hotspot/test/serviceability/tmtools/jstat/GcCauseTest01.java
author akulyakh
Thu, 21 Jan 2016 14:17:49 +0300
changeset 35535 82db90419728
parent 35493 863fb33f9940
child 35945 f532c5c62540
permissions -rw-r--r--
8147848: [TESTBUG] tmtools tests ported to JTREG need to be quarantined Summary: Quarantined some tests with false failures Reviewed-by: sla
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/*
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 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @summary Test checks output displayed with jstat -gccause.
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 *          Test scenario:
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 *          test several times provokes garbage collection in the debuggee application and after each garbage
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 *          collection runs jstat. jstat should show that after garbage collection number of GC events and garbage
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 *          collection time increase.
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 * @library /test/lib/share/classes
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 * @library ../share
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 * @ignore 8147848
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 * @build common.*
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 * @build utils.*
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 *
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 * @run main/othervm -XX:+UsePerfData GcCauseTest01
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 */
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import utils.*;
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public class GcCauseTest01 {
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    public static void main(String[] args) throws Exception {
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        // We will be running "jstat -gc" tool
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        JstatGcCauseTool jstatGcTool = new JstatGcCauseTool(ProcessHandle.current().getPid());
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        // Run once and get the  results asserting that they are reasonable
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        JstatGcCauseResults measurement1 = jstatGcTool.measure();
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        measurement1.assertConsistency();
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        GcProvoker gcProvoker = GcProvoker.createGcProvoker();
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        // Provoke GC then run the tool again and get the results  asserting that they are reasonable
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        gcProvoker.provokeGc();
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        JstatGcCauseResults measurement2 = jstatGcTool.measure();
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        measurement2.assertConsistency();
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        // Assert the increase in GC events and time between the measurements
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        JstatResults.assertGCEventsIncreased(measurement1, measurement2);
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        JstatResults.assertGCTimeIncreased(measurement1, measurement2);
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        // Provoke GC 3rd time then run the tool 3rd time twice and get the results
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        // asserting that they are reasonable
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        gcProvoker.provokeGc();
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        JstatGcCauseResults measurement3 = jstatGcTool.measure();
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        measurement3.assertConsistency();
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        // Assert the increase in GC events and time between the measurements
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        JstatResults.assertGCEventsIncreased(measurement2, measurement3);
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        JstatResults.assertGCTimeIncreased(measurement2, measurement3);
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    }
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}