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