Storage device and throttling operation method thereof

Patent metadata

Field	Value
Publication number	US-2024184679-A1
Application number	US-202318325130-A
Country	US
Kind code	A1
Filing date	May 30, 2023
Priority date	Dec 2, 2022
Publication date	Jun 6, 2024
Grant date	—

Abstract

The present disclosure relates to an operation method of a storage device, which is for overcoming the instability of the storage device caused by throttling cancellation. An operation method of a memory controller may include: acquiring a temperature of a memory; determining, on the basis of the temperature of the memory, to start a throttling operation that reduces performance of the memory; determining whether the throttling operation is cancelled; and recovering the throttling operation, which alleviates instability of the memory caused by the throttling cancellation.

First claim

What is claimed is:

1 . An operation method of a memory controller, the method comprising:
acquiring a temperature of a memory; determining, on the basis of the temperature of the memory, to start a throttling operation that reduces performance of the memory; determining whether the throttling operation is cancelled; and performing a throttling recovery operation, which alleviates instability of the memory caused by cancelling the throttling operation.

2 . The operation method of claim 1 ,
wherein the determining whether the throttling operation is cancelled comprises detecting a first temperature at which the throttling operation is frequently cancelled, and wherein the performing the throttling recovery operation comprises setting a temperature condition for the determining to start the throttling operation to be lower than the first temperature by a predetermined temperature.

3 . The operation method of claim 2 , wherein the detecting the first temperature comprises detecting, as the first temperature, a currently set temperature condition for the determining to start the throttling operation when a ratio of a value of a throttling cancellation counter, which is increased by 1 each time the throttling operation is cancelled before the throttling operation is started after the determining to start the throttling operation, to a value of a throttling counter, which is increased by 1 each time of the determining to start the throttling operation is larger than a predetermined value.

4 . The operation method of claim 2 , wherein the detecting the first temperature comprises detecting the first temperature on the basis of statistical values of the temperatures of the memory acquired at a plurality of points of time when the throttling operation is cancelled.

5 . The operation method of claim 1 ,
wherein the determining whether the throttling operation is cancelled comprises increasing a throttling cancellation counter by 1 when the throttling operation is cancelled, and wherein the performing the throttling recovery operation comprises: resetting a storage device including the memory and the memory controller when the value of the throttling cancellation counter is greater than or equal to a predetermined value; and initializing the value of the throttling cancellation counter to 0.

6 . The operation method of claim 5 , wherein the performing the throttling recovery operation further comprises transmitting, to a first outside, information indicating that the memory and the memory controller are to be reset.

7 . The operation method of claim 5 , wherein the resetting comprises resetting the storage device during an idle state where there is no command from the first outside or during a hibernation operation.

8 . The operation method of claim 1 ,
wherein the determining whether the throttling operation is cancelled comprises determining that an overload has occurred when a ratio of a value of a throttling cancellation counter, which is increased by 1 each time the throttling operation is cancelled before the throttling operation is started after the determining to start the throttling operation, to a value of a throttling counter, which is increased by 1 each time of the determining to start the throttling operation is larger than a predetermined value, and wherein the performing the throttling recovery operation comprises turning off, when determining that the overload has occurred, operations of a write booster and a host performance booster (HPB) for improving performance of a storage device including the memory and the memory controller.

9 . The operation method of claim 1 ,
wherein the determining whether the throttling operation is cancelled comprises determining whether a ratio of a value of a throttling cancellation counter, which is increased by 1 each time the throttling operation is cancelled before the throttling operation is started after the determining to start the throttling operation, to a value of a throttling counter, which is increased by 1 each time of the determining to start the throttling operation is larger than a predetermined value, and wherein the performing the throttling recovery operation comprises setting, when the ratio is greater than the predetermined value, the throttling operation to be started after a predetermined delay time after the determining to start the throttling operation.

10 . The operation method of claim 9 , wherein the delay time increases in proportion to a number of times the throttling operation is cancelled.

11 . The operation method of claim 1 ,
wherein the determining whether the throttling operation is cancelled comprises determining whether the throttling operation is cancelled by a reset operation, and wherein the performing the throttling recovery operation comprises: storing, in the memory, information indicating that the throttling operation is cancelled by the reset operation when it is determined that the throttling operation is cancelled by the reset operation; determining, on the basis of the information when booting of a storage device is performed after the reset operation, whether the throttling operation is cancelled by the reset operation; and performing, when it is determined that the throttling operation is cancelled by the reset operation, the booting in a safety recovery mode in which the memory is operated at an operating frequency lower than a normal mode.

12 . A memory controller comprising:
a temperature acquirer configured to acquire a temperature of a memory; a throttling counter configured to increase by 1 each time a determination to start a throttling operation that reduces performance of the memory is made; a throttling cancellation counter configured to increase by 1 each time the throttling operation is cancelled; and a manager configured to determine to start the throttling operation and control performing a throttling recovery operation that alleviates instability of the memory caused by cancelling the throttling operation on the basis of the temperature of the memory, a value of the throttling counter, and a value of the throttling cancellation counter.

13 . The memory controller of claim 12 , wherein the manager is further configured to:
detect a first temperature at which the throttling operation is frequently cancelled, and set a temperature condition for the determination to start the throttling operation to be lower than the first temperature by a predetermined temperature.

14 . The memory controller of claim 13 ,
wherein the manager detects, as the first temperature, a currently set temperature condition for the determination to start the throttling operation when a ratio of the value of the throttling cancellation counter to the value of the throttling counter is greater than a predetermined value, or wherein the manager detects the first temperature on the basis of statistical values of the temperatures of the memory acquired by the temperature acquirer at a plurality of points of time when the throttling cancellation counter is increased by 1.

15 . The memory controller of claim 12 , wherein the manager is further configured to control a storage device including the memory and the memory controller to be reset when the value of the throttling cancellation counter is greater than or equal to a predetermined value.

16 . The memory controller of claim 12 , wherein the manager is further configured to:
control a storage device including the memory and the memory controller to be reset when the value of the throttling cancellation counter is g

Assignees

• Sk Hynix Inc

Inventors

• Jang In Jong

Classifications

• G01K1/02

  Means for indicating or recording specially adapted for thermometers · CPC title

• G06F3/0611

  in relation to response time · CPC title

• G06F3/0659

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0604

  Improving or facilitating administration, e.g. storage management · CPC title

• G06F3/0653

  Monitoring storage devices or systems · CPC title