--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/src/hotspot/share/runtime/os_perf.hpp	2018-04-09 15:32:16.052421174 +0200
@@ -0,0 +1,237 @@
+/*
+ * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_RUNTIME_OS_PERF_HPP
+#define SHARE_VM_RUNTIME_OS_PERF_HPP
+
+#include "utilities/macros.hpp"
+#include "memory/allocation.inline.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+#define FUNCTIONALITY_NOT_IMPLEMENTED -8
+
+class EnvironmentVariable : public CHeapObj<mtInternal> {
+ public:
+  char* _key;
+  char* _value;
+
+  EnvironmentVariable() {
+    _key = NULL;
+    _value = NULL;
+  }
+
+  ~EnvironmentVariable() {
+    if (_key != NULL) {
+      FREE_C_HEAP_ARRAY(char, _key);
+    }
+    if (_value != NULL) {
+      FREE_C_HEAP_ARRAY(char, _value);
+    }
+  }
+
+  EnvironmentVariable(char* key, char* value) {
+    _key = key;
+    _value = value;
+  }
+
+};
+
+
+class CPUInformation : public CHeapObj<mtInternal> {
+ private:
+  int   _no_of_sockets;
+  int   _no_of_cores;
+  int   _no_of_hw_threads;
+  const char* _description;
+  const char* _name;
+
+ public:
+  CPUInformation() {
+    _no_of_sockets = 0;
+    _no_of_cores = 0;
+    _no_of_hw_threads = 0;
+    _description = NULL;
+    _name = NULL;
+  }
+
+  int number_of_sockets(void) const {
+    return _no_of_sockets;
+  }
+
+  void set_number_of_sockets(int no_of_sockets) {
+    _no_of_sockets = no_of_sockets;
+  }
+
+  int number_of_cores(void) const {
+    return _no_of_cores;
+  }
+
+  void set_number_of_cores(int no_of_cores) {
+    _no_of_cores = no_of_cores;
+  }
+
+  int number_of_hardware_threads(void) const {
+    return _no_of_hw_threads;
+  }
+
+  void set_number_of_hardware_threads(int no_of_hw_threads) {
+    _no_of_hw_threads = no_of_hw_threads;
+  }
+
+  const char* cpu_name(void)  const {
+    return _name;
+  }
+
+  void set_cpu_name(const char* cpu_name) {
+    _name = cpu_name;
+  }
+
+  const char* cpu_description(void) const {
+    return _description;
+  }
+
+  void set_cpu_description(const char* cpu_description) {
+    _description = cpu_description;
+  }
+};
+
+class SystemProcess : public CHeapObj<mtInternal> {
+ private:
+  int   _pid;
+  char* _name;
+  char* _path;
+  char* _command_line;
+  SystemProcess* _next;
+
+ public:
+  SystemProcess() {
+    _pid  = 0;
+    _name = NULL;
+    _path = NULL;
+    _command_line = NULL;
+    _next = NULL;
+  }
+
+  SystemProcess(int pid, char* name, char* path, char* command_line, SystemProcess* next) {
+    _pid = pid;
+    _name = name;
+    _path = path;
+    _command_line = command_line;
+    _next = next;
+  }
+
+  void set_next(SystemProcess* sys_process) {
+    _next = sys_process;
+  }
+
+  SystemProcess* next(void) const {
+    return _next;
+  }
+
+  int pid(void) const {
+    return _pid;
+  }
+
+  void set_pid(int pid) {
+    _pid = pid;
+  }
+
+  const char* name(void) const {
+    return _name;
+  }
+
+  void set_name(char* name) {
+    _name = name;
+  }
+
+  const char* path(void) const {
+    return _path;
+  }
+
+  void set_path(char* path) {
+    _path = path;
+  }
+
+  const char* command_line(void) const {
+    return _command_line;
+  }
+
+  void set_command_line(char* command_line) {
+    _command_line = command_line;
+  }
+
+  virtual ~SystemProcess(void) {
+    if (_name != NULL) {
+      FREE_C_HEAP_ARRAY(char, _name);
+    }
+    if (_path != NULL) {
+      FREE_C_HEAP_ARRAY(char, _path);
+    }
+    if (_command_line != NULL) {
+      FREE_C_HEAP_ARRAY(char, _command_line);
+    }
+  }
+};
+
+class CPUInformationInterface : public CHeapObj<mtInternal> {
+ private:
+  CPUInformation* _cpu_info;
+ public:
+  CPUInformationInterface();
+  bool initialize();
+  ~CPUInformationInterface();
+  int cpu_information(CPUInformation& cpu_info);
+};
+
+class CPUPerformanceInterface : public CHeapObj<mtInternal> {
+ private:
+  class CPUPerformance;
+  CPUPerformance* _impl;
+ public:
+  CPUPerformanceInterface();
+  ~CPUPerformanceInterface();
+  bool initialize();
+
+  int cpu_load(int which_logical_cpu, double* const cpu_load) const;
+  int context_switch_rate(double* const rate) const;
+  int cpu_load_total_process(double* const cpu_load) const;
+  int cpu_loads_process(double* const pjvmUserLoad,
+                        double* const pjvmKernelLoad,
+                        double* const psystemTotalLoad) const;
+};
+
+class SystemProcessInterface : public CHeapObj<mtInternal> {
+ private:
+   class SystemProcesses;
+   SystemProcesses* _impl;
+ public:
+   SystemProcessInterface();
+   ~SystemProcessInterface();
+   bool initialize();
+
+  // information about system processes
+  int system_processes(SystemProcess** system_procs, int* const no_of_sys_processes) const;
+};
+
+#endif // SHARE_VM_RUNTIME_OS_PERF_HPP