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 }