CN102981591A - Method and system capable of reducing power consumption of computer system in sleep mode - Google Patents

Abstract

The invention relates to a method for reducing power consumption of a computer system in a sleep mode and a related computer system. Before a computer system enters a sleep mode from a normal mode, a state data is written into a memory in the computer system. After entering the sleep mode, a first output voltage is provided to the memory and power supply to other components in the computer system is stopped. And before returning to the normal mode from the sleep mode, supplying a second output voltage to the memory, wherein the value of the first output voltage is smaller than that of the second output voltage. The power consumption in the sleep mode can be further reduced, and the sleep standby time can be prolonged.

Description

Method and system capable of reducing power consumption of computer system in sleep mode

technical field

The invention relates to a method for reducing power consumption of a computer system and a related computer system, especially to a method for reducing power consumption of a computer system in sleep mode and a related computer system.

Background technique

Advanced Configuration and Power Interface (ACPI) is a computer power management specification jointly developed by manufacturers such as Intel, Microsoft, Phoenix, HP, and Toshiba. The purpose is to allow the operating system to directly manage the use of power by various devices. situation.

Under the current ACPI architecture, different states and power modes of the computer system are defined: the normal working state G0 includes the S0 mode, the sleep state G1 includes the S1-S4 modes, and the power-on state G2 includes the S5 mode. The following is a brief description of the power supply of the main components in the computer system in the S0~S5 mode:

S0 mode: The operating system and application programs of the computer system are running, and power is continuously supplied to all components;

S1 mode: the central processing unit (central processing unit, CPU) stops executing instructions, but continues to supply power to the CPU and other components;

S2 mode: Stop supplying power to the CPU, but continue to supply power to other components;

S3 mode: only continuously supplies power to the memory, but stops supplying power to other components;

S4 mode: Write the memory data into the hard disk, stop supplying power to all components;

S5 Mode: Completely shut down all components.

S3 mode can also be called STR (Suspend to RAM) mode, which is called standby state (stand-by) in Microsoft XP or Linux operating system, and called sleep state (sleep) in Microsoft Vista or Mac OS X operating system . In the S3 mode, the computer system will load the temporary data into the memory, and stop the parts other than the memory. Therefore, if the user does not need to use it temporarily, the computer system can enter the S3 mode to save power consumption, and it can also quickly and immediately restore the computer state when it needs to be used.

In the prior art, in the computer system under the ACPI architecture, there is no power-saving design for the S3 mode, and the power supply of the memory is not optimized, so unnecessary energy consumption may still be caused.

Contents of the invention

The present invention provides a method for reducing power consumption when a computer system operates in a sleep mode, which includes writing a data into a memory in the computer system before entering the sleep mode from a normal mode; After the sleep mode, supplying power to the memory with a first output voltage, and stopping power supply to other components in the computer system; and before entering the normal mode from the sleep mode, supplying power to the memory with a second output voltage, wherein The value of the first output voltage is smaller than the value of the second output voltage.

The present invention also provides a computer system capable of reducing power consumption in a sleep mode, which includes a memory; a central processing unit, used to write a data into the memory before entering the sleep mode from a normal mode; power supply; and a microprocessor, which is used to adjust the power supply to supply a first output voltage to the memory in the sleep mode, and a second output voltage before returning to the normal mode from the sleep mode A voltage is supplied to the memory, wherein the value of the first output voltage is less than the value of the second output voltage.

In the present invention, the memory only needs a small self-refresh current to maintain data in the sleep mode, and the power supply only supplies power to the memory through the minimum voltage required to perform self-refresh, which can further reduce power consumption in the sleep mode , so as to improve the sleep standby time.

Description of drawings

FIG. 1 is a schematic diagram of a low energy consumption computer system in the present invention.

Fig. 2 is a flowchart of the operation of the computer system of the present invention.

in

10-CPU 20-Power Supply 30-Memory

40-microprocessor 100-computer system

Detailed ways

FIG. 1 is a schematic diagram of a low power consumption computer system 100 in the present invention. The computer system 100 includes a CPU 10, a power supply 20, a memory 30, and a microprocessor 40, which can be switched between a normal mode and a sleep mode.

FIG. 2 is a flowchart of the operation of the computer system 100 of the present invention, which includes the following steps:

Step 210 : Provide power to all components in the computer system 100 to operate in the normal mode, go to step 220 .

Step 220: Determine whether to enter the sleep mode: if yes, execute step 230; if not, execute step 210.

Step 230: Write the data into the memory 30, go to step 240.

Step 240 : Supply a first output voltage to the memory 30 , and stop supplying power to other components in the computer system 100 to enter the sleep mode, go to step 250 .

Step 250: Determine whether to leave the sleep mode: if yes, execute step 260; if not, execute step 240.

Step 260 : Supply a second output voltage to the memory 30 , go to step 210 .

In the embodiment of the present invention, the normal mode can be the S0 mode of ACPI, that is, the power supply 20 supplies power to all components in the computer system 100 in step 210 . At this time, the CPU 10 and the memory 30 can transmit through the data bus, and then execute the operating system and the application program.

In an embodiment of the present invention, the sleep mode can be the S3 mode of ACPI. If it is judged in step 220 that it needs to enter the sleep mode, then the CPU 10 will involve the operating system, all application programs, and opened files in step 230. The status and other data are written into the memory 30, so that when returning to the normal mode later, the computer system 100 can quickly return to the initial state before entering the sleep mode.

In step 240, the CPU 10 will be shut down after starting the microprocessor 40, and stop supplying power to other components in the computer system 100 to enter the sleep mode. In the sleep mode, the microprocessor 40 adjusts the power supply 20 to provide the first output voltage to the memory 30 . If it is determined in step 250 that the sleep mode needs to be exited, the microprocessor 40 adjusts the power supply 20 to provide the second output voltage to the memory 30 .

In an embodiment of the present invention, the memory 30 can be a non-permanent memory (volatile memory), such as a dynamic random access memory (Dynamic Random Access Memory, DRAM), the main principle of action is to use the amount of charge stored in the capacitor to Represents whether a binary bit is 1 or 0. In practical applications, capacitors will inevitably have leakage. In order to prevent the charge leakage from affecting the integrity of the data, the memory 30 must perform a self-refresh charging operation periodically.

The microprocessor 40 can be a low-power voltage adjustment circuit, such as using resistor divider to adjust the output voltage of the power supply 20 . In the present invention, the value of the first output voltage is within the normal operating range of the memory 30 in the sleep mode, and the second output voltage is the normal output voltage of the power supply 20 . Since the memory 30 only needs a small self-refresh current to maintain data in the sleep mode, the value of the first output voltage is smaller than the second output voltage.

In the present invention, after entering the sleep mode, the power supply 20 only supplies power to the memory 30 through the minimum voltage required to perform self-refresh, and then supplies power to the memory 30 with a normal output voltage before leaving the sleep mode, so that the sleep mode can be further reduced. Lower power consumption, in order to improve sleep standby time.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (10)

1. the method for a power consumption can reduce a computer system and under a sleep pattern, move the time, its step comprises:

Before entering this sleep pattern from a normal mode, a data is write a storer in this computer system;

After entering this sleep pattern, one first output voltage is powered to this storer, and stop power supply to other assembly in this computer system;

And before entering this normal mode from this sleep pattern, one second output voltage is powered to this storer, wherein the value of this first output voltage is less than the value of this second output voltage.

2. the method for claim 1 is characterized in that, also be included in enter this normal mode after, continued power is given all component in this computer system.

3. the method for claim 1 is characterized in that, but also comprises the value that decides this first output voltage according to the operating voltage range of this storer when the charging of carrying out a self-refreshing is moved.

4. the method for claim 1 is characterized in that, but also comprises the value that decides this first output voltage according to this reservoir required minimum operating voltage when the charging of carrying out a self-refreshing is moved.

5. the method for claim 1 is characterized in that, this normal mode is the S0 pattern under an ACPI (ACPI) framework, and this sleep pattern is the S3 pattern under this ACPI framework.

6. the method for claim 1 is characterized in that, judging whether needs to enter this sleep pattern from this normal mode, or enters this normal mode from this sleep pattern.

7. the method for claim 1 is characterized in that, this data relates under this normal mode the be unlocked state of archives of an operating system, an application program or in this computer system.

8. computer system that can reduce power consumption under the sleep pattern, it comprises:

One storer:

One CPU (central processing unit) is used for before entering this sleep pattern from a normal mode data being write this storer:

One power supply supply; And

One microprocessor, being used for adjusting this power supply supply powers one first output voltage to this storer it under this sleep pattern, and before getting back to this normal mode from this sleep pattern, one second output voltage is powered to this storer, wherein the value of this first output voltage is less than the value of this second output voltage.

9. computer system as claimed in claim 8 is characterized in that, this microprocessor is controlled this power supply supply and made it stop power supply to this CPU (central processing unit) in order to after entering this sleep pattern.

10. computer system as claimed in claim 9 is characterized in that, adopts an ACPI framework, and this normal mode is the S0 pattern under this ACPI framework, and this sleep pattern is the S3 pattern under this ACPI framework.

Images