/// <summary>
/// A case where we don't have specific iteration time.
/// </summary>
private long RunAuto()
{
long invokeCount = TargetAccuracy.MinInvokeCount.Resolve(Resolver);
double maxError = TargetAccuracy.MaxStdErrRelative.Resolve(Resolver); // TODO: introduce a StdErr factor
double minIterationTome = TimeUnit.Convert(Engine.MinIterationTimeMs, TimeUnit.Millisecond, TimeUnit.Nanosecond);
double resolution = TargetClock.GetResolution().Nanoseconds;
int iterationCounter = 0;
while (true)
{
iterationCounter++;
var measurement = RunIteration(IterationMode.Pilot, iterationCounter, invokeCount);
double iterationTime = measurement.Nanoseconds;
double operationError = 2.0 * resolution / invokeCount; // An operation error which has arisen due to the Chronometer precision
double operationMaxError = iterationTime / invokeCount * maxError; // Max acceptable operation error
bool isFinished = operationError < operationMaxError && iterationTime >= minIterationTome;
if (isFinished)
{
break;
}
if (invokeCount >= MaxInvokeCount)
{
break;
}
invokeCount *= 2;
}
WriteLine();
return(invokeCount);
}
/// <summary>
/// A case where we don't have specific iteration time.
/// </summary>
private long RunAuto()
{
int unrollFactor = TargetJob.Run.UnrollFactor.Resolve(Resolver);
Func <long, long> autocorrect = count => (count + unrollFactor - 1) / unrollFactor * unrollFactor;
long invokeCount = autocorrect(TargetAccuracy.MinInvokeCount.Resolve(Resolver));
double maxError = TargetAccuracy.MaxStdErrRelative.Resolve(Resolver); // TODO: introduce a StdErr factor
double minIterationTime = Engine.MinIterationTime.Nanoseconds;
double resolution = TargetClock.GetResolution().Nanoseconds;
int iterationCounter = 0;
while (true)
{
iterationCounter++;
var measurement = RunIteration(IterationMode.Pilot, iterationCounter, invokeCount, unrollFactor);
double iterationTime = measurement.Nanoseconds;
double operationError = 2.0 * resolution / invokeCount; // An operation error which has arisen due to the Chronometer precision
double operationMaxError = iterationTime / invokeCount * maxError; // Max acceptable operation error
bool isFinished = operationError < operationMaxError && iterationTime >= minIterationTime;
if (isFinished)
{
break;
}
if (invokeCount >= MaxInvokeCount)
{
break;
}
invokeCount *= 2;
}
WriteLine();
return(invokeCount);
}
