CN106292963A - Fan regulation and control method based on CPU power consumption - Google Patents

Abstract

The invention discloses a fan regulation and control method based on CPU power consumption, which comprises the steps of testing the duty ratio of a fan required by a CPU under different running power consumptions in a research and development stage, and writing the corresponding relation between the power consumption and the duty ratio into BMC; in the running process of the server, the BMC acquires the power consumption value of the CPU in real time, and outputs corresponding PWM to adjust the rotating speed of the fan so as to ensure the air quantity required by the heat dissipation of the CPU. Compared with the prior art, the fan control method based on the CPU power consumption can adjust the rotating speed of the fan according to the actual heat dissipation requirement of the CPU, improve the response speed of the fan, ensure that the heat generated by the CPU can be dissipated in time, ensure that the CPU is not over-temperature under all working conditions, and effectively reduce the system power consumption.

Description

A fan control method based on CPU power consumption

technical field

The invention relates to the field of electronic heat dissipation, in particular to a fan control method based on CPU power consumption.

Background technique

For air-cooled and heat-dissipating servers, in order to reduce fan power consumption and noise while meeting heat dissipation requirements, the fan speed is usually adjusted based on the CPU temperature. When the CPU temperature is high, a larger air volume is required, and the fan speed is correspondingly higher; otherwise, the fan speed is lower. This fan control strategy is more intuitive and can ensure that the CPU temperature does not exceed the limit under most working conditions.

This fan control strategy has certain limitations. When the CPU power consumption increases instantaneously, a high air volume is required to dissipate the generated heat. However, due to the lag of the temperature increase, the fan speed is relatively slow, and the CPU may be short-timed. overheating conditions.

Published related patent documents: titled "CPU power supply circuit protection system", which discloses "a CPU power supply circuit protection system, the voltage setting pin of the CPU power controller is connected to the voltage setting pin of the CPU, and the voltage lead The pin is connected to the power supply, the feedback pin is connected to the output pin of the detection circuit, the detection pin is connected to the thermistor through the detection pin of the electronic component, the first control pin is connected to the control pin of the CPU, and the second control pin The pin is connected to the fan on the motherboard through the BMC chip on the computer motherboard, the third control pin is connected to the control pin of the electronic component, the input pin of the electronic component is connected to the power supply and grounded through the second capacitor, and the voltage pin is connected to the voltage The source is grounded through the first capacitor, the output pin is connected to the voltage pin of the CPU through the inductor, the third capacitor is connected between the voltage pin of the CPU and the ground, and the first and second detection pins of the detection circuit are respectively connected to The two ends of the inductance. The CPU power supply circuit protection system can protect the CPU power supply circuit during the working process of the computer".

Titled "Server fan control method, control device and server", the document discloses "Server fan control method, control device and server, which are applied to the central processing unit CPU of the server, and the server also includes a baseboard management controller BMC , the method includes: obtaining fan state data; adjusting the original fan speed regulation strategy of the BMC according to the fan state data to obtain an updated fan speed regulation strategy; sending an updated fan speed regulation strategy to the BMC, so that the BMC restarts the speed regulation control module Then make update fan speed regulation strategy take effect.The present invention obtains fan speed regulation strategy by real-time obtaining fan state data and according to fan state data adjustment original fan speed regulation strategy to obtain updated speed regulation strategy, and after restarting the speed regulation control module by BMC, make this The fan speed control policy takes effect, so there is no need to restart the BMC, so that the fan speed control policy can take effect in a very short time, which improves the debugging efficiency of the fan speed policy, so that the fan can reach a balance between power consumption and heat dissipation." .

The above-mentioned published documents and the technical problems to be solved in the content of the present invention adopt different technical means.

Contents of the invention

The technical task of the present invention is to provide a fan control method based on CPU power consumption.

The technical task of the present invention is realized in the following manner, the method is in the research and development stage, test the fan duty cycle required by the CPU under different operating power consumption, and write the corresponding relationship between power consumption and duty cycle in the BMC ; During the running of the server, the BMC obtains the CPU power consumption value in real time, and outputs the corresponding PWM to adjust the fan speed to ensure the air volume required for CPU heat dissipation.

The specific operation steps of this method are as follows:

In the research and development stage, use the PTU pressurization tool to make the CPU work under different loads, manually adjust the fan duty cycle, control the CPU temperature at the design requirement value, and record the fan duty cycle required for different CPU power consumption; Write the corresponding relationship between CPU power consumption and fan duty cycle into the BMC; when the server is running, the BMC obtains the CPU power consumption from the register address in the CPU in real time, and outputs the corresponding duty cycle to the fan control board according to the corresponding relationship; the fan control board will The PWM signal is transmitted to the fan to complete the regulation of the fan speed.

When the power consumption of the CPU is greatly increased in a short period of time, the fan responds in time according to the increase in heat generation to avoid the risk of overheating; when the power consumption of the CPU decreases, the server uses a lower fan speed to ensure that the system normal heat dissipation and reduce the total power consumption of the system.

Compared with the prior art, a fan control method based on CPU power consumption of the present invention can adjust the fan speed according to the actual heat dissipation needs of the CPU, improve the response speed of the fan, ensure that the heat generated by the CPU can be dissipated in time, and ensure that all Under working conditions, the CPU does not overheat, effectively reducing system power consumption.

Description of drawings

Accompanying drawing 1 is a schematic flowchart of a fan control method based on CPU power consumption.

detailed description

Example 1:

The fan control method based on CPU power consumption is to test the fan duty cycle required by the CPU under different operating power consumption in the research and development stage, and write the corresponding relationship between power consumption and duty cycle into the BMC; In the process, the BMC obtains the CPU power consumption value in real time, and outputs the corresponding PWM to adjust the fan speed to ensure the air volume required for CPU heat dissipation.

The specific operation steps are as follows:

In the research and development stage, use the PTU pressurization tool to make the CPU work under different loads, manually adjust the fan duty cycle, control the CPU temperature at the design requirement value, and record the fan duty cycle required for different CPU power consumption; Write the corresponding relationship between CPU power consumption and fan duty cycle into the BMC; when the server is running, the BMC obtains the CPU power consumption from the register address in the CPU in real time, and outputs the corresponding duty cycle to the fan control board according to the corresponding relationship; the fan control board will The PWM signal is transmitted to the fan to complete the regulation of the fan speed. When the power consumption of the CPU is greatly increased in a short period of time, the fan responds in time according to the increase in heat generation to avoid the risk of overheating; when the power consumption of the CPU decreases, the server uses a lower fan speed to ensure that the system normal heat dissipation and reduce the total power consumption of the system.

Adjust the fan speed according to the actual heat dissipation needs of the CPU, improve the response speed of the fan, ensure that the CPU does not overheat under all working conditions, ensure that the heat generated by the CPU can be dissipated in time, and effectively reduce system power consumption.

Through the above specific implementation manners, those skilled in the technical field can easily realize the present invention. However, it should be understood that the present invention is not limited to the above-mentioned several specific implementation manners. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims (3)

1. A fan control method based on CPU power consumption, characterized in that, the method is in the research and development stage, testing the fan duty cycle required by the CPU under different operating power consumption, and the corresponding power consumption and duty cycle The relationship is written into the BMC; during the running of the server, the BMC obtains the CPU power consumption value in real time, and outputs the corresponding PWM to adjust the fan speed to ensure the air volume required for CPU heat dissipation. 2. A kind of fan regulation and control method based on CPU power consumption according to claim 1, is characterized in that, the specific operation steps of this method are as follows: In the research and development stage, use the PTU pressurization tool to make the CPU work under different loads, manually adjust the fan duty cycle, control the CPU temperature at the design requirement value, and record the fan duty cycle required for different CPU power consumption; Write the corresponding relationship between CPU power consumption and fan duty cycle into the BMC; when the server is running, the BMC obtains the CPU power consumption from the register address in the CPU in real time, and outputs the corresponding duty cycle to the fan control board according to the corresponding relationship; the fan control board will The PWM signal is transmitted to the fan to complete the regulation of the fan speed. 3. A fan control method based on CPU power consumption according to claim 2, characterized in that, when the CPU power consumption is greatly increased in a short period of time, the fan responds in time according to the increase in calorific value to avoid overheating Risk; when the CPU power consumption is reduced, the server uses a lower fan speed to ensure normal heat dissipation of the system and reduce the total power consumption of the system due to the reduced heat generation.