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Delphi Get CPU information

Posted on 2014-09-08
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Last Modified: 2015-03-05
Hello,
I need my delphi application to get some CPU information:
CPU Name
Number of cores
Percentage of use per core

Is there any way to get it ?
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Question by:Slinkkkk
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5 Comments
 
LVL 27

Assisted Solution

by:Sinisa Vuk
Sinisa Vuk earned 250 total points
ID: 40310981
Depends on Delphi version you use....but quick info - example and blogs:
http://delphi.cjcsoft.net/viewthread.php?tid=46937
... using smbios - great example: theroadtodelphi blog
...or WMI: theroadtodelphi blog II
... using great components: MiTeC System Information Component Suite
... and more on Torry
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LVL 19

Expert Comment

by:MerijnB
ID: 40311466
A little addition to Sinisa,

I've been using MiTeC for years for this (which in turn uses smbios), but quite recently stopped using it because of continues different kind of problems. I'd advice to go the WMI route, Sinisa's link on WMI looks quite nice :)
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LVL 38

Accepted Solution

by:
Geert Gruwez earned 250 total points
ID: 40316769
WMI ... i use this to list several specs from servers:
function UIToStr(value: OleVariant): string;
begin
  if VarIsNull(Value) or VarIsEmpty(Value) then
    Result := '0'
  else
    Result := UIntToStr(Value);
end;

function PercentageStr(Size, FreeSpace: OleVariant): string;
var S, F: UInt64;
  P: Extended;
begin
  P := 0;
  S := 0;
  F := 0;
  if not (VarIsNull(Size) or VarIsEmpty(Size)) then
    S := Size;
  if not (VarIsNull(FreeSpace) or VarIsEmpty(FreeSpace)) then
    F := FreeSpace;
  if S <> 0 then
    P := F/S*100;
  Result := Format('%.2f', [P]) + '%';
end;

function BytesToTextString(Size: OleVariant; Precision: integer = 2; Factor: Integer = 1024; Suffix: string = 'Kb'): string;
var S: UInt64;
  P: Extended;
begin
  S := 0;
  if not (VarIsNull(Size) or VarIsEmpty(Size)) then
    S := Size;
  P := S / Factor;
  Result := Format('%.*f', [Precision, P]) + Suffix;
end;

function GBStr(Size: OleVariant; Precision: integer = 2): string;
begin
  Result := BytesToTextString(Size, Precision, 1024*1024*1024, 'Gb');
end;

function MBStr(Size: OleVariant; Precision: integer = 2): string;
begin
  Result := BytesToTextString(Size, Precision, 1024*1024, 'Mb');
end;

procedure TDiscoverServerJobThread.JobDiscoverListDrives(Server, UserName, Password: string; List: TStrings);
const
  wbemFlagForwardOnly = $00000020;
var
  FSWbemLocator: OLEVariant;
  FWmiService: OLEVariant;
  FWbemObjectSet: OLEVariant;
  FWbemObject: OLEVariant;
  oEnum: IEnumVariant;
  iValue: LongWord;
begin
  List.Clear;

  // connect to the remote computer
  FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
  FWmiService := FSWbemLocator.ConnectServer(Server, 'root\CIMV2', UserName, Password);
  List.Add('SERVER DISCOVERY START: ' + Server);

{$REGION 'MOTHERBOARD'}
  // list the properties of motherboard
  List.Add('ITEM: MOTHER BOARD');
  try
    fWbemObjectSet := FWMIService.ExecQuery('SELECT * FROM Win32_BaseBoard', 'WQL', wbemFlagForwardOnly);
    oEnum := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;

    List.Add('Name;Caption;Description;Manufacturer;Model;Product;Status;Version');
    while (oEnum.Next(1, FWbemObject, iValue) = 0) and not Terminated do
    begin
      List.Add(Format('%s;%s;%s;%s;%s;%s;%s;%s',[
        FWbemObject.Name,
        FWbemObject.Caption,
        FWbemObject.Description,
        FWbemObject.Manufacturer,
        FWbemObject.Model,
        FWbemObject.Product,
        FWbemObject.Status,
        FWbemObject.Version
        ]));
      FWbemObject := Unassigned;
    end;
  except
    on E: Exception do
      List.Add('Error listing properties of mother board: ' + E.Message);
  end;
  List.Add('ITEM END: MOTHER BOARD');
{$ENDREGION}

{$REGION 'COMPUTER SYSTEM'}
  // list the properties of motherboard
  List.Add('ITEM: COMPUTER SYSTEM');
  try
    fWbemObjectSet := FWMIService.ExecQuery('SELECT * FROM Win32_ComputerSystem', 'WQL', wbemFlagForwardOnly);
    oEnum := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;

    List.Add('Name;Caption;Description;Manufacturer;Model;NumberOfLogicalProcessors;NumberOfProcessors;TotalPhysicalMemory;Status');
    while (oEnum.Next(1, FWbemObject, iValue) = 0) and not Terminated do
    begin
      List.Add(Format('%s;%s;%s;%s;%s;%s;%s;%s;%s',[
        FWbemObject.Name,
        FWbemObject.Caption,
        FWbemObject.Description,
        FWbemObject.Manufacturer,
        FWbemObject.Model,
        UIToStr(FWbemObject.NumberOfLogicalProcessors),
        UIToStr(FWbemObject.NumberOfProcessors),
        GBStr(FWbemObject.TotalPhysicalMemory, 0),
        FWbemObject.Status
        ]));
      FWbemObject := Unassigned;
    end;
  except
    on E: Exception do
      List.Add('Error listing properties of computer system: ' + E.Message);
  end;
  List.Add('ITEM END: COMPUTER SYSTEM');
{$ENDREGION}

{$REGION 'PROCESSORS'}
  // list the properties of motherboard
  List.Add('ITEM: PROCESSORS');
  try
    fWbemObjectSet := FWMIService.ExecQuery('SELECT * FROM Win32_Processor', 'WQL', wbemFlagForwardOnly);
    oEnum := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;

    List.Add('Name;Caption;Description;Manufacturer;ProcessorId;NumberOfCores;NumberOfLogicalProcessors;Status');
    while (oEnum.Next(1, FWbemObject, iValue) = 0) and not Terminated do
    begin
      List.Add(Format('%s;%s;%s;%s;%s;%s;%s;%s',[
        FWbemObject.Name,
        FWbemObject.Caption,
        FWbemObject.Description,
        FWbemObject.Manufacturer,
        FWbemObject.ProcessorId,
        UIToStr(FWbemObject.NumberOfCores),
        UIToStr(FWbemObject.NumberOfLogicalProcessors),
        FWbemObject.Status
        ]));
      FWbemObject := Unassigned;
    end;
  except
    on E: Exception do
      List.Add('Error listing properties of processors: ' + E.Message);
  end;
  List.Add('ITEM END: PROCESSORS');
{$ENDREGION}

{$REGION 'OPERATINGSYSTEM'}
  // list the properties of motherboard
  List.Add('ITEM: OPERATINGSYSTEM');
  try
    fWbemObjectSet := FWMIService.ExecQuery('SELECT * FROM Win32_OperatingSystem', 'WQL', wbemFlagForwardOnly);
    oEnum := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;

    List.Add('Name;Caption;Description;Manufacturer;Status;Version');
    while (oEnum.Next(1, FWbemObject, iValue) = 0) and not Terminated do
    begin
      List.Add(Format('%s;%s;%s;%s;%s;%s',[
        FWbemObject.Name,
        FWbemObject.Caption,
        FWbemObject.Description,
        FWbemObject.Manufacturer,
        FWbemObject.Status,
        FWbemObject.Version
        ]));
      FWbemObject := Unassigned;
    end;
  except
    on E: Exception do
      List.Add('Error listing properties of mother board: ' + E.Message);
  end;
  List.Add('ITEM END: OPERATINGSYSTEM');
{$ENDREGION}

{$REGION 'PHYSICAL DRIVES'}
  // list the physical drives
  List.Add('ITEM: PHYSICAL DRIVES');
  try
    fWbemObjectSet := FWMIService.ExecQuery('SELECT * FROM CIM_DiskDrive', 'WQL', wbemFlagForwardOnly);
    oEnum := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;

    List.Add(Format('%s;%s;%s;%s;%s',['Name', 'Caption', 'Description', 'DeviceId', 'Status']));
    while (oEnum.Next(1, FWbemObject, iValue) = 0) and not Terminated do
    begin
      List.Add(Format('%s;%s;%s;%s;%s',[
        FWbemObject.Name,
        FWbemObject.Caption,
        FWbemObject.Description,
        FWbemObject.DeviceId,
        FWbemObject.Status
        ]));
      FWbemObject := Unassigned;
    end;
  except
    on E: Exception do
      List.Add('Error listing physical drives: ' + E.Message);
  end;
  List.Add('ITEM END: PHYSICAL DRIVES');
{$ENDREGION}

{$REGION 'LOGICAL DISKS'}
  // list the logical disks
  List.Add('ITEM: LOGICAL DISKS');
  try
    fWbemObjectSet := FWMIService.ExecQuery('SELECT * FROM CIM_LogicalDisk', 'WQL', wbemFlagForwardOnly);
    oEnum := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;

    List.Add('Name;Caption;Description;DeviceId;Size;SizeGb;FreeSpace;FreeSpaceGb,Percentage,PercentageStr');
    while (oEnum.Next(1, FWbemObject, iValue) = 0) and not Terminated do
    begin
      List.Add(Format('%s;%s;%s;%s;%s;%s;%s;%s;%s',[
        FWbemObject.Name,
        FWbemObject.Caption,
        FWbemObject.Description,
        FWbemObject.DeviceId,
        UIToStr(FWbemObject.Size),
        GbStr(FWbemObject.Size),
        UIToStr(FWbemObject.FreeSpace),
        GbStr(FWbemObject.FreeSpace),
        PercentageStr(FWbemObject.Size, FWbemObject.FreeSpace)
        ]));
      FWbemObject := Unassigned;
    end;
  except
    on E: Exception do
      List.Add('Error listing logical disks: ' + E.Message);
  end;
  List.Add('ITEM END: LOGICAL DISKS');
{$ENDREGION}

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