Class Perf

java.lang.Object

one.nio.os.perf.Perf

public class Perf
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ANY_CPU
static final int	ANY_PID
static final int	CURRENT_PID
(package private) static final int	IOCTL_DISABLE
(package private) static final int	IOCTL_ENABLE
(package private) static final int	IOCTL_ID
(package private) static final int	IOCTL_PAUSE_OUTPUT
(package private) static final int	IOCTL_PERIOD
(package private) static final int	IOCTL_REFRESH
(package private) static final int	IOCTL_RESET
(package private) static final int	IOCTL_SET_BPF
(package private) static final int	IOCTL_SET_FILTER
(package private) static final int	IOCTL_SET_OUTPUT
static final boolean	IS_SUPPORTED

Constructor Summary

Constructors

Constructor	Description
Perf()

Method Summary

Modifier and Type	Method	Description
static void	close(int fd)
private static RingBuffer	createRingBuffer(int fd, PerfOption... options)
(package private) static long	get(int fd)
(package private) static void	getValue(int fd, long[] value, int off, int len)
private static boolean	hasOption(PerfOption[] options, PerfOption option)
(package private) static void	ioctl(int fd, int cmd, int arg)
static PerfCounter	open(PerfEvent event, int pid, int cpu, PerfOption... options)
static PerfCounter	open(PerfEvent event, String cgroup, int cpu, PerfOption... options)
(package private) static int	openEvent(int pid, int cpu, int type, long config, int breakpoint, int group, String options)
static int	openFile(String fileName)
static PerfCounterGlobal	openGlobal(PerfEvent event, int pid, PerfOption... options)
private static PerfOption	option(PerfOption[] options, String name)
private static long	optionBits(PerfOption[] options, String name)
private static String	optionString(PerfOption[] options)
private static long	optionValue(PerfOption[] options, String name)

Methods inherited from class Object

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

Field Details

IS_SUPPORTED

public static final boolean IS_SUPPORTED

CURRENT_PID

public static final int CURRENT_PID

See Also:

• Constant Field Values

ANY_PID

public static final int ANY_PID

See Also:

• Constant Field Values

ANY_CPU

public static final int ANY_CPU

See Also:

• Constant Field Values

IOCTL_RESET

@Native
static final int IOCTL_RESET

See Also:

• Constant Field Values

IOCTL_ENABLE

@Native
static final int IOCTL_ENABLE

See Also:

• Constant Field Values

IOCTL_DISABLE

@Native
static final int IOCTL_DISABLE

See Also:

• Constant Field Values

IOCTL_REFRESH

@Native
static final int IOCTL_REFRESH

See Also:

• Constant Field Values

IOCTL_PERIOD

@Native
static final int IOCTL_PERIOD

See Also:

• Constant Field Values

IOCTL_SET_OUTPUT

@Native
static final int IOCTL_SET_OUTPUT

See Also:

• Constant Field Values

IOCTL_SET_FILTER

@Native
static final int IOCTL_SET_FILTER

See Also:

• Constant Field Values

IOCTL_ID

@Native
static final int IOCTL_ID

See Also:

• Constant Field Values

IOCTL_SET_BPF

@Native
static final int IOCTL_SET_BPF

See Also:

• Constant Field Values

IOCTL_PAUSE_OUTPUT

@Native
static final int IOCTL_PAUSE_OUTPUT

See Also:

• Constant Field Values

Constructor Details

Perf

public Perf()

Method Details

open

public static PerfCounter open(PerfEvent event,
 int pid,
 int cpu,
 PerfOption... options)
                        throws IOException

Throws:

IOException

open

public static PerfCounter open(PerfEvent event,
 String cgroup,
 int cpu,
 PerfOption... options)
                        throws IOException

Throws:

IOException

openGlobal

public static PerfCounterGlobal openGlobal(PerfEvent event,
 int pid,
 PerfOption... options)
                                    throws IOException

Throws:

IOException

createRingBuffer

private static RingBuffer createRingBuffer(int fd,
 PerfOption... options)
                                    throws IOException

Throws:

IOException

optionString

private static String optionString(PerfOption[] options)

optionValue

private static long optionValue(PerfOption[] options,
 String name)

option

private static PerfOption option(PerfOption[] options,
 String name)

optionBits

private static long optionBits(PerfOption[] options,
 String name)

hasOption

private static boolean hasOption(PerfOption[] options,
 PerfOption option)

openEvent

static int openEvent(int pid,
 int cpu,
 int type,
 long config,
 int breakpoint,
 int group,
 String options)
              throws IOException

Throws:

IOException

openFile

public static int openFile(String fileName)
                    throws IOException

Throws:

IOException

close

public static void close(int fd)

get

static long get(int fd)
         throws IOException

Throws:

IOException

getValue

static void getValue(int fd,
 long[] value,
 int off,
 int len)
              throws IOException

Throws:

IOException

ioctl

static void ioctl(int fd,
 int cmd,
 int arg)
           throws IOException

Throws:

IOException