1 /*

     2  * Copyright (c) 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  * Results of running the JstatGcTool ("jstat -gcnew <pid>")

    26  *

    27  * Output example:

    28  * S0C           S1C         S0U    S1U   TT   MTT  DSS      EC                EU       YGC     YGCT

    29  * 11264.0  11264.0    0.0    0.0      15  15       0.0      67584.0   1351.7      0      0.000

    30 

    31  * Output description:

    32  * S0C     Current survivor space 0 capacity (KB).

    33  * S1C     Current survivor space 1 capacity (KB).

    34  * S0U     Survivor space 0 utilization (KB).

    35  * S1U     Survivor space 1 utilization (KB).

    36  * TT        Tenuring threshold.

    37  * MTT     Maximum tenuring threshold.

    38  * DSS     Desired survivor size (KB).

    39  * EC        Current eden space capacity (KB).

    40  * EU        Eden space utilization (KB).

    41  * YGC     Number of young generation GC events.

    42  * YGCT   Young generation garbage collection time.

    43  */

    44 package utils;

    45 

    46 import common.ToolResults;

    47 

    48 public class JstatGcNewResults extends JstatResults {

    49 

    50     public JstatGcNewResults(ToolResults rawResults) {

    51         super(rawResults);

    52     }

    53 

    54     /**

    55      * Checks the overall consistency of the results reported by the tool

    56      */

    57     public void assertConsistency() {

    58 

    59         assertThat(getExitCode() == 0, "Unexpected exit code: " + getExitCode());

    60 

    61         float S0C = getFloatValue("S0C");

    62         float S0U = getFloatValue("S0U");

    63 

    64         assertThat(S0U <= S0C, "S0U > S0C (utilization > capacity)");

    65 

    66         float S1C = getFloatValue("S1C");

    67         float S1U = getFloatValue("S1U");

    68 

    69         assertThat(S1U <= S1C, "S1U > S1C (utilization > capacity)");

    70 

    71         float EC = getFloatValue("EC");

    72         float EU = getFloatValue("EU");

    73 

    74         assertThat(EU <= EC, "EU > EC (utilization > capacity)");

    75 

    76         int YGC = getIntValue("YGC");

    77         float YGCT = getFloatValue("YGCT");

    78 

    79         if (YGC > 0) {

    80             assertThat(YGCT > 0, "Number of young generation GC Events is " + YGC + ", but YGCT is 0");

    81         }

    82 

    83         int TT = getIntValue("TT");

    84         int MTT = getIntValue("MTT");

    85         assertThat(TT <= MTT, "TT > MTT (tenuring threshold > maximum tenuring threshold)");

    86     }

    87 

    88     private void assertThat(boolean b, String message) {

    89         if (!b) {

    90             throw new RuntimeException(message);

    91         }

    92     }

    93 }