CN112671396A - Dynamic voltage frequency adjustment system and method and electronic equipment - Google Patents
Dynamic voltage frequency adjustment system and method and electronic equipment Download PDFInfo
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Abstract
The invention is suitable for the integrated circuit control field, and provides a dynamic voltage frequency adjustment system, a method and an electronic device, the system comprises a DVFS control module, a clock reference source, a frequency deviation detector, a voltage generation module and an oscillator, the DVFS control module is used for sending a frequency control word to the frequency deviation detector according to a frequency modulation and voltage regulation request, the frequency deviation detector is used for obtaining the frequency deviation of the current working clock of a digital circuit module according to the frequency control word and the reference clock provided by the clock reference source and sending the frequency deviation to the voltage generation module, the voltage generation module is used for providing the same working voltage for the oscillator and the digital circuit module and adjusting the current working voltage according to the frequency deviation, the oscillator is used for providing the working clock for the digital circuit module and adjusting the current working clock of the digital circuit module according to the current working voltage, thereby simplifying the voltage frequency adjustment control process and improving the response speed.
Description
Technical Field
The invention belongs to the field of integrated circuit control, and particularly relates to a dynamic voltage frequency adjusting system, a dynamic voltage frequency adjusting method and electronic equipment.
Background
DVFS (dynamic voltage frequency scaling) technology is widely used in various processors today, and it can effectively manage the power consumption of an electronic system to avoid waste. The conventional technical scheme comprises a voltage adjusting unit, a clock adjusting unit and a detecting unit of physical quantities such as frequency, temperature, voltage and the like, when application scenes are switched or performance/power consumption optimization is required due to strategies such as temperature control and the like, the detecting unit or external interruption sends a frequency adjusting requirement, a new frequency and a new voltage are retrieved through a pre-built-in voltage-frequency upper limit relation and then are respectively configured to the voltage adjusting unit and the clock adjusting unit, and the control complexity is high. It should be noted that, in order to optimize power, the voltage is required to be synchronously reduced when the frequency is reduced, but the response time of the two is not accurately predictable, and model analysis is usually required to be established or the sequence and the interval time of the two are strictly limited. Generally speaking, the DVFS strategy requires that the frequency is reduced first and then the voltage is reduced when optimizing power consumption; when the performance is optimized, the voltage is required to be increased firstly and then the frequency is required to be increased so as to safely realize the optimal performance and power consumption optimization.
Disclosure of Invention
The invention aims to provide a dynamic voltage frequency adjustment system, a dynamic voltage frequency adjustment method and electronic equipment, and aims to solve the problems of high complexity and low response speed of dynamic voltage frequency adjustment control in the prior art.
In one aspect, the present invention provides a dynamic voltage frequency adjustment system, including a DVFS control module, a clock reference source, a frequency deviation detector, a voltage generation module, and an oscillator, where the frequency deviation detector is respectively connected to the DVFS control module, the clock reference source, the voltage generation module, and the oscillator, the voltage generation module is further respectively connected to the oscillator and a digital circuit module, and the oscillator is further connected to the digital circuit, where,
the DVFS control module is used for sending frequency control words to the frequency deviation detector according to the frequency and voltage modulation request;
the clock reference source is used for providing a reference clock for the frequency deviation detector;
the frequency deviation detector is used for acquiring the frequency deviation of the current working clock of the digital circuit module according to the frequency control word and the reference clock and sending the frequency deviation to the voltage generation module;
the voltage generation module is used for providing the same working voltage for the oscillator and the digital circuit module and adjusting the current working voltage according to the frequency deviation;
the oscillator is used for providing a working clock for the digital circuit module and adjusting the current working clock of the digital circuit module according to the current working voltage.
Preferably, the clock frequency generated by the oscillator is less than or equal to the highest operable frequency of the digital circuit module.
Preferably, the oscillator and the digital circuit module are the same in direction and magnitude of frequency variation caused by PVT influence.
In another aspect, the present invention provides a dynamic voltage frequency adjustment method based on the above dynamic voltage frequency adjustment system, including the following steps:
when receiving a frequency modulation and voltage regulation request, the DVFS control module sends a frequency control word to the frequency deviation detector;
executing an adaptive voltage frequency adjustment process until a preset condition is met, the adaptive voltage frequency adjustment process comprising:
the frequency deviation detector acquires the frequency deviation of the current working clock of the digital circuit module according to the frequency control word and the reference clock provided by the clock reference source;
the voltage generation module adjusts the current working voltages of the digital circuit module and the oscillator according to the frequency deviation;
the oscillator adjusts the current working clock of the digital circuit module according to the current working voltage;
wherein the preset condition is that the frequency deviation is zero.
In another aspect, the present invention provides an electronic device comprising the dynamic voltage frequency adjustment system as described above.
The dynamic voltage frequency adjustment system provided by the embodiment of the invention comprises a DVFS control module, a clock reference source, a frequency deviation detector, a voltage generation module and an oscillator, wherein the DVFS control module is used for sending a frequency control word to the frequency deviation detector according to a frequency modulation and voltage regulation request, the clock reference source is used for providing a reference clock for the frequency deviation detector, the frequency deviation detector is used for obtaining the frequency deviation of the current working clock of a digital circuit module according to the frequency control word and the reference clock and sending the frequency deviation to the voltage generation module, the voltage generation module is used for providing the same working voltage for the oscillator and the digital circuit module and adjusting the current working voltage according to the frequency deviation, the oscillator is used for providing the working clock for the digital circuit module and adjusting the current working clock of the digital circuit module according to the current working voltage, thereby simplifying the voltage frequency adjustment control process and improving the response speed.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic voltage frequency adjustment system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dynamic voltage frequency adjustment system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an implementation of a dynamic voltage frequency adjustment method according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of frequency and voltage adjustments over time for different temperature and process variations for a conventional dynamic voltage frequency adjustment method;
FIG. 5 is a schematic diagram of the frequency and voltage adjustments over time under different process variations for the dynamic voltage frequency adjustment method according to the second embodiment of the present invention; and
fig. 6 is a schematic diagram of the frequency and voltage adjustment over time under different temperature conditions by the dynamic voltage frequency adjustment method according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of specific implementations of the present invention is provided in conjunction with specific embodiments:
the first embodiment is as follows:
fig. 1 is a schematic structural diagram of a dynamic voltage frequency adjustment system according to a first embodiment of the present invention, and for convenience of description, only the parts related to the first embodiment of the present invention are shown, which are detailed as follows:
as shown in fig. 1, a dynamic voltage frequency adjustment system 1 according to an embodiment of the present invention includes a DVFS control module 10, a clock reference source 11, a frequency deviation detector 12, a voltage generation module 13, and an oscillator 14, where the frequency deviation detector 12 is respectively connected to the DVFS control module 10, the clock reference source 11, the voltage generation module 13, and the oscillator 14, the voltage generation module 13 is respectively connected to the frequency deviation detector 12, the oscillator 14, and a digital circuit module, the oscillator 14 is respectively connected to the frequency deviation detector 12, the voltage generation module 13, and the digital circuit module, where the DVFS control module 10 is configured to send a frequency control word to the frequency deviation detector 12 according to a frequency modulation and voltage regulation request, the clock reference source 11 is configured to provide a reference clock to the frequency deviation detector 12, the frequency deviation detector 12 is configured to obtain a frequency deviation of a current operating clock of the digital circuit module according to the frequency control word and the reference clock, and sending the frequency deviation to a voltage generation module 13, where the voltage generation module 13 is configured to provide the same working voltage for an oscillator 14 and the digital circuit module, and adjust the current working voltage according to the frequency deviation, and the oscillator 14 is configured to provide a working clock for the digital circuit module, and adjust the current working clock of the digital circuit module according to the current working voltage.
In the embodiment of the present invention, the voltage generated by the voltage generation module (the operating voltage of the oscillator and the digital circuit module) varies according to the frequency deviation, and the voltage generation module may be a module inside the system or a module outside the system. The clock generated by the oscillator (the operating clock of the digital circuit block) varies according to the operating voltage, and the oscillator may be a voltage-controlled oscillator. The digital circuit block may be a Central Processing Unit (CPU), a Graphic Processing Unit (GPU), an Image Signal Processor (ISP), a video processing unit (VPP), etc.
As shown in fig. 2, in a specific implementation, when the DVFS control module 10 receives a fm/voltage regulation request, the DVFS control module 10 sends a frequency control word to the frequency deviation detector 12, and performs an adaptive voltage frequency regulation process until a preset condition is met, where the adaptive voltage frequency regulation process includes: the frequency deviation detector 12 obtains a frequency deviation of a current operating clock of the digital circuit module according to the frequency control word and a reference clock provided by the clock reference source 11, the voltage generation module 13 adaptively adjusts a current operating voltage of the digital circuit module and the oscillator 14 according to the frequency deviation, and the oscillator 14 adaptively adjusts the current operating clock of the digital circuit module according to the current operating voltage, wherein the preset condition is that the frequency deviation is zero. The voltage is adjusted in a self-adaptive mode according to the single frequency deviation in the whole adjusting process, the whole adjusting process is not controlled by complex time sequences, and the response speed only depends on the speed with stable clock frequency, so that the voltage frequency adjusting and controlling process is greatly simplified, and the response speed is improved. The frequency and voltage modulation request can be triggered by an external interrupt or a power consumption control management module, and the triggering condition of the frequency and voltage modulation request can be application scene switching or performance or power consumption optimization requirements.
It should be noted that the operating clock may be adjusted in a plurality of times with or without timing until the frequency deviation is zero, and accordingly, the operating voltage of the digital circuit module reaches an optimal value through the above adaptive adjustment process.
Preferably, the clock frequency generated by the oscillator is less than or equal to the highest operable frequency of the digital circuit module, so as to ensure that the digital circuit module operates normally.
Considering that the existing dynamic voltage frequency adjustment method is to set the corresponding voltage and frequency according to the built-in voltage-frequency upper limit relationship, the corresponding frequency upper limit may be different due to the PT (process/temperature) drift relationship even under the same voltage. Therefore, in general, enough margin is reserved in the voltage-frequency upper limit relation to deal with the influence of PT drift, and the performance/power consumption is substantially lost to a certain degree. Therefore, preferably, the direction and magnitude of the frequency change caused by the influence of PVT (process/voltage/temperature) on the oscillator and the digital circuit module are the same, and due to the characteristic that the oscillator and the digital circuit module are influenced by PVT and have consistent frequency offset, the influence caused by the process and temperature offset can be adaptively eliminated by dynamically adjusting the voltage, so that performance or power consumption margin does not need to be reserved for the digital circuit module, and the efficiency of the digital circuit module can be further improved.
The dynamic voltage frequency adjustment system provided by the embodiment of the invention comprises a DVFS control module, a clock reference source, a frequency deviation detector, a voltage generation module and an oscillator, wherein the DVFS control module is used for sending a frequency control word to the frequency deviation detector according to a frequency modulation and voltage regulation request, the clock reference source is used for providing a reference clock for the frequency deviation detector, the frequency deviation detector is used for obtaining the frequency deviation of the current working clock of a digital circuit module according to the frequency control word and the reference clock and sending the frequency deviation to the voltage generation module, the voltage generation module is used for providing the same working voltage for the oscillator and the digital circuit module and adjusting the current working voltage according to the frequency deviation, the oscillator is used for providing the working clock for the digital circuit module and adjusting the current working clock of the digital circuit module according to the current working voltage, thereby simplifying the voltage frequency adjustment control process and improving the response speed.
Example two:
fig. 3 shows an implementation flow of the dynamic voltage frequency adjustment method according to the second embodiment of the present invention, and for convenience of description, only the relevant parts related to the second embodiment of the present invention are shown, and the following details are described below:
in step S301, when receiving the fm-regulator request, the DVFS control module sends a frequency control word to the frequency deviation detector.
The dynamic voltage frequency adjustment method described in the embodiment of the present invention is based on the dynamic voltage frequency adjustment system described in the first embodiment, and the system includes a DVFS control module, a clock reference source, a frequency deviation detector, a voltage generation module, and an oscillator.
In the embodiment of the present invention, when the DVFS control module receives the fm/voltage regulation request, the DVFS control module sends a frequency control word to the frequency deviation detector. In a specific implementation, the fm/voltage regulation request may be triggered by an external interrupt or a power consumption control management module, a trigger condition of the fm/voltage regulation request may be application scene switching or performance or power consumption optimization requirements, when the DVFS control module receives the fm/voltage regulation request, the DVFS control module resets a clock frequency for the digital circuit module according to a current scene or performance or power consumption optimization requirements, determines a frequency control word according to the reset clock frequency, and sends the frequency control word to the frequency deviation detector.
In step S302, an adaptive voltage frequency adjustment process is performed until a preset condition is satisfied.
In an embodiment of the present invention, the adaptive voltage frequency adjustment process includes:
s3021, the frequency deviation detector obtains the frequency deviation of the current working clock of the digital circuit module according to the frequency control word and the reference clock provided by the clock reference source;
s3022, the voltage generation module adjusts the current working voltages of the digital circuit module and the oscillator according to the frequency deviation;
and S3023, adjusting the current working clock of the digital circuit module according to the current working voltage by the oscillator.
In the embodiment of the present invention, the preset condition is that the frequency deviation is zero, the frequency deviation detector may obtain a reset frequency according to the frequency control word and a reference clock provided by the clock reference source, calculate a frequency deviation between the current clock frequency and the reset clock frequency, and send the frequency deviation word to the voltage generation module, the voltage generation module adaptively adjusts a voltage generated by the voltage generation module according to the frequency deviation, the voltage generated by the voltage generation module is an operating voltage of the digital circuit module and the oscillator, in other words, the digital circuit module and the oscillator have the same operating voltage, accordingly, the oscillator adaptively adjusts a clock generated by the oscillator according to the voltage generated by the voltage generation module, the clock generated by the oscillator is an operating clock of the digital circuit module, and steps S3021 to S3023 are repeated until the frequency deviation is zero, the self-adaptive voltage frequency adjusting process is to perform self-adaptive adjustment on the voltage according to single frequency deviation, the whole adjusting process has no complex time sequence control, and the response speed only depends on the speed of stable clock frequency, so that the voltage frequency adjusting control process is greatly simplified, and the response speed is improved.
It should be noted that the operating clock may be adjusted in a plurality of times with or without timing until the frequency deviation is zero, and accordingly, the operating voltage of the digital circuit module reaches an optimal value through the above adaptive adjustment process.
Preferably, the clock frequency generated by the oscillator is less than or equal to the highest operable frequency of the digital circuit module, so as to ensure that the digital circuit module operates normally.
Considering that the existing dynamic voltage frequency adjustment method is to set the corresponding voltage and frequency according to the built-in voltage-frequency upper limit relationship, the corresponding frequency upper limit may be different due to the PT (process/temperature) drift relationship even under the same voltage. Therefore, in general, enough margin is reserved in the voltage-frequency upper limit relation to deal with the influence of PT drift, and the performance/power consumption is substantially lost to a certain degree. Therefore, preferably, the direction and magnitude of the frequency change caused by the influence of PVT (process/voltage/temperature) on the oscillator and the digital circuit module are the same, and due to the characteristic that the oscillator and the digital circuit module are influenced by PVT and have consistent frequency offset, the influence caused by the process and temperature offset can be eliminated in a self-adaptive manner by dynamically adjusting the voltage, so that performance or power consumption allowance does not need to be reserved for the digital circuit module, and the efficiency of the digital circuit module can be further improved.
Fig. 4 shows a situation that the frequency and voltage adjustment varies with time under different temperature and process deviations in the conventional dynamic voltage and frequency adjustment method, which cannot adaptively adjust the voltage (in other words, has the same voltage) based on different temperature and process deviations, and when the voltage and frequency need to be decreased, the frequency needs to be decreased first, and when the voltage and frequency need to be increased, the voltage needs to be increased first, and then the frequency needs to be increased, and the adjustment timing is complicated; fig. 5 shows the frequency and voltage adjustment of the dynamic voltage frequency adjustment method according to the present embodiment with time variation under different process deviations (slow process corner, typical process corner, fast process corner); fig. 6 shows the dynamic voltage frequency adjustment method of the present embodiment, in which the frequency and the voltage change with time at different temperatures (higher temperature, normal temperature, and lower temperature). As can be seen from fig. 4 to 6, the dynamic voltage frequency adjustment method described in this embodiment is simpler in adjustment timing and faster in response speed compared to the conventional dynamic voltage frequency adjustment method, and can adaptively adjust the voltage based on different processes and temperatures, thereby further optimizing performance and power consumption compared to the conventional dynamic voltage frequency adjustment method.
In the embodiment of the invention, when a frequency modulation and voltage regulation request is received, the DVFS control module sends a frequency control word to a frequency deviation detector, the frequency deviation detector acquires the frequency deviation of the current working clock of the digital circuit module according to the frequency control word and a reference clock provided by a clock reference source, a voltage generation module adjusts the current working voltages of the digital circuit module and an oscillator according to the frequency deviation, and the oscillator adjusts the current working clock of the digital circuit module according to the current working voltage until the frequency deviation is zero, so that the voltage frequency adjustment control process is simplified, and the response speed is improved.
Example three:
the embodiment of the invention provides electronic equipment, which comprises the dynamic voltage frequency adjusting system described in the first embodiment.
In an embodiment of the present invention, a dynamic voltage frequency adjustment system includes a DVFS control module, a clock reference source, a frequency deviation detector, a voltage generation module, and an oscillator, the DVFS control module is configured to send a frequency control word to the frequency deviation detector according to a frequency modulation and voltage regulation request, the clock reference source is configured to provide a reference clock to the frequency deviation detector, the frequency deviation detector is configured to obtain a frequency deviation of a current operating clock of a digital circuit module according to the frequency control word and the reference clock and send the frequency deviation to the voltage generation module, the voltage generation module is configured to provide the same operating voltage to the oscillator and the digital circuit module and adjust the current operating voltage according to the frequency deviation, the oscillator is configured to provide the operating clock to the digital circuit module and adjust the current operating clock of the digital circuit module according to the current operating voltage, thereby simplifying the voltage frequency adjustment control process and improving the response speed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114489234A (en) * | 2021-12-31 | 2022-05-13 | 珠海亿智电子科技有限公司 | Dynamic voltage frequency adjustment system, method and chip |
| CN119292755A (en) * | 2024-12-13 | 2025-01-10 | 太初(无锡)电子科技有限公司 | A chip temperature dynamic control system and chip |
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| US20040090216A1 (en) * | 2002-11-07 | 2004-05-13 | International Business Machines Corporation | Method and apparatus for control of voltage regulation |
| US20040130357A1 (en) * | 2002-07-26 | 2004-07-08 | Sterling Smith | Logic system with adaptive supply voltage control |
| DE102016217656A1 (en) * | 2015-09-16 | 2017-03-16 | Nvidia Corporation | Integrated voltage regulator with built-in process, temperature and aging compensation |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040130357A1 (en) * | 2002-07-26 | 2004-07-08 | Sterling Smith | Logic system with adaptive supply voltage control |
| US20040090216A1 (en) * | 2002-11-07 | 2004-05-13 | International Business Machines Corporation | Method and apparatus for control of voltage regulation |
| DE102016217656A1 (en) * | 2015-09-16 | 2017-03-16 | Nvidia Corporation | Integrated voltage regulator with built-in process, temperature and aging compensation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114489234A (en) * | 2021-12-31 | 2022-05-13 | 珠海亿智电子科技有限公司 | Dynamic voltage frequency adjustment system, method and chip |
| CN119292755A (en) * | 2024-12-13 | 2025-01-10 | 太初(无锡)电子科技有限公司 | A chip temperature dynamic control system and chip |
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Application publication date: 20210416 |