WO2022001138A1 - Procédé, système et appareil de réinitialisation de contrôleur de disque de type dss, et support de stockage lisible - Google Patents

Procédé, système et appareil de réinitialisation de contrôleur de disque de type dss, et support de stockage lisible Download PDF

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Publication number
WO2022001138A1
WO2022001138A1 PCT/CN2021/077023 CN2021077023W WO2022001138A1 WO 2022001138 A1 WO2022001138 A1 WO 2022001138A1 CN 2021077023 W CN2021077023 W CN 2021077023W WO 2022001138 A1 WO2022001138 A1 WO 2022001138A1
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Prior art keywords
queue
feature code
module
request
disk controller
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PCT/CN2021/077023
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English (en)
Chinese (zh)
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刘国华
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广东浪潮智慧计算技术有限公司
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Publication of WO2022001138A1 publication Critical patent/WO2022001138A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/061—Improving I/O performance
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/24—Resetting means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0659—Command handling arrangements, e.g. command buffers, queues, command scheduling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • the present invention relates to the field of computer technology, and in particular, to a method, system, device and computer-readable storage medium for resetting an SSD disk controller.
  • SSDs Solid-state drives
  • SSD has a variety of interface forms, among which SSD based on PCIe bus (PCIe, peripheral component interconnect express, high-speed serial computer expansion bus standard) NVMe protocol interface (NVMe, Non-Volatile Memory express, NVMe storage system) SSD has more Low latency, higher bandwidth, and higher random read and write IOPS (Input/Output Operations Per Second, the number of read and write operations per second) occupy an important position in the market.
  • PCIe peripheral component interconnect express
  • NVMe protocol interface NVMe, Non-Volatile Memory express, NVMe storage system
  • IOPS Input/Output Operations Per Second, the number of read and write operations per second
  • the SSD disk using the NVMe protocol interface provides an interface for controller reset according to the protocol:
  • the Host can trigger the disk to do the controller reset process by configuring the disk control register. After the disk receives the reset request sent by the Host, it will Stop the current service and perform the action of deleting the queue. After completing these processes, the Host is notified of the reset completion information through the status register.
  • the controller reset is more common in abnormal scenarios, such as the scenario in which the IO (Input/Output, input/output) in the SSD is overtime: the Host will abort the overtime IO when it detects an IO timeout. After failure, the process of queue deletion and controller reset will be performed.
  • the SSD disk is divided into front-end protocol interface module and back-end business module.
  • IO timeout usually means that some kind of abnormality has occurred in the back-end business module.
  • the front-end protocol module After receiving the queue deletion request, the front-end protocol module usually needs to wait and confirm. The subsequent process of queue deletion can be completed only after the IO resources of the terminal have been released.
  • the purpose of the present invention is to provide a method, system, device and computer-readable storage medium for resetting an SSD disk controller, which are more reliable and effective. Its specific plan is as follows:
  • a method for resetting an SSD disk controller, applied to a front-end protocol interface module includes:
  • the IO is discarded.
  • the method further includes:
  • the queue creation instruction create the IO queue and the feature code of the IO queue
  • the feature code is formulated according to the queue ID of the IO queue, the CPU tick count information and the current power-on times of the SSD device.
  • the process of writing the feature code into the IO request includes:
  • the process of judging whether there is an IO queue corresponding to the feature code carried by the IO includes:
  • the corresponding IO queue is deleted directly according to the queue deletion instruction.
  • the invention also discloses an SSD disk controller reset system, which is applied to the front-end protocol interface module, including:
  • the IO receiving module is used to receive the IO sent by the back-end business module
  • a feature code judgment module for judging whether there is an IO queue corresponding to the feature code carried by the IO;
  • the IO discarding module is configured to discard the IO if the feature code judging module determines that the IO queue does not exist.
  • the instruction receiving module is used to receive the queue creation instruction of the Host
  • a queue creation module for creating the IO queue and the feature code of the IO queue according to the queue creation instruction
  • the IO request receiving module is used to receive the IO request sent by the Host;
  • a feature code writing module for writing the feature code into the IO request
  • An IO request sending module configured to send the IO request with the feature code to the back-end business module through the IO queue.
  • the invention also discloses an SSD disk controller reset device, comprising:
  • the processor is configured to execute the computer program to implement the foregoing method for resetting the SSD disk controller.
  • the present invention also discloses a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the foregoing method for resetting an SSD disk controller is implemented.
  • the SSD disk controller reset method is applied to the front-end protocol interface module, including: receiving the IO sent by the back-end service module; judging whether there is an IO queue corresponding to the feature code carried by the IO; if not, discarding IO.
  • the present invention uses the feature code in the IO to judge whether there is an IO queue corresponding to the IO, and according to whether the IO queue exists, it is judged whether the IO is a timeout IO and whether it can be sent to the Host side. Before the module releases all IOs, it can also delete the IO queue for reset operation, instead of sending IOs to the host in the primary selection timeout, which improves the reset speed and reliability.
  • FIG. 1 is a schematic flowchart of a method for resetting an SSD disk controller disclosed in an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of another method for resetting an SSD disk controller disclosed in an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a reset system for an SSD disk controller disclosed in an embodiment of the present invention.
  • An embodiment of the present invention discloses a method for resetting an SSD disk controller. Referring to FIG. 1, the method is applied to a front-end protocol interface module. The method includes:
  • the back-end business module will return the corresponding IO, for example, the data required by the IO request or according to The response information after the IO request processing is completed. Therefore, the front-end protocol interface module will receive the IO sent by the back-end business module.
  • the Host side may be an operating system that directly interacts with the user.
  • the back-end service module may have a timeout phenomenon, so there will be IO accumulation. At this time, the back-end service module may send the time-out IO to the front-end protocol interface module. , in order to directly delete the IO queue for reset when the SSD disk controller is reset, to avoid waiting too long for the back-end business module to release IO, and the IO that takes too long to reset fails and times out passes the front-end protocol interface module from the back-end business When the module is sent to the Host, it is necessary to determine whether there is an IO queue corresponding to the feature code carried by the IO.
  • an IO request corresponds to an IO queue.
  • the IO returned by the back-end business module according to the IO request will also use the same IO queue used when the IO request is sent to the back-end business module;
  • the IO queue corresponding to the IO may have been deleted due to the reset operation.
  • the back-end business The time-out IO returned by the module will not have a corresponding IO queue, and can only be sent to the front-end protocol interface module through the IO queue created to process other IO requests. Therefore, by judging the characteristics of the IO corresponding to the IO queue code, you can know whether the IO is a timeout IO and whether it should be discarded.
  • the feature code is the identification information corresponding to the IO queue when the IO queue is created according to the IO request.
  • Each IO queue has a unique feature code. Therefore, the corresponding IO queue can be found through the feature code.
  • the corresponding IO queue cannot be found by using the feature code in the current IO, it means that the IO queue corresponding to the current IO has been deleted, indicating that the current IO is a timeout IO and should not be sent to the Host side, but directly in the front-end protocol interface module. Abandoning IO avoids the situation that IO will be sent to the host over time after the IO queue is deleted, which provides a prerequisite for the rapid reset of the SSD disk controller.
  • IO queue corresponding to the feature code it means that the IO currently has an IO queue corresponding to the threshold, and no reset operation is currently performed.
  • the IO is valid, and the IO can be sent to the Host to complete the entire IO request.
  • the embodiment of the present invention uses the feature code in the IO to determine whether there is an IO queue corresponding to the IO, and according to whether the IO queue exists, it is determined whether the IO is a timeout IO and whether it can be sent to the Host side. Before waiting for the back-end business module to release all IOs, the IO queue can also be deleted for the reset operation, instead of sending the IOs to the host in the primary selection timeout, which improves the reset speed and reliability.
  • the embodiment of the present invention discloses a specific SSD disk controller reset method, which is applied to the front-end protocol interface module. Compared with the previous embodiment, this embodiment further describes and optimizes the technical solution. See Figure 2, specifically:
  • the Host Before sending an IO request, the Host needs to allocate a corresponding IO queue for the IO request. Therefore, it will send the corresponding queue creation command to the front-end protocol interface module to create a new IO queue for subsequent IO requests.
  • S202 Create an IO queue and a feature code of the IO queue according to the queue creation instruction.
  • a corresponding feature code is created for the IO queue at the same time.
  • CPU clock, CPU, central processing unit, central processing unit and the current power-on times of the SSD device to obtain a unique feature code.
  • the feature code can be written into the IO request, and the relationship between the IO request and the IO can be confirmed through the context information. To this end, the feature code can be written into the IO request. In this way, the feature code can be obtained while using the context to determine the relationship between IO and IO request.
  • S205 Send the IO request with the feature code to the back-end business module through the IO queue.
  • the IO request is sent to the back-end business module through the IO queue corresponding to the feature code.
  • the context information in the IO generated by the back-end business module also has the same feature code according to the context information in the IO request. Therefore, after receiving the IO sent by the back-end business module, the IO can be obtained from the IO context information. feature code for subsequent judgment.
  • the queue deletion instruction may be a reset instruction or an instruction used to delete a queue alone.
  • the front-end protocol interface module does not need to wait for the back-end business module to release the IO, and can directly delete the corresponding IO queue after receiving the queue deletion instruction.
  • the reset of the SSD disk controller is completed, the reset efficiency is improved, and the reliability is improved without being affected by the back-end service modules.
  • the back-end business module when the back-end business module is reset, it can release the IO according to the preset reset method by itself. Even if the release fails and the IO is blocked, it will not affect the deletion of the IO queue.
  • S210 can be executed at any time. Even if there is no IO queue currently, the queue deletion instruction can be received and executed. Of course, there is no change before and after execution. Therefore, S210 is not executed in a clear order relative to S201 to S209. The order is not limited here.
  • an embodiment of the present invention also discloses a system for resetting an SSD disk controller, as shown in FIG. 3 , which is applied to a front-end protocol interface module, including:
  • the IO receiving module 11 is used to receive the IO sent by the back-end business module;
  • the feature code judgment module 12 is used to judge whether there is an IO queue corresponding to the feature code carried by the IO;
  • the IO discarding module 13 is configured to discard the IO if the feature code determination module 12 determines that the IO queue does not exist.
  • the embodiment of the present invention uses the feature code in the IO to determine whether there is an IO queue corresponding to the IO, and according to whether the IO queue exists, it is determined whether the IO is a timeout IO and whether it can be sent to the Host side. Before waiting for the back-end business module to release all IOs, the IO queue can also be deleted for the reset operation, instead of sending the IOs to the host in the primary selection timeout, which improves the reset speed and reliability.
  • it may also include an instruction receiving module, a queue creation module, an IO request receiving module, a feature code writing module, and an IO request sending module; wherein,
  • the instruction receiving module is used to receive the queue creation instruction of the Host
  • the queue creation module is used to create the IO queue and the feature code of the IO queue according to the queue creation instruction;
  • the IO request receiving module is used to receive the IO request sent by the Host;
  • the feature code writing module is used to write the feature code into the IO request
  • the IO request sending module is used to send the IO request with the characteristic code to the back-end business module through the IO queue.
  • the feature code can be formulated according to the queue ID of the IO queue, CPU tick count information, and the current number of power-on times of the SSD device.
  • the above feature code writing module is specifically configured to write the feature code into the context information in the IO request.
  • the above-mentioned feature code judgment module 12 may include a feature code acquisition unit and a feature code judgment unit; wherein,
  • a feature code obtaining unit used to obtain the feature code carried in the IO context information
  • the feature code judgment unit is used to judge whether there is an IO queue corresponding to the feature code.
  • it may also include a deletion instruction receiving module and a queue deletion module; wherein,
  • the deletion instruction receiving module is used to receive the queue deletion instruction sent by the Host;
  • the queue deletion module is used to delete the corresponding IO queue directly according to the queue deletion instruction.
  • the embodiment of the present invention also discloses a device for resetting an SSD disk controller, comprising:
  • the processor is used for executing the computer program to implement the foregoing method for resetting the SSD disk controller.
  • An embodiment of the present invention further discloses a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the foregoing method for resetting an SSD disk controller is implemented.

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

Procédé, système et appareil de réinitialisation de contrôleur de disque de type DSS et support de stockage lisible par ordinateur. Le procédé est appliqué à un module d'interface de protocole d'extrémité frontale et consiste : à recevoir une E/S envoyée par un module de service d'extrémité arrière (S11) ; à déterminer si une file d'attente d'E/S correspondant à un code d'élément de service que porte l'E/S est présente (S12) ; si tel n'est pas le cas, à abandonner l'E/S (S13). Le fait de savoir si une file d'attente d'E/S correspondant à une E/S est présente est déterminé à l'aide d'un code d'élément de service dans l'E/S, et, selon que la file d'attente d'E/S est présente ou non, le fait de savoir si l'E/S est ou non une E/S à temporisation et le fait de savoir si l'E/S peut être envoyée à une extrémité hôte sont déterminés, de telle sorte que la file d'attente d'E/S peut être supprimée avec succès pour une opération de réinitialisation même avant qu'un module de service d'extrémité arrière libère toutes les E/S, et la situation dans laquelle une E/S à temporisation est envoyée à l'extrémité hôte est ainsi évitée, ce qui permet d'améliorer la vitesse et la fiabilité de la réinitialisation.
PCT/CN2021/077023 2020-06-30 2021-02-20 Procédé, système et appareil de réinitialisation de contrôleur de disque de type dss, et support de stockage lisible WO2022001138A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN111857579B (zh) * 2020-06-30 2024-02-09 广东浪潮大数据研究有限公司 一种ssd盘片控制器复位方法、系统、装置及可读存储介质
CN112612410B (zh) * 2020-12-01 2022-12-27 苏州浪潮智能科技有限公司 一种应用于固态硬盘内命令的异常处理的方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108027642A (zh) * 2015-06-24 2018-05-11 英特尔公司 用于隔离输入/输出计算资源的系统和方法
CN109983449A (zh) * 2018-06-30 2019-07-05 华为技术有限公司 数据处理的方法和存储系统
US20190317696A1 (en) * 2018-04-13 2019-10-17 Samsung Electronics Co., Ltd. METHOD FOR HANDLING COMMAND IN CONFLICT SCENARIO IN NON-VOLATILE MEMORY EXPRESS (NVMe) BASED SOLID-STATE DRIVE (SSD) CONTROLLER
CN111164566A (zh) * 2018-03-06 2020-05-15 西部数据技术公司 具有主机侧命令注入的非易失性存储系统
CN111857579A (zh) * 2020-06-30 2020-10-30 广东浪潮大数据研究有限公司 一种ssd盘片控制器复位方法、系统、装置及可读存储介质

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100035327A (ko) * 2008-09-26 2010-04-05 주식회사 엠트론스토리지테크놀로지 동기화장치가 구비된 에스에스디와 이를 이용한 비휘발성 메모리의 데이터 안정화 방법
CN105589758B (zh) * 2014-11-14 2019-03-01 华为数字技术（成都）有限公司 一种ssd复位方法及装置
CN104536701B (zh) * 2014-12-23 2018-02-06 记忆科技(深圳)有限公司 一种nvme协议多命令队列的实现方法及系统
CN106484549B (zh) * 2015-08-31 2019-05-10 华为技术有限公司 一种交互方法、NVMe设备、HOST及物理机系统
US10521305B2 (en) * 2016-04-29 2019-12-31 Toshiba Memory Corporation Holdup time measurement for solid state drives
CN107818056B (zh) * 2016-09-14 2021-09-07 华为技术有限公司 一种队列管理方法及装置
CN106648851A (zh) * 2016-11-07 2017-05-10 郑州云海信息技术有限公司 一种多控存储中io管理的方法和装置
CN107239238B (zh) * 2017-07-27 2020-09-04 郑州云海信息技术有限公司 一种基于分布式锁的存储的io操作方法及装置
CN107436857A (zh) * 2017-07-31 2017-12-05 郑州云海信息技术有限公司 一种增强型spi装置及利用该装置进行数据传输的方法
US10757189B2 (en) * 2018-04-30 2020-08-25 EMC IP Holding Company LLC Service level objection based input-output selection utilizing multi-path layer of host device
CN111124307B (zh) * 2019-12-20 2022-06-07 北京浪潮数据技术有限公司 一种数据下刷方法、装置、设备及可读存储介质
CN111103960B (zh) * 2019-12-22 2021-06-29 北京浪潮数据技术有限公司 一种Nvme SSD及其复位方法和系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108027642A (zh) * 2015-06-24 2018-05-11 英特尔公司 用于隔离输入/输出计算资源的系统和方法
CN111164566A (zh) * 2018-03-06 2020-05-15 西部数据技术公司 具有主机侧命令注入的非易失性存储系统
US20190317696A1 (en) * 2018-04-13 2019-10-17 Samsung Electronics Co., Ltd. METHOD FOR HANDLING COMMAND IN CONFLICT SCENARIO IN NON-VOLATILE MEMORY EXPRESS (NVMe) BASED SOLID-STATE DRIVE (SSD) CONTROLLER
CN109983449A (zh) * 2018-06-30 2019-07-05 华为技术有限公司 数据处理的方法和存储系统
CN111857579A (zh) * 2020-06-30 2020-10-30 广东浪潮大数据研究有限公司 一种ssd盘片控制器复位方法、系统、装置及可读存储介质

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