/// <summary>
/// Assigns experiments to available herd agents.
/// </summary>
/// <param name="freeHerdAgents"></param>
public static void AssignExperiments(ref List <ExperimentalUnit> pendingExperiments
, ref List <HerdAgentInfo> freeHerdAgents, ref List <Job> assignedJobs, JobDispatcherOptions options = null)
{
//Clear the list: these are jobs which have to be sent
assignedJobs.Clear();
//Create a list of agents that are given work. We need to remove them from the "free" list out of the loop
List <HerdAgentInfo> usedHerdAgents = new List <HerdAgentInfo>();
//We iterate on the free agents to decide what jobs to give each of them until:
// -either there are no more pending experiments
// -all agents have been given work
foreach (HerdAgentInfo agent in freeHerdAgents)
{
List <ExperimentalUnit> experiments = new List <ExperimentalUnit>();
int numFreeCores = agent.NumProcessors;
bool bAgentUsed = false;
ExperimentalUnit experiment;
bool bFailedToFindMatch = false;
//leave one free core??
if (options != null && options.LeaveOneFreeCore && numFreeCores > 1)
{
numFreeCores--;
}
while (numFreeCores > 0 && !bFailedToFindMatch)
{
experiment = FirstFittingExperiment(pendingExperiments, numFreeCores, bAgentUsed, agent);
if (experiment != null)
{
//remove the experiment from the list and add it to running experiments
experiments.Add(experiment);
pendingExperiments.Remove(experiment);
//update the number of free cpu cores
if (experiment.RunTimeReqs.NumCPUCores > 0)
{
numFreeCores -= experiment.RunTimeReqs.NumCPUCores;
}
else
{
numFreeCores = 0;
}
bAgentUsed = true;
}
else
{
bFailedToFindMatch = true;
}
}
if (bAgentUsed)
{
Job newJob = new Job(experiments, agent);
assignedJobs.Add(newJob);
usedHerdAgents.Add(agent);
++jobId;
}
if (pendingExperiments.Count == 0)
{
break;
}
}
//now we can remove used agents from the list
foreach (HerdAgentInfo agent in usedHerdAgents)
{
freeHerdAgents.Remove(agent);
}
}
public static async Task <int> RunExperimentsAsync(List <ExperimentalUnit> experiments, List <HerdAgentInfo> freeHerdAgents
, Monitoring.MsgDispatcher dispatcher
, CancellationTokenSource cancellationTokenSource
, JobDispatcherOptions jobDispatcherOptions = null)
{
List <Job> assignedJobs = new List <Job>();
List <Task <Job> > monitoredJobTasks = new List <Task <Job> >();
int numExperimentalUnitsRun = 0;
// Calculate run-time requirements
foreach (ExperimentalUnit experimentalUnit in experiments)
{
experimentalUnit.RequestRuntimeRequirements();
}
// Assign experiments to free agents
AssignExperiments(ref experiments, ref freeHerdAgents, ref assignedJobs, jobDispatcherOptions);
if (assignedJobs.Count == 0)
{
return(0);
}
try
{
while ((assignedJobs.Count > 0 || monitoredJobTasks.Count > 0 ||
experiments.Count > 0) && !cancellationTokenSource.IsCancellationRequested)
{
//Create view-models for the jobs and execute them remotely
foreach (Job job in assignedJobs)
{
dispatcher.JobAssigned?.Invoke(job);
monitoredJobTasks.Add(job.SendJobAndMonitor(dispatcher));
}
// All pending experiments sent? Then we await completion to retry in case something fails
if (experiments.Count == 0)
{
Task.WhenAll(monitoredJobTasks).Wait();
foreach (Task <Job> task in monitoredJobTasks)
{
dispatcher.JobFinished?.Invoke(task.Result);
}
dispatcher.Log?.Invoke("All the experiments have finished");
break;
}
// Wait for the first agent to finish and give it something to do
Task <Job> finishedTask = await Task.WhenAny(monitoredJobTasks);
Job finishedJob = await finishedTask;
dispatcher.Log?.Invoke("Job finished: " + finishedJob.ToString());
//A job finished
monitoredJobTasks.Remove(finishedTask);
if (!cancellationTokenSource.IsCancellationRequested)
{
numExperimentalUnitsRun += finishedJob.ExperimentalUnits.Count;
dispatcher.JobFinished?.Invoke(finishedJob);
}
if (finishedJob.FailedExperimentalUnits.Count > 0)
{
experiments.AddRange(finishedJob.FailedExperimentalUnits);
dispatcher.Log?.Invoke(finishedJob.FailedExperimentalUnits.Count + " failed experiments enqueued again for further trials");
}
// Add the herd agent to the free agent list
if (!freeHerdAgents.Contains(finishedJob.HerdAgent))
{
freeHerdAgents.Add(finishedJob.HerdAgent);
}
// Assign experiments to free agents
if (!cancellationTokenSource.IsCancellationRequested)
{
AssignExperiments(ref experiments, ref freeHerdAgents, ref assignedJobs, jobDispatcherOptions);
}
}
}
catch (Exception ex)
{
dispatcher.Log?.Invoke("Exception in runExperimentQueueRemotely()");
dispatcher.Log?.Invoke(ex.StackTrace);
}
finally
{
if (cancellationTokenSource.IsCancellationRequested)
{
//the user cancelled, need to add unfinished experimental units to the pending list
foreach (Job job in assignedJobs)
{
experiments.AddRange(job.ExperimentalUnits);
}
}
else
{
foreach (Task <Job> job in monitoredJobTasks)
{
numExperimentalUnitsRun += job.Result.ExperimentalUnits.Count - job.Result.FailedExperimentalUnits.Count;
}
}
}
return(numExperimentalUnitsRun);
}