org.graalvm.compiler.hotspot.debug

Class BenchmarkCounters

java.lang.Object

org.graalvm.compiler.hotspot.debug.BenchmarkCounters

public class BenchmarkCounters
extends Object

This class contains infrastructure to maintain counters based on DynamicCounterNodes. The infrastructure is enabled by specifying either the GenericDynamicCounters or BenchmarkDynamicCounters option.

The counters are kept in a special area allocated for each native JavaThread object, and the number of counters is configured using -XX:JVMCICounterSize=value. -XX:+/-JVMCICountersExcludeCompiler configures whether to exclude compiler threads (defaults to true). The subsystems that use the logging need to have their own options to turn on the counters, and insert DynamicCounterNodes when they're enabled. Counters will be displayed as a rate (per second) if their group name starts with "~", otherwise they will be displayed as a total number. See here for a detailed example of how to use benchmark counters.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BenchmarkCounters.Options

Field Summary

Fields

Modifier and Type	Field and Description
static ConcurrentHashMap<String,org.graalvm.compiler.hotspot.debug.BenchmarkCounters.Counter>	counterMap
static long[]	delta
static boolean	enabled

Constructor Summary

Constructors

Constructor and Description
BenchmarkCounters()

Method Summary

Modifier and Type	Method and Description
static int	getIndex(String name, String group, GraalHotSpotVMConfig config)
static int	getIndexConstantIncrement(String name, String group, GraalHotSpotVMConfig config, long increment)
static void	initialize(HotSpotJVMCIRuntime jvmciRuntime, OptionValues options)
static void	shutdown(HotSpotJVMCIRuntime jvmciRuntime, OptionValues options, long compilerStartTime)

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

enabled

public static boolean enabled

counterMap

public static final ConcurrentHashMap<String,org.graalvm.compiler.hotspot.debug.BenchmarkCounters.Counter> counterMap

delta

public static long[] delta

Constructor Detail

BenchmarkCounters

public BenchmarkCounters()

Method Detail

getIndexConstantIncrement

public static int getIndexConstantIncrement(String name,
                                            String group,
                                            GraalHotSpotVMConfig config,
                                            long increment)

getIndex

public static int getIndex(String name,
                           String group,
                           GraalHotSpotVMConfig config)

initialize

public static void initialize(HotSpotJVMCIRuntime jvmciRuntime,
                              OptionValues options)

shutdown

public static void shutdown(HotSpotJVMCIRuntime jvmciRuntime,
                            OptionValues options,
                            long compilerStartTime)