1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* Copyright (C) 2017 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.database;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.test.InstrumentationRegistry;
import android.support.test.filters.LargeTest;
import android.support.test.runner.AndroidJUnit4;
import android.util.ArrayMap;
import android.util.Log;
import com.android.internal.util.Preconditions;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.List;
import java.util.Map;
import static org.junit.Assert.assertEquals;
/**
* Performance tests for measuring amount of data written during typical DB operations
*
* <p>To run: bit CorePerfTests:android.database.SQLiteDatabaseIoPerfTest
*/
@RunWith(AndroidJUnit4.class)
@LargeTest
public class SQLiteDatabaseIoPerfTest {
private static final String TAG = "SQLiteDatabaseIoPerfTest";
private static final String DB_NAME = "db_io_perftest";
private static final int DEFAULT_DATASET_SIZE = 500;
private Long mWriteBytes;
private SQLiteDatabase mDatabase;
private Context mContext;
@Before
public void setUp() {
mContext = InstrumentationRegistry.getTargetContext();
mContext.deleteDatabase(DB_NAME);
mDatabase = mContext.openOrCreateDatabase(DB_NAME, Context.MODE_PRIVATE, null);
mDatabase.execSQL("CREATE TABLE T1 "
+ "(_ID INTEGER PRIMARY KEY, COL_A INTEGER, COL_B VARCHAR(100), COL_C REAL)");
}
@After
public void tearDown() {
mDatabase.close();
mContext.deleteDatabase(DB_NAME);
}
@Test
public void testDatabaseModifications() {
startMeasuringWrites();
ContentValues cv = new ContentValues();
String[] whereArg = new String[1];
for (int i = 0; i < DEFAULT_DATASET_SIZE; i++) {
cv.put("_ID", i);
cv.put("COL_A", i);
cv.put("COL_B", "NewValue");
cv.put("COL_C", 1.0);
assertEquals(i, mDatabase.insert("T1", null, cv));
}
cv = new ContentValues();
for (int i = 0; i < DEFAULT_DATASET_SIZE; i++) {
cv.put("COL_B", "UpdatedValue");
cv.put("COL_C", 1.1);
whereArg[0] = String.valueOf(i);
assertEquals(1, mDatabase.update("T1", cv, "_ID=?", whereArg));
}
for (int i = 0; i < DEFAULT_DATASET_SIZE; i++) {
whereArg[0] = String.valueOf(i);
assertEquals(1, mDatabase.delete("T1", "_ID=?", whereArg));
}
// Make sure all changes are written to disk
mDatabase.close();
long bytes = endMeasuringWrites();
sendResults("testDatabaseModifications" , bytes);
}
@Test
public void testInsertsWithTransactions() {
startMeasuringWrites();
final int txSize = 10;
ContentValues cv = new ContentValues();
for (int i = 0; i < DEFAULT_DATASET_SIZE * 5; i++) {
if (i % txSize == 0) {
mDatabase.beginTransaction();
}
if (i % txSize == txSize-1) {
mDatabase.setTransactionSuccessful();
mDatabase.endTransaction();
}
cv.put("_ID", i);
cv.put("COL_A", i);
cv.put("COL_B", "NewValue");
cv.put("COL_C", 1.0);
assertEquals(i, mDatabase.insert("T1", null, cv));
}
// Make sure all changes are written to disk
mDatabase.close();
long bytes = endMeasuringWrites();
sendResults("testInsertsWithTransactions" , bytes);
}
private void startMeasuringWrites() {
Preconditions.checkState(mWriteBytes == null, "Measurement already started");
mWriteBytes = getIoStats().get("write_bytes");
}
private long endMeasuringWrites() {
Preconditions.checkState(mWriteBytes != null, "Measurement wasn't started");
Long newWriteBytes = getIoStats().get("write_bytes");
return newWriteBytes - mWriteBytes;
}
private void sendResults(String testName, long writeBytes) {
Log.i(TAG, testName + " write_bytes: " + writeBytes);
Bundle status = new Bundle();
status.putLong("write_bytes", writeBytes);
InstrumentationRegistry.getInstrumentation().sendStatus(Activity.RESULT_OK, status);
}
private static Map<String, Long> getIoStats() {
String ioStat = "/proc/self/io";
Map<String, Long> results = new ArrayMap<>();
try {
List<String> lines = Files.readAllLines(new File(ioStat).toPath());
for (String line : lines) {
line = line.trim();
String[] split = line.split(":");
if (split.length == 2) {
try {
String key = split[0].trim();
Long value = Long.valueOf(split[1].trim());
results.put(key, value);
} catch (NumberFormatException e) {
Log.e(TAG, "Cannot parse number from " + line);
}
} else if (line.isEmpty()) {
Log.e(TAG, "Cannot parse line " + line);
}
}
} catch (IOException e) {
Log.e(TAG, "Can't read: " + ioStat, e);
}
return results;
}
}
|
