am eb84ac4d: am 5794f230: change the way test app waits for gc

package com.android.dumprendertree;

import dalvik.system.VMRuntime;

import android.app.Instrumentation;

import android.content.Context;

import android.content.Intent;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.PrintStream;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.TimeUnit;

public class LoadTestsAutoTest extends ActivityInstrumentationTestCase2<TestShellActivity> {

    private final static String LOGTAG = "LoadTest";

    private final static String LOAD_TEST_RESULT =

        Environment.getExternalStorageDirectory() + "/load_test_result.txt";

    private final static int MAX_GC_WAIT_SEC = 10;

    private boolean mFinished;

    static final String LOAD_TEST_RUNNER_FILES[] = {

        "run_page_cycler.py"

    private void freeMem() {

        Log.v(LOGTAG, "freeMem: calling gc...");

        final VMRuntime runtime = VMRuntime.getRuntime();

        runtime.gcSoftReferences();

        runtime.gcSoftReferences();

        runtime.gcSoftReferences();

        Runtime.getRuntime().gc();

        Runtime.getRuntime().gc();

        final CountDownLatch latch = new CountDownLatch(1);

        Object dummy = new Object() {

            @Override

            protected void finalize() throws Throwable {

                latch.countDown();

                super.finalize();

            }

        };

        dummy = null;

        System.gc();

        try {

            if (!latch.await(MAX_GC_WAIT_SEC, TimeUnit.SECONDS)) {

                Log.w(LOGTAG, "gc did not happen in 10s");

            }

        } catch (InterruptedException e) {

            //ignore

        }

    }

    private void printRow(PrintStream ps, String format, Object...objs) {