 Trailer control system |
| OF THE PRESENTLY PREFERRED EMBODIMENTS FIG. 1 depicts possible situations in operation of a ... |
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| Vehicle-trailer backing up jackknife detection and warning system |
| The jackknifing warning system of the present invention utilizes vehicle steering wheel angle ... |
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| Armored vehicle with rotatable swing-away turret |
| The present invention has as an object to provide an armored vehicle with a turret which is not ... |
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| System for controlling fluid flow |
| Preferred embodiments of the invention are illustrated in the FIGURES, like numerals being used to ... |
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| Fiber optic position sensor |
| Accordingly, it is a feature of the present invention to provide remote position sensing by ... |
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| Remote control device for vehicles |
| It is a major object of the present invention to provide a vehicular remote control device which ... |
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| Programming structure for user interfaces |
| With the above discussion in mind, it is one purpose of this invention to assist a person preparing ... |
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| Tone generating electronic device with paging module for verification of energy curtailment |
| A curtailment module is disclosed for enabling an energy provider to send a request to curtail ... |
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| Methods and apparatus for fuel control using inertial measurement data |
| The present invention is directed to methods and apparatus for fuel control using inertial ... |
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| Home cleaning robot |
| The present invention relates to autonomous, mobile, microprocessor-controlled home cleaning robots ... |
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Information processing apparatus with CPU-load-based clock frequency
| Details |
Inventors: Kawata, Kaoru;
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Heckler; Thomas M.
Assistant Examiner:
Attorney, Agent or Firm: Leydig, Voit & Mayer
An information processing apparatus includes a CPU, a memory, and a reference signal generator and operates based on a system clock signal generated by the reference signal generator. The apparatus includes a detection unit for detecting a CPU operational state and a clock control unit for controlling frequency of the system clock signal. The detection unit detects a CPU busy ratio as a CPU operational state indicating the load on the CPU. The clock control unit controls the frequency of the system clock so that the detected CPU busy ratio falls within a permissible range of CPA load. |
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DETAILED DESCRIPTION The present invention having been accomplished to solve the above problems,.
an object of the invention is to provide an information processing apparatus, such as a computer system, which is capable of reliably realizing a reduction in power consumption while preventing situations that the user undergoes discomfort due to a lowered CPU power.
According to a first aspect of the invention we provide a information processing apparatus which has a CPU, a memory and a reference signal generator and which operates based on a system clock signal generated by said reference signal generator, said information processing apparatus comprising: detection means for detecting a CPU operational state which indicates a load imposed on the CPU; and clock control means for controlling frequency of said system clock signal so that said CPU operational state detected by said detection means falls within a reference range which is predetermined as a proper CPU load range.
With the above information processing apparatus according to the first aspect of the invention, a CPU power currently required by the user is detected directly by the detection means and, based on the detection result, the system clock frequency dynamically changes so that the CPU power offered falls within a predetermined proper range.
Therefore, the CPU power can be adjusted without causing the user discomfort such as insufficiency of CPU power.
Accordingly, as the quantity of task (CPU power) decreases, power consumption of the computer system can be arranged without causing the user discomfort.
Still, since the required CPU power is detected directly, there is no need of being conscious of CPU power adjustment responsive to differences among individuals of users or to the contents of the task.
Also, when the user needs a high CPU power, the CPU power needed by the user can be offered under the condition that the CPU specification power is a maximum power, so that the system function is never impaired.
In such a case, also with respect to the range expressed as the high CPU power, if the CPU power required by the user is below the CPU specification power, the CPU power can be lowered to an extent corresponding to the difference and, thus, power consumption can be reduced as well
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Navigation and GPS 
