchDelay, batchTimeout;
		BatchParams() : flags(0), batchDelay(0), batchTimeout(0) {}
		BatchParams(int flag, nsecs_t delay, nsecs_t timeout): flags(flag), batchDelay(delay),
		batchTimeout(timeout) { }
		nsecs_t mTSample, mTBatch;
		BatchParams() : mTSample(INT64_MAX), mTBatch(INT64_MAX) {}
		BatchParams(nsecs_t tSample, nsecs_t tBatch): mTSample(tSample), mTBatch(tBatch) {}
		bool operator != (const BatchParams& other) {
		return other.batchDelay != batchDelay \|\| other.batchTimeout != batchTimeout \|\|
		other.flags != flags;
		return !(mTSample == other.mTSample && mTBatch == other.mTBatch);
		}
		// Merge another parameter with this one. The updated mTSample will be the min of the two.
		// The update mTBatch will be the min of original mTBatch and the apparent batch period
		// of the other. the apparent batch is the maximum of mTBatch and mTSample,
		void merge(const BatchParams &other) {
		mTSample = std::min(mTSample, other.mTSample);
		mTBatch = std::min(mTBatch, std::max(other.mTBatch, other.mTSample));
		}
		};

		@@ -139,7 +143,6 @@ private:
		// requested by the client.
		KeyedVector<void*, BatchParams> batchParams;

		Info() : bestBatchParams(0, -1, -1) {}
		// Sets batch parameters for this ident. Returns error if this ident is not already present
		// in the KeyedVector above.
		status_t setBatchParamsForIdent(void* ident, int flags, int64_t samplingPeriodNs,