public override MetricCollector Create(RunMode runMode, WarmupData warmup, IBenchmarkSetting setting)
{
Contract.Assert(setting != null);
Contract.Assert(setting is PerformanceCounterBenchmarkSetting);
var counterBenchmarkSetting = setting as PerformanceCounterBenchmarkSetting;
var name = counterBenchmarkSetting.PerformanceCounterMetric;
// re-use the PerformanceCounter objects in our pool if possible
if (_cache.Exists(name))
{
return(new PerformanceCounterValueCollector(name, name.UnitName ?? MetricNames.DefaultUnitName, _cache.Get(name), true));
}
// otherwise, warm up new ones
var maxRetries = 3;
var currentRetries = 0;
if (!PerformanceCounterCategory.CounterExists(name.CounterName, name.CategoryName))
{
throw new NBenchException($"Performance counter {name.ToHumanFriendlyString()} is not registered on this machine. Please create it first.");
}
// check to see that the instance we're interested in is registered
if (!string.IsNullOrEmpty(name.InstanceName))
{
var categories = PerformanceCounterCategory.GetCategories().Where(x => x.CategoryType == PerformanceCounterCategoryType.MultiInstance).ToList();
#if DEBUG
Console.WriteLine("---- DEBUG -----");
Console.WriteLine("{0} multi-instance categories detected", categories.Count);
#endif
var category = categories.Single(x => x.CategoryName == name.CategoryName);
var instances = category.GetInstanceNames();
if (!instances.Contains(name.InstanceName))
{
#if DEBUG
Console.WriteLine("---- DEBUG -----");
Console.WriteLine("Multi-instance? {0}", category.CategoryType);
foreach (var instance in instances)
{
Console.WriteLine(instance);
}
#endif
throw new NBenchException($"Performance counter {name.CategoryName}:{name.CounterName} exists, but we could not find an instance {name.InstanceName}.");
}
}
var proxy = new PerformanceCounterProxy(() =>
{
var counter = new PerformanceCounter(name.CategoryName, name.CounterName,
name.InstanceName ?? string.Empty, true);
return(counter);
});
while (!CanFindPerformanceCounter(name) && currentRetries <= maxRetries)
{
Thread.Sleep(TimeSpan.FromMilliseconds(1000 + 100 * (currentRetries ^ 2))); // little bit of exponential backoff
if (proxy.CanWarmup)
{
break;
}
currentRetries++;
}
if (!proxy.CanWarmup)
{
throw new NBenchException($"Performance counter {name.ToHumanFriendlyString()} is not registered on this machine. Please create it first.");
}
// cache this performance counter and pool it for re-use
_cache.Put(name, proxy);
return(new PerformanceCounterValueCollector(name, name.UnitName ?? MetricNames.DefaultUnitName, _cache.Get(name), true));
}
public override MetricCollector Create(RunMode runMode, WarmupData warmup, IBenchmarkSetting setting)
{
Contract.Assert(setting != null);
Contract.Assert(setting is PerformanceCounterBenchmarkSetting);
var counterBenchmarkSetting = setting as PerformanceCounterBenchmarkSetting;
var name = counterBenchmarkSetting.PerformanceCounterMetric;
// re-use the PerformanceCounter objects in our pool if possible
if (_cache.Exists(name))
return new PerformanceCounterValueCollector(name, name.UnitName ?? MetricNames.DefaultUnitName, _cache.Get(name), true);
// otherwise, warm up new ones
var maxRetries = 3;
var currentRetries = 0;
if (!PerformanceCounterCategory.CounterExists(name.CounterName, name.CategoryName))
throw new NBenchException($"Performance counter {name.ToHumanFriendlyString()} is not registered on this machine. Please create it first.");
// check to see that the instance we're interested in is registered
if (!string.IsNullOrEmpty(name.InstanceName))
{
var categories = PerformanceCounterCategory.GetCategories().Where(x => x.CategoryType == PerformanceCounterCategoryType.MultiInstance).ToList();
#if DEBUG
Console.WriteLine("---- DEBUG -----");
Console.WriteLine("{0} multi-instance categories detected", categories.Count);
#endif
var category = categories.Single(x => x.CategoryName == name.CategoryName);
var instances = category.GetInstanceNames();
if (!instances.Contains(name.InstanceName))
{
#if DEBUG
Console.WriteLine("---- DEBUG -----");
Console.WriteLine("Multi-instance? {0}", category.CategoryType);
foreach (var instance in instances)
Console.WriteLine(instance);
#endif
throw new NBenchException($"Performance counter {name.CategoryName}:{name.CounterName} exists, but we could not find an instance {name.InstanceName}.");
}
}
var proxy = new PerformanceCounterProxy(() =>
{
var counter = new PerformanceCounter(name.CategoryName, name.CounterName,
name.InstanceName ?? string.Empty, true);
return counter;
});
while (!CanFindPerformanceCounter(name) && currentRetries <= maxRetries)
{
Thread.Sleep(TimeSpan.FromMilliseconds(1000 + 100 * (currentRetries ^ 2))); // little bit of exponential backoff
if (proxy.CanWarmup)
break;
currentRetries++;
}
if (!proxy.CanWarmup)
throw new NBenchException($"Performance counter {name.ToHumanFriendlyString()} is not registered on this machine. Please create it first.");
// cache this performance counter and pool it for re-use
_cache.Put(name, proxy);
return new PerformanceCounterValueCollector(name, name.UnitName ?? MetricNames.DefaultUnitName, _cache.Get(name), true);
}
