private async Task RampUpAsync(TestRunInfo testRunInfo)
{
// Handle ramp up if defined
if (testRunInfo.RampUpTimeSeconds > 4 && !_cancellationTokenSource.IsCancellationRequested)
{
Tracer.TraceInfo($"Ramping up starts.");
DateTime startTime = DateTime.Now;
DateTime endTime = startTime + TimeSpan.FromSeconds(testRunInfo.RampUpTimeSeconds);
int numberIntervals = Math.Min(testRunInfo.RampUpTimeSeconds / 5, 6);
TimeSpan intervalLength = (endTime - startTime) / numberIntervals;
double intervalRpsDelta = ((double)testRunInfo.TargetRPS) / ((double)numberIntervals);
for (int i = 0; i < numberIntervals && !_cancellationTokenSource.IsCancellationRequested; i++)
{
var apiInfo = _mixInfo.ApiMix[i % _mixInfo.ApiMix.Count];
long intervalRps = (long)Math.Round((i + 1) * intervalRpsDelta);
Tracer.TraceInfo($"Ramping up. RPS = {intervalRps}");
AsyncFor myRampUpFor = new AsyncFor(intervalRps, GetResourceDescription(apiInfo, _mixInfo), GetTestDescription(apiInfo), testRunInfo.MeasureServerSideTime);
myRampUpFor.PerSecondMetricsAvailable += new ConsoleMetricsHandler().MetricsAvailableHandler;
_asyncForInstances.Add(myRampUpFor);
try
{
await myRampUpFor.ForAsync(
intervalLength,
testRunInfo.SimultaneousConnections,
new MaaServiceApiCaller(apiInfo, _mixInfo.ProviderMix, testRunInfo.EnclaveInfoFile, testRunInfo.ForceReconnects).CallApi,
_cancellationTokenSource.Token);
}
catch (TaskCanceledException)
{
// Ignore task cancelled if we requested cancellation via ctrl-c
if (_cancellationTokenSource.IsCancellationRequested)
{
Tracer.TraceInfo(($"Organized shutdown in progress. All asyncfor instances have gracefully shutdown."));
}
else
{
throw;
}
}
}
Tracer.TraceInfo($"Ramping up complete.");
}
}