xref: /aosp_15_r20/art/test/028-array-write/src/Main.java (revision 795d594fd825385562da6b089ea9b2033f3abf5a)
1*795d594fSAndroid Build Coastguard Worker /*
2*795d594fSAndroid Build Coastguard Worker  * Copyright (C) 2007 The Android Open Source Project
3*795d594fSAndroid Build Coastguard Worker  *
4*795d594fSAndroid Build Coastguard Worker  * Licensed under the Apache License, Version 2.0 (the "License");
5*795d594fSAndroid Build Coastguard Worker  * you may not use this file except in compliance with the License.
6*795d594fSAndroid Build Coastguard Worker  * You may obtain a copy of the License at
7*795d594fSAndroid Build Coastguard Worker  *
8*795d594fSAndroid Build Coastguard Worker  *      http://www.apache.org/licenses/LICENSE-2.0
9*795d594fSAndroid Build Coastguard Worker  *
10*795d594fSAndroid Build Coastguard Worker  * Unless required by applicable law or agreed to in writing, software
11*795d594fSAndroid Build Coastguard Worker  * distributed under the License is distributed on an "AS IS" BASIS,
12*795d594fSAndroid Build Coastguard Worker  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*795d594fSAndroid Build Coastguard Worker  * See the License for the specific language governing permissions and
14*795d594fSAndroid Build Coastguard Worker  * limitations under the License.
15*795d594fSAndroid Build Coastguard Worker  */
16*795d594fSAndroid Build Coastguard Worker 
17*795d594fSAndroid Build Coastguard Worker /**
18*795d594fSAndroid Build Coastguard Worker  * Array write speed test.
19*795d594fSAndroid Build Coastguard Worker  */
20*795d594fSAndroid Build Coastguard Worker public class Main {
21*795d594fSAndroid Build Coastguard Worker     /** whether to report times */
22*795d594fSAndroid Build Coastguard Worker     static boolean timing = false;
23*795d594fSAndroid Build Coastguard Worker 
24*795d594fSAndroid Build Coastguard Worker     static final int STORAGE_SIZE = 128*1024;
25*795d594fSAndroid Build Coastguard Worker     static int[] mStorage = new int[STORAGE_SIZE];
26*795d594fSAndroid Build Coastguard Worker 
report(long start, long end)27*795d594fSAndroid Build Coastguard Worker     static public void report(long start, long end) {
28*795d594fSAndroid Build Coastguard Worker         if (! timing) {
29*795d594fSAndroid Build Coastguard Worker             return;
30*795d594fSAndroid Build Coastguard Worker         }
31*795d594fSAndroid Build Coastguard Worker 
32*795d594fSAndroid Build Coastguard Worker         System.out.println("Finished in " + ((end - start) / 1000000.0)
33*795d594fSAndroid Build Coastguard Worker             + " msec");
34*795d594fSAndroid Build Coastguard Worker     }
35*795d594fSAndroid Build Coastguard Worker 
writeArray(int val)36*795d594fSAndroid Build Coastguard Worker     static void writeArray(int val) {
37*795d594fSAndroid Build Coastguard Worker         for (int i = STORAGE_SIZE-1; i >= 0; i--)
38*795d594fSAndroid Build Coastguard Worker             mStorage[i] = val;
39*795d594fSAndroid Build Coastguard Worker     }
40*795d594fSAndroid Build Coastguard Worker 
writeTest()41*795d594fSAndroid Build Coastguard Worker     static void writeTest() {
42*795d594fSAndroid Build Coastguard Worker         long start, end;
43*795d594fSAndroid Build Coastguard Worker 
44*795d594fSAndroid Build Coastguard Worker         writeArray(0);  // touch all the memory
45*795d594fSAndroid Build Coastguard Worker 
46*795d594fSAndroid Build Coastguard Worker         System.out.println("Running writeTest...");
47*795d594fSAndroid Build Coastguard Worker         start = System.nanoTime();
48*795d594fSAndroid Build Coastguard Worker         for (int i = 1; i < 20; i++)
49*795d594fSAndroid Build Coastguard Worker             writeArray(i);
50*795d594fSAndroid Build Coastguard Worker         end = System.nanoTime();
51*795d594fSAndroid Build Coastguard Worker 
52*795d594fSAndroid Build Coastguard Worker         report(start, end);
53*795d594fSAndroid Build Coastguard Worker     }
54*795d594fSAndroid Build Coastguard Worker 
copyTest()55*795d594fSAndroid Build Coastguard Worker     static void copyTest() {
56*795d594fSAndroid Build Coastguard Worker         long start, end;
57*795d594fSAndroid Build Coastguard Worker 
58*795d594fSAndroid Build Coastguard Worker         // touch once
59*795d594fSAndroid Build Coastguard Worker         System.arraycopy(mStorage, 0, mStorage,
60*795d594fSAndroid Build Coastguard Worker             STORAGE_SIZE/2, STORAGE_SIZE/2);
61*795d594fSAndroid Build Coastguard Worker 
62*795d594fSAndroid Build Coastguard Worker         System.out.println("Running copyTest...");
63*795d594fSAndroid Build Coastguard Worker         start = System.nanoTime();
64*795d594fSAndroid Build Coastguard Worker         for (int i = 1; i < 35; i++) {
65*795d594fSAndroid Build Coastguard Worker             System.arraycopy(mStorage, 0, mStorage,
66*795d594fSAndroid Build Coastguard Worker                 STORAGE_SIZE/2, STORAGE_SIZE/2);
67*795d594fSAndroid Build Coastguard Worker         }
68*795d594fSAndroid Build Coastguard Worker         end = System.nanoTime();
69*795d594fSAndroid Build Coastguard Worker 
70*795d594fSAndroid Build Coastguard Worker         report(start, end);
71*795d594fSAndroid Build Coastguard Worker     }
72*795d594fSAndroid Build Coastguard Worker 
array_028()73*795d594fSAndroid Build Coastguard Worker     public static void array_028() {
74*795d594fSAndroid Build Coastguard Worker         writeTest();
75*795d594fSAndroid Build Coastguard Worker         copyTest();
76*795d594fSAndroid Build Coastguard Worker         System.out.println("Done!");
77*795d594fSAndroid Build Coastguard Worker     }
78*795d594fSAndroid Build Coastguard Worker 
main(String[] args)79*795d594fSAndroid Build Coastguard Worker     public static void main(String[] args) {
80*795d594fSAndroid Build Coastguard Worker         if ((args.length >= 1) && args[0].equals("--timing")) {
81*795d594fSAndroid Build Coastguard Worker             timing = true;
82*795d594fSAndroid Build Coastguard Worker         }
83*795d594fSAndroid Build Coastguard Worker         array_028();
84*795d594fSAndroid Build Coastguard Worker     }
85*795d594fSAndroid Build Coastguard Worker }
86