注意：算法仅供参考。

cpuusage.cs

1 using System;  2 using System.Collections.Generic;  3 using System.Diagnostics;  4 using System.IO;  5 using System.Linq;  6 using System.Text;  7 using System.Threading;  8   9 namespace cpuusage 10 { 11     class Program 12     { 13         const string VERSION = "cpuusage v0.1.0"; 14         static readonly Dictionary
     
       _caches = new Dictionary
      
       (); 15         static string _format = "list"; 16         static int _sleep = 1000; 17         static int _times = -1; 18         static bool _pauseWhenFinish = false; 19         static StreamWriter  _sw = null; 20         static bool _listProcessNames = false; 21         static bool _printUsage = false; 22         static bool _printVersion = false; 23  24         static void Main(string[] args) 25         { 26             var processNames = GetProcessNamesAndParseArgs(args); 27             if (_printVersion) 28             { 29                 PrintVersion(); 30             } 31             if (_printUsage) 32             { 33                 PrintUsage(); 34             } 35             else if (_listProcessNames) 36             { 37                 PrintProcessNames(processNames); 38             } 39             else 40             { 41                 switch (_format) 42                 { 43                     case "table": 44                         PrintToTable(processNames); 45                         break; 46                     case "csv": 47                         PrintToCsv(processNames); 48                         break; 49                     case "list": 50                         PrintToList(processNames); 51                         break; 52                     default: 53                         Fault(1, "ERROR: -f argument error"); 54                         break; 55                 } 56             } 57             if (_pauseWhenFinish) { 58                 Console.WriteLine(); 59                 Console.Write("Press any key to EXIT..."); 60                 Console.ReadKey(true); 61             } 62             if (_sw != null) 63             { 64                 _sw.Close(); 65             } 66         } 67          68         static void Fault(int returnCode, string message) 69         { 70             Console.WriteLine(message); 71             if (_sw != null) 72             { 73                 _sw.Close(); 74             } 75             Environment.Exit(returnCode); 76         } 77          78         static void PrintProcessNames(string[] processNames) 79         { 80             foreach (var name in processNames) 81             { 82                 Output(string.Format("{0}{1}", name, Environment.NewLine)); 83             } 84         } 85          86         static void PrintToList(string[] processNames) 87         { 88             if (processNames == null || processNames.Length == 0) 89             { 90                 return; 91             } 92             const string nameTitle = "Name"; 93             const string cpuUsageTitle = "CPU Usage (%)"; 94             var nameColumnMaxLength = Math.Max(processNames.Max(n => n.Length), nameTitle.Length); 95             var cpuUsageColumnMaxLength = cpuUsageTitle.Length; 96             var format = string.Format("{
    {0,-{0}}}  {
    {1:0.##}}", nameColumnMaxLength); 97             var head = string.Format(format, nameTitle, cpuUsageTitle).ToUpper(); 98             head += Environment.NewLine + string.Format(format, new string('-', nameColumnMaxLength), new string('-', cpuUsageColumnMaxLength)); 99             var sb = new StringBuilder();100             while (_times != 0)101             {102                 sb.AppendLine(head);103                 foreach (var name in processNames)104                 {105                     try106                     {107                         sb.AppendFormat(format, name, GetProcessCpuUsage(name));108                         sb.AppendLine();109                     }110                     catch(Exception)111                     {112                     }113                 }114                 Output(sb.ToString());115                 sb.Clear();116                 if(_times > 0) {117                     if (--_times == 0) {118                         break;119                     }120                 }121                 Thread.Sleep(_sleep);122                 sb.AppendLine();123             }124         }125         126         static void PrintToTable(string[] processNames)127         {128             if (processNames == null || processNames.Length == 0)129             {130                 return;131             }132             var sb = new StringBuilder();133             var sb1 = new StringBuilder();134             foreach (var name in processNames)135             {136                 sb.AppendFormat("{0,-6}  ", name);137                 sb1.AppendFormat("{0}  ", new string('-', Math.Max(name.Length, 6)));138             }139             sb.Remove(sb.Length - 2, 2);140             sb1.Remove(sb1.Length - 2, 2);141             sb.AppendLine();142             sb.Append(sb1.ToString());143             sb.AppendLine();144             var head = sb.ToString();145             Output(head);146             sb1 = null;147             sb.Clear();148             while (_times != 0)149             {150                 for (int i = 0; i < processNames.Length; i++)151                 {152                     var name = processNames[i];153                     var value = "";154                     try155                     {156                         value = GetProcessCpuUsage(name).ToString("0.00");157                     }158                     catch(Exception)159                     {160                     }161                     var length = Math.Max(name.Length, 6);162                     value = value.PadLeft(length);163                     if (i + 1 != processNames.Length) {164                         value = string.Format("{0}  ", value);165                     }166                     sb.Append(value);167                 }168                 Output(sb.ToString());169                 sb.Clear();170                 if(_times > 0) {171                     if (--_times == 0) {172                         break;173                     }174                 }175                 Thread.Sleep(_sleep);176                 sb.AppendLine();177             }178         }179         180         static void PrintToCsv(string[] processNames)181         {182             if (processNames == null || processNames.Length == 0)183             {184                 return;185             }186             var sb = new StringBuilder();187             foreach (var name in processNames)188             {189                 var tempName = name.Replace("\"", "\"\"");190                 if (name.Contains(",") || name.Contains(" ") || name.Contains("\""))191                 {192                     tempName = string.Format("\"{0}\"", tempName);193                 }194                 sb.AppendFormat("{0},", tempName);195             }196             sb.Remove(sb.Length - 1, 1);197             sb.AppendLine();198             var head = sb.ToString();199             Output(head);200             sb.Clear();201             while (_times != 0)202             {203                 for (int i = 0; i < processNames.Length; i++)204                 {205                     var name = processNames[i];206                     var value = "";207                     try208                     {209                         value = GetProcessCpuUsage(name).ToString("0.00");210                     }211                     catch(Exception)212                     {213                     }214                     if (i + 1 != processNames.Length)215                     {216                         value = string.Format("{0},", value);217                     }218                     sb.Append(value);219                 }220                 Output(sb.ToString());221                 sb.Clear();222                 if(_times > 0) {223                     if (--_times == 0) {224                         break;225                     }226                 }227                 Thread.Sleep(_sleep);228                 sb.AppendLine();229             }230         }231 232         static string[] GetProcessNamesAndParseArgs(string[] args)233         {234             if (args.Any(n => n.ToLower() == "-v"))235             {236                 _printVersion = true;237             }238             if (args.Length == 0 || args.Any(n => n.ToLower() == "-h"))239             {240                 _printUsage = true;241                 _printVersion = true;242                 _pauseWhenFinish = true;243                 return null;244             }245             _pauseWhenFinish = args.Any(n => n.ToLower() == "-p");246             if (args.Any(n => n.ToLower() == "-l"))247             {248                 _listProcessNames = true;249             }250             var arg = args.FirstOrDefault(n => n.ToLower().StartsWith("-f:"));251             if (arg != null) {252                 _format = arg.Substring(3).ToLower();253             }254             arg = args.FirstOrDefault(n => n.ToLower().StartsWith("-s"));255             if (arg != null) {256                 int s;257                 if (int.TryParse(arg.Substring(2), out s)) {258                     _sleep = s;259                 }260             }261             arg = args.FirstOrDefault(n => n.ToLower().StartsWith("-t"));262             if (arg != null) {263                 int t;264                 if (int.TryParse(arg.Substring(2), out t)) {265                     _times = t;266                 }267             }268             arg = args.FirstOrDefault(n => n.ToLower().StartsWith("-o:"));269             if (arg != null) {270                 var output = arg.Substring(3).ToLower();271                 try272                 {273                     _sw = File.CreateText(output);274                 }275                 catch(Exception ex)276                 {277                     if (_sw != null)278                     {279                         _sw.Close();280                     }281                     _sw = null;282                     Fault(2, string.Format("ERROR: {0}", ex.Message));283                 }284             }285             286             if (args.Contains("*"))287             {288                 return Process.GetProcesses().Select(n => n.ProcessName).OrderBy(n => n).Distinct().ToArray();289             }290 291             var r = args.Where(n => !n.StartsWith("-")).Select(n => GetFriendlyName(n)).ToArray();292             if (_listProcessNames && r.Length == 0)293             {294                 return Process.GetProcesses().Select(n => n.ProcessName).OrderBy(n => n).Distinct().ToArray();295             }296             return r;297         }298         299         static void Output(string message)300         {301             Console.Write(message);302             if (_sw == null)303             {304                 return;305             }306             try307             {308                 _sw.Write(message);309                 _sw.Flush();310             }311             catch (Exception)312             {313                 _sw.Close();314                 _sw = null;315             }316         }317         318         static void PrintUsage()319         {320             var n = Path.GetFileName(Environment.GetCommandLineArgs()[0]);321             var n1 = Path.GetFileNameWithoutExtension(n);322             Console.Write("Usage:{2}  {0} [-f:
       
        ] [-s
        
         ] [-t
         
          ] [-o:
          
           ] [-p] 
           
            {2} {0} -l [-o:
            
             ] [-p] [
             
              ]{2} -f output format, default to list.{2} -s sleep millisenconds, default to 1000.{2} -t times, default to forever.{2} -p pause when out of times.{2} -o output to file.{2} -l print name of processes only.{2} -h print help.{2} -v print version.{2}{2}Example:{2} {0} _Total Idle System Svchost {1}{2} {0} *{2} {0} * -f:csv -s200 -t10 > 1.csv{2} {0} -f:csv -s200 -t10 chrome firefox -o:2.csv{2}", n, n1, Environment.NewLine);323 }324 325 static void PrintVersion()326 {327 Console.WriteLine(VERSION);328 }329 330 static string GetFriendlyName(string instanceName)331 {332 var r = new StringBuilder(instanceName);333 for(int i=0; i
             
            
           
          
         
        
       
      
     

 

 

build.bat

1 @echo off 2 pushd "%~dp0" 3 set csfile=cpuusage.cs 4 set PATH="C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\bin\Roslyn";"C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\bin\Roslyn";"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\bin\Roslyn";"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64";"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN";C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319;C:\WINDOWS\Microsoft.NET\Framework64\v3.5;C:\WINDOWS\Microsoft.NET\Framework64\v2.0;%PATH% 5 csc.exe /target:exe /unsafe+ %csfile% 6 if ERRORLEVEL 1 (echo ERROR: %ERRORLEVEL%) else (echo Build Success) 7 echo. 8 echo Press any key to EXIT... 9 pause>nul10 popd

 

 

测试：将全部进程10秒中内的CPU使用率导出到CSV，然后查看图表（排除idle和cpuusage）。

C:\> cpuusage -t10 -s1000 -f:csv * > 1.csv