Information usable in determining the quality of time produced by a clock of a processing environment is obtained. The information is obtained directly by an application program absent use of a supervisor service, such as an operating system or operating system service. The application program invokes...http://www.google.com.tw/patents/US20080028254?utm_source=gb-gplus-share專利 US20080028254 - DIRECTLY OBTAINING BY APPLICATION PROGRAMS INFORMATION USABLE IN DETERMINING CLOCK ACCURACY
