gate.util.profile

Class Profiler

java.lang.Object

gate.util.profile.Profiler

public class Profiler
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.apache.log4j.Logger	log

Constructor Summary

Constructors

Constructor and Description
Profiler()

Method Summary

Modifier and Type	Method and Description
String	checkPoint(String execPointDescr) To be called at all execution points of interest.
String	checkPoint(String execPointDescr, String[] categories, boolean showDescr, boolean showStats, boolean memoryCheck) In addition to the variant of the method with two parameters allows: a set of categories (identified by strings) to which the preceeding fragment of code belongs; flag determining whether the description of the execution point to be displayed; flag determining whether the statistics to be shown
void	enable(boolean isEnabled) Switches the profiler ON and OFF.
void	enableGCCalling(boolean collect) Tell's the profiler whether to call the garbage collector when detecting memory usage or not.
long	getCategoryTimeLast(String category) Returns 0 if the category was not found
long	getCategoryTimeSum(String category) Returns 0 if the category was not found
long	getLastDuration()
long	getNetRunTime() Returns the time spend in the last run without the time spend by the profiler.
long	getProfilerTime() Returns the time spend by the profiler during the last run.
long	getRunDuration() Returns the time spend in the current run until the last check-point inclusive the time spend by the profiler.
String	initRun(String runDescription) Inialises the profiler for a new run
boolean	isEnabled() Answers is the profiler switched ON or OFF.
boolean	isGCCallingEnabled()
void	printCategAvg(String categ, long items, double volume, String whateverMeasure) An auxiliary routine printing time, avg.
String	printSpeed(long timeMillis, double whatever, String whateverMeasure) An auxiliary routine printing in a string speed
String	printTime(long timeMillis) An auxiliary routine printing time in "nnn.nns" format
void	printToSystemOut(boolean doPrint) Sets the profiler to print (or not) to the standard output.
void	showCategoryTime(String categ) Prints the time for certain category of activities
void	showCategoryTimes() Prints the time for all the categories of activities

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static final org.apache.log4j.Logger log

Constructor Detail

Profiler

public Profiler()

Method Detail

enable

public void enable(boolean isEnabled)

Switches the profiler ON and OFF. When OFF all the methods do nothing

isEnabled

public boolean isEnabled()

Answers is the profiler switched ON or OFF. When OFF all the methods do nothing

enableGCCalling

public void enableGCCalling(boolean collect)

Tell's the profiler whether to call the garbage collector when detecting memory usage or not. If switched ON the GC is called following a specific strategy as many time as needed so to collect all the memory that can be collected. This makes the profiling slower and also does not correctly account for the really memory usage of the applicaton when run without the profiler. On the other hand, with garbage collection, it is easier to detecet the amount of memory really necessary for the application.

isGCCallingEnabled

public boolean isGCCallingEnabled()

See Also:

enableGCCalling(boolean)

getProfilerTime

public long getProfilerTime()

Returns the time spend by the profiler during the last run. It is the case that net_run_time = run_duration - profiler_time

getNetRunTime

public long getNetRunTime()

Returns the time spend in the last run without the time spend by the profiler. It is the case that net_run_time = run_duration - profiler_time

getRunDuration

public long getRunDuration()

Returns the time spend in the current run until the last check-point inclusive the time spend by the profiler. It is the case that net_run_time = run_duration - profiler_time

getLastDuration

public long getLastDuration()

initRun

public String initRun(String runDescription)

Inialises the profiler for a new run

checkPoint

public String checkPoint(String execPointDescr)

To be called at all execution points of interest. Detects the time and memory usage in absolute terms as well as compared to the previous execution point

checkPoint

public String checkPoint(String execPointDescr,
                         String[] categories,
                         boolean showDescr,
                         boolean showStats,
                         boolean memoryCheck)

In addition to the variant of the method with two parameters allows: a set of categories (identified by strings) to which the preceeding fragment of code belongs; flag determining whether the description of the execution point to be displayed; flag determining whether the statistics to be shown

getCategoryTimeSum

public long getCategoryTimeSum(String category)

Returns 0 if the category was not found

getCategoryTimeLast

public long getCategoryTimeLast(String category)

Returns 0 if the category was not found

showCategoryTimes

public void showCategoryTimes()

Prints the time for all the categories of activities

showCategoryTime

public void showCategoryTime(String categ)

Prints the time for certain category of activities

printTime

public String printTime(long timeMillis)

An auxiliary routine printing time in "nnn.nns" format

printSpeed

public String printSpeed(long timeMillis,
                         double whatever,
                         String whateverMeasure)

An auxiliary routine printing in a string speed

printCategAvg

public void printCategAvg(String categ,
                          long items,
                          double volume,
                          String whateverMeasure)

An auxiliary routine printing time, avg. time, and avg. speed for a category

printToSystemOut

public void printToSystemOut(boolean doPrint)

Sets the profiler to print (or not) to the standard output. The default behaviour is - print to std out.

Parameters:

doPrint - whether or not to print to std out.