CN107529695A - The localization method and device that a kind of buffering area slowly leaks - Google Patents
The localization method and device that a kind of buffering area slowly leaks Download PDFInfo
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- CN107529695A CN107529695A CN201610443831.5A CN201610443831A CN107529695A CN 107529695 A CN107529695 A CN 107529695A CN 201610443831 A CN201610443831 A CN 201610443831A CN 107529695 A CN107529695 A CN 107529695A
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Abstract
The invention discloses the localization method that a kind of buffering area slowly leaks, methods described includes:Obtain system time when buffering area Buffer is allocated, and will be described allocated when system time preserve into corresponding Buffer structures;A Detection task is created, periodically traversal detection is carried out to each Buffer that distributed;The duration that each Buffer is allocated out is obtained, if the duration that the Buffer is allocated out is more than the time-out time of setting, the Buffer is calculated as leaking Buffer and preserved.Present invention also offers the positioner that a kind of buffering area slowly leaks, beneficial effects of the present invention are:The duration being allocated out by a kind of automatic monitoring Buffer, judge current Buffer with the presence or absence of slowly leakage, effectively oriented in a short time in the presence of the Buffer slowly leaked, lifting means complete machine stability and reliability with tester so as to help to develop.
Description
Technical field
The invention belongs to data communication field, and in particular to a kind of localization method that buffering area (Buffer) slowly leaks and
Device.
Background technology
With the rapid development of data communication field, the complexity of various datacom devices also greatly increases, data forwarding stream
The software processing flow of Cheng Zuowei device cores, on the basis of numerous functional protocols are integrated with, it is difficult to avoid the occurrence of data
Buffering area Buffer leakages, memory overflow, fly the knotty problem such as pointer.
In the prior art, the network equipment is after external equipment receives data, from Buffer ponds (Buffer Pool)
Apply Buffer, and by direct memory access (Direct Memory Access, DMA) mode by data storage to be allocated
In the corresponding Buffer gone out so that upper application module can carry out data processing by Buffer, and the storing process is without in
The participation of central processor (Central Processing Unit, CPU), data processing or data are completed in upper application module
After forwarding, Buffer is discharged back into Buffer ponds.
Slowly leakage does not have generally acknowledged definition to explain to so-called Buffer, and Buffer in the present invention is slowly leaked
Refer to that Buffer is not put back into Buffer ponds after being applied out.The problem of being leaked for Buffer, in the prior art may be used
To be realized by state current some debug command real time inspections Buffer.Such as:Developer can be ordered by keying in
Check the state in current Buffer ponds, including total Buffer numbers, be applied Buffer numbers and remaining available Buffer numbers etc..
Searched in order to facilitate positioning problems, can also be directed to and be applied Buffer progress next step information follow-ups, including current Buffer
Hold the stage and the operations such as Buffer contents are shown.But above-mentioned debugging error detection mode can not effectively find that Buffer is deposited
In situation about slowly leaking.Buffer slow leakage mainly has following characteristics:
1st, Buffer leaks cycle length, and the main frame continuous service extremely long time could find (far beyond the test strike-machine time)
In the presence of obvious Buffer leakage situations;
2nd, by some special trigger flows, such as the abort branch of board hot plug operations or certain agreement.This
If the special flow of class, which does not trigger, to be leaked, even if triggering, Buffer leakages quantity each time is very small, passes through
Debug command is not easy to discover;
Why so original debug command can not effectively find the problem of Buffer is slowly leaked, reason bag
Include:
1st, the data forwarding flow currently carried due to equipment is huge, it is necessary to the message number of caching is also more, so
Buffer demands number is also very more, and the basic order of magnitude is all in the even upper 100K of several 10K, so in test process, by compared with
Prolonged test or strike-machine checking, may only occur tens Buffer leakage, this is often treated as normally
Buffer is ignored using expense;
2nd, in test process, what tester often focused more on is whether the function of equipment in itself is normal, so working as
When there is the problem of Buffer is slowly leaked, because the correlation function of equipment is not immediately exposed to influence, tester is just not easy
Discover;
3rd, tester can not possibly ceaselessly check current Buffer in normal test process by debug command
Pond state, and every next state is recorded and contrasted, so as to draw the problem of whether there is Buffer leakages, such operation
Testing efficiency can be brought and have a strong impact on do not possess operability.
To sum up, slowly leakage is the problem of one kind can not be avoided definitely to Buffer, is not easy to discover in a short time and pair will not set
Standby complete machine business produce it is obvious influence, but once occur may result in that business is unstable until last deteriorate is shut down for complete machine
Serious consequence, so effectively avoiding problems significant to the stability of whole equipment.Meanwhile existing Buffer is adjusted
Examination order is wanted efficiently or in real time to find that the slow leakage problems of Buffer are relatively difficult, so such problem is often by band
To market, operation can be just found for a long time under real net environment, and it is serious Buffer consumptions etc. now occurred
Consequence, cause equipment can not normal work.
The content of the invention
The present invention provides the localization method and device that a kind of buffering area slowly leaks, can not to solve existing debug command
Efficiently or in real time find the slow leakage problems of Buffer.
The embodiments of the invention provide the localization method that a kind of buffering area slowly leaks, methods described includes:
Obtain system time when buffering area Buffer is allocated, and will be described allocated when system time preserve to right
In the Buffer structures answered;
A Detection task is created, periodically traversal detection is carried out to each Buffer that distributed, obtained in detection every
The duration that individual Buffer is allocated out, if the duration that the Buffer is allocated out is more than the time-out of setting
Between, then the Buffer is calculated as leaking Buffer and preserved.
Further, the duration that each Buffer is obtained in traversal and is allocated out, specifically include:Obtain
System time during detection, the system when Buffer preserved in system time when detecting and the Buffer structures is allocated
It is poor that time is made, and obtains the duration that the Buffer is allocated out.
Further, methods described also includes:Debug command is added, checks leakage Buffer number and/or leakage
Buffer details.
Further, the details of the leakage Buffer include:Leak Buffer current forwarding stages, leakage
During system when the duration and leakage Buffer that Buffer memory address, leakage Buffer are allocated out are allocated
Between.
Further, methods described also includes:Set miscue to switch, when detecting Buffer leakages, beat automatically
Print prompting.
On the other hand, the embodiment of the present invention provides the positioner that a kind of buffering area slowly leaks, and described device includes:
Time acquisition unit, for obtain buffering area Buffer be allocated when system time, and will be described allocated when
System time preserve into corresponding Buffer structures;
Threshold sets unit, for setting a time-out time;
Detection task unit, for creating a Detection task, periodically traversal inspection is carried out to each Buffer that distributed
Survey;The duration that Buffer is allocated out is obtained, if the duration that Buffer is allocated out is more than the time-out of setting
Time, then the Buffer is calculated as leaking Buffer and preserved.
Further, the time acquisition unit is specifically used for, and when detection has each distributed Buffer, obtains when detecting
System time, it is poor that the system time when Buffer preserved in system time when detecting and Buffer structures is allocated is made,
Obtain the duration that Buffer is allocated out.
Further, described device also includes:
Information display unit, for adding debug command, check leakage Buffer number and/or leak the detailed of Buffer
Thin information.
Further, the details of the leakage Buffer include:The details of the leakage Buffer include:Let out
The duration that leakage Buffer current forwarding stages, the memory address for leaking Buffer, leakage Buffer are allocated out with
And leakage Buffer be allocated when system time.
Further, described information display unit, be additionally operable to set miscue switch, when detect Buffer leak
When, automatic printing prompting.
Beneficial effects of the present invention are:The duration being allocated out by a kind of automatic monitoring Buffer, judge to work as
Preceding Buffer is slowly let out with the presence or absence of slowly leakage so as to help to develop effectively to orient to exist in a short time with tester
The Buffer of leakage, lifting means complete machine stability and reliability.
Brief description of the drawings
Fig. 1 is methods described flow chart of the embodiment of the present invention;
Fig. 2 is described device schematic diagram of the embodiment of the present invention;
Fig. 3 is data flow access device schematic diagram described in the embodiment of the present invention;
Fig. 4 is the schematic diagram that methods described of the embodiment of the present invention is implemented in equipment.
Embodiment
For technical scheme is more clearly understood, the present invention is described in further details in conjunction with accompanying drawing:
Embodiment 1
As shown in figure 1, the embodiments of the invention provide the localization method that a kind of buffering area slowly leaks, methods described bag
Include:
Step 101, obtain system time when buffering area Buffer is allocated, and will be described allocated when system time
Preserve into corresponding Buffer structures;
One step 102, setting time-out time;Here time-out time according to the traffic performance of current hosts determine,
Empirical value can be drawn by experiment in practical application, typically can be 10-20 minutes.
Step 103, a Detection task is created, periodically traversal detection is carried out to each Buffer that distributed;Detecting
When obtain the duration that each Buffer is allocated out, if duration for being allocated out of the Buffer is more than setting
Time-out time, then the Buffer is calculated as leaking and Buffer and preserved.If the duration that Buffer is allocated out is small
In the time-out time of setting, then any processing is not made.
Obtaining the duration that each Buffer is allocated out in detection specifically includes:When obtaining system when detecting
Between, it is poor that the system time when Buffer preserved in system time when detecting and the Buffer structures is allocated is made, and obtains
The duration that the Buffer is allocated out.
Methods described also includes:Debug command is added, leakage Buffer number is checked and/or leaks the detailed of Buffer
Information.The details of the leakage Buffer include:With leaking the current internal memories for forwarding the stage, leaking Buffer of Buffer
The system time when duration and leakage Buffer that location, leakage Buffer are allocated out are allocated.
Methods described also includes setting miscue to switch, when detecting Buffer leakages, automatic printing prompting.
Embodiment 2
As shown in Fig. 2 the embodiments of the invention provide the positioner that a kind of buffering area slowly leaks, described device bag
Include:
Time acquisition unit 201, it is allocated for obtaining system time when buffering area Buffer is allocated, and by described
When system time preserve into corresponding Buffer structures;
Threshold sets unit 202, for setting a time-out time;
Detection task unit 203, for creating a Detection task, periodicity traversal is carried out to each Buffer that distributed
Detection;The duration that Buffer is allocated out is obtained, if the duration that Buffer is allocated out is more than the super of setting
When the time, then the Buffer is calculated as leaking and Buffer and preserved.
The time acquisition unit 201 is specifically used for, when detection has each distributed Buffer, when obtaining system when detecting
Between, it is poor that the system time when Buffer preserved in system time when detecting and Buffer structures is allocated is made, and obtains
The duration that Buffer is allocated out.
Described device also includes information display unit 204, for adding debug command, checks leakage Buffer number
And/or leakage Buffer details.The details of the leakage Buffer include:Leak the current forwarding ranks of Buffer
When the duration and leakage Buffer that section, leakage Buffer memory address, leakage Buffer are allocated out are allocated
System time.Described information display unit 204, it is additionally operable to set miscue to switch, when detecting Buffer leakages, from
Dynamic print prompt.
Embodiment 3
The embodiment of the present invention is progressive that the present invention is carried out exemplified by method of the present invention to be implemented on network devices
Illustrate:
A simple illustration is carried out to the standard forwarding model of the network equipment first, as shown in figure 3, data flow is by setting
Standby one of inbound port enters the network equipment, then by routing table look-up, finds last purpose exit port, and from correspondingly
Purpose exit port send, complete once complete forwarding process.In the process, the complete of the network equipment can be turned
Hair path is divided into the following forwarding stage:
DRV_INPUT driving inputs
LINK_INPUT links input
FORWARD_INPUT forwarding inputs
FORWARD_ROUTER forwarding routes
FORWARD_OUTPUT forwarding outputs
LINK_OUTPUT links export
DRV_OUTPUT driving outputs
Current Buffer distribution state include having distributed with it is unallocated.
Based on the design of above-mentioned basic software, a data message is completed once in the network device here complete
Forwarding process is described in detail, as shown in figure 4, message, when forwarding beginning, driving can be available from the application of Buffer ponds in advance
Buffer be used to receive data flow, and Buffer distribution state is set to have distributed;After message enters device Host, number
Preserved according to being copied to by DMA (Direct Memory Access, direct memory access) in Buffer, software can be set currently
The Buffer forwarding stage is DRV_INPUT and completes subsequent treatment, then delivers data link layer and carries out packet parsing and its
He is handled.The now corresponding current Buffer forwarding stage can be changed into LINK_INPUT states from DRV_INPUT.According to route
Table look-up and find purpose exit port, message is forwarded from purpose exit port.In whole forwarding process, with Message processing rank
The change of section, corresponding current Buffer forwarding stage can also occur to change accordingly, until message is sent to thing from driving
Circuit is managed, Buffer is recovered to Buffer ponds, and the distribution state for being correspondingly arranged the Buffer is unallocated.
Based on above-mentioned forwarding process, it is desirable to which realization is effectively monitored to the slow leakage problems of Buffer, specific real
Existing step is as follows:
Increase time member in Buffer structures, for recording system time when Buffer is allocated.When this
When Buffer is allocated, takes present system time and preserve into the time member fields of Buffer structures.Time member fields
Type must be 64, to ensure that variable bit wide is as big as possible, avoid occurring in a practical situation the situation of variate-value upset.
A Detection task, for being periodically detected to allocated Buffer, detection cycle are created in systems
It can determine according to the actual requirements, the cycle, more big then overhead was smaller, but it is poor to detect real-time;Cycle, smaller then effect was anti-
It.When each Detection task is initiated, current system time is first obtained, whole all of Buffer ponds is then begun stepping through and has divided
The Buffer matched somebody with somebody, to each allocated Buffer, then being divided of being preserved in Buffer structures is subtracted with current system time
The system time of timing, obtain the duration that Buffer is allocated out.
One Buffer of setting is allocated out the time-out time of duration, and this value is according to the spy of device forwards system
Depending on property, such as 600S, that is, it is interpreted as in current network equipment system, the duration that a Buffer is allocated out surpasses
Spend 10 minutes all not to be released, then it is assumed that this Buffer is possible to have leaked.
Compared with the duration being allocated out for having distributed Buffer and the time-out time of setting, if continued
Between be more than the time-out time of setting, then it is assumed that the Buffer has been leaked, and the Buffer is calculated as leaking Buffer and preserved, right
Leakage Buffer statistical be:Counted according to the leakage Buffer current forwarding stages, i.e. each forwarding rank of statistics
The existing leakage Buffer of section number, so when being checked by debug command to the information for leaking Buffer, not only
It can be seen that leakage Buffer total number, can also get information about very much the individual of each forwarding stage leakage Buffer
Number.Further, leakage Buffer queues are created according to the leakage Buffer current forwarding stages:Same forwarding rank will be in
The leakage Buffer of section joins the team successively, so when checking leakage Buffer details by debug command, it is possible to specify
Check some forwarding stage existing leakage Buffer situation.
More optimize, when Detection task is initiated each time, the leakage Buffer in all forwarding stages queue is traveled through, by
Buffer through being discharged back into beyond time-out time but again Buffer ponds goes out team, and letting out in the corresponding forwarding stage from the queue
Leak and carry out subtracting 1 operation in Buffer statistical magnitude.
In embodiments of the present invention, tester can leak Buffer number and every by debug command real time inspection
Individual leakage Buffer details, the details of the leakage Buffer include:Leak Buffer current forwarding stages,
System time and leakage Buffer when leakage Buffer memory address, leakage Buffer are allocated be allocated out it is lasting when
Between etc..Tester can be obtained no leakage Buffer by debug command and be particularly shown information, described to be particularly shown letter
The content and form of breath do not limit here, and tester can selectively check leakage Buffer's according to the demand of oneself
Total number, or each more detailed leakage Buffer current forwarding stage, leakage Buffer memory address, leakage
Duration that system time and leakage Buffer when Buffer is allocated are allocated out etc..
Leakage Buffer's is detailed existing for Buffer number of each forwarding stage existing leakage, some forwarding stage
Thin information etc..
More excellent, if it is considered that the real-time to report an error, can leak out the current letter that will leak out Buffer in Buffer
Automatic printing prompting is ceased, the content for being particularly shown information of automatic printing prompting can voluntarily be set according to the demand of tester
It is fixed.Print prompt leakage Buffer number can be selected, or includes the current forwarding ranks of leakage Buffer in further detail
The information such as section, this mode are applied to require higher scene to the stability of a system, and concrete implementation mode is very simple, here
No longer it is described in detail.
It can realize what fast and effective positioning slowly leaked with the presence or absence of Buffer on network devices by above method
Problem, and this method pertains only to the reading to Buffer states, application and release operation increase that will not be to Buffer be any
Expense, any influence will not be also brought to forwarding performance.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. the localization method that a kind of buffering area slowly leaks, it is characterised in that methods described includes:
Obtain system time when buffering area Buffer is allocated, and will be described allocated when system time preserve to corresponding
In Buffer structures;
A Detection task is created, periodically traversal detection is carried out to each Buffer that distributed, obtained in detection each
The duration that Buffer is allocated out, if the duration that the Buffer is allocated out is more than the time-out of setting
Between, then the Buffer is calculated as leaking Buffer and preserved.
2. according to the method for claim 1, it is characterised in that described to obtain each Buffer in detection and be allocated out
Duration, specifically include:System time during detection is obtained, will be protected in system time when detecting and the Buffer structures
It is poor that system time when the Buffer deposited is allocated is made, and obtains the duration that the Buffer is allocated out.
3. according to the method for claim 1, it is characterised in that methods described also includes:Debug command is added, checks leakage
Buffer number and/or the details for leaking Buffer.
4. according to the method for claim 3, it is characterised in that the details of the leakage Buffer include:Leakage
Current Buffer forwarding stage, leak duration and leakage that Buffer memory address, Buffer are allocated out
System time when Buffer is allocated.
5. according to the method for claim 3, it is characterised in that methods described also includes:Set miscue to switch, work as inspection
When measuring Buffer leakages, automatic printing prompting.
6. the positioner that a kind of buffering area slowly leaks, it is characterised in that described device includes:
Time acquisition unit, for obtain buffering area Buffer be allocated when system time, and will be described allocated when be
The system time is preserved into corresponding Buffer structures;
Threshold sets unit, for setting a time-out time;
Detection task unit, for creating a Detection task, periodically traversal detection is carried out to each Buffer that distributed;Obtain
The duration that Buffer is allocated out is taken, if the duration that Buffer is allocated out is more than the time-out time of setting,
Then the Buffer is calculated as leaking Buffer and preserved.
7. device according to claim 6, it is characterised in that the time acquisition unit is specifically used for, and detection is each
When distributing Buffer, system time during detection is obtained, by what is preserved in system time when detecting and Buffer structures
It is poor that system time when Buffer is allocated is made, and obtains the duration that Buffer is allocated out.
8. device according to claim 6, it is characterised in that described device also includes:
Information display unit, for adding debug command, check leakage Buffer number and/or leak Buffer detailed letter
Breath.
9. device according to claim 8, it is characterised in that the details of the leakage Buffer include:Leakage
Duration that current Buffer forwarding stage, the memory address for leaking Buffer, leakage Buffer are allocated out and
Leak system time when Buffer is allocated.
10. device according to claim 8, it is characterised in that described information display unit, be additionally operable to set miscue
Switch, when detecting Buffer leakages, automatic printing prompting.
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Cited By (3)
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CN109062781A (en) * | 2018-06-22 | 2018-12-21 | 北京星网锐捷网络技术有限公司 | A kind of message buffer management method and device |
CN113495832A (en) * | 2020-04-05 | 2021-10-12 | 杭州迪普科技股份有限公司 | Cache region leakage detection system and method thereof |
CN113672416A (en) * | 2021-07-27 | 2021-11-19 | 杭州迪普科技股份有限公司 | Method and device for positioning reasons of memory resource leakage |
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Address after: 610041 15-24 floor, 1 1 Tianfu street, Chengdu high tech Zone, Sichuan Applicant after: Maipu Communication Technologies Co., Ltd. Address before: No. 16, nine Xing Avenue, Chengdu high tech Zone, Sichuan Province Applicant before: Maipu Communication Technologies Co., Ltd. |
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