Merge changes I3e6b6b44,I467e4264 (f242babf) · Commits · e / os / android_frameworks_base

startop/apps/test/src/SystemServerBenchmarkActivity.java

+61 −17

Original line number	Diff line number	Diff line
		@@ -17,8 +17,11 @@
		package com.android.startop.test;

		import android.app.Activity;
		import android.content.ComponentName;
		import android.content.Context;
		import android.content.pm.ApplicationInfo;
		import android.content.pm.PackageManager;
		import android.content.pm.PackageManager.NameNotFoundException;
		import android.os.AsyncTask;
		import android.os.Bundle;
		import android.os.Trace;
		@@ -32,7 +35,8 @@ import android.widget.TextView;
		import java.util.Arrays;

		class Benchmark {
		public static final int NUM_ITERATIONS = 1000;
		// Time limit to run benchmarks in seconds
		public static final int TIME_LIMIT = 5;

		public Benchmark(ViewGroup parent, CharSequence name, Runnable thunk) {
		Context context = parent.getContext();
		@@ -54,28 +58,25 @@ class Benchmark {

		@Override
		protected Object doInBackground(Object... _args) {
		long[] results = new long[NUM_ITERATIONS];
		long startTime = System.nanoTime();
		int count = 0;

		// Run benchmark
		for (int i = 0; i < results.length; i++) {
		results[i] = -System.nanoTime();
		while (true) {
		long elapsed = -System.nanoTime();
		thunk.run();
		results[i] += System.nanoTime();
		}
		elapsed += System.nanoTime();

		// Compute mean
		long sum = Arrays.stream(results).sum();
		resultMean = (double) sum / results.length;
		count++;
		double elapsedVariance = (double) elapsed - resultMean;
		resultMean += elapsedVariance / count;
		resultStdev += elapsedVariance * ((double) elapsed - resultMean);

		// Compute standard deviation
		double variance = 0;
		for (long i : results) {
		double t = (double) i - resultMean;
		variance += t * t;
		if (System.nanoTime() - startTime > TIME_LIMIT * 1e9) {
		break;
		}
		variance /= results.length - 1;

		resultStdev = Math.sqrt(variance);
		}
		resultStdev = Math.sqrt(resultStdev / (count - 1));

		return null;
		}
		@@ -108,5 +109,48 @@ public class SystemServerBenchmarkActivity extends Activity {
		new Benchmark(benchmarkList, "getInstalledApplications", () -> {
		pm.getInstalledApplications(PackageManager.MATCH_SYSTEM_ONLY);
		});

		new Benchmark(benchmarkList, "getInstalledPackages", () -> {
		pm.getInstalledPackages(PackageManager.GET_ACTIVITIES);
		});

		new Benchmark(benchmarkList, "getPackageInfo", () -> {
		try {
		pm.getPackageInfo("com.android.startop.test", 0);
		} catch (NameNotFoundException e) {
		throw new RuntimeException(e);
		}
		});

		new Benchmark(benchmarkList, "getApplicationInfo", () -> {
		try {
		pm.getApplicationInfo("com.android.startop.test", 0);
		} catch (NameNotFoundException e) {
		throw new RuntimeException(e);
		}
		});

		try {
		ApplicationInfo app = pm.getApplicationInfo("com.android.startop.test", 0);
		new Benchmark(benchmarkList, "getResourcesForApplication", () -> {
		try {
		pm.getResourcesForApplication(app);
		} catch (NameNotFoundException e) {
		throw new RuntimeException(e);
		}
		});
		} catch (NameNotFoundException e) {
		throw new RuntimeException(e);
		}

		ComponentName component = new ComponentName(this, this.getClass());
		new Benchmark(benchmarkList, "getActivityInfo", () -> {
		try {
		pm.getActivityInfo(component, PackageManager.GET_META_DATA);
		} catch (NameNotFoundException e) {
		throw new RuntimeException(e);
		}
		});

		}
		}