8298255: JFR provide information about dynamization of number of compiler threads

Reviewed-by: stuefe, mgronlun, egahlin

Author: MBaesken

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

@@ -937,6 +937,7 @@
   <Event name="CompilerConfiguration" category="Java Virtual Machine, Compiler" label="Compiler Configuration" thread="false" period="endChunk" startTime="false">
     <Field type="int" name="threadCount" label="Thread Count" />
     <Field type="boolean" name="tieredCompilation" label="Tiered Compilation" />
+    <Field type="boolean" name="dynamicCompilerThreadCount" label="Uses Dynamic Number of Compiler Threads" />
   </Event>
 
   <Event name="CodeCacheStatistics" category="Java Virtual Machine, Code Cache" label="Code Cache Statistics" thread="false" period="everyChunk" startTime="false">

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

@@ -588,6 +588,7 @@ TRACE_REQUEST_FUNC(CompilerConfiguration) {
   EventCompilerConfiguration event;
   event.set_threadCount(CICompilerCount);
   event.set_tieredCompilation(TieredCompilation);
+  event.set_dynamicCompilerThreadCount(UseDynamicNumberOfCompilerThreads);
   event.commit();
 }
 

test/jdk/jdk/jfr/event/compiler/TestCompilerConfig.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2022, 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
@@ -52,6 +52,7 @@ public static void main(String[] args) throws Exception {
             System.out.println("Event:" + event);
             Events.assertField(event, "threadCount").atLeast(0);
             Events.assertField(event, "tieredCompilation");
+            Events.assertField(event, "dynamicCompilerThreadCount");
         }
     }
 }

test/jdk/jdk/jfr/event/metadata/TestEventMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2022, 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
@@ -98,7 +98,7 @@ public static void main(String[] args) throws Exception {
         Set<String> eventNames= new HashSet<>();
         for (EventType eventType : eventTypes) {
             verifyEventType(eventType);
-            verifyValueDesscriptors(eventType.getFields(), types);
+            verifyValueDescriptors(eventType.getFields(), types);
             System.out.println();
             String eventName = eventType.getName();
             if (eventNames.contains(eventName)) {
@@ -116,11 +116,11 @@ public static void main(String[] args) throws Exception {
         }
     }
 
-    private static void verifyValueDesscriptors(List<ValueDescriptor> fields, Set<String> visitedTypes) {
+    private static void verifyValueDescriptors(List<ValueDescriptor> fields, Set<String> visitedTypes) {
         for (ValueDescriptor v : fields) {
             if (!visitedTypes.contains(v.getTypeName())) {
                 visitedTypes.add(v.getTypeName());
-                verifyValueDesscriptors(v.getFields(), visitedTypes);
+                verifyValueDescriptors(v.getFields(), visitedTypes);
             }
             verifyValueDescriptor(v);
         }