1 /* 2 * Copyright (c) 2012, 2018, 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 #ifndef SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP 26 #define SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP 27 28 #include "jfr/utilities/jfrAllocation.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 31 class CPUInformation; 32 class EnvironmentVariable; 33 class SystemProcess; 34 35 class JfrOSInterface: public JfrCHeapObj { 36 friend class JfrRecorder; 37 private: 38 class JfrOSInterfaceImpl; 39 JfrOSInterfaceImpl* _impl; 40 41 JfrOSInterface(); 42 ~JfrOSInterface(); 43 bool initialize(); 44 static JfrOSInterface& instance(); 45 static JfrOSInterface* create(); 46 static void destroy(); 47 48 public: 49 static int cpu_information(CPUInformation& cpu_info); 50 static int cpu_load(int which_logical_cpu, double* cpu_load); 51 static int context_switch_rate(double* rate); 52 static int cpu_load_total_process(double* cpu_load); 53 static int cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad); 54 static int os_version(char** os_version); 55 static int generate_initial_environment_variable_events(); 56 static int system_processes(SystemProcess** system_processes, int* no_of_sys_processes); 57 }; 58 59 #endif // SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP