public static PerfomanceInfoData GetPerformanceInfo()
{
PerfomanceInfoData data = new PerfomanceInfoData();
PsApiPerformanceInformation perfInfo = new PsApiPerformanceInformation();
if (GetPerformanceInfo(out perfInfo, Marshal.SizeOf(perfInfo)))
{
/// data in pages
data.CommitTotalPages = perfInfo.CommitTotal.ToInt64();
data.CommitLimitPages = perfInfo.CommitLimit.ToInt64();
data.CommitPeakPages = perfInfo.CommitPeak.ToInt64();
/// data in bytes
Int64 pageSize = perfInfo.PageSize.ToInt64();
data.PhysicalTotalBytes = perfInfo.PhysicalTotal.ToInt64() * pageSize;
data.PhysicalAvailableBytes = perfInfo.PhysicalAvailable.ToInt64() * pageSize;
data.SystemCacheBytes = perfInfo.SystemCache.ToInt64() * pageSize;
data.KernelTotalBytes = perfInfo.KernelTotal.ToInt64() * pageSize;
data.KernelPagedBytes = perfInfo.KernelPaged.ToInt64() * pageSize;
data.KernelNonPagedBytes = perfInfo.KernelNonPaged.ToInt64() * pageSize;
data.PageSizeBytes = pageSize;
/// counters
data.HandlesCount = perfInfo.HandlesCount;
data.ProcessCount = perfInfo.ProcessCount;
data.ThreadCount = perfInfo.ThreadCount;
}
return(data);
}
/// <summary>
/// Update performance stats on timer.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void meterTimer_Tick(object sender, EventArgs e)
{
try
{
string cpuPerc = Math.Round(cpuCounter.NextValue(), MidpointRounding.AwayFromZero).ToString();
perfData = PsApiWrapper.GetPerformanceInfo();
string memPerc = Math.Round(100 - (((decimal)perfData.PhysicalAvailableBytes / (decimal)perfData.PhysicalTotalBytes) * 100), MidpointRounding.AwayFromZero).ToString();
cpuTextBox.Text = cpuPerc;
memTextBox.Text = memPerc;
if (connectButton.Text == "Dis&connect")
{
string portData = "C" + cpuPerc + "\rM" + memPerc + "\r";
meterPort.Write(portData);
}
}
catch (IOException)
{
//Serial failed, maybe device was unplugged? Disable serial and resume.
//Disable timer (so we only see error once)
meterTimer.Enabled = false;
//Dispose serial
DisposeSerial();
//Change form back
connectButton.Text = "&Connect";
comPortUpDown.Enabled = true;
MessageBox.Show("Communication with the device has been lost. Has it been unplugged?", "Serial I/O Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
//Now that serial is disconnected, it's safe to reenable timer.
meterTimer.Enabled = true;
}
catch (Exception caught)
{
//Disable timer (so we only see error once)
meterTimer.Enabled = false;
WinFormHelper.DisplayErrorMessage("Update meters", caught);
//Now that the timer is disabled, the program isn't very useful. Close.
exitApp = true;
this.Close();
}
}
