Merge "Introduce perf tests for background text layout performance"

apct-tests/perftests/core/src/android/text/StaticLayoutMultithreadPerfTest.java

@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2018 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 android.text;
+
+import android.perftests.utils.BenchmarkState;
+import android.perftests.utils.PerfStatusReporter;
+
+import android.support.test.filters.LargeTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Random;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.TimeUnit;
+
+@LargeTest
+@RunWith(AndroidJUnit4.class)
+public class StaticLayoutMultithreadPerfTest {
+    private static final int WORD_LENGTH = 9;  // Random word has 9 characters.
+    private static final int WORDS_IN_LINE = 8;  // Roughly, 8 words in a line.
+    private static final boolean NO_STYLE_TEXT = false;
+
+    private static TextPaint PAINT = new TextPaint();
+    private static final int TEXT_WIDTH = WORDS_IN_LINE * WORD_LENGTH * (int) PAINT.getTextSize();
+
+    public StaticLayoutMultithreadPerfTest() {}
+
+    @Rule
+    public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
+
+    private CountDownLatch mStartLatch;
+    private AtomicBoolean mThreadState;  // True for running, False for stopped.
+
+    private static final long TIMEOUT_MS = 5000;
+
+    private Thread[] startBackgroundThread(int numOfThreads) {
+        mStartLatch = new CountDownLatch(numOfThreads);
+        mThreadState = new AtomicBoolean(true);
+
+        Thread[] threads = new Thread[numOfThreads];
+        for (int i = 0; i < numOfThreads; ++i) {
+            final int seed = i + 1;
+            threads[i] = new Thread(new Runnable() {
+                @Override
+                public void run() {
+                    final TextPerfUtils util = new TextPerfUtils();
+                    util.resetRandom(seed);
+
+                    mStartLatch.countDown();
+                    while (mThreadState.get()) {
+                        final CharSequence text = util.nextRandomParagraph(
+                                WORD_LENGTH, NO_STYLE_TEXT);
+                        StaticLayout.Builder.obtain(text, 0, text.length(), PAINT, TEXT_WIDTH)
+                                .build();
+                    }
+                }
+            });
+        }
+
+        for (int i = 0; i < numOfThreads; ++i) {
+            threads[i].start();
+        }
+
+        try {
+            mStartLatch.await(TIMEOUT_MS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        return threads;
+    }
+
+    private void finishThreads(Thread[] threads) {
+        mThreadState.set(false);
+        for (Thread thread : threads) {
+            try {
+                thread.join();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        mStartLatch = null;
+        mThreadState = null;
+    }
+
+    private void runRandomTest(int numOfTotalThreads) {
+        final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
+        final TextPerfUtils util = new TextPerfUtils();
+        Thread[] threads = startBackgroundThread(numOfTotalThreads - 1);
+        while (state.keepRunning()) {
+            state.pauseTiming();
+            final CharSequence text = util.nextRandomParagraph(WORD_LENGTH, NO_STYLE_TEXT);
+            state.resumeTiming();
+
+            StaticLayout.Builder.obtain(text, 0, text.length(), PAINT, TEXT_WIDTH)
+                    .setHyphenationFrequency(Layout.HYPHENATION_FREQUENCY_NONE)
+                    .setBreakStrategy(Layout.BREAK_STRATEGY_SIMPLE)
+                    .build();
+        }
+        finishThreads(threads);
+    }
+
+    @Test
+    public void testCreate_RandomText_Thread_1() {
+        runRandomTest(1);
+    }
+
+    @Test
+    public void testCreate_RandomText_Thread_2() {
+        runRandomTest(2);
+    }
+
+    @Test
+    public void testCreate_RandomText_Thread_4() {
+        runRandomTest(4);
+    }
+}