author | ehelin |
Mon, 27 Nov 2017 10:51:31 +0100 | |
changeset 48117 | d64722b0b371 |
permissions | -rw-r--r-- |
48117
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/* |
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* Copyright (c) 2013, 2016, 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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package gc.testlibrary; |
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|
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import sun.jvmstat.monitor.Monitor; |
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import sun.jvmstat.monitor.MonitorException; |
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import sun.jvmstat.monitor.MonitoredHost; |
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import sun.jvmstat.monitor.MonitoredVm; |
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import sun.jvmstat.monitor.VmIdentifier; |
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import jdk.test.lib.process.ProcessTools; |
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/** |
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* PerfCounters can be used to get a performance counter from the currently |
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* executing VM. |
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* |
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* Throws a runtime exception if an error occurs while communicating with the |
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* currently executing VM. |
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*/ |
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public class PerfCounters { |
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private final static MonitoredVm vm; |
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static { |
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try { |
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String pid = Long.toString(ProcessTools.getProcessId()); |
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VmIdentifier vmId = new VmIdentifier(pid); |
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MonitoredHost host = MonitoredHost.getMonitoredHost(vmId); |
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vm = host.getMonitoredVm(vmId); |
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} catch (Exception e) { |
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throw new RuntimeException("Could not connect to the VM"); |
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} |
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} |
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/** |
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* Returns the performance counter with the given name. |
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* |
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* @param name The name of the performance counter. |
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* @throws IllegalArgumentException If no counter with the given name exists. |
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* @throws MonitorException If an error occurs while communicating with the VM. |
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* @return The performance counter with the given name. |
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*/ |
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public static PerfCounter findByName(String name) |
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throws MonitorException, IllegalArgumentException { |
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Monitor m = vm.findByName(name); |
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if (m == null) { |
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throw new IllegalArgumentException("Did not find a performance counter with name " + name); |
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} |
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return new PerfCounter(m, name); |
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} |
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} |