1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.game.qualification.test;
18 
19 import static org.junit.Assert.assertTrue;
20 
21 import com.android.tradefed.device.DeviceNotAvailableException;
22 import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
23 import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
24 
25 import org.junit.Test;
26 import org.junit.runner.RunWith;
27 
28 @RunWith(DeviceJUnit4ClassRunner.class)
29 public class DeviceConfigurationTest extends BaseHostJUnit4Test {
30     /**
31      * CONFIG_HZ must be >= 250 to ensure system responsiveness.
32      */
33     @Test
testConfigHzHighEnough()34     public void testConfigHzHighEnough()
35         throws DeviceNotAvailableException {
36 
37         /* Insist on the kernel tick rate being at least 250Hz. */
38 
39         String output = getDevice().executeShellCommand("gzip -dc /proc/config.gz | grep CONFIG_HZ=");
40         assertTrue(output.contains("CONFIG_HZ="));
41         int tickRate = Integer.parseInt(output.split("\n")[0].split("=")[1]);
42         assertTrue("Kernel tick rate is " + tickRate + " but certification requires at least 250", tickRate >= 250);
43     }
44 }
45