CN102508681A - Method and system for patching without interrupting service in multi-core system - Google Patents
Method and system for patching without interrupting service in multi-core system Download PDFInfo
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- CN102508681A CN102508681A CN2011103532209A CN201110353220A CN102508681A CN 102508681 A CN102508681 A CN 102508681A CN 2011103532209 A CN2011103532209 A CN 2011103532209A CN 201110353220 A CN201110353220 A CN 201110353220A CN 102508681 A CN102508681 A CN 102508681A
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Abstract
The embodiment of the invention discloses a method and a system for patching without interrupting a service in a multi-core system. The method and the system are used for patching operation over the multi-core system. The method in the embodiment of the invention comprises the following steps that: a control core accesses a backup code segment to finish the patching operation over the backup code segment; the control core sequentially transmits an interrupt signal to all service cores; each service core responds to the interrupt signal, and modifies a translation lookaside buffer (TLB) mapping relationship so as to run in the patched backup code segment; and if detecting that all service cores finish modification of the TLB mapping relationships, the control core accesses a main code segment to finish the patching operation over the main code segment. According to the method in the embodiment of the invention, the control core is not required to execute the patching operation under the condition that all the service cores are in a synchronous patching waiting state, so that the service is not interrupted by the patching operation, time for the patching operation can be shortened, and the performance of the system and user experiences are improved.
Description
Technical field
The present invention relates to field of computer technology, relate in particular to the patch method and the system of multiple nucleus system non-interrupting service.
Background technology
Multi-core technology has become the new direction of processor technical development, and the target of main flow processor manufacturer all is a polycaryon processor at present.Operating system adopts asymmetric multiprocessing mode mostly on the polycaryon processor hardware platform at present, promptly adopts the mode of sharing code segment to move.
Hot patch (hereinafter is referred to as patch) is the general requirement of telesoftware, on-the-fly modifies program when being used for moving in system, as the defective of carrying out system testing or repairing software, and does not influence the operation of regular traffic.Existing multiple nucleus system is generally examined a nuclear in the multi-core CPU as control; Remaining other nuclears are examined as professional, and carry out the patch operation by control nuclear, and general patching technology is to carry out through the mode that function is replaced; Be specially: control nuclear generates patch file with the patch new function; Being loaded into patch file in the physical memory address space that is replaced function operation through loading tool, when patch is operated, is jump instruction with article one modifying of order that is replaced function at last; Jump to patch new function address, thereby reach the purpose of patch.
Share at multinuclear under the environment of code segment, also can carry out even run succeeded immediately following the instruction jump instruction after jump instruction, this instruction is called the jump delay slot order; When patch is operated; Article one modifying of order that need will be replaced function is jump instruction, jumps to patch new function address, needs to be replaced the second instruction of function simultaneously; Just the jump delay slot order is revised as non-operation instruction.Promptly share under the code segment environment at multinuclear; The patch action need is revised two instructions simultaneously, and when actual patch is operated, is jump instruction if just will be replaced article one modifying of order of function; At this moment have that a professional nuclear carries out article one instruction be the instruction in the patch new function; The second instruction but is the instruction that is replaced in the function, will cause logical miss, mistake occurs.
In the prior art, when operating in order to ensure patch, professional nuclear can not implement and be replaced function; Control nuclear is when carrying out the patch installing operation for professional nuclear; To require professional nuclear to be in the patch waiting status, not carry out professional processing, and to be checkedly measure all business nuclear and all be in after the patch waiting status; Carry out subsequent operation again, thereby guarantee can not implement the function that is replaced.After patch operation completion, professional nuclear just begins to recover operation flow.
The researchist finds that under study for action there is following defective in multiple nucleus system patch operation of the prior art: control nuclear is given the patch installing of professional nuclear, must wait until that all business nuclear all stops to carry out business operation; Be in synchronous waiting status; Control nuclear carries out state-detection (confirming that promptly all business nuclear all is in synchronous patch waiting status) needs the long time of cost, and particularly under the big situation of portfolio, the time of state-detection will be longer; And all business nuclear all must stop business operation; Be in synchronous waiting status, cause service disconnection, reduced user experience.
Summary of the invention
The embodiment of the invention provides a kind of patch method and system of multiple nucleus system non-interrupting service, is used for the patch operation of multiple nucleus system.
Method in the embodiment of the invention comprises:
Control nuclear visit backup code section is accomplished the patch operation of backup code section;
Control nuclear is authorized to all business successively and is sent look-at-me;
Professional nuclear response look-at-me is revised bypass conversion buffered TLB mapping relations, makes professional nuclear in the backup code section operation of patch;
If detect the modification that all professional nuclears have been accomplished the TLB mapping relations, control nuclear visit main code section is accomplished the patch operation of main code section.
System in the embodiment of the invention comprises:
Control nuclear is used to visit the backup code section, accomplishes the patch operation of backup code section; And authorize to all business successively and send look-at-me; If detect the modification that all professional nuclears have been accomplished the TLB mapping relations, then visit main code section, accomplish the patch operation of main code section;
Professional nuclear is used to respond control and authorizes the look-at-me of sending, and revises bypass conversion buffered TLB mapping relations, makes professional nuclear in the backup code section operation of patch.
Can find out that from above technical scheme the embodiment of the invention has the following advantages:
Through earlier the backup code section being carried out the patch operation; And authorize to all business successively and give look-at-me, make all professional nuclears revise after bypass conversion buffered (TLB, Translation Lookaside Buffer) mapping relations; Control nuclear visits again main code section; Accomplish the patch operation of main code section, make control examine under the situation that need not be in synchronous patch waiting status at all business nuclear and carry out the patch operation, the patch operation can not produce service disconnection; And can shorten the time that the patch operation consumes, improve the performance and the user experience of system.
Description of drawings
Fig. 1 is a synoptic diagram of the patch method of multiple nucleus system non-interrupting service in the embodiment of the invention;
Fig. 2 is another synoptic diagram of the patch method of multiple nucleus system non-interrupting service in the embodiment of the invention;
Fig. 3 is a synoptic diagram of the patch system of multiple nucleus system non-interrupting service in the embodiment of the invention;
Fig. 4 is another synoptic diagram of the patch system of multiple nucleus system non-interrupting service in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of patch method and system of multiple nucleus system non-interrupting service; Be used for multiple nucleus system and carry out the patch operation; Make control nuclear need not be in synchronous patch waiting status at all business nuclear and also can accomplish the patch operation; The patch operation does not need interrupting service, and can effectively shorten the time that the patch operation consumes, and has improved the performance of system.
In embodiments of the present invention; With the notion of using main code section and backup code section; Promptly the shared code segment in physical memory address space comprises main code section and backup code section; And this main code section has identical instruction with the backup code section, and business is endorsed with switchover operation between main code section and backup code section.
To describe patch method of the present invention from control nuclear side below, and see also Fig. 1, the embodiment for a kind of patch method of multiple nucleus system non-interrupting service in the embodiment of the invention comprises:
101, control nuclear visit backup code section is accomplished the patch operation of backup code section;
In embodiments of the present invention, under the situation of multiple nucleus system operation, under the situation that promptly professional nuclear moves in the main code section of sharing code segment; Control nuclear is if need carry out the patch operation to sharing code segment; To visit the backup code section, and accomplish the patch operation of backup code section, the patch operation specifically comprises: revise article one instruction that is replaced function in the backup code section and be jump instruction; The second instruction that modification is replaced function is non-operation instruction; And this jump instruction jumps to the patch code section, makes professional nuclear after implementing jump instruction, will continue to carry out the instruction of patch code section, and after executing the patch code section, returns the backup code section.
102, control nuclear is authorized to all business successively and is sent look-at-me;
103, professional nuclear response look-at-me is revised the TLB mapping relations, makes professional nuclear in the backup code section operation of patch;
In embodiments of the present invention, control is checked the backup code section and is carried out will authorizing to all business successively and sending look-at-me after the patch operation, makes professional nuclear response look-at-me, revises the TLB mapping relations, makes professional nuclear in the backup code section operation of patch.Wherein, The TLB mapping relations are meant the mapping relations of the address of the code segment of preserving in the professional nuclear; Be specially the logical memory address of code segment and the corresponding relation of physical memory addresses; Professional nuclear can be so that professional nuclear switches to the backup code section operation of patch from main code section through revising the TLB mapping relations.Wherein, Professional nuclear is revised the TLB mapping relations and is specially: professional nuclear is revised as the logical memory address correspondence physical memory addresses of the main code section of patch with the TLB mapping relations; In embodiments of the present invention, professional nuclear will obtain instruction in the backup code section of patch from physical memory address space when operation; And according to the TLB mapping relations of having preserved, operating instruction in the logical memory address corresponding with the backup code section of patch.
Need to prove that the patch code section is kept in the physical memory address space in embodiments of the present invention, the main code section of sharing in the code segment in the physical memory address space all can be mapped to identical logical memory address through TLB with the backup code section.
104, if detect the modification that all professional nuclears have been accomplished the TLB mapping relations, control nuclear visit main code section is accomplished the patch operation of main code section.
In embodiments of the present invention, control nuclear to all business authorize send look-at-me after, professional nuclear will be revised the TLB mapping relations; Control nuclear is if detect the modification that all professional nuclears have been accomplished the TLB mapping relations; To visit main code section, accomplish the patch operation of main code section, wherein; The flow process of the patch operation of main code section is identical with the flow process of the patch operation of backup code section, repeats no more here.
In embodiments of the present invention, detecting all professional nuclears has accomplished being revised as of TLB mapping relations and detects and in all professional nuclears the TLB mapping relations have been set and revise successful mark.
In embodiments of the present invention, exist professional nuclear not accomplish the modification of TLB mapping relations if control nuclear detects, then after the time period of presetting, control nuclear will be authorized to the business that does not respond look-at-me once more and send look-at-me.
Need to prove; In embodiments of the present invention; After the patch operation of accomplishing main code section, control is endorsed with through sending look-at-me, makes all business nuclear revise the TLB mapping relations; Switch to the main code section operation of patch from the backup code section of patch, be specially: professional nuclear is revised as the logical memory address correspondence physical memory addresses of the main code section of patch with the TLB mapping relations; Perhaps, after the patch operation of accomplishing main code section, do not carry out handoff procedure; All business nuclear is in the backup code section operation of patch; Then need carry out patch when operation next time, business is examined performed code segment as main code section, with another code segment as the backup code section; Carry out embodiment shown in Figure 1, accomplish the patch operation.In actual applications, can confirm according to specific circumstances after main code section being accomplished the patch operation whether need all business nuclear switched on the main code section of patch and move, not do qualification here.
In embodiments of the present invention, through in sharing code segment, comprising main code section and backup code section, make when professional nuclear moves in main code section; If control nuclear need carry out the patch operation to sharing code segment, control is endorsed earlier the backup code section is carried out the patch operation, and making to influence the operation of professional nuclear to the patch operating process of backup code section; The patch operation can not cause service disconnection; And control nuclear will be authorized to all business and send look-at-me, make professional nuclear revise the TLB mapping relations, switch to the backup code section operation of patch at business nuclear after; Control is checked main code section and is carried out the patch operation; To accomplish the patch operation to main code section in the shared code segment and backup code section, the patch method in the embodiment of the invention does not need all business nuclear to be in synchronous patch waiting status, the service disconnection of having avoided the patch operation to produce; Shorten the time that is consumed of patch operation, improved the performance of system and user's experience.
Technical scheme for a better understanding of the present invention sees also Fig. 2, and the patch method for a kind of multiple nucleus system non-interrupting service in the embodiment of the invention comprises:
201, control nuclear visit backup code section is accomplished the patch operation of backup code section;
202, control nuclear is authorized to all business successively and is sent look-at-me;
The similar content that content that step 201 and 202 is described in embodiment illustrated in fig. 2 and middle step 101 embodiment illustrated in fig. 1 and 102 are described repeats no more here.
203, the look-at-me of sending is authorized in professional nuclear response control;
In embodiments of the present invention, control nuclear send look-at-me with authorizing to all business successively after the patch operation of accomplishing the backup code section, and therefore, professional nuclear will respond control and authorize the look-at-me of sending.
In embodiments of the present invention; Comprise the Interrupt Process function in the professional nuclear, professional nuclear response control is authorized after the look-at-me of sending, and will carry out the Interrupt Process function; Accomplish the modification of TLB mapping relations; Wherein, carry out the Interrupt Process function, the flow process of accomplishing the modification of TLB mapping relations is specially the content of step 204 to 208 descriptions.
204, obtain next bar instruction address that current business is carried out;
205, whether judge next bar instruction address in the critical section, if not, then execution in step 206, if then execution in step 208;
Need to prove that in embodiments of the present invention, the critical section is meant with the function that is replaced professional nuclear will judge whether the instruction that current business is carried out is with the instruction in the function that is replaced, mistake occurs to avoid professional nuclear operation.
206, revise the TLB mapping relations;
In embodiments of the present invention, professional nuclear will obtain next bar instruction address that current business is carried out, and judge that whether this next bar instruction address is in the critical section; If this next bar instruction address is not in the critical section; Professional nuclear will be revised the TLB mapping relations, and wherein, professional nuclear is revised the TLB mapping relations and is specially: move in main code section if professional nuclear is current; And the operation of the patch of backup code section is accomplished; Professional nuclear is revised as the logical memory address correspondence physical memory addresses of the backup code section of patch with the TLB mapping relations, makes professional nuclear switch to the operation of backup code section, and control nuclear energy is enough carries out the patch operation to main code section.
207, the TLB mapping relations are set and revise successful mark;
In embodiments of the present invention, professional nuclear will be provided with the TLB mapping relations and revise successful mark after the modification of accomplishing the TLB mapping relations, make control nuclear energy enough confirm through this mark whether professional nuclear has accomplished the modification of TLB mapping relations.
208, interrupt returning.
In embodiments of the present invention, if next bar instruction that the current business that professional nuclear obtains is carried out is in the critical section, professional nuclear returns interruptions, perhaps is provided with after the TLB mapping relations revise successful mark when professional nuclear, and business is examined interruption is returned.
In the present invention; If next bar instruction address that current business is carried out is in the critical section, professional nuclear will be cancelled service disconnection, continue execution command; And when control nuclear detects this business nuclear and does not accomplish the modification of TLB mapping; To after the time period of presetting, authorize to this business once more and send look-at-me, this business nuclear will be operated according to the content of step 203 shown in Figure 2～208.
In embodiments of the present invention, professional nuclear will respond look-at-me, revise the TLB mapping relations; Make control nuclear after the backup code section is accomplished the patch operation, business is endorsed through revising the TLB mapping relations, and switching to, the backup code section of patch continues operation; Make control nuclear in to the process of sharing the code segment patching operation; Professional nuclear need be in order not to be in synchronous patch waiting status interrupting service, can effectively shorten the time that the patch operation consumes, improve the performance of system.
See also Fig. 3, the patch system implementation example for a kind of multiple nucleus system non-interrupting service in the embodiment of the invention comprises:
Control nuclear 301 is used to visit the backup code section, accomplishes the patch operation of backup code section; And authorize to all business successively and send look-at-me; If detect the modification that all professional nuclears have been accomplished the TLB mapping relations, then visit main code section, accomplish the patch operation of main code section;
Professional nuclear 302 is used to respond control and authorizes the look-at-me of sending, and revises bypass conversion buffered TLB mapping relations, makes professional nuclear in the backup code section operation of patch.
In embodiments of the present invention; Control nuclear 301 will be visited the backup code section; Accomplish the patch operation of backup code section; And after the patch operation of backup code section; To authorize to all business successively and send interrupt signal; The interrupt signal of sending is authorized in professional nuclear 302 response controls; Revise bypass conversion buffered TLB mapping relations; Make professional nuclear in the backup code section operation of patch; And control nuclear 301 is after detecting all professional nuclears and having accomplished the modification of TLB mapping relations; To visit main code section, accomplish the patch operation of main code section.
Need to prove, in the patch system in embodiments of the present invention, can comprise a plurality of professional nuclears.
In embodiments of the present invention, control nuclear carries out the patch operation to the backup code section earlier, makes all business nuclear revise the TLB mapping relations through sending look-at-me again; Switch to the backup code section operation of patch; At last, control is checked main code section and is carried out the patch operation, accomplishes sharing the patch operation of code segment; Make control nuclear in to the process of sharing the code segment patching operation; Professional nuclear need be in order not to be in synchronous patch waiting status interrupting service, can effectively shorten the time that the patch operation consumes, improve the performance of system.
System among the embodiment sees also Fig. 4 for a better understanding of the present invention, and the patch system implementation example for a kind of multiple nucleus system non-interrupting service in the embodiment of the invention comprises:
Control among the embodiment as shown in Figure 3 nuclear 301, professional nuclear 302 and with the similar content of description embodiment illustrated in fig. 3, repeat no more here.
Wherein, control nuclear 301 specifically comprises:
Transmitting element 401 is used for authorizing to all business successively sending look-at-me;
In addition, in embodiments of the present invention, control nuclear also comprises:
Detecting unit 403 is used for detecting professional nuclear and whether the TLB mapping relations have been set revise successful mark.
In embodiments of the present invention, professional nuclear 302 specifically comprises:
Acquiring unit 404 is used to obtain next bar instruction address that current business is carried out;
In embodiments of the present invention, examine 302 when the main code section of sharing code segment is moved when business, the backup code section will be visited in the patch unit 402 in the control nuclear 301; Accomplishing the patch of backup code section handles; Wait to accomplish after the patch operation of backup code section, transmitting element 401 will be authorized to all business successively and send look-at-me, and professional nuclear 302 will respond look-at-me; Acquiring unit 404 in the professional nuclear in 302 will obtain next bar instruction address that current business is carried out; And judge that by processing unit next bar instruction address whether in the critical section, if not, then revises the TLB mapping relations; After revising the TLB mapping relations, flag setting unit 406 will be provided with the TLB mapping relations and revise successful mark.Detecting unit 403 in the control nuclear 301 is after transmitting element 401 sends look-at-me; During the business that will detect is examined whether the TLB mapping relations have been set and have revised successful mark; If detect the modification that all professional nuclears have been accomplished the TLB mapping relations; Then, accomplish the patch operation of main code section by patch unit 402 visit main code section.
In embodiments of the present invention; Control nuclear can be through revising the TLB mapping relations after the backup code section is accomplished the patch operation, and switching to, the backup code section of patch continues operation; Make control nuclear in to the process of sharing the code segment patching operation; Do not need interrupting service, can effectively shorten the time that the patch operation consumes, improve the performance of system.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a ROM (read-only memory), disk or CD etc.
More than the patch method and the system of multiple nucleus system non-interrupting service provided by the present invention carried out detailed introduction; For one of ordinary skill in the art; Thought according to the embodiment of the invention; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the patch method of a multiple nucleus system non-interrupting service is characterized in that, comprising:
Control nuclear visit backup code section is accomplished the patch operation of said backup code section;
Said control nuclear is authorized to all business successively and is sent look-at-me;
The said look-at-me of said professional nuclear response is revised bypass conversion buffered TLB mapping relations, makes said professional nuclear in the backup code section operation of patch;
If detect the modification that said all professional nuclears have been accomplished the TLB mapping relations, said control nuclear visit main code section is accomplished the patch operation of said main code section.
2. method according to claim 1 is characterized in that, said method also comprises:
If detect the unmodified TLB mapping relations of professional nuclear, then after the preset time section, control nuclear is authorized to said business and is sent look-at-me.
3. method according to claim 1 is characterized in that, the said look-at-me of said professional nuclear response is revised bypass conversion buffered TLB mapping relations, comprising:
Said professional nuclear obtains next bar instruction address that current business is carried out;
Judge that whether said next bar instruction address is in the critical section;
If not, then revise the TLB mapping relations.
4. method according to claim 3 is characterized in that, said modification TLB mapping relations comprise:
Said professional nuclear is revised as the logical memory address correspondence physical memory addresses of the backup code section of patch with the TLB mapping relations.
5. according to claim 3 or 4 described methods, it is characterized in that, also comprise after the said modification TLB mapping relations:
The TLB mapping relations are set revise successful mark.
6. method according to claim 1 is characterized in that, saidly detects said all professional nuclears and has accomplished being revised as of TLB mapping relations and detect and in said all professional nuclears the TLB mapping relations have been set and revise successful mark.
7. the patch system of a multiple nucleus system non-interrupting service is characterized in that, comprising:
Control nuclear is used to visit the backup code section, accomplishes the patch operation of said backup code section; And authorize to all business successively and send look-at-me; If detect the modification that said all professional nuclears have been accomplished the TLB mapping relations, then visit main code section, accomplish the patch operation of said main code section;
Professional nuclear is used to respond said control and authorizes the look-at-me of sending, and revises bypass conversion buffered TLB mapping relations, makes said professional nuclear in the backup code section operation of patch.
8. system according to claim 7 is characterized in that, said control nuclear specifically comprises:
Transmitting element is used for authorizing to all business successively sending look-at-me;
The patch unit is used to visit the backup code section, accomplishes the patch operation of said backup code section, and is used for then visiting main code section if detect the modification that said all professional nuclears have been accomplished the TLB mapping relations, accomplishes the patch operation of said main code section.
9. according to claim 7 or 8 described systems, it is characterized in that said control nuclear also comprises:
Detecting unit is used for detecting professional nuclear and whether the TLB mapping relations have been set revise successful mark.
10. system according to claim 7 is characterized in that, said professional nuclear specifically comprises:
Acquiring unit is used to obtain next bar instruction address that current business is carried out;
Processing unit is used to judge that said next bar instruction address whether in the critical section, if not, then revises the TLB mapping relations;
Flag setting unit is used to be provided with the TLB mapping relations and revises successful mark.
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| CN201110353220.9A CN102508681B (en) | 2011-11-09 | 2011-11-09 | Method and system for patching without interrupting service in multi-core system |
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| WO2016115975A1 (en) * | 2015-01-20 | 2016-07-28 | 中兴通讯股份有限公司 | Method and device for hotpatch of cpu having mips architecture |
| CN108108202A (en) * | 2016-11-23 | 2018-06-01 | 阿里巴巴集团控股有限公司 | A kind of hot-plug method and device |
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| CN101561764A (en) * | 2009-05-18 | 2009-10-21 | 华为技术有限公司 | Patching method and patching device under multi-core environment |
| WO2011116672A1 (en) * | 2010-03-26 | 2011-09-29 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for patching shared code segment |
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| CN101561764A (en) * | 2009-05-18 | 2009-10-21 | 华为技术有限公司 | Patching method and patching device under multi-core environment |
| WO2011116672A1 (en) * | 2010-03-26 | 2011-09-29 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for patching shared code segment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016115975A1 (en) * | 2015-01-20 | 2016-07-28 | 中兴通讯股份有限公司 | Method and device for hotpatch of cpu having mips architecture |
| CN108108202A (en) * | 2016-11-23 | 2018-06-01 | 阿里巴巴集团控股有限公司 | A kind of hot-plug method and device |
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