1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 import java.util.Arrays;
25 import jdk.internal.platform.Metrics;
26
27 public class MetricsMemoryTester {
28 public static void main(String[] args) {
29 System.out.println(Arrays.toString(args));
30 switch (args[0]) {
31 case "memory":
32 testMemoryLimit(args[1]);
33 break;
34 case "memoryswap":
35 testMemoryAndSwapLimit(args[1], args[2]);
36 break;
37 case "kernelmem":
38 testKernelMemoryLimit(args[1]);
39 break;
40 case "oomkill":
41 testOomKillFlag(Boolean.parseBoolean(args[2]));
42 break;
43 case "failcount":
44 testMemoryFailCount();
45 break;
46 case "softlimit":
47 testMemorySoftLimit(args[1]);
48 break;
49 }
50 }
51
52 private static void testMemoryLimit(String value) {
53 long limit = getMemoryValue(value);
54
55 if (limit != Metrics.systemMetrics().getMemoryLimit()) {
56 throw new RuntimeException("Memory limit not equal, expected : ["
57 + limit + "]" + ", got : ["
58 + Metrics.systemMetrics().getMemoryLimit() + "]");
59 }
60 System.out.println("TEST PASSED!!!");
61 }
62
63 private static void testMemoryFailCount() {
64 long count = Metrics.systemMetrics().getMemoryFailCount();
65
66 // Allocate 512M of data
67 byte[][] bytes = new byte[64][];
68 boolean atLeastOneAllocationWorked = false;
69 for (int i = 0; i < 64; i++) {
70 try {
71 bytes[i] = new byte[8 * 1024 * 1024];
72 atLeastOneAllocationWorked = true;
73 // Break out as soon as we see an increase in failcount
74 // to avoid getting killed by the OOM killer.
75 if (Metrics.systemMetrics().getMemoryFailCount() > count) {
76 break;
77 }
78 } catch (Error e) { // OOM error
79 break;
80 }
81 }
82 if (!atLeastOneAllocationWorked) {
83 System.out.println("Allocation failed immediately. Ignoring test!");
84 return;
85 }
86 // Be sure bytes allocations don't get optimized out
87 System.out.println("DEBUG: Bytes allocation length 1: " + bytes[0].length);
88 if (Metrics.systemMetrics().getMemoryFailCount() <= count) {
89 throw new RuntimeException("Memory fail count : new : ["
90 + Metrics.systemMetrics().getMemoryFailCount() + "]"
91 + ", old : [" + count + "]");
92 }
93 System.out.println("TEST PASSED!!!");
94 }
95
96 private static void testMemorySoftLimit(String softLimit) {
97
98 long memorySoftLimit = Metrics.systemMetrics().getMemorySoftLimit();
99 long newmemorySoftLimit = getMemoryValue(softLimit);
100
101 if (newmemorySoftLimit != memorySoftLimit) {
102 throw new RuntimeException("Memory softlimit not equal, Actual : ["
103 + newmemorySoftLimit + "]" + ", Expected : ["
104 + memorySoftLimit + "]");
105 }
106 System.out.println("TEST PASSED!!!");
107 }
108
109 private static void testKernelMemoryLimit(String value) {
110 long limit = getMemoryValue(value);
111 long kmemlimit = Metrics.systemMetrics().getKernelMemoryLimit();
112 if (kmemlimit != 0 && limit != kmemlimit) {
113 throw new RuntimeException("Kernel Memory limit not equal, expected : ["
114 + limit + "]" + ", got : ["
115 + kmemlimit + "]");
116 }
117 System.out.println("TEST PASSED!!!");
118 }
119
120 private static void testMemoryAndSwapLimit(String memory, String memAndSwap) {
121 long expectedMem = getMemoryValue(memory);
122 long expectedMemAndSwap = getMemoryValue(memAndSwap);
123
124 if (expectedMem != Metrics.systemMetrics().getMemoryLimit()
125 || expectedMemAndSwap != Metrics.systemMetrics().getMemoryAndSwapLimit()) {
126 System.err.println("Memory and swap limit not equal, expected : ["
127 + expectedMem + ", " + expectedMemAndSwap + "]"
128 + ", got : [" + Metrics.systemMetrics().getMemoryLimit()
129 + ", " + Metrics.systemMetrics().getMemoryAndSwapLimit() + "]");
130 }
131 System.out.println("TEST PASSED!!!");
132 }
133
134 private static long getMemoryValue(String value) {
135 long result;
136 if (value.endsWith("m")) {
137 result = Long.parseLong(value.substring(0, value.length() - 1))
138 * 1024 * 1024;
139 } else if (value.endsWith("g")) {
140 result = Long.parseLong(value.substring(0, value.length() - 1))
141 * 1024 * 1024 * 1024;
142 } else {
143 result = Long.parseLong(value);
144 }
145 return result;
146 }
147
148 private static void testOomKillFlag(boolean oomKillFlag) {
149 if (!(oomKillFlag ^ Metrics.systemMetrics().isMemoryOOMKillEnabled())) {
150 throw new RuntimeException("oomKillFlag error");
151 }
152 System.out.println("TEST PASSED!!!");
153 }
154 }