公开(公告)号：JP2000194436A

公开(公告)日：2000-07-14

申请号：JP36440698

申请日：1998-12-22

Applicant: IBM

Inventor： SHIMOTOONO SUSUMU ,  FURUICHI SANEHIRO ,  AIHARA TATSU

IPC: G06F1/32 ,  G06F1/04

Abstract: PROBLEM TO BE SOLVED: To obtain a method and a device which change the operation speed for a CPU in accordance with the residual quantity of unprocessed messages in a computer system including an operating system (OS), especially in a multitask operating system capable of simultaneously and parallelly processing plural jobs (tasks). SOLUTION: In this configuration, a computer including a processor capable of dynamically changing operation speeds includes (a) a program performing processing in a prescribed processing unit, (b) a means which calculates the time difference between preparation time in the prescribed processing unit and the present time (432) and (c) means (436, 450, etc)., which change the operation speed of the processor to be faster than the current one when the time difference is larger than a 1st value and change the operation speed of the processor to be slower than the current one when the time difference is smaller than a 2nd value.

公开(公告)号：JPH11353052A

公开(公告)日：1999-12-24

申请号：JP13846598

申请日：1998-05-20

Applicant: IBM

Inventor： FURUICHI SANEHIRO ,  AIHARA TATSU ,  SHIMOTOONO SUSUMU

IPC: G06F1/04 ,  G06F1/32 ,  G06F9/318 ,  G06F11/34

Abstract: PROBLEM TO BE SOLVED: To refer to a performance index, to control the operation speed of a processor and to reduce power consumption by referring to a user mode instruction number executed in prescribed time and changing the operation speed of the processor. SOLUTION: Clock signals inputted to a CPU 3 are controlled by a controller 11. The control of the clock signals is executed by changing the frequency of the clock signals and stopping the supply of the clock signals if the CPU 3 can comply with it. The controller 11 observes the operation of the CPU 3 and monitors input from a sensor 13. For the observation of the CPU 3, for instance, a cache error rate, the number of access to a non-cacheable memory, an I/O instruction ratio or the like, a total execution instruction number per unit time and the execution instruction number of a user mode are considered. An I/O instruction or the like is executed in a system mode and discriminated from the user mode. By using the information, the controller 11 controls the operation of a clock oscillator 9 and the CPU 3.

公开(公告)号：JPH1173255A

公开(公告)日：1999-03-16

申请号：JP23004697

申请日：1997-08-26

Applicant: IBM

Inventor： FURUICHI SANEHIRO ,  AIHARA TATSU

IPC: G06F1/26 ,  G06F1/28 ,  G06F1/32

Abstract: PROBLEM TO BE SOLVED: To reduce the power of a computer. SOLUTION: This computer is provided with main execution applications 42-46, resource manager 10 for examining the using situations of inspected devices, and policy manager 20 for receiving job type decision information related with the main execution applications and the using situations of the inspected devices from the resource manager 10, and deciding a job type corresponding to the job type decision information among job types preliminarily decided for the main execution applications. Then, the resource manager 10 receives the job type corresponding to the job type decision information from the policy manager 20, and sets the parameters of controlled devices 32-40 preliminarily decided for the job type in the controlled devices. Also, the job type communicated from the policy manager can be a job type name or the group of the operation modes of the controlled devices.