1 /*
2 * Copyright (c) 2018, 2020, 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 import jdk.internal.platform.MetricsCgroupV1;
27
28 public class MetricsMemoryTester {
29 public static void main(String[] args) {
30 System.out.println(Arrays.toString(args));
31 switch (args[0]) {
32 case "memory":
33 testMemoryLimit(args[1]);
34 break;
35 case "memoryswap":
36 testMemoryAndSwapLimit(args[1], args[2]);
37 break;
38 case "kernelmem":
39 testKernelMemoryLimit(args[1]);
40 break;
41 case "oomkill":
42 testOomKillFlag(Boolean.parseBoolean(args[2]));
43 break;
44 case "failcount":
45 testMemoryFailCount();
46 break;
47 case "softlimit":
48 testMemorySoftLimit(args[1]);
49 break;
50 }
51 }
52
53 private static void testMemoryLimit(String value) {
54 long limit = getMemoryValue(value);
55
56 if (limit != Metrics.systemMetrics().getMemoryLimit()) {
57 throw new RuntimeException("Memory limit not equal, expected : ["
58 + limit + "]" + ", got : ["
59 + Metrics.systemMetrics().getMemoryLimit() + "]");
60 }
61 System.out.println("TEST PASSED!!!");
62 }
63
64 private static void testMemoryFailCount() {
65 long count = Metrics.systemMetrics().getMemoryFailCount();
66
67 // Allocate 512M of data
68 byte[][] bytes = new byte[64][];
69 boolean atLeastOneAllocationWorked = false;
70 for (int i = 0; i < 64; i++) {
71 try {
72 bytes[i] = new byte[8 * 1024 * 1024];
73 atLeastOneAllocationWorked = true;
74 // Break out as soon as we see an increase in failcount
75 // to avoid getting killed by the OOM killer.
76 if (Metrics.systemMetrics().getMemoryFailCount() > count) {
77 break;
78 }
79 } catch (Error e) { // OOM error
80 break;
81 }
82 }
83 if (!atLeastOneAllocationWorked) {
84 System.out.println("Allocation failed immediately. Ignoring test!");
85 return;
86 }
87 // Be sure bytes allocations don't get optimized out
88 System.out.println("DEBUG: Bytes allocation length 1: " + bytes[0].length);
89 if (Metrics.systemMetrics().getMemoryFailCount() <= count) {
90 throw new RuntimeException("Memory fail count : new : ["
91 + Metrics.systemMetrics().getMemoryFailCount() + "]"
92 + ", old : [" + count + "]");
93 }
94 System.out.println("TEST PASSED!!!");
95 }
96
97 private static void testMemorySoftLimit(String softLimit) {
98
99 long memorySoftLimit = Metrics.systemMetrics().getMemorySoftLimit();
100 long newmemorySoftLimit = getMemoryValue(softLimit);
101
102 if (newmemorySoftLimit != memorySoftLimit) {
103 throw new RuntimeException("Memory softlimit not equal, Actual : ["
104 + newmemorySoftLimit + "]" + ", Expected : ["
105 + memorySoftLimit + "]");
106 }
107 System.out.println("TEST PASSED!!!");
108 }
109
110 private static void testKernelMemoryLimit(String value) {
111 Metrics m = Metrics.systemMetrics();
112 if (m instanceof MetricsCgroupV1) {
113 MetricsCgroupV1 mCgroupV1 = (MetricsCgroupV1)m;
114 System.out.println("TEST PASSED!!!");
115 long limit = getMemoryValue(value);
116 long kmemlimit = mCgroupV1.getKernelMemoryLimit();
117 if (kmemlimit != 0 && limit != kmemlimit) {
118 throw new RuntimeException("Kernel Memory limit not equal, expected : ["
119 + limit + "]" + ", got : ["
120 + kmemlimit + "]");
121 }
122 } else {
123 throw new RuntimeException("oomKillFlag test not supported for cgroups v2");
124 }
125 }
126
127 private static void testMemoryAndSwapLimit(String memory, String memAndSwap) {
128 long expectedMem = getMemoryValue(memory);
129 long expectedMemAndSwap = getMemoryValue(memAndSwap);
130
131 if (expectedMem != Metrics.systemMetrics().getMemoryLimit()
132 || expectedMemAndSwap != Metrics.systemMetrics().getMemoryAndSwapLimit()) {
133 System.err.println("Memory and swap limit not equal, expected : ["
134 + expectedMem + ", " + expectedMemAndSwap + "]"
135 + ", got : [" + Metrics.systemMetrics().getMemoryLimit()
136 + ", " + Metrics.systemMetrics().getMemoryAndSwapLimit() + "]");
137 }
138 System.out.println("TEST PASSED!!!");
139 }
140
141 private static long getMemoryValue(String value) {
142 long result;
143 if (value.endsWith("m")) {
144 result = Long.parseLong(value.substring(0, value.length() - 1))
145 * 1024 * 1024;
146 } else if (value.endsWith("g")) {
147 result = Long.parseLong(value.substring(0, value.length() - 1))
148 * 1024 * 1024 * 1024;
149 } else {
150 result = Long.parseLong(value);
151 }
152 return result;
153 }
154
155 private static void testOomKillFlag(boolean oomKillFlag) {
156 Metrics m = Metrics.systemMetrics();
157 if (m instanceof MetricsCgroupV1) {
158 MetricsCgroupV1 mCgroupV1 = (MetricsCgroupV1)m;
159 Boolean expected = Boolean.valueOf(oomKillFlag);
160 Boolean actual = mCgroupV1.isMemoryOOMKillEnabled();
161 if (!(expected.equals(actual))) {
162 throw new RuntimeException("oomKillFlag error");
163 }
164 System.out.println("TEST PASSED!!!");
165 } else {
166 throw new RuntimeException("oomKillFlag test not supported for cgroups v2");
167 }
168 }
169 }