IOCTL_DISK_PERFORMANCE IOCTL (winioctl.h)

Enables performance counters that provide disk performance information.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
  (HANDLE) hDevice,             // handle to device
  IOCTL_DISK_PERFORMANCE,       // dwIoControlCode
  NULL,                         // lpInBuffer
  0,                            // nInBufferSize
  (LPVOID) lpOutBuffer,         // output buffer
  (DWORD) nOutBufferSize,       // size of output buffer
  (LPDWORD) lpBytesReturned,    // number of bytes returned
  (LPOVERLAPPED) lpOverlapped   // OVERLAPPED structure
);

Remarks

To disable the performance counters enabled by this control code, use the IOCTL_DISK_PERFORMANCE_OFF control code.

Requirements

See also

• DISK_PERFORMANCE
• DeviceIoControl
• Disk Management Control Codes
• IOCTL_DISK_PERFORMANCE_OFF