public void MeasureIncreasingDoublingLoop()
{
UT_INIT();
Log.SetVerbosity( new ConsoleLogger(), Verbosity.Verbose, "/" );
Log.MapThreadName( "UnitTest" );
Log.SetDomain( "TickWatch", Scope.Method );
Log.Info( "This test shows quite nicely, how the just in time compiler steps in when we are looping heavily!" );
String testString= "-------------------------------------------------------------------------------------------#";
AString testAString= new AString( testString );
TickWatch ttString= new TickWatch();
TickWatch ttAString= new TickWatch();
for (int run= 4; run < 20; run++ )
{
int qtyLoops= (run == 0) ? 0 : (1 << (run -1));
// use String.IndexOf()
ttString.Reset();
int nonOptimizableUsedResultValue= 0;
for (int i= 0; i < qtyLoops; i++ )
nonOptimizableUsedResultValue+= testString.IndexOf( '#' );
Ticks sSample= ttString.Sample();
// use AString.IndexOf()
ttAString.Reset();
for (int i= 0; i < qtyLoops; i++ )
nonOptimizableUsedResultValue+= testAString.IndexOf( '#' );
Ticks aSample= ttAString.Sample();
if ( nonOptimizableUsedResultValue > -1 ) // this is always true, just for the sake that the compiler does not optimize the whole code!
Log.Info( Log.Buf()._( "Search loops " ) .Field()._( qtyLoops.ToString() ) .Field( 6 )
._( ": time needed: " ) .Field()._( (int) sSample.InNanos() ).Field( 8 )
._( " / " ) .Field()._( (int) aSample.InNanos() ).Field( 8 )
._( " Ratio String/AString: " ) ._( ((double) sSample.Raw()) / ((double) aSample.Raw()) )
);
}
}
/** ****************************************************************************************
* Creates a TickWatch as a copy of another TickWatch.
*
* @param copy The instance to copy value from.
******************************************************************************************/
public TickWatch(TickWatch copy)
{
ticks.Set(copy.ticks);
sum.Set(copy.sum);
cntSamples = copy.cntSamples;
}
public void Ages()
{
UT_INIT();
Log.SetVerbosity( new ConsoleLogger(), Verbosity.Verbose, "/" );
Log.MapThreadName( "UnitTest" );
Log.SetDomain( "TickWatch", Scope.Method );
TickWatch tt=new TickWatch();
// minimum time measuring
{
tt.Start();
tt.Sample();
tt.Reset(); // we need to do this once before, otherwise C# might be
// very slow. Obviously the optimizer...
tt.Start();
tt.Sample();
long ttAverageInNanos=tt.GetAverage().InNanos();
long ttAverageInMicros=tt.GetAverage().InMicros();
long ttAverageInMillis=tt.GetAverage().InMillis();
Log.Info( "TickWatch minimum measurement nanos: " + ttAverageInNanos );
Log.Info( "TickWatch minimum measurement micros: " + ttAverageInMicros );
Log.Info( "TickWatch minimum measurement millis: " + ttAverageInMillis );
UT_TRUE( ttAverageInNanos < 5000 );
UT_TRUE( ttAverageInMicros <= 5 );
UT_TRUE( ttAverageInMillis == 0 );
}
// minimum sleep time measuring
{
tt.Reset();
for (int i= 0 ; i< 100 ; i++)
{
ALIB.SleepNanos( 1 );
tt.Sample();
}
Ticks avg= tt.GetAverage();
Log.Info( "100 probes of 1 ns of sleep leads to average sleep time of " + avg.InNanos() + " ns");
}
// sleep two times 20 ms and probe it to an average
{
tt.Reset();
tt.Start();
ALIB.SleepMillis( 20 );
tt.Sample();
ALIB.SleepMillis( 80 );
tt.Start();
ALIB.SleepMillis( 20 );
tt.Sample();
long cnt=tt.GetSampleCnt();
long avg=tt.GetAverage().InMillis();
double hertz=tt.GetAverage().InHertz( 1 );
Log.Info( "TickWatch sum is " + tt.GetCumulated().InMillis() + " after " + cnt + " times 20 ms sleep" );
Log.Info( " average is: " + avg + " ms" );
Log.Info( " in Hertz: " + hertz );
UT_TRUE( hertz < 53 );
UT_TRUE( hertz > 30 ); // should work even on heavily loaded machines
UT_EQ( 2, cnt );
UT_TRUE( avg >= 18 );
UT_TRUE( avg < 45 ); // should work even on heavily loaded machines
}
// Ticks Since
{
Ticks tt1= new Ticks(); tt1.FromSeconds( 1000 );
Ticks tt2= new Ticks(); tt2.FromSeconds( 1001 );
UT_TRUE ( tt2.Since( tt1 ).InMillis() == 1000L );
UT_TRUE ( tt2.Since( tt1 ).InMicros() == 1000L * 1000L );
UT_TRUE ( tt2.Since( tt1 ).InNanos () == 1000L * 1000L * 1000L );
}
}
/** ****************************************************************************************
* Creates a TickWatch as a copy of another TickWatch.
*
* @param copy The instance to copy value from.
******************************************************************************************/
public TickWatch ( TickWatch copy )
{
ticks .Set( copy.ticks );
sum .Set( copy.sum );
cntSamples= copy.cntSamples;
}