Exemplo n.º 1
0
 protected override bool ReleaseHandle()
 {
     return(PdhApi.PdhRemoveCounter(handle) == 0);
 }
Exemplo n.º 2
0
 protected override bool ReleaseHandle()
 {
     return(PdhApi.PdhCloseLog(handle, PdhApi.PDH_FLAGS_CLOSE_QUERY) == 0);
 }
Exemplo n.º 3
0
 protected override bool ReleaseHandle()
 {
     return(PdhApi.PdhCloseQuery(handle) == 0);
 }
Exemplo n.º 4
0
        /// <summary>
        /// gets specified performance counter from the first instance of the WMI class Gpu
        /// </summary>
        /// <param name="strCounterName">Name of a Gpu counter</param>
        public void getGpuCounter(string strCounterName)
        {
            try
            {
                string className     = "Gpu";
                string strGpuCounter = "";

                // Performs WMI object query in selected namespace
                string          wmiScope = target + nvWmiNamespace;
                ManagementScope scope    = new ManagementScope(wmiScope);
                WqlObjectQuery  wqlQuery = new WqlObjectQuery("select * from " + className);
                scope.Connect();

                ManagementObjectSearcher searcher      = new ManagementObjectSearcher(scope, wqlQuery, null);
                ManagementClass          classInstance = new ManagementClass(target + nvWmiNamespace, className, null);

                foreach (ManagementObject gpu in searcher.Get())
                {
                    // printing out some properties
                    gpu.Get();                             // bind WMI object to an instance of the .NET ManagementObject

                    uint   id      = (uint)gpu["id"];      // GPU ID
                    uint   nvapiId = (uint)gpu["nvapiId"]; // GPU NVAPI ID
                    string name    = (string)gpu["name"];  // GPU name

                    strGpuCounter = string.Format(@"\NVIDIA GPU(#{0:d} {1} (id={2:d}, NVAPI ID={3:d}))\{4}", id - 1, name, id, nvapiId, strCounterName);
                    break; // bail out with the perf counter for the 1st GPU in a system
                }

                PdhQueryHandle   query;
                PdhCounterHandle counter;

                // result is PDH_STATUS in C++
                UInt32 result = PdhApi.PdhOpenQuery(null, IntPtr.Zero, out query);
                if (result != 0)
                {
                    Console.WriteLine("error opening performance query, status={0:d} (0x{0:X8})", result);
                    return;
                }

                // Add the counter that we want to see
                // The PdhEnumXXX methods can be used to discover them
                result = PdhApi.PdhAddCounter(query, strGpuCounter, IntPtr.Zero, out counter);
                if (result != 0)
                {
                    // 0xC0000BCD (PDH_ENTRY_NOT_IN_LOG_FILE) means the counter was not found in the set,
                    // happens when counter name is mistyped or non-localized string used in localized OS
                    Console.WriteLine("error adding counter, status={0:d} (0x{0:X8})", result);
                    return;
                }

                do
                {
                    result = PdhApi.PdhCollectQueryData(query);
                    if (result == 0)
                    {
                        PDH_FMT_COUNTERVALUE value;
                        result = PdhApi.PdhGetFormattedCounterValue(counter, PdhFormat.PDH_FMT_DOUBLE, IntPtr.Zero, out value);
                        if (value.CStatus == 0)
                        {
                            Console.WriteLine("temperature = {0:g}", value.doubleValue);
                        }
                        else
                        {
                            // 0xC0000BC6 (PDH_INVALID_DATA) can be returned when more samples are needed to calculate the value.
                            // Report error and continue calling PdhCollectQueryData
                            Console.WriteLine("error retrieving counter value, status={0:d} (0x{0:X8})", value.CStatus);
                        }
                    }
                    System.Threading.Thread.Sleep(1000);
                }while (result == 0 && !Console.KeyAvailable);
            }
            catch (ManagementException e)
            {
                Console.WriteLine("Exception caught: " + e.Message);
                Console.WriteLine("Stack trace: " + e.StackTrace);
            }
        }