org.jikesrvm.compilers.baseline
Class EdgeCounts

java.lang.Object
  org.jikesrvm.compilers.baseline.EdgeCounts

All Implemented Interfaces:

Callbacks.ExitMonitor

public final class EdgeCounts
extends Object
implements Callbacks.ExitMonitor

A repository of edge counters for bytecode-level edge conditional branches.

TAKEN

public static final int TAKEN

Adjustment to offset in data from the bytecode index for taken branch counts

See Also:

Constant Field Values

NOT_TAKEN

public static final int NOT_TAKEN

Adjustment to offset in data from the bytecode index for not taken branch counts

See Also:

Constant Field Values

registered

private static boolean registered

For a non-adaptive system, have we registered the exit call back yet?

data

private static int[][] data

Array of edge count data. The first index is the ID of the method, the second index is the bytecode index within the method plus either TAKEN or NOT_TAKEN. The value is the count of the number of times a particular branch event occurs.

EdgeCounts

public EdgeCounts()

notifyExit

public void notifyExit(int value)

Description copied from interface: Callbacks.ExitMonitor

Notify the monitor that the VM is about to exit.

Specified by:

notifyExit in interface Callbacks.ExitMonitor

Parameters:

value - the exit value

boot

public static void boot(String inputFileName)

allocateCounters

public static void allocateCounters(NormalMethod m,
                                    int numEntries)

allocateCounters

private static void allocateCounters(int id,
                                     int numEntries)

getBranchProfiles

public static BranchProfiles getBranchProfiles(NormalMethod m)

dumpCounts

public static void dumpCounts()

Dump all the profile data to the file BaselineCompiler.options.PROFILE_EDGE_COUNTER_FILE

dumpCounts

public static void dumpCounts(String fn)

Dump all profile data to the given file

Parameters:

fn - output file name

readCounts

public static void readCounts(String fn)