Merge "Added perf test to measure bytes written"
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TreeHugger Robot
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Android (Google) Code Review
Android (Google) Code Review
commit
b070d682d1
@@ -0,0 +1,176 @@
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package android.database;
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import android.app.Activity;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.sqlite.SQLiteDatabase;
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import android.os.Bundle;
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import android.support.test.InstrumentationRegistry;
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import android.support.test.filters.LargeTest;
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import android.support.test.runner.AndroidJUnit4;
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import android.util.ArrayMap;
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import android.util.Log;
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import com.android.internal.util.Preconditions;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.util.List;
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import java.util.Map;
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import static org.junit.Assert.assertEquals;
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/**
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* Performance tests for measuring amount of data written during typical DB operations
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*
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* <p>To run: bit CorePerfTests:android.database.SQLiteDatabaseIoPerfTest
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*/
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@RunWith(AndroidJUnit4.class)
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@LargeTest
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public class SQLiteDatabaseIoPerfTest {
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private static final String TAG = "SQLiteDatabaseIoPerfTest";
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private static final String DB_NAME = "db_io_perftest";
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private static final int DEFAULT_DATASET_SIZE = 500;
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private Long mWriteBytes;
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private SQLiteDatabase mDatabase;
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private Context mContext;
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@Before
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public void setUp() {
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mContext = InstrumentationRegistry.getTargetContext();
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mContext.deleteDatabase(DB_NAME);
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mDatabase = mContext.openOrCreateDatabase(DB_NAME, Context.MODE_PRIVATE, null);
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mDatabase.execSQL("CREATE TABLE T1 "
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+ "(_ID INTEGER PRIMARY KEY, COL_A INTEGER, COL_B VARCHAR(100), COL_C REAL)");
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}
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@After
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public void tearDown() {
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mDatabase.close();
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mContext.deleteDatabase(DB_NAME);
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}
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@Test
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public void testDatabaseModifications() {
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startMeasuringWrites();
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ContentValues cv = new ContentValues();
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String[] whereArg = new String[1];
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for (int i = 0; i < DEFAULT_DATASET_SIZE; i++) {
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cv.put("_ID", i);
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cv.put("COL_A", i);
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cv.put("COL_B", "NewValue");
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cv.put("COL_C", 1.0);
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assertEquals(i, mDatabase.insert("T1", null, cv));
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}
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cv = new ContentValues();
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for (int i = 0; i < DEFAULT_DATASET_SIZE; i++) {
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cv.put("COL_B", "UpdatedValue");
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cv.put("COL_C", 1.1);
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whereArg[0] = String.valueOf(i);
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assertEquals(1, mDatabase.update("T1", cv, "_ID=?", whereArg));
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}
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for (int i = 0; i < DEFAULT_DATASET_SIZE; i++) {
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whereArg[0] = String.valueOf(i);
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assertEquals(1, mDatabase.delete("T1", "_ID=?", whereArg));
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}
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// Make sure all changes are written to disk
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mDatabase.close();
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long bytes = endMeasuringWrites();
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sendResults("testDatabaseModifications" , bytes);
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}
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@Test
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public void testInsertsWithTransactions() {
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startMeasuringWrites();
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final int txSize = 10;
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ContentValues cv = new ContentValues();
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for (int i = 0; i < DEFAULT_DATASET_SIZE * 5; i++) {
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if (i % txSize == 0) {
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mDatabase.beginTransaction();
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}
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if (i % txSize == txSize-1) {
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mDatabase.setTransactionSuccessful();
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mDatabase.endTransaction();
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}
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cv.put("_ID", i);
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cv.put("COL_A", i);
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cv.put("COL_B", "NewValue");
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cv.put("COL_C", 1.0);
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assertEquals(i, mDatabase.insert("T1", null, cv));
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}
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// Make sure all changes are written to disk
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mDatabase.close();
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long bytes = endMeasuringWrites();
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sendResults("testInsertsWithTransactions" , bytes);
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}
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private void startMeasuringWrites() {
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Preconditions.checkState(mWriteBytes == null, "Measurement already started");
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mWriteBytes = getIoStats().get("write_bytes");
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}
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private long endMeasuringWrites() {
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Preconditions.checkState(mWriteBytes != null, "Measurement wasn't started");
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Long newWriteBytes = getIoStats().get("write_bytes");
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return newWriteBytes - mWriteBytes;
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}
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private void sendResults(String testName, long writeBytes) {
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Log.i(TAG, testName + " write_bytes: " + writeBytes);
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Bundle status = new Bundle();
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status.putLong("write_bytes", writeBytes);
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InstrumentationRegistry.getInstrumentation().sendStatus(Activity.RESULT_OK, status);
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}
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private static Map<String, Long> getIoStats() {
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String ioStat = "/proc/self/io";
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Map<String, Long> results = new ArrayMap<>();
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try {
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List<String> lines = Files.readAllLines(new File(ioStat).toPath());
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for (String line : lines) {
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line = line.trim();
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String[] split = line.split(":");
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if (split.length == 2) {
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try {
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String key = split[0].trim();
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Long value = Long.valueOf(split[1].trim());
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results.put(key, value);
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} catch (NumberFormatException e) {
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Log.e(TAG, "Cannot parse number from " + line);
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}
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} else if (line.isEmpty()) {
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Log.e(TAG, "Cannot parse line " + line);
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}
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}
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} catch (IOException e) {
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Log.e(TAG, "Can't read: " + ioStat, e);
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}
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return results;
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}
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}
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