8223438: add VirtualizationInformation JFR event

Reviewed-by: clanger, egahlin

src/hotspot/cpu/ppc/vm_version_ppc.cpp

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2018, SAP SE. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2019 SAP SE. 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
@@ -382,6 +382,50 @@ void VM_Version::initialize() {
   if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
     FLAG_SET_DEFAULT(UseUnalignedAccesses, true);
   }
+
+  check_virtualizations();
+}
+
+void VM_Version::check_virtualizations() {
+#if defined(_AIX)
+  int rc = 0;
+  perfstat_partition_total_t pinfo;
+  rc = perfstat_partition_total(NULL, &pinfo, sizeof(perfstat_partition_total_t), 1);
+  if (rc == 1) {
+    Abstract_VM_Version::_detected_virtualization = PowerVM;
+  }
+#else
+  const char* info_file = "/proc/ppc64/lparcfg";
+  // system_type=...qemu indicates PowerKVM
+  // e.g. system_type=IBM pSeries (emulated by qemu)
+  char line[500];
+  FILE* fp = fopen(info_file, "r");
+  if (fp == NULL) {
+    return;
+  }
+  const char* system_type="system_type=";  // in case this line contains qemu, it is KVM
+  const char* num_lpars="NumLpars="; // in case of non-KVM : if this line is found it is PowerVM
+  bool num_lpars_found = false;
+
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    if (strncmp(line, system_type, strlen(system_type)) == 0) {
+      if (strstr(line, "qemu") != 0) {
+        Abstract_VM_Version::_detected_virtualization = PowerKVM;
+        fclose(fp);
+        return;
+      }
+    }
+    if (strncmp(line, num_lpars, strlen(num_lpars)) == 0) {
+      num_lpars_found = true;
+    }
+  }
+  if (num_lpars_found) {
+    Abstract_VM_Version::_detected_virtualization = PowerVM;
+  } else {
+    Abstract_VM_Version::_detected_virtualization = PowerFullPartitionMode;
+  }
+  fclose(fp);
+#endif
 }
 
 void VM_Version::print_platform_virtualization_info(outputStream* st) {

src/hotspot/cpu/ppc/vm_version_ppc.hpp

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2018 SAP SE. All rights reserved.
+ * Copyright (c) 2012, 2019 SAP SE. 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
@@ -87,6 +87,7 @@ protected:
 public:
   // Initialization
   static void initialize();
+  static void check_virtualizations();
 
   // Override Abstract_VM_Version implementation
   static void print_platform_virtualization_info(outputStream*);

src/hotspot/share/jfr/metadata/metadata.xml

@@ -615,6 +615,10 @@
     <Field type="string" name="osVersion" label="OS Version" />
   </Event>
 
+  <Event name="VirtualizationInformation" category="Operating System" label="Virtualization Information" period="endChunk">
+    <Field type="string" name="name" label="Name" />
+  </Event>
+
   <Event name="InitialSystemProperty" category="Java Virtual Machine" label="Initial System Property" description="System Property at JVM start" period="endChunk">
     <Field type="string" name="key" label="Key" />
     <Field type="string" name="value" label="Value" />

src/hotspot/share/jfr/periodic/jfrOSInterface.cpp

@@ -215,6 +215,27 @@ int JfrOSInterface::os_version(char** os_version) {
   return instance()._impl->os_version(os_version);
 }
 
+const char* JfrOSInterface::virtualization_name() {
+  VirtualizationType vrt = VM_Version::get_detected_virtualization();
+  if (vrt == XenHVM) {
+    return "Xen hardware-assisted virtualization";
+  } else if (vrt == KVM) {
+    return "KVM virtualization";
+  } else if (vrt == VMWare) {
+    return "VMWare virtualization";
+  } else if (vrt == HyperV) {
+    return "HyperV virtualization";
+  } else if (vrt == PowerVM) {
+    return "PowerVM virtualization";
+  } else if (vrt == PowerKVM) {
+    return "Power KVM virtualization";
+  } else if (vrt == PowerFullPartitionMode) {
+    return "Power full partition";
+  }
+
+  return "No virtualization detected";
+}
+
 int JfrOSInterface::generate_initial_environment_variable_events() {
   if (environ == NULL) {
     return OS_ERR;

src/hotspot/share/jfr/periodic/jfrOSInterface.hpp

@@ -52,6 +52,7 @@ class JfrOSInterface: public JfrCHeapObj {
   static int cpu_load_total_process(double* cpu_load);
   static int cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad);
   static int os_version(char** os_version);
+  static const char* virtualization_name();
   static int generate_initial_environment_variable_events();
   static int system_processes(SystemProcess** system_processes, int* no_of_sys_processes);
   static int network_utilization(NetworkInterface** network_interfaces);

src/hotspot/share/jfr/periodic/jfrPeriodic.cpp

@@ -95,6 +95,12 @@ TRACE_REQUEST_FUNC(OSInformation) {
   event.commit();
 }
 
+TRACE_REQUEST_FUNC(VirtualizationInformation) {
+  EventVirtualizationInformation event;
+  event.set_name(JfrOSInterface::virtualization_name());
+  event.commit();
+}
+
 TRACE_REQUEST_FUNC(ModuleRequire) {
   JfrModuleEvent::generate_module_dependency_events();
 }

src/hotspot/share/runtime/vm_version.hpp

@@ -34,7 +34,10 @@ typedef enum {
   XenHVM,
   KVM,
   VMWare,
-  HyperV
+  HyperV,
+  PowerVM, // on AIX or Linux ppc64(le)
+  PowerFullPartitionMode, // on Linux ppc64(le)
+  PowerKVM
 } VirtualizationType;
 
 // VM_Version provides information about the VM.

src/jdk.jfr/share/conf/jfr/default.jfc

@@ -513,6 +513,11 @@
       <setting name="period">beginChunk</setting>
     </event>
 
+    <event name="jdk.VirtualizationInformation">
+     <setting name="enabled">true</setting>
+     <setting name="period">beginChunk</setting>
+    </event>
+
     <event name="jdk.CPUInformation">
       <setting name="enabled">true</setting>
       <setting name="period">beginChunk</setting>

src/jdk.jfr/share/conf/jfr/profile.jfc

@@ -513,6 +513,11 @@
       <setting name="period">beginChunk</setting>
     </event>
 
+    <event name="jdk.VirtualizationInformation">
+     <setting name="enabled">true</setting>
+     <setting name="period">beginChunk</setting>
+    </event>
+
     <event name="jdk.CPUInformation">
       <setting name="enabled">true</setting>
       <setting name="period">beginChunk</setting>

test/jdk/jdk/jfr/event/os/TestVirtualizationInfo.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2013, 2019, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package jdk.jfr.event.os;
+
+import java.util.List;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.test.lib.jfr.EventNames;
+import jdk.test.lib.jfr.Events;
+
+/**
+ * @test
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.event.os.TestVirtualizationInfo
+ */
+public class TestVirtualizationInfo {
+    private final static String EVENT_NAME = EventNames.VirtualizationInformation;
+
+    public static void main(String[] args) throws Throwable {
+        Recording recording = new Recording();
+        recording.enable(EVENT_NAME);
+        recording.start();
+        recording.stop();
+        List<RecordedEvent> events = Events.fromRecording(recording);
+        Events.hasEvents(events);
+        for (RecordedEvent event : events) {
+            System.out.println("Event: " + event);
+            Events.assertField(event, "name").notEmpty();
+        }
+    }
+}

test/lib/jdk/test/lib/jfr/EventNames.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2019, 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
@@ -154,6 +154,7 @@ public class EventNames {
 
     // OS
     public final static String OSInformation = PREFIX + "OSInformation";
+    public final static String VirtualizationInformation = PREFIX + "VirtualizationInformation";
     public final static String CPUInformation = PREFIX + "CPUInformation";
     public final static String CPULoad = PREFIX + "CPULoad";
     public final static String ThreadCPULoad = PREFIX + "ThreadCPULoad";