Track the duration of lazy loading BigPicture Notifications (3eb8287e) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/statusbar/notification/row/BigPictureIconManager.kt

+10 −6

Original line number	Diff line number	Diff line
		@@ -63,6 +63,7 @@ class BigPictureIconManager
		constructor(
		private val context: Context,
		private val imageLoader: ImageLoader,
		private val statsManager: BigPictureStatsManager,
		@Application private val scope: CoroutineScope,
		@Main private val mainDispatcher: CoroutineDispatcher,
		@Background private val bgDispatcher: CoroutineDispatcher
		@@ -182,8 +183,11 @@ constructor(
		displayedState = drawableAndState?.second ?: Empty
		}

		private fun startLoadingJob(icon: Icon): Job =
		scope.launch {
		private fun startLoadingJob(icon: Icon): Job = scope.launch {
		statsManager.measure { loadImage(icon) }
		}

		private suspend fun loadImage(icon: Icon) {
		val drawableAndState = withContext(bgDispatcher) { loadImageSync(icon) }
		withContext(mainDispatcher) { applyDrawableAndState(drawableAndState) }
		log("full image loaded")

packages/SystemUI/src/com/android/systemui/statusbar/notification/row/BigPictureStatsManager.kt

0 → 100644

+127 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2023 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.systemui.statusbar.notification.row

		import android.util.IndentingPrintWriter
		import android.util.Log
		import com.android.internal.util.LatencyTracker
		import com.android.systemui.Dumpable
		import com.android.systemui.dagger.SysUISingleton
		import com.android.systemui.dagger.qualifiers.Main
		import com.android.systemui.dump.DumpManager
		import java.io.PrintWriter
		import java.util.UUID
		import java.util.concurrent.ConcurrentHashMap
		import javax.inject.Inject
		import kotlin.math.roundToInt
		import kotlinx.coroutines.CoroutineDispatcher
		import kotlinx.coroutines.withContext

		private const val TAG = "BigPictureStatsManager"

		@SysUISingleton
		class BigPictureStatsManager
		@Inject
		constructor(
		private val latencyTracker: LatencyTracker,
		@Main private val mainDispatcher: CoroutineDispatcher,
		dumpManager: DumpManager
		) : Dumpable {

		init {
		dumpManager.registerNormalDumpable(TAG, this)
		}

		private val startTimes = ConcurrentHashMap<String, Long>()
		private val durations = mutableListOf<Int>()
		private val lock = Any()
		suspend inline fun <T> measure(block: () -> T): T {
		val key = UUID.randomUUID().toString()
		onBegin(key)
		try {
		return block()
		} catch (t: Throwable) {
		onCancel(key)
		throw t
		} finally {
		onEnd(key)?.let { duration -> trackEvent(duration) }
		}
		}

		fun onBegin(key: String) {
		if (startTimes.contains(key)) {
		Log.wtf(TAG, "key $key is already in use")
		return
		}

		startTimes[key] = System.nanoTime()
		}

		fun onEnd(key: String): Int? {
		val startTime =
		startTimes.remove(key)
		?: run {
		Log.wtf(TAG, "No matching begin call for this $key")
		return null
		}

		val durationInMillis = ((System.nanoTime() - startTime) / 1_000_000)
		return durationInMillis.toInt()
		}

		fun onCancel(key: String) {
		startTimes.remove(key)
		}

		override fun dump(pw: PrintWriter, args: Array<out String>) {
		synchronized(lock) {
		if (durations.isEmpty()) {
		pw.println("No entries")
		return
		}

		val max = durations.max()
		val avg = durations.average().roundToInt()
		val p90 = percentile(durations, 90.0)
		val p99 = percentile(durations, 99.0)

		with(IndentingPrintWriter(pw)) {
		println("Lazy-loaded ${durations.size} images:")
		increaseIndent()
		println("Avg: $avg ms")
		println("Max: $max ms")
		println("P90: $p90 ms")
		println("P99: $p99 ms")
		}
		}
		}

		private fun percentile(times: List<Int>, percent: Double): Int {
		val index = (percent / 100.0 * times.size).roundToInt() - 1
		return times.sorted()[index]
		}

		suspend fun trackEvent(duration: Int) {
		synchronized(lock) { durations.add(duration) }
		withContext(mainDispatcher) {
		latencyTracker.logAction(
		LatencyTracker.ACTION_NOTIFICATION_BIG_PICTURE_LOADED,
		duration
		)
		}
		}
		}

packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/BigPictureIconManagerTest.kt

+2 −0

Original line number	Diff line number	Diff line
		@@ -57,6 +57,7 @@ class BigPictureIconManagerTest : SysuiTestCase() {
		private val testScope = TestScope(testDispatcher)
		private val testableResources = context.orCreateTestableResources
		private val imageLoader: ImageLoader = ImageLoader(context, testDispatcher)
		private val statsManager = BigPictureStatsManager(mock(), testDispatcher, mock())
		private var mockConsumer: NotificationDrawableConsumer = mock()
		private val drawableCaptor = argumentCaptor<Drawable>()

		@@ -87,6 +88,7 @@ class BigPictureIconManagerTest : SysuiTestCase() {
		BigPictureIconManager(
		context,
		imageLoader,
		statsManager,
		scope = testScope,
		mainDispatcher = testDispatcher,
		bgDispatcher = testDispatcher