CN106897161A - A kind of data guard method and device - Google Patents
A kind of data guard method and device Download PDFInfo
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- CN106897161A CN106897161A CN201710100256.3A CN201710100256A CN106897161A CN 106897161 A CN106897161 A CN 106897161A CN 201710100256 A CN201710100256 A CN 201710100256A CN 106897161 A CN106897161 A CN 106897161A
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- work queue
- variable
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- queue
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/546—Message passing systems or structures, e.g. queues
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/52—Program synchronisation; Mutual exclusion, e.g. by means of semaphores
- G06F9/526—Mutual exclusion algorithms
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2209/00—Indexing scheme relating to G06F9/00
- G06F2209/54—Indexing scheme relating to G06F9/54
- G06F2209/548—Queue
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- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The present invention proposes a kind of data guard method and device.A kind of data guard method, is applied to work queue, and the method includes：Receive and store data of joining the team；Judge whether the work queue has expired；If the work queue is less than in the tail of the queue addition mutual exclusion lock of the work queue.Using above-mentioned technical proposal, mutual exclusion lock only is added in tail of the queue when queue is discontented, eliminate and added when queue has been expired the mutual exclusion expense that mutual exclusion lock is brought, overhead is saved on the whole.
Description
Technical field
The present invention relates to Internet protocol storage area network (Internet Protocol Storage Area
Network, IPSAN) technical field, more particularly to a kind of data guard method and device.
Background technology
With the development and the popularization of computer of society, the information content in network is in explosive increase, the networking of storage
New highlight as IT technologies.Store building for network so that people can be easy to altogether by the information Store of magnanimity to network-side
Enjoy.In user terminal, operating system provides the user the interface of access protocol stack, it is ensured that user can be worked by agreement stack addressing
Queue, carries out data storage and reads.
In multi-core CPU hardware configuration, if to give full play to the computing capability of processor, it is necessary to held using multithreading
OK.In multi-thread programming, when user operates to the sharing data resources in work queue, it is necessary to be come using mutual exclusion lock
Shared data is protected.Specifically, when user conducts interviews to the shared data of work queue, such as performing and joining the team or go out
, it is necessary to head of the queue and tail of the queue in operation add mutual exclusion lock so as to be protected by shared data when team operates.It should be noted that mutually
It is very big to denounce the expense of operation, and in the prior art, for all joining the team in critical zone (sharing data resources region)
Operation, adds mutual exclusion lock, and overhead is very big.
The content of the invention
Defect and deficiency based on above-mentioned prior art, the present invention propose a kind of data guard method and device, using this
Method, protects only when work queue is discontented to data addition mutual exclusion lock, eliminates the mutual exclusion expense when queue has been expired.
A kind of data guard method, is applied to work queue, and the method includes：
Receive and store data of joining the team；
Judge whether the work queue has expired；
If the work queue is less than in the tail of the queue addition mutual exclusion lock of the work queue.
Preferably, after the reception and storing data of joining the team, judge whether the work queue has expired it described
Before, the method also includes：
Generation characterizes the variable of the work queue state；
Wherein, when the work queue has been expired, the value of the variable is the first value of setting；When the work team
Row less than when, the value of the variable is the second value of setting.
Preferably, the generation characterizes the variable of the work queue state, including：
Generation characterizes the atom shaping variable of the work queue state.
Preferably, it is described to judge whether the work queue has expired, including：
According to the variable, judge whether the work queue has expired.
Preferably, it is described according to the variable, judge whether the work queue has expired, including：
Read the value of the variable；
If the value of the variable is the first value of the setting, judge that the work queue has been expired；
If the value of the variable is the second value of the setting, judge the work queue less than.
A kind of data protecting device, is applied to work queue, and the device includes：
Data receipt unit, for receiving and stores data of joining the team；
Judging unit, for judging whether the work queue has expired；
Processing unit, for the judging unit judge the work queue less than when, in the team of the work queue
Tail adds mutual exclusion lock.
Preferably, described device also includes：
Variable generation unit, the variable of the work queue state is characterized for generating；
Wherein, when the work queue has been expired, the value of the variable is the first value of setting；When the work team
Row less than when, the value of the variable is the second value of setting；
Preferably, when the variable generation unit generation characterizes the variable of the work queue state, specifically for：
Generation characterizes the atom shaping variable of the work queue state.
Preferably, when the judging unit judges whether the work queue has expired, specifically for：
According to the variable, judge whether the work queue has expired.
Preferably, the judging unit is according to the variable, when judging whether the work queue has expired, specifically for：
Read the value of the variable；
If the value of the variable is the first value of the setting, judge that the work queue has been expired；
If the value of the variable is the second value of the setting, judge the work queue less than.
Data guard method proposed by the present invention, is applied to work queue, and the method includes：Receive and store number of joining the team
According to；Judge whether the work queue has expired；If the work queue is less than mutual in the tail of the queue addition of the work queue
Reprimand lock.Using above-mentioned technical proposal, mutual exclusion lock only is added in tail of the queue when queue is discontented, eliminate when queue has been expired and add mutual exclusion
The mutual exclusion expense that lock strap is come, saves overhead on the whole.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of data guard method provided in an embodiment of the present invention；
Fig. 2 is protocol stack structure schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the schematic flow sheet of another data guard method provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of data protecting device provided in an embodiment of the present invention；
Fig. 5 is the structural representation of another data protecting device provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the invention discloses a kind of data guard method, work queue is applied to, shown in Figure 1, the method
Including：
S101, receive and store data of joining the team；
Specifically, embodiment of the present invention technical scheme can be applied to Internet protocol storage area network (Internet
Protocol Storage Area Network, IPSAN).In IPSAN, user's PC terminal access protocol stacks are assisted to kernel
View stack work queue is operated.In view of the functional redundancy of traditional kernel protocol stack, customization are poor, operating system overhead is big,
The defect such as memory copying expense is big, these problems can be well avoided using protocol stack is built by the way of user's space.
For example, in (SuSE) Linux OS, shown in Figure 2, system call interfaces provide user's space access protocol
The entrance of stack：Socket layers provides one group of common interface to support TCP and udp protocol；Network protocol layer is responsible for realizing TCP/
The handling process of the various procotols in IP agreement race；Equipment irrelative layer supplies device driver there is provided one group of common interface
Use, wherein device driver designs realization for specific physical equipment, there is provided the entrance of the operation network equipment.Bottom
When layer data bag is from the network interface card buffering area of user terminal into kernel, hardware interrupts, corresponding interrupt handling program meeting can be triggered
Packet is copied in modes such as direct memory access (Direct Memory Access, DMA) by kernel from network interface card buffering area
In the buffering area opened up.
Based on above-mentioned configuration, user terminal can be joined the team or dequeue operation to work queue.When user terminal is to work
It is the data that will need storage when queue carries out enqueue operations, is sent to work queue, is stored work queue；When
It is the data that needs are read out from work queue when user terminal carries out dequeue operation to work queue.
In work queue, it is sharing data resources to have some data, and these data resources can be by multiple user threads
Conduct interviews operation.This is operated in order to ensure not accessed by other needs when a thread conducts interviews these data operation
The thread of a little data is bothered, and work queue needs to set these data on protection lock, so that these data can only be in the same time
Operated by a thread accesses.That is, embodiment of the present invention technical scheme is in order to the shared data in work queue
Protected, be applied to the critical zone of work queue, that is, need lock the queue where the data resource of protection
Region.Therefore, the work queue involved by the embodiment of the present invention, can regard the work for needing to protect to data plus mutual exclusion lock as
Queue.
S102, judge whether the work queue has expired；
Specifically, work queue is after enqueue operations of every receiving, all check whether one action queue has expired.
If S103, the work queue are less than in the tail of the queue addition mutual exclusion lock of the work queue.
If specifically, after an enqueue operations are received, work queue detection judges that work queue is not yet full, then subsequently
There can also be user terminal to perform enqueue operations, likewise, it may happen that multiple user terminals open thread performs enqueue operations
Situation, it is therefore desirable to team's mutual exclusion lock is added to existing data in work queue, can only have a line in synchronization to protect
Cheng Zhihang enqueue operations.All carried out in queue tail due to enqueue operations again, therefore tail of the queue in work queue adds mutual exclusion
Enqueue operations are protected by lock.
Opposite, if after an enqueue operations are received, work queue detection judges that work queue has been expired, then subsequently not
Can have again user terminal perform enqueue operations because now work queue no space receives enqueue operations again, now, also
Will not be joined the team the situation of conflict, therefore, when judging that work queue has been expired, work queue is avoided the need for again as in queue
Data add mutual exclusion lock, to save system mutual exclusion expense.
Data guard method proposed by the present invention, is applied to work queue, and the method includes：Receive and store number of joining the team
According to；Judge whether the work queue has expired；If the work queue is less than mutual in the tail of the queue addition of the work queue
Reprimand lock.Using above-mentioned technical proposal, mutual exclusion lock only is added in tail of the queue when queue is discontented, eliminate when queue has been expired and add mutual exclusion
The mutual exclusion expense that lock strap is come, saves overhead on the whole.
Optionally, in another embodiment of the present invention, it is shown in Figure 3, step S301 is being performed, is being received and is stored
After data of joining the team, before performing step S303, judging whether the work queue has expired, the method also includes：
S302, generation characterize the variable of the work queue state；
Wherein, when the work queue has been expired, the value of the variable is the first value of setting；When the work team
Row less than when, the value of the variable is the second value of setting.
Specifically, embodiment of the present invention technical scheme according to work queue whether full state, decide whether to queue
Add operation mutual exclusion lock protection of joining the team.Therefore, the state of work queue is specified, is determined whether to add mutual exclusion lock for work queue
Key message.Based on above-mentioned principle, after data are joined the team in receiving every time, a variable for sign work queue state is generated,
The variable is used to identify whether work queue has expired：When work queue has been expired, the value of the variable of generation is the first value；Work as work
Make queue not yet completely when, the value of the variable of generation is the second value.The value of the variable by generating is different, can be with ocular and clear
Ground determines the state of work at present queue.
For example, receiving enqueue operations every time, storage is joined the team after data, generates variable FullFlag：When work queue
Man Shi, FullFlag=1；When work queue is not yet expired, FullFlag=0.By the value for reading variable FullFlag, you can
Quickly determine work queue state.
It should be noted that when embodiment of the present invention technical scheme is implemented, limited according to program form, can be with
Two variables of mutual exclusion of generation, for identifying work queue state.For example, generation variable FullFlag and EmptyFlag：Work as work
When making queue and having expired, FullFlag=1, EmptyFlag=0；When work queue is not yet expired, FullFlag=0,
EmptyFlag=1.By the value for reading both FullFlag or EmptyFlag one, it is possible to determine work queue state.
Step in the embodiment of the method shown in step S301, S303, S304 difference corresponding diagram 1 in the present embodiment
S101, S102, S103, its particular content refer to the content of corresponding embodiment of the method, and here is omitted.
Optionally, in another embodiment of the present invention, the generation characterizes the variable of the work queue state, bag
Include：
Generation characterizes the atom shaping variable of the work queue state.
Specifically, in embodiments of the present invention, the variable of generation is atom shaping variable.Accordingly, the variable is read
Value needs to be realized by integer atomic operation.Atomic operation causes that the operation for reading the variate-value is without interruption, same
Time can only be read by a thread, be eliminated to read the expense that the value of the variable sets mutual exclusion lock.
For example, generation atom shaping variable FullFlag：When work queue has been expired, FullFlag=1；Work as work queue
When not yet completely, FullFlag=0.By the value for reading variable FullFlag, you can quickly determine work queue state.
Optionally, in another embodiment of the present invention, it is described to judge whether the work queue has expired, including：
According to the variable, judge whether the work queue has expired.
Specifically, because work queue after enqueue operations are received every time, can all generate a sign work queue state
Variable, therefore, by the variable, you can intuitively judge whether the queue has expired.Specifically, the change according to agreement is measured
Value and the corresponding relation of work queue state, read the value of the variable, you can determine the state of the work queue.
Optionally, in another embodiment of the present invention, it is described according to the variable, whether judge the work queue
It has been expired that, including：
Read the value of the variable；
If the value of the variable is the first value of the setting, judge that the work queue has been expired；
If the value of the variable is the second value of the setting, judge the work queue less than.
Specifically, according to the rule of generation variable, the different values of variable correspond to the different conditions of work queue, work as change
When measuring value for the first value, the full state of work queue is correspond to, when variable-value is the second value, correspond to work
Queue less than state.Therefore, by reading the value of generated variable, the state of work queue can be specified：If variable
Value be the first value, then illustrate work queue expired；If the value of variable be the second value, illustrate work queue less than.
For example, it is assumed that the variable of generation is FullFlag, also, according to agreement, when work queue has been expired, generation
FullFlag=1；When work queue is not yet expired, FullFlag=0 is generated.So when work queue state is judged, read
The value of variable FullFlag, if FullFlag=1, illustrates that work queue has been expired, if FullFlag=0, illustrates work
Make queue less than.
The embodiment of the invention also discloses a kind of data protecting device, work queue is applied to, shown in Figure 4, the dress
Put including：
Data receipt unit 401, for receiving and stores data of joining the team；
Judging unit 402, for judging whether the work queue has expired；
Processing unit 403, for judging unit 402 judge the work queue less than when, in the work queue
Tail of the queue adds mutual exclusion lock.
Specifically, in the present embodiment unit specific works content, refer to the content of corresponding embodiment of the method,
Here is omitted.
Data protecting device proposed by the present invention, is applied to work queue, the device protect work queue data when,
After data receipt unit 401 is received and stores data of joining the team；Judging unit 402 judges whether the work queue has expired；If
The work queue is less than then processing unit 403 adds mutual exclusion lock in the tail of the queue of the work queue.Using above-mentioned technical side
Case, only adds mutual exclusion lock when queue is discontented in tail of the queue, eliminates and added when queue has been expired the mutual exclusion expense that mutual exclusion lock is brought, whole
Overhead is saved on body.
Optionally, in another embodiment of the present invention, shown in Figure 5, described device also includes：
Variable generation unit 404, the variable of the work queue state is characterized for generating；
Wherein, when the work queue has been expired, the value of the variable is the first value of setting；When the work team
Row less than when, the value of the variable is the second value of setting；
Specifically, in the present embodiment variable generation unit 404 specific works content, refer to corresponding embodiment of the method
Content, here is omitted.
Optionally, in another embodiment of the present invention, the generation of variable generation unit 404 characterizes work team's column-shaped
During the variable of state, specifically for：
Generation characterizes the atom shaping variable of the work queue state.
Specifically, in the present embodiment variable generation unit 404 specific works content, refer to corresponding embodiment of the method
Content, here is omitted.
Optionally, in another embodiment of the present invention, judging unit 402 judges whether the work queue has expired
When, specifically for：
According to the variable, judge whether the work queue has expired.
Specifically, in the present embodiment judging unit 402 specific works content, refer to the interior of corresponding embodiment of the method
Hold, here is omitted.
Optionally, in another embodiment of the present invention, judging unit 402 judges the work according to the variable
When whether queue has expired, specifically for：
Read the value of the variable；
If the value of the variable is the first value of the setting, judge that the work queue has been expired；
If the value of the variable is the second value of the setting, judge the work queue less than.
Specifically, in the present embodiment judging unit 402 specific works content, refer to the interior of corresponding embodiment of the method
Hold, here is omitted.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (10)
1. a kind of data guard method, it is characterised in that be applied to work queue, the method includes：
Receive and store data of joining the team；
Judge whether the work queue has expired；
If the work queue is less than in the tail of the queue addition mutual exclusion lock of the work queue.
2. method according to claim 1, it is characterised in that after the reception and storing data of joining the team, described
Whether before judging the work queue and having expired, the method also includes：
Generation characterizes the variable of the work queue state；
Wherein, when the work queue has been expired, the value of the variable is the first value of setting；When the work queue not
Man Shi, the value of the variable is the second value of setting.
3. method according to claim 2, it is characterised in that the generation characterizes the variable of the work queue state,
Including：
Generation characterizes the atom shaping variable of the work queue state.
4. method according to claim 2, it is characterised in that described to judge whether the work queue has expired, including：
According to the variable, judge whether the work queue has expired.
5. method according to claim 4, it is characterised in that described according to the variable, judges that the work queue is
It is no to have expired, including：
Read the value of the variable；
If the value of the variable is the first value of the setting, judge that the work queue has been expired；
If the value of the variable is the second value of the setting, judge the work queue less than.
6. a kind of data protecting device, it is characterised in that be applied to work queue, the device includes：
Data receipt unit, for receiving and stores data of joining the team；
Judging unit, for judging whether the work queue has expired；
Processing unit, for the judging unit judge the work queue less than when, add in the tail of the queue of the work queue
Plus mutual exclusion lock.
7. device according to claim 6, it is characterised in that described device also includes：
Variable generation unit, the variable of the work queue state is characterized for generating；
Wherein, when the work queue has been expired, the value of the variable is the first value of setting；When the work queue not
Man Shi, the value of the variable is the second value of setting.
8. device according to claim 7, it is characterised in that the variable generation unit generation characterizes the work queue
During the variable of state, specifically for：
Generation characterizes the atom shaping variable of the work queue state.
9. device according to claim 7, it is characterised in that the judging unit judges whether the work queue has expired
When, specifically for：
According to the variable, judge whether the work queue has expired.
10. device according to claim 9, it is characterised in that the judging unit judges the work according to the variable
When making queue and whether having expired, specifically for：
Read the value of the variable；
If the value of the variable is the first value of the setting, judge that the work queue has been expired；
If the value of the variable is the second value of the setting, judge the work queue less than.
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| CN201710100256.3A CN106897161A (en) | 2017-02-23 | 2017-02-23 | A kind of data guard method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710100256.3A CN106897161A (en) | 2017-02-23 | 2017-02-23 | A kind of data guard method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111858095A (en) * | 2020-07-17 | 2020-10-30 | 山东云海国创云计算装备产业创新中心有限公司 | Hardware queue multithreading sharing method, device, equipment and storage medium |
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| CN103516580A (en) * | 2012-06-26 | 2014-01-15 | 北京大学 | Method of realizing message receiving and forwarding based on message queue and system thereof |
| CN105868031A (en) * | 2016-03-24 | 2016-08-17 | 车智互联（北京）科技有限公司 | A data transmission device and method |
| CN106201730A (en) * | 2016-07-07 | 2016-12-07 | 浪潮(北京)电子信息产业有限公司 | A kind of linux User space mutual exclusion lock deadlock detection method and system |
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| CN103516580A (en) * | 2012-06-26 | 2014-01-15 | 北京大学 | Method of realizing message receiving and forwarding based on message queue and system thereof |
| CN105868031A (en) * | 2016-03-24 | 2016-08-17 | 车智互联（北京）科技有限公司 | A data transmission device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111858095A (en) * | 2020-07-17 | 2020-10-30 | 山东云海国创云计算装备产业创新中心有限公司 | Hardware queue multithreading sharing method, device, equipment and storage medium |
| CN111858095B (en) * | 2020-07-17 | 2022-06-10 | 山东云海国创云计算装备产业创新中心有限公司 | Hardware queue multithreading sharing method, device, equipment and storage medium |
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Application publication date: 20170627 |