Package one.nio.os.perf

Class PerfCounter

java.lang.Object

one.nio.os.perf.PerfCounter

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

PerfCounterGlobal

public class PerfCounter
extends java.lang.Object
implements java.io.Closeable

Field Summary

Fields

Modifier and Type	Field	Description
private PerfEvent	event
(package private) int	fd
(package private) static java.util.concurrent.atomic.AtomicIntegerFieldUpdater<PerfCounter>	fdUpdater
protected long	readFormat
private RingBuffer	ringBuffer

Constructor Summary

Constructors

Constructor	Description
PerfCounter(PerfEvent event, RingBuffer ringBuffer, long readFormat, int fd)

Method Summary

Modifier and Type	Method	Description
void	attachBpf(int fd)
void	close()
void	disable()
void	enable()
PerfEvent	event()
long	get()
protected long[]	getRawValue()
CounterValue	getValue()
boolean	hasReadFormat(int readFormat)
(package private) void	ioctl(int cmd, int arg)
protected long[]	newBuffer()
PerfSample	nextSample()
void	refresh(int count)
void	reset()
protected LocalValue	toValue(long[] raw)

Methods inherited from class java.lang.Object

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

Field Detail

event

private final PerfEvent event

ringBuffer

private final RingBuffer ringBuffer

readFormat

protected final long readFormat

fd

volatile int fd

fdUpdater

static final java.util.concurrent.atomic.AtomicIntegerFieldUpdater<PerfCounter> fdUpdater

Constructor Detail

PerfCounter

PerfCounter(PerfEvent event,
            RingBuffer ringBuffer,
            long readFormat,
            int fd)

Method Detail

event

public final PerfEvent event()

close

public void close()

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

get

public long get()
         throws java.io.IOException

Throws:

java.io.IOException

getValue

public CounterValue getValue()
                      throws java.io.IOException

Throws:

java.io.IOException

getRawValue

protected long[] getRawValue()
                      throws java.io.IOException

Throws:

java.io.IOException

newBuffer

protected long[] newBuffer()

toValue

protected LocalValue toValue(long[] raw)

hasReadFormat

public boolean hasReadFormat(int readFormat)

nextSample

public PerfSample nextSample()

reset

public void reset()
           throws java.io.IOException

Throws:

java.io.IOException

attachBpf

public void attachBpf(int fd)
               throws java.io.IOException

Throws:

java.io.IOException

enable

public void enable()
            throws java.io.IOException

Throws:

java.io.IOException

disable

public void disable()
             throws java.io.IOException

Throws:

java.io.IOException

refresh

public void refresh(int count)
             throws java.io.IOException

Throws:

java.io.IOException

ioctl

void ioctl(int cmd,
           int arg)
    throws java.io.IOException

Throws:

java.io.IOException