1 /*
2 * Copyright (c) 2003, 2015, 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 /*
25 * @test
26 * @bug 4858522
27 * @summary Basic unit test of OperatingSystemMXBean.getTotalSwapSpaceSize()
28 *
29 * @library /lib/testlibrary
30 * @modules jdk.management
31 * @build TestTotalSwap jdk.testlibrary.*
32 * @run main TestTotalSwap
33 *
34 * @author Steve Bohne
35 * @author Jaroslav Bachorik
36 */
37
38 /*
39 * This test tests the actual swap size on linux and solaris.
40 * The correct value should be checked manually:
41 * Solaris:
42 * 1. In a shell, enter the command: "swap -l"
43 * 2. The value (reported in blocks) is in the "blocks" column.
44 * Linux:
45 * 1. In a shell, enter the command: "cat /proc/meminfo"
46 * 2. The value (reported in bytes) is in "Swap" entry, "total" column.
47 * Windows NT/XP/2000:
48 * 1. Run Start->Accessories->System Tools->System Information.
49 * 2. The value (reported in Kbytes) is in the "Page File Space" entry
50 * Windows 98/ME:
51 * Unknown.
52 *
53 * Usage: GetTotalSwapSpaceSize <expected swap size | "sanity-only"> [trace]
54 */
55
56 import com.sun.management.OperatingSystemMXBean;
57 import java.lang.management.*;
58
59 import jdk.testlibrary.OSInfo;
60 import jdk.testlibrary.ProcessTools;
61 import jdk.testlibrary.OutputAnalyzer;
62
63 public class TestTotalSwap {
64
65 private static final OperatingSystemMXBean mbean =
66 (com.sun.management.OperatingSystemMXBean)
67 ManagementFactory.getOperatingSystemMXBean();
68
69 // Careful with these values.
70 // Min size for pass dynamically determined below.
71 // zero if no swap space is configured.
72 private static long min_size_for_pass = 0;
73 private static final long MAX_SIZE_FOR_PASS = Long.MAX_VALUE;
74
75 public static void main(String args[]) throws Throwable {
76
77 long expected_swap_size = getSwapSizeFromOs();
78
79 long min_size = mbean.getFreeSwapSpaceSize();
80 if (min_size > 0) {
81 min_size_for_pass = min_size;
82 }
83
84 long size = mbean.getTotalSwapSpaceSize();
85
86 System.out.println("Total swap space size in bytes: " + size);
87
88 if (expected_swap_size > -1) {
89 if (size != expected_swap_size) {
90 throw new RuntimeException("Expected total swap size : " +
91 expected_swap_size +
92 " but getTotalSwapSpaceSize returned: " +
93 size);
94 }
95 }
96
97 // sanity check
98 if (size < min_size_for_pass || size > MAX_SIZE_FOR_PASS) {
99 throw new RuntimeException("Total swap space size " +
100 "illegal value: " + size + " bytes " +
101 "(MIN = " + min_size_for_pass + "; " +
102 "MAX = " + MAX_SIZE_FOR_PASS + ")");
103 }
104
105 System.out.println("Test passed.");
106 }
107
108 private static long getSwapSizeFromOs() throws Throwable {
109 OSInfo.OSType os = OSInfo.getOSType();
110
111 switch (os) {
112 // total used free shared buffers cached
113 // Mem: 16533540864 13638467584 2895073280 534040576 1630248960 6236909568
114 // -/+ buffers/cache: 5771309056 10762231808
115 // Swap: 15999168512 0 15999168512
116
117 case LINUX: {
118 String swapSizeStr = ProcessTools.executeCommand("free", "-b")
119 .firstMatch("Swap:\\s+([0-9]+)\\s+.*", 1);
120 return Long.parseLong(swapSizeStr);
121 }
122 case SOLARIS: {
123 // swapfile dev swaplo blocks free
124 // /dev/dsk/c0t0d0s1 136,1 16 1638608 1600528
125 OutputAnalyzer out= ProcessTools.executeCommand(
126 "/usr/sbin/swap",
127 "-l"
128 );
129
130 long swapSize = 0;
131
132 for (String line : out.asLines()) {
133 if (line.contains("swapfile")) continue;
134
135 String[] vals = line.split("\\s+");
136 if (vals.length == 5) {
137 swapSize += Long.parseLong(vals[3]) * 512; // size is reported in 512b blocks
138 }
139 }
140
141 return swapSize;
142 }
143 case MACOSX: {
144 // total = 8192.00M used = 7471.11M free = 720.89M (encrypted)
145 String swapSizeStr = ProcessTools.executeCommand(
146 "/usr/sbin/sysctl",
147 "-n",
148 "vm.swapusage"
149 ).firstMatch("total\\s+=\\s+([0-9]+(\\.[0-9]+)?[Mm]?).*", 1);
150 if (swapSizeStr.toLowerCase().endsWith("m")) {
151 swapSizeStr = swapSizeStr.substring(0, swapSizeStr.length() - 1);
152 return (long)(Double.parseDouble(swapSizeStr) * 1024 * 1024); // size in MB
153 }
154 return (long)(Double.parseDouble(swapSizeStr) * 1024 * 1024);
155 }
156 default: {
157 System.err.println("Unsupported operating system: " + os);
158 }
159 }
160
161 return -1;
162 }
163 }