public static extern bool GetProcessMemoryInfo(IntPtr hProcess, out PROCESS_MEMORY_COUNTERS counters, uint size);
public void Refresh(DateTime now)
{
if (_disposed)
{
return;
}
try
{
using (var processHandle = SafeProcessHandle.OpenProcess(Pid, ProcessAccessFlags.QueryInformation))
{
unchecked
{
var counters = new PROCESS_MEMORY_COUNTERS();
NativeMethods.GetProcessMemoryInfo(processHandle.DangerousGetHandle(),
out counters, (uint)Marshal.SizeOf(counters));
WorkingSet = counters.WorkingSetSize;
PageFaultCount = counters.PageFaultCount;
PageFileUsage = counters.PagefileUsage;
PeakPageFileUsage = counters.PeakPagefileUsage;
PeakWorkingSet = counters.PeakWorkingSetSize;
PrivateBytes = counters.PrivateUsage;
long createTime = 0;
long exitTime = 0;
long kernelTime = 0;
long userTime = 0;
NativeMethods.GetProcessTimes(processHandle.DangerousGetHandle(),
ref createTime, ref exitTime, ref kernelTime, ref userTime);
var cpuTime = new TimeSpan(kernelTime + userTime);
CpuTime = string.Format(@"{0:00}:{1:00}:{2:00}", cpuTime.Hours, cpuTime.Minutes, cpuTime.Seconds);
var latestProcTime = cpuTime - _previousTotalProcTime;
var latestWallTime = (now - _lastCpuCheck).TotalMilliseconds;
_previousTotalProcTime = cpuTime;
_lastCpuCheck = now;
if (latestWallTime > 0)
{
var totalCpu = 100 * latestProcTime.TotalMilliseconds / latestWallTime;
var adjustedCpu = (int)Math.Round(totalCpu / Environment.ProcessorCount);
PercentCpu = adjustedCpu.ToString(CultureInfo.InvariantCulture);
}
else
{
PercentCpu = "0";
}
}
}
if (!_countersInitialized)
{
InitializePerformanceCounters();
}
ManagedBytes = (_committedBytesCounter != null) ? ((long)_committedBytesCounter.NextValue()) : (0);
}
catch (Exception e)
{
Logger.Error("Error refreshing process performance info", e);
}
}