AppDomainResourcePerfCounters.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Management / AppDomainResourcePerfCounters.cs / 1305376 / AppDomainResourcePerfCounters.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Management { 
    using System; 
    using System.Configuration;
    using System.Web; 
    using System.Threading;

    internal class AppDomainResourcePerfCounters {
 
        private const  uint      NUM_SECONDS_TO_POLL = 5;
 
        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        internal static void Init() {
            if (_fInit)
                return;
 
            lock (_InitLock) {
                if (_fInit) 
                    return; 

                if (AppDomain.MonitoringIsEnabled) { 
                    PerfCounters.SetCounter(AppPerfCounter.APP_CPU_USED_BASE, 100);
                    _Timer = new Timer((new AppDomainResourcePerfCounters()).TimerCallback, null,
                                       NUM_SECONDS_TO_POLL * 1000, NUM_SECONDS_TO_POLL * 1000);
                } 
                _fInit = true;
            } 
        } 

        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        /////////////////////////////////////////////////////////////////////////////
        internal static void Stop() {
            if (_Timer == null) 
                return; // already stopped
 
            _StopRequested = true; 

            lock (_InitLock) { 
                if (_Timer != null) {
                    ((IDisposable)_Timer).Dispose();
                    _Timer = null;
                } 
            }
 
            // Wait for the _inProgressLock lock 
            while (_inProgressLock != 0) {
                Thread.Sleep(100); 
            }
        }

        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        // Static data 
        private static bool      _fInit                = false;
        private static object    _InitLock             = new object(); 
        private static Timer     _Timer                = null;
        private static int       _inProgressLock       = 0;
        private static bool      _StopRequested        = false;
 
        // Instance data
        private int       _MemUsageLastReported = 0; 
        private int       _CPUUsageLastReported = 0; 
        private TimeSpan  _TotalCPUTime;
        private DateTime  _LastCollectTime; 


        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        private AppDomainResourcePerfCounters() { 
            _TotalCPUTime = AppDomain.CurrentDomain.MonitoringTotalProcessorTime; 
            _LastCollectTime = DateTime.UtcNow;
        } 

        /////////////////////////////////////////////////////////////////////////////
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        private void TimerCallback(Object state) {
 
            if ( _StopRequested ||  // Stop has been called -- exit immediately 
                 !AppDomain.MonitoringIsEnabled || // Monitoring APIs will throw NotSupportedException if not-enabled
                 Interlocked.Exchange(ref _inProgressLock, 1) != 0) // Is some thread currently executing the callback 
            {
                return;
            }
 
            try {
                SetPerfCounters(); 
            } catch { // don't bubble up exceptions, since we are on a timer thread 
            } finally {
                Interlocked.Exchange(ref _inProgressLock, 0); 
            }
        }

        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        private void SetPerfCounters() { 

            //////////////////////////////////////////////////////////// 
            // Calculate memory: Limited to 2TB (Int32.MaxValue * 1024 bytes)
            long memInKB = (AppDomain.CurrentDomain.MonitoringSurvivedMemorySize / 1024); // Mem used in KB
            _MemUsageLastReported = (int) Math.Min(Int32.MaxValue, Math.Max(0, memInKB)); // Make sure its within 0 and Int32.MaxValue
            PerfCounters.SetCounter(AppPerfCounter.APP_MEMORY_USED, _MemUsageLastReported); 

            //////////////////////////////////////////////////////////// 
            // Calculate CPU 
            DateTime dtUtcNow = DateTime.UtcNow;
            TimeSpan newTotalCPUTime = AppDomain.CurrentDomain.MonitoringTotalProcessorTime; 

            double  timeElapsed = (dtUtcNow - _LastCollectTime).TotalMilliseconds; // Total time since last collect
            double  cpuTimeUsed = (newTotalCPUTime - _TotalCPUTime).TotalMilliseconds; // Total CPU time used since last collect
            int     cpuPercent  = (int) ((cpuTimeUsed * 100) / timeElapsed); // Percent of CPU time used 

            _CPUUsageLastReported = Math.Min(100, Math.Max(0, cpuPercent)); // Make sure it's within 0 and 100 
            PerfCounters.SetCounter(AppPerfCounter.APP_CPU_USED, _CPUUsageLastReported); 

            // Update variables for next time 
            _TotalCPUTime = newTotalCPUTime;
            _LastCollectTime = dtUtcNow;
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Management { 
    using System; 
    using System.Configuration;
    using System.Web; 
    using System.Threading;

    internal class AppDomainResourcePerfCounters {
 
        private const  uint      NUM_SECONDS_TO_POLL = 5;
 
        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        internal static void Init() {
            if (_fInit)
                return;
 
            lock (_InitLock) {
                if (_fInit) 
                    return; 

                if (AppDomain.MonitoringIsEnabled) { 
                    PerfCounters.SetCounter(AppPerfCounter.APP_CPU_USED_BASE, 100);
                    _Timer = new Timer((new AppDomainResourcePerfCounters()).TimerCallback, null,
                                       NUM_SECONDS_TO_POLL * 1000, NUM_SECONDS_TO_POLL * 1000);
                } 
                _fInit = true;
            } 
        } 

        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        /////////////////////////////////////////////////////////////////////////////
        internal static void Stop() {
            if (_Timer == null) 
                return; // already stopped
 
            _StopRequested = true; 

            lock (_InitLock) { 
                if (_Timer != null) {
                    ((IDisposable)_Timer).Dispose();
                    _Timer = null;
                } 
            }
 
            // Wait for the _inProgressLock lock 
            while (_inProgressLock != 0) {
                Thread.Sleep(100); 
            }
        }

        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        // Static data 
        private static bool      _fInit                = false;
        private static object    _InitLock             = new object(); 
        private static Timer     _Timer                = null;
        private static int       _inProgressLock       = 0;
        private static bool      _StopRequested        = false;
 
        // Instance data
        private int       _MemUsageLastReported = 0; 
        private int       _CPUUsageLastReported = 0; 
        private TimeSpan  _TotalCPUTime;
        private DateTime  _LastCollectTime; 


        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        private AppDomainResourcePerfCounters() { 
            _TotalCPUTime = AppDomain.CurrentDomain.MonitoringTotalProcessorTime; 
            _LastCollectTime = DateTime.UtcNow;
        } 

        /////////////////////////////////////////////////////////////////////////////
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        private void TimerCallback(Object state) {
 
            if ( _StopRequested ||  // Stop has been called -- exit immediately 
                 !AppDomain.MonitoringIsEnabled || // Monitoring APIs will throw NotSupportedException if not-enabled
                 Interlocked.Exchange(ref _inProgressLock, 1) != 0) // Is some thread currently executing the callback 
            {
                return;
            }
 
            try {
                SetPerfCounters(); 
            } catch { // don't bubble up exceptions, since we are on a timer thread 
            } finally {
                Interlocked.Exchange(ref _inProgressLock, 0); 
            }
        }

        ///////////////////////////////////////////////////////////////////////////// 
        /////////////////////////////////////////////////////////////////////////////
        ///////////////////////////////////////////////////////////////////////////// 
        private void SetPerfCounters() { 

            //////////////////////////////////////////////////////////// 
            // Calculate memory: Limited to 2TB (Int32.MaxValue * 1024 bytes)
            long memInKB = (AppDomain.CurrentDomain.MonitoringSurvivedMemorySize / 1024); // Mem used in KB
            _MemUsageLastReported = (int) Math.Min(Int32.MaxValue, Math.Max(0, memInKB)); // Make sure its within 0 and Int32.MaxValue
            PerfCounters.SetCounter(AppPerfCounter.APP_MEMORY_USED, _MemUsageLastReported); 

            //////////////////////////////////////////////////////////// 
            // Calculate CPU 
            DateTime dtUtcNow = DateTime.UtcNow;
            TimeSpan newTotalCPUTime = AppDomain.CurrentDomain.MonitoringTotalProcessorTime; 

            double  timeElapsed = (dtUtcNow - _LastCollectTime).TotalMilliseconds; // Total time since last collect
            double  cpuTimeUsed = (newTotalCPUTime - _TotalCPUTime).TotalMilliseconds; // Total CPU time used since last collect
            int     cpuPercent  = (int) ((cpuTimeUsed * 100) / timeElapsed); // Percent of CPU time used 

            _CPUUsageLastReported = Math.Min(100, Math.Max(0, cpuPercent)); // Make sure it's within 0 and 100 
            PerfCounters.SetCounter(AppPerfCounter.APP_CPU_USED, _CPUUsageLastReported); 

            // Update variables for next time 
            _TotalCPUTime = newTotalCPUTime;
            _LastCollectTime = dtUtcNow;
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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AppDomainResourcePerfCounters.cs source code in C# .NET

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