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(12) United States Patent
(io) Patent No.: (45) Date of Patent:
US 7,424,633 B2 Sep. 9, 2008
(54) METHOD FOR ESTIMATING POWER CONSUMPTION OF A CPU
(75) Inventor: Sung-Jen Hsiang, Guangdong (CN)
(73) Assignee: Hon Hai Precision Industry Co., Ltd.,
Tu-Cheng, Taipei Hsien (TW)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 305 days.
(21) Appl.No.: 11/308,996
(22) Filed: Jun. 6, 2006
(65) Prior Publication Data
US 2006/0294408 Al Dec. 28, 2006 (30) Foreign Application Priority Data Jun. 24, 2005 (CN) 2005 1 0035553
(51) Int. CI.
(52) U.S. CI 713/340; 713/300
(58) Field of Classification Search 713/300-340
See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
6,002,878 A * 12/1999 Gehmanetal 713/340
6,330,703 Bl* 12/2001 Saito et al 716/4
6,845,456 Bl 1/2005 Menezes et al.
2002/0084798 Al * 7/2002 Osburn et al 324/765
* cited by examiner
Primary Examiner—Dennis M Butler
(74) Attorney, Agent, or Firm—Winston Hsu
This invention provides a method for testing the power consumption of a CPU. This method involves recording energy output data from a controllable energy input through a CPU emulator. These data is used for assessing the power transferring efficiency. The CPU emulator is then replaced with a CPU, and then a program is run such that the CPU will maximize energy consumption. The energy consumption data is recorded and analyzed with regards to the power transferring efficiency estimating the power consumption of the CPU.
11 Claims, 6 Drawing Sheets