/// <summary>
/// Calculate the number of threads used when running a sieve.
/// </summary>
/// <param name="sieve">The sieve that was run.</param>
/// <param name="settings">The run settings.</param>
/// <returns>Returns a tuple of external threads used (each one running one sieve) and internal threads used (how many threads each sieve uses).</returns>
private static (int thraeds, int pThreads) GetThreadCount(ISieveRunner sieve, SettingsV2 settings)
{
int threads = 1;
if (settings.MultiThreaded)
{
threads = settings.ThreadCount == 0 ? Environment.ProcessorCount : settings.ThreadCount;
}
int pThreads = 1;
if (sieve.IsParallel)
{
pThreads = settings.PThreadCount == 0 ? Environment.ProcessorCount : settings.PThreadCount;
}
return(threads, pThreads);
}
/// <summary>
/// Print the final output to the console.
/// </summary>
/// <param name="sieve">The sieve that was run.</param>
/// <param name="passes">How many times it was run.</param>
/// <param name="watch">The stopwatch used to time it.</param>
/// <param name="settings">The settings that were in effect.</param>
private static void PrintResults(ISieveRunner sieve, int passes, Stopwatch watch, SettingsV2 settings)
{
if (settings.Verbose)
{
string listing = sieve.GetFoundPrimes()
.Select(a => a.ToString())
.Aggregate((a, b) => $"{a}, {b}");
Console.WriteLine(listing);
Console.WriteLine();
}
(int threads, int pThreads) = GetThreadCount(sieve, settings);
Console.WriteLine(GetLongOutputDescription(sieve, passes, watch, threads, pThreads));
Console.WriteLine(GetCompactOutputDescription(sieve, passes, watch, threads, pThreads));
}
/// <summary>
/// Get the compact output of the sieve run.
/// </summary>
private static string GetCompactOutputDescription(ISieveRunner sieve, int passes, Stopwatch watch, int threads, int pThreads)
{
// official syntax:
// <label>;<pass_count>;<runtime>;<num_threads>;<tags (if any)>
StringBuilder sb = new();
// Fields:
sb.Append($"kinematics_{sieve.Name};");
sb.Append($"{passes};");
sb.AppendFormat("{0:G6};", watch.Elapsed.TotalSeconds);
sb.Append($"{threads * pThreads};");
// Tags:
sb.Append($"algorithm={sieve.AlgorithmType},");
sb.Append($"faithful={(sieve.IsFaithful ? "yes" : "no")},");
sb.Append($"bits={sieve.BitsPerPrime}");
sb.AppendLine();
return(sb.ToString());
}
/// <summary>
/// Get the long form output of the sieve run.
/// </summary>
private static string GetLongOutputDescription(ISieveRunner sieve, int passes, Stopwatch watch, int threads, int pThreads)
{
List <string> results = new();
results.Add($"Passes: {passes}");
results.Add($"Time: {watch.Elapsed.TotalSeconds:G6} s");
results.Add($"{((double)watch.ElapsedMilliseconds / passes):F6} ms/loop");
results.Add($"Sieve Size: {sieve.SieveSize}");
results.Add($"Thread Count: {threads}");
if (sieve.IsParallel)
{
results.Add($"Parallel Thread Count: {pThreads}");
}
results.Add($"Primes: {sieve.CountPrimes()}");
results.Add($"Valid: {PrimeData.IsCountCorrect(sieve.SieveSize, sieve.CountPrimes())?.ToString() ?? "Unable to determine"}");
if (sieve.ClearCount > 0)
{
results.Add($"Clear Count: {sieve.ClearCount}");
}
return(results.Aggregate((a, b) => $"{a}, {b}"));
}