Low-latency processing for unmap commands

Patent metadata

Field	Value
Publication number	US-12572304-B2
Application number	US-202217758332-A
Country	US
Kind code	B2
Filing date	Mar 17, 2022
Priority date	Mar 17, 2022
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

Methods, systems, and devices for low-latency processing for unmap commands are described. A plurality of commands including one or more unmap commands and one or more other types of commands may be received from a device. The one or more unmap commands may be stored in a queue used for unmap commands and the other commands may be stored in another queue. Ready-to-transfer messages for the one or more unmap commands stored in the queue may be transmitted to the device. In response to the ready-to-transfer messages, one or more messages including data for executing the one or more unmap commands may be received and stored in a portion of a buffer used for unmap commands.

First claim

What is claimed is:

1 . A memory system, comprising:
one or more memory devices; and processing circuitry coupled with the one or more memory devices and configured to cause the memory system to:
receive a plurality of commands comprising a plurality of unmap commands interspersed with one or more second commands of a type different than the plurality of unmap commands;
store the plurality of unmap commands in a first queue used for unmap commands and the one or more second commands in a second queue used for the one or more second commands;
transmit a plurality of ready-to-transfer messages consecutively, the plurality of ready-to-transfer messages comprising a ready-to-transfer message for each unmap command of the plurality of unmap commands in the first queue;
receive, in response to the plurality of ready-to-transfer messages, one or more messages comprising data for executing the plurality of unmap commands; and
store, in at least a portion of a buffer used for unmap commands, the data for executing the plurality of unmap commands obtained from the one or more messages.

2 . The memory system of claim 1 , wherein the processing circuitry is further configured to cause the memory system to:
transmit a second plurality of ready-to-transfer messages comprising a ready-to-transfer message for each second command of the one or more second commands, wherein a first order in which unmap commands of the plurality of unmap commands and second commands of the one or more second commands are received is different than a second order in which corresponding ready-to-transfer messages of the plurality of ready-to-transfer messages for the plurality of unmap commands and the second plurality of ready-to-transfer messages for the one or more second commands are transmitted.

3 . The memory system of claim 2 , wherein, to transmit the plurality of ready-to-transfer messages for the plurality of unmap commands, the processing circuitry is further configured to cause the memory system to:
transmit the plurality of ready-to-transfer messages for the plurality of unmap commands before the second plurality of ready-to-transfer messages for the one or more second commands.

4 . The memory system of claim 1 , wherein the one or more messages comprises a single message comprising the data corresponding to the plurality of ready-to-transfer messages.

5 . The memory system of claim 1 , wherein the one or more messages comprises a plurality of messages comprising the data in a plurality of data packets, the plurality of messages corresponding to the plurality of ready-to-transfer messages.

6 . The memory system of claim 1 , wherein multiple ready-to-transfer messages of the plurality of ready-to-transfer messages are transmitted prior to receiving a message of the one or more messages.

7 . The memory system of claim 1 , wherein the processing circuitry is further configured to cause the memory system to:
determine that a quantity of unmap commands in the first queue satisfies a threshold, wherein the plurality of ready-to-transfer messages for the plurality of unmap commands is transmitted based at least in part on the quantity of unmap commands satisfying the threshold.

8 . The memory system of claim 1 , wherein the processing circuitry is further configured to cause the memory system to:
determine that the plurality of unmap commands has been stored in the first queue for a threshold duration, wherein the plurality of ready-to-transfer messages for the plurality of unmap commands is transmitted based at least in part on one or more unmap commands of the plurality of unmap commands being stored in the first queue for the threshold duration.

9 . The memory system of claim 1 , wherein the processing circuitry is further configured to cause the memory system to:
identify, based at least in part on receiving the plurality of commands, the plurality of unmap commands within the plurality of commands, wherein the plurality of unmap commands is stored in the first queue based at least in part on identifying the plurality of unmap commands.

10 . The memory system of claim 1 , wherein the one or more messages comprise one or more DATA OUT universal flash storage protocol information units (UPIUs).

11 . A non-transitory, computer-readable medium storing code comprising instructions which, when executed by processing circuitry of an electronic device, causes the electronic device to:
receive a plurality of commands comprising a plurality of unmap commands interspersed with one or more second commands of a type different than the plurality of unmap commands; store the plurality of unmap commands in a first queue used for unmap commands and the one or more second commands in a second queue used for the one or more second commands; transmit a plurality of ready-to-transfer messages consecutively, the plurality of ready-to-transfer messages comprising a ready-to-transfer message for each unmap command of the plurality of unmap commands in the first queue; receive, in response to the plurality of ready-to-transfer messages, one or more messages comprising data for executing the plurality of unmap commands; and store, in at least a portion of a buffer used for unmap commands, the data for executing the plurality of unmap commands obtained from the one or more messages.

12 . The non-transitory, computer-readable medium of claim 11 , wherein the instructions, when executed by the processing circuitry of the electronic device, further cause the electronic device to:
transmit a second plurality of ready-to-transfer messages comprising a ready-to-transfer message for each second command of the one or more second commands, wherein a first order in which unmap commands of the plurality of unmap commands and second commands the one or more second commands are received is different than a second order in which corresponding ready-to-transfer messages of the plurality of ready-to-transfer messages for the plurality of unmap commands and the second plurality of ready-to-transfer messages for the one or more second commands are transmitted.

13 . The non-transitory, computer-readable medium of claim 11 , wherein the instructions, when executed by the processing circuitry of the electronic device, further cause the electronic device to:
determine that a quantity of unmap commands in the first queue satisfies a threshold, wherein the plurality of ready-to-transfer messages for the plurality of unmap commands is transmitted based at least in part on the quantity of unmap commands satisfying the threshold.

14 . The non-transitory, computer-readable medium of claim 11 , wherein the instructions, when executed by the processing circuitry of the electronic device, further cause the electronic device to:
determine that the plurality of unmap commands has been stored in the first queue for a threshold duration, wherein the plurality of ready-to-transfer messages for the plurality of unmap commands is transmitted based at least in part on one or more unmap commands of the plurality of unmap commands being stored in the first queue for the threshold duration.

15 . The non-transitory, computer-readable medium of claim 12 , wherein the instructions to transmit the plurality of ready-to-transfer messages for the plurality of unmap commands, when executed by the processing circuitry of the electronic device, cause the electronic device to:
transmit the plurality of ready-to-transfer messages for the plurality of unmap commands before the second plurality of ready-to-transfer messages for the one or more second commands.

Assignees

• Micron Technology Inc

Inventors

• Zhu Na
• Shi Ling
• Sun Bo
• Li Huachen
• Wang Qingyuan

Classifications

• G06F2212/7207

  management of metadata or control data · CPC title

• G06F3/0683 Primary

  Plurality of storage devices · CPC title

• G06F3/0656

  Data buffering arrangements · CPC title

• G06F3/0611

  in relation to response time · CPC title

• G06F3/061

  Improving I/O performance · CPC title