/// <summary>
/// Binds processes to performance counters instance names and adds performance counters to the collection.
/// </summary>
/// <remarks>This operation is expensive, but must be done periodically to account for IIS changing instance names
/// of the counters it reports Web Sites on as worker processes start and terminate.</remarks>
private void EnsurePerformanceCountersRegistered()
{
if (DateTime.Now - this.lastRefreshTimestamp < this.registrationPeriod)
{
// re-registration period hasn't elapsed yet, do nothing
return;
}
PerformanceCounterUtility.InvalidatePlaceholderCache();
if (this.lastRefreshTimestamp == DateTime.MinValue)
{
// this is the initial registration, register everything
this.ProcessCustomCounters();
string error;
var errors = new List <string>();
foreach (PerformanceCounterCollectionRequest req in this.DefaultCounters.Union(this.Counters))
{
this.collector.RegisterCounter(
req.PerformanceCounter,
req.ReportAs,
true,
out error,
false);
if (!string.IsNullOrWhiteSpace(error))
{
errors.Add(
string.Format(
CultureInfo.InvariantCulture,
"Counter {0}: {1}",
req.PerformanceCounter,
error));
}
}
if (errors.Any())
{
// send out the unified error message
PerformanceCollectorEventSource.Log.CounterCheckConfigurationEvent(
errors.Count.ToString(CultureInfo.InvariantCulture),
string.Join(Environment.NewLine, errors));
}
}
else
{
// this is a periodic refresh
this.collector.RefreshCounters();
}
// as per MSDN, we need to wait at least 1s before proceeding with counter collection
Thread.Sleep(TimeSpan.FromSeconds(1));
this.lastRefreshTimestamp = DateTime.Now;
}
public void PerformanceCounterUtilityPlaceholderExpansionTest()
{
PerformanceCounterUtility.InvalidatePlaceholderCache();
var win32Instances = PerformanceCounterUtility.GetWin32ProcessInstances();
var clrInstances = PerformanceCounterUtility.GetClrProcessInstances();
bool usesInstanceNamePlaceholder;
var pc = PerformanceCounterUtility.ParsePerformanceCounter(@"\Processor(??APP_WIN32_PROC??)\% Processor Time", win32Instances, clrInstances, out usesInstanceNamePlaceholder);
Assert.IsFalse(pc.InstanceName.Contains("?"));
pc = PerformanceCounterUtility.ParsePerformanceCounter(@"\Processor(??APP_CLR_PROC??)\% Processor Time", win32Instances, clrInstances, out usesInstanceNamePlaceholder);
Assert.IsFalse(pc.InstanceName.Contains("?"));
pc = PerformanceCounterUtility.ParsePerformanceCounter(@"\Processor(??APP_W3SVC_PROC??)\% Processor Time", win32Instances, clrInstances, out usesInstanceNamePlaceholder);
Assert.IsFalse(pc.InstanceName.Contains("?"));
pc = PerformanceCounterUtility.ParsePerformanceCounter(@"\ASP.NET Applications(??APP_W3SVC_PROC??)\Request Execution Time", win32Instances, clrInstances, out usesInstanceNamePlaceholder);
Assert.IsFalse(pc.InstanceName.Contains("?"));
pc = PerformanceCounterUtility.ParsePerformanceCounter(@"\Processor(??NON_EXISTENT??)\% Processor Time", win32Instances, clrInstances, out usesInstanceNamePlaceholder);
Assert.AreEqual("??NON_EXISTENT??", pc.InstanceName);
// validate placeholder cache state
var cache =
new PrivateType(typeof(PerformanceCounterUtility)).GetStaticField(
"PlaceholderCache",
BindingFlags.NonPublic) as ConcurrentDictionary <string, string>;
Assert.AreEqual(3, cache.Count);
Assert.IsTrue(cache.ContainsKey("APP_WIN32_PROC"));
Assert.IsTrue(cache.ContainsKey("APP_CLR_PROC"));
Assert.IsTrue(cache.ContainsKey("APP_W3SVC_PROC"));
PerformanceCounterUtility.InvalidatePlaceholderCache();
Assert.IsFalse(cache.Any());
}
/// <summary>
/// Binds processes to performance counters instance names and adds performance counters to the collection.
/// </summary>
/// <remarks>This operation is expensive, but must be done periodically to account for IIS changing instance names
/// of the counters it reports Web Sites on as worker processes start and terminate.</remarks>
private void EnsurePerformanceCountersRegistered()
{
if (DateTime.Now - this.lastRefreshTimestamp < this.registrationPeriod)
{
// re-registration period hasn't elapsed yet, do nothing
return;
}
// get all instances that currently exist in the system
var win32Instances = PerformanceCounterUtility.GetWin32ProcessInstances();
var clrInstances = PerformanceCounterUtility.GetClrProcessInstances();
PerformanceCounterUtility.InvalidatePlaceholderCache();
if (this.lastRefreshTimestamp == DateTime.MinValue)
{
this.ProcessCustomCounters();
string error;
var errors = new List <string>();
// this is the initial registration, register everything
this.defaultCounters.ForEach(pcName => this.RegisterCounter(pcName, string.Empty, win32Instances, clrInstances, false, out error));
foreach (PerformanceCounterCollectionRequest req in this.Counters)
{
this.RegisterCounter(
req.PerformanceCounter,
req.ReportAs,
win32Instances,
clrInstances,
true,
out error);
if (!string.IsNullOrWhiteSpace(error))
{
errors.Add(
string.Format(
CultureInfo.InvariantCulture,
Resources.PerformanceCounterCheckConfigurationEntry,
req.PerformanceCounter,
error));
}
}
if (errors.Any())
{
// send out the unified error message
PerformanceCollectorEventSource.Log.CounterCheckConfigurationEvent(
errors.Count.ToString(CultureInfo.InvariantCulture),
this.Counters.Count.ToString(CultureInfo.InvariantCulture),
string.Join(Environment.NewLine, errors));
}
}
else
{
// this is a periodic refresh
this.RefreshCounters(win32Instances, clrInstances);
}
// as per MSDN, we need to wait at least 1s before proceeding with counter collection
Thread.Sleep(TimeSpan.FromSeconds(1));
this.lastRefreshTimestamp = DateTime.Now;
}