nachos.machine
Class Stats

java.lang.Object
  nachos.machine.Stats

public final class Stats
extends Object

An object that maintains Nachos runtime statistics.

Field Summary

static int	ConsoleTime The amount of simulated time required for the console to handle a character.
static int	ElevatorTicks The amount of simulated time required for an elevator to move a floor.
static int	KernelTick The amount to advance simulated time after each interrupt enable.
long	kernelTicks The total amount of simulated time that Nachos has spent in kernel mode.
static int	NetworkTime The amount of simulated time required for the network to handle a packet.
int	numConsoleReads The total number of characters Nachos has read from the console.
int	numConsoleWrites The total number of characters Nachos has written to the console.
int	numDiskReads The total number of sectors Nachos has read from the simulated disk.
int	numDiskWrites The total number of sectors Nachos has written to the simulated disk.
int	numPacketsReceived The total number of packets Nachos has received from the network.
int	numPacketsSent The total number of packets Nachos has sent to the network.
int	numPageFaults The total number of page faults that have occurred.
int	numTLBMisses The total number of TLB misses that have occurred.
static int	RotationTime The amount of simulated time required to rotate the disk 360 degrees.
static int	SeekTime The amount of simulated time required for the disk to seek.
static int	TimerTicks The mean amount of simulated time between timer interrupts.
long	totalTicks The total amount of simulated time that has passed since Nachos started.
static int	UserTick The amount to advance simulated time after each user instructions is executed.
long	userTicks The total amount of simulated time that Nachos has spent in user mode.

Constructor Summary

Stats()
Allocate a new statistics object.

Method Summary

void	print() Print out the statistics in this object.

Methods inherited from class java.lang.Object

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

Field Detail

totalTicks

public long totalTicks

The total amount of simulated time that has passed since Nachos started.

kernelTicks

public long kernelTicks

The total amount of simulated time that Nachos has spent in kernel mode.

userTicks

public long userTicks

The total amount of simulated time that Nachos has spent in user mode.

numDiskReads

public int numDiskReads

The total number of sectors Nachos has read from the simulated disk.

numDiskWrites

public int numDiskWrites

The total number of sectors Nachos has written to the simulated disk.

numConsoleReads

public int numConsoleReads

The total number of characters Nachos has read from the console.

numConsoleWrites

public int numConsoleWrites

The total number of characters Nachos has written to the console.

numPageFaults

public int numPageFaults

The total number of page faults that have occurred.

numTLBMisses

public int numTLBMisses

The total number of TLB misses that have occurred.

numPacketsSent

public int numPacketsSent

The total number of packets Nachos has sent to the network.

numPacketsReceived

public int numPacketsReceived

The total number of packets Nachos has received from the network.

UserTick

public static final int UserTick

The amount to advance simulated time after each user instructions is executed.

See Also:

Constant Field Values

KernelTick

public static final int KernelTick

The amount to advance simulated time after each interrupt enable.

See Also:

Constant Field Values

RotationTime

public static final int RotationTime

The amount of simulated time required to rotate the disk 360 degrees.

See Also:

Constant Field Values

SeekTime

public static final int SeekTime

The amount of simulated time required for the disk to seek.

See Also:

Constant Field Values

ConsoleTime

public static final int ConsoleTime

The amount of simulated time required for the console to handle a character.

See Also:

Constant Field Values

NetworkTime

public static final int NetworkTime

The amount of simulated time required for the network to handle a packet.

See Also:

Constant Field Values

TimerTicks

public static final int TimerTicks

The mean amount of simulated time between timer interrupts.

See Also:

Constant Field Values

ElevatorTicks

public static final int ElevatorTicks

The amount of simulated time required for an elevator to move a floor.

See Also:

Constant Field Values

Constructor Detail

Stats

public Stats()

Allocate a new statistics object.

Method Detail

print

public void print()

Print out the statistics in this object.