CN110058818B - Method and system for optimizing descriptor processing sequence based on SSD - Google Patents

Method and system for optimizing descriptor processing sequence based on SSD Download PDF

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CN110058818B
CN110058818B CN201910312128.4A CN201910312128A CN110058818B CN 110058818 B CN110058818 B CN 110058818B CN 201910312128 A CN201910312128 A CN 201910312128A CN 110058818 B CN110058818 B CN 110058818B
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descriptor
priority
channel
issuing
nand
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CN110058818A (en
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马越
冯元元
周晨杰
周强
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Shenzhen Union Memory Information System Co Ltd
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Shenzhen Union Memory Information System Co Ltd
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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
    • 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
    • G06F3/0614—Improving the reliability of storage systems
    • G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
    • 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
    • G06F3/062—Securing storage systems
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Abstract

The invention relates to a method and a system for optimizing descriptor processing sequence based on SSD; the method comprises the following steps: s1, judging whether an abnormal event triggers interruption; s2, issuing a descriptor corresponding to the exception handling, and marking the descriptor as a high-priority descriptor; s3, judging whether the descriptor with priority mark exists in the down-sending descriptor; s4, the NFC channel issues descriptors in sequence; s5, judging whether the CDMA channel is in idle state; s6, waiting for the CDMA channel to be idle; s7, the CDMA channel issues the descriptor to the NAND, and the NAND executes the descriptor in sequence; s8, resetting the CDMA channel, and the green channel of NFC preferentially issues a priority mark descriptor; s9, the CDMA channel issues a priority label descriptor to the NAND, which implements the priority label descriptor. The descriptor with the priority execution mark is preferentially executed from the green channel, so that the execution sequence of the descriptor is effectively improved, the completion time of the executed descriptor is reduced, and the safety and the stability of the SSD are improved.

Description

Method and system for optimizing descriptor processing sequence based on SSD
Technical Field
The invention relates to the technical field of optimization descriptors of solid state disks, in particular to a method and a system for optimizing descriptor processing sequence based on SSD.
Background
Each CE of the existing NFC channel corresponds to one CDMA channel, when the descriptor is issued, the descriptor is issued to the NFC channel in sequence by NFC, each NFC channel is bound with the corresponding CDMA channel, once the descriptor is issued by the channel, the CDMA channel cannot be reused until the channel is cleared, and for the condition of abnormal processing, the NFC channel is used as an SSD of a storage device, some important data (FTL mapping table) are required to be written into the NAND to prevent data loss.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a system for optimizing descriptor processing sequence based on SSD.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for optimizing descriptor processing order based on SSD comprising the steps of:
s1, judging whether an abnormal event triggers interruption; if yes, go to S2; if not, go to S3;
s2, issuing a descriptor corresponding to the exception handling, and marking the descriptor as a high-priority descriptor;
s3, judging whether the descriptor with priority mark exists in the down-sending descriptor; if yes, go to S8; if not, go to S4;
s4, the NFC channel issues descriptors in sequence;
s5, judging whether the CDMA channel is in idle state; if yes, go to S7; if not, entering S6;
s6, waiting for the CDMA channel to be idle, and returning to S5;
s7, the CDMA channel issues the descriptor to the NAND, and the NAND executes the descriptor in sequence;
s8, resetting the CDMA channel, and the green channel of NFC preferentially issues a priority mark descriptor;
s9, the CDMA channel issues a priority label descriptor to the NAND, which implements the priority label descriptor.
The further technical scheme is as follows: before S1, the method further includes: the exception handling work is started.
The further technical scheme is as follows: the S7 includes:
s71, the CDMA channel sends down the descriptor to the NAND;
s72, NAND executes the descriptor in order.
The further technical scheme is as follows: the S8 includes:
s81, resetting the CDMA channel;
s82, the green channel of NFC issues priority label descriptors preferentially.
The further technical scheme is as follows: the S9 includes:
s91, the CDMA channel sends down the priority label descriptor to the NAND;
s92, the NAND executes the priority tagged descriptors.
A system for optimizing descriptor processing order based on SSD, comprising: the system comprises a first judgment unit, a processing marking unit, a second judgment unit, a channel issuing unit, a third judgment unit, a waiting unit, an issuing execution unit, a reset priority issuing unit and an issuing execution priority unit;
the first judging unit is used for judging whether an abnormal event triggers interruption or not;
the processing marking unit is used for issuing a descriptor corresponding to the exception handling and marking the descriptor as a high-priority descriptor;
the second judging unit is used for judging whether the descriptor with the priority mark exists in the issued descriptor;
the channel issuing unit is used for issuing descriptors in sequence by the NFC channel;
the third judging unit is used for judging whether the CDMA channel is in an idle state;
the waiting unit is used for waiting for the idle of the CDMA channel;
the issuing execution unit is used for the CDMA channel to issue the descriptor to the NAND, and the NAND executes the descriptor in sequence;
the resetting priority issuing unit is used for resetting the CDMA channel, and the green channel of the NFC issues priority mark descriptors preferentially;
the issuing execution priority unit is used for the CDMA channel to issue a priority mark descriptor to the NAND, and the NAND executes the descriptor with the priority mark.
The further technical scheme is as follows: the issuing execution unit comprises an issuing module and an execution module;
the issuing module is used for the CDMA channel to issue the descriptor to the NAND;
the execution module is used for executing the descriptor in the NAND sequence.
The further technical scheme is as follows: the reset priority issuing unit comprises a reset module and a priority issuing module;
the reset module is used for resetting the CDMA channel;
and the priority issuing module is used for issuing the priority mark descriptor by the green channel of the NFC preferentially.
The further technical scheme is as follows: the issuing execution priority unit comprises an issuing priority module and an execution priority module;
the issuing priority module is used for the CDMA channel to issue a priority mark descriptor to the NAND;
the execution priority module is used for NAND execution of the descriptors with priority marks.
Compared with the prior art, the invention has the beneficial effects that: by preferentially executing the descriptor with the preferential execution mark from the green channel, the execution sequence of the descriptor is effectively improved, the completion time of the descriptor needing to be executed in time is reduced, the safety and the stability of the SSD are effectively improved, and the requirement is better met.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a block diagram of a prior art NFC channel;
FIG. 2 is a prior art NFC exception handling flow diagram;
FIG. 3 is a flowchart of a method for optimizing descriptor processing sequences based on SSD in accordance with the present invention;
FIG. 4 is an optimized block diagram of the green channel of NFC of the present invention;
FIG. 5 is a block diagram of a system for optimizing descriptor processing sequences based on SSD, in accordance with the present invention.
10 first judging unit 20 processes the marking unit
30 second judging unit and 40 channel issuing unit
50 third judging unit 60 waiting unit
70 issuing execution unit 71 issuing module
72 execution module 80 resets the priority issue unit
81 resetting module 82 priority issuing module
90 issue execution priority unit 91 issues priority module
92 execute priority module
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and illustrated with reference to the following specific embodiments, but not limited thereto.
The specific embodiment shown in fig. 1 to 5, wherein the prior art is shown in fig. 1 to 2; each CE of the NFC channel corresponds to one CDMA channel, when the descriptor is issued, the descriptor is issued to the NFC channel in sequence by NFC, each NFC channel is bound with the corresponding CDMA channel, and once the descriptor is issued by the channel, the CDMA channel cannot be reused until the channel is cleared.
As shown in fig. 2, the NFC exception handling process includes the following steps:
1. judging whether an abnormal interrupt is generated; 2. when an interrupt is generated, issuing a descriptor corresponding to the processing exception; 3. the NFC sends the descriptors in the NFC channel in sequence; 4. judging whether the CDMA channel is idle or not; 5. the NFC channel issues to the CDMA channel; 6. the CDMA channel issues a descriptor to the NAND; 7. the NAND executes the descriptors in order.
For the case of exception handling, the SSD as a storage device needs to write some important data (FTL mapping table) into the NAND to prevent data loss, and according to the above sequential execution method, it is not timely, and the descriptors that we need to complete are responded in the shortest time, so that the SSD security and data integrity are reduced.
As shown in fig. 3 to 4, the present invention discloses a method for optimizing a descriptor processing sequence based on SSD, comprising the following steps:
s1, judging whether an abnormal event triggers interruption; if yes, go to S2; if not, go to S3;
s2, issuing a descriptor corresponding to the exception handling, and marking the descriptor as a high-priority descriptor;
s3, judging whether the descriptor with priority mark exists in the down-sending descriptor; if yes, go to S8; if not, entering S4;
s4, the NFC channel issues descriptors in sequence;
s5, judging whether the CDMA channel is in idle state; if yes, go to S7; if not, go to S6;
s6, waiting for the CDMA channel to be idle, and returning to S5;
s7, the CDMA channel issues the descriptor to the NAND, and the NAND executes the descriptor in sequence;
s8, resetting the CDMA channel, and the green channel of NFC preferentially issues a priority mark descriptor;
s9, the CDMA channel issues a priority label descriptor to the NAND, which implements the priority label descriptor.
Before S1, the method further includes: the exception handling work is started.
Wherein the S7 includes:
s71, the CDMA channel sends down the descriptor to NAND;
s72, NAND executes the descriptor in order.
Wherein the S8 includes:
s81, resetting the CDMA channel;
s82, the green channel of NFC issues priority label descriptors preferentially.
Wherein the S9 includes:
s91, the CDMA channel sends down the priority label descriptor to the NAND;
s92, the NAND executes the priority tagged descriptors.
As shown in fig. 4, each NFC Channel has a corresponding NFC Green Channel (Green Channel), and NFC can be issued to the Green Channel in addition to the ordinary NFC Channel, and the descriptor issued to the Green Channel preferentially occupies an idle CDMA Channel and preferentially issues the descriptor to the NAND.
The green channel can store descriptors which need to respond in time aiming at a channel independent of the NFC channel, and is applied aiming at exception handling.
According to the method for processing the exception handling by using the green channel optimization descriptor processing sequence, the controllability of the descriptor execution sequence can be greatly improved, the NAND operation sequence aiming at the exception of the SSD is optimized, the NFC exception handling efficiency is improved, and the reliability and the safety of the SSD data are improved.
As shown in FIG. 5, the present invention discloses a system for optimizing descriptor processing order based on SSD, comprising: a first judging unit 10, a processing marking unit 20, a second judging unit 30, a channel issuing unit 40, a third judging unit 50, a waiting unit 60, an issuing execution unit 70, a reset priority issuing unit 80 and an issuing execution priority unit 90;
the first judging unit 10 is configured to judge whether an abnormal event triggers an interrupt;
the processing marking unit 20 is configured to issue a descriptor corresponding to exception handling, and mark the descriptor as a high-priority descriptor;
the second judging unit 30 is configured to judge whether there is a descriptor with a priority flag in the issued descriptor;
the channel issuing unit 40 is configured to issue descriptors in sequence in an NFC channel;
the third judging unit 50 is configured to judge whether the CDMA channel is in an idle state;
the waiting unit 60 is configured to wait for the CDMA channel to be idle;
the issuing execution unit 70 is configured to issue the descriptor to the NAND through the CDMA channel, and the NAND executes the descriptor in sequence;
the reset priority issuing unit 80 is configured to reset the CDMA channel, and the green channel of the NFC preferentially issues the priority flag descriptor;
the issuing execution priority unit 90 is configured to issue a priority flag descriptor to the NAND in the CDMA channel, and the NAND executes the priority flag descriptor.
Wherein, the issuing execution unit 70 includes an issuing module 71 and an execution module 72;
the issuing module 71 is configured to issue the descriptor to the NAND through the CDMA channel;
the execution module 72 is used for NAND in-order execution of the descriptors.
The reset priority issuing unit 80 includes a reset module 81 and a priority issuing module 82;
the reset module 81 is configured to reset the CDMA channel;
the priority issuing module 82 is configured to issue the priority flag descriptor preferentially for the green channel of NFC.
The issuing execution priority unit 90 includes an issuing priority module 91 and an execution priority module 92;
the issuing priority module 91 is used for the CDMA channel to issue a priority label descriptor to the NAND;
the execution priority module 92 is used for NAND execution of the priority tagged descriptors.
The execution sequence of the descriptors determines corresponding operations required by the NAND, when exception handling occurs, the execution sequence of the descriptors becomes more important, the descriptors with the priority execution marks are preferentially executed from the green channel, and the execution sequence of the descriptors can be effectively improved, so that the efficiency and timeliness of NFC exception handling are improved, and the stability and safety of the SSD are guaranteed.
The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.

Claims (9)

1. A method for optimizing descriptor processing order based on SSD, comprising the steps of:
s1, judging whether an abnormal event triggers interruption; if yes, go to S2; if not, go to S3;
s2, issuing a descriptor corresponding to the exception handling, and marking the descriptor as a high-priority descriptor;
s3, judging whether the descriptor with priority mark exists in the down-sending descriptor; if yes, go to S8; if not, go to S4;
s4, the NFC channel issues descriptors in sequence;
s5, judging whether the CDMA channel is in idle state; if yes, go to S7; if not, go to S6;
s6, waiting for the CDMA channel to be idle, and returning to S5;
s7, the CDMA channel issues the descriptor to the NAND, and the NAND executes the descriptor in sequence;
s8, resetting the CDMA channel, and the green channel of NFC preferentially issues a priority mark descriptor;
s9, the CDMA channel sends the priority label descriptor to the NAND, and the NAND executes the descriptor with priority label;
the green channel stores descriptors which need to respond timely for a channel independent of the NFC channel, and applies the descriptors to exception handling.
2. The method according to claim 1, wherein the step S1 is preceded by the step of: the exception handling work is started.
3. The method according to claim 1, wherein the S7 comprises:
s71, the CDMA channel sends down the descriptor to NAND;
s72, NAND executes the descriptor in order.
4. The method according to claim 1, wherein the S8 comprises:
s81, resetting the CDMA channel;
s82, the green channel of NFC issues priority label descriptors preferentially.
5. The method according to claim 1, wherein the S9 comprises:
s91, the CDMA channel sends down the priority label descriptor to the NAND;
s92, the NAND executes the priority tagged descriptors.
6. A system for optimizing descriptor processing order based on SSD, comprising: the system comprises a first judgment unit, a processing marking unit, a second judgment unit, a channel issuing unit, a third judgment unit, a waiting unit, an issuing execution unit, a reset priority issuing unit and an issuing execution priority unit;
the first judging unit is used for judging whether an abnormal event triggers interruption or not;
the processing marking unit is used for issuing a descriptor corresponding to the exception handling and marking the descriptor as a high-priority descriptor;
the second judging unit is used for judging whether the descriptor with the priority mark exists in the issued descriptor;
the channel issuing unit is used for issuing descriptors in sequence by the NFC channel;
the third judging unit is used for judging whether the CDMA channel is in an idle state;
the waiting unit is used for waiting for the idle of the CDMA channel;
the issuing execution unit is used for the CDMA channel to issue the descriptor to the NAND, and the NAND executes the descriptor in sequence;
the resetting priority issuing unit is used for resetting the CDMA channel, and the green channel of the NFC issues priority mark descriptors preferentially;
the issuing execution priority unit is used for the CDMA channel to issue a priority mark descriptor to the NAND, and the NAND executes the descriptor with the priority mark;
the green channel stores descriptors which need to respond timely for a channel independent of the NFC channel, and applies the descriptors to exception handling.
7. The SSD optimized descriptor processing sequence-based system of claim 6, wherein the issuing execution unit comprises an issuing module and an execution module;
the issuing module is used for the CDMA channel to issue the descriptor to the NAND;
the execution module is used for executing the descriptor in the NAND sequence.
8. The system of claim 6, wherein the reset priority issuing unit comprises a reset module and a priority issuing module;
the reset module is used for resetting the CDMA channel;
and the priority issuing module is used for issuing the priority mark descriptor by the green channel of the NFC preferentially.
9. The SSD optimized descriptor processing order based system of claim 6, wherein the issuing execution priority unit comprises an issuing priority module and an execution priority module;
the issuing priority module is used for the CDMA channel to issue a priority mark descriptor to the NAND;
the execution priority module is used for NAND execution of the descriptors with priority marks.
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