CN100527661C - Method and system for realizing multi-clock synchronization - Google Patents
Method and system for realizing multi-clock synchronization Download PDFInfo
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- CN100527661C CN100527661C CNB2006101270465A CN200610127046A CN100527661C CN 100527661 C CN100527661 C CN 100527661C CN B2006101270465 A CNB2006101270465 A CN B2006101270465A CN 200610127046 A CN200610127046 A CN 200610127046A CN 100527661 C CN100527661 C CN 100527661C
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Abstract
This method solves the not synchronizing problem of the system time of all operating system (OP) of the server applying ATCA standard. It can be used in the server system applying advanced telecomm calculation structure standard. Its steps are: (1) The single board obtains the server system time from the system management module (2) the single board sets this time as the system time of this board. A system to realize this method is presented as well. This invention is used to realize system time synchronization between all OPs in systems of applying the ATCA standard.
Description
Technical field
The present invention relates to networking technology area, relate in particular to a kind of synchronous method and system of clock for a long time that realize.
Background technology
At present, on the network for a long time clock be the problem that the user was concerned about synchronously always, in order to address this problem, agreement when having released a plurality of networks school, for example, Time Protocol (RFC-868) is a kind of clock protocols, just can keep temporal each other synchronous as long as the clockwork on the network meets this agreement, and it only is be accurate to second level synchronous; Network Time Protocol (NTP, Network Time Protocol) (RFC-1305) also be a kind of clock protocols, it is improved clock protocols on Time Protocol basis, by Internet the some of appointment on the network for providing the clock source of time service service, the user are linked to each other, allow their mutual calibrations to improve accuracy, can also use to all users on the network as the standard time simultaneously, as long as meeting this agreement, the clockwork on the network also can keep temporal each other synchronous, its accuracy is also more accurate than second, and has increased the estimation of network delay amount.
Using now maximum is Network Time Protocol, utilizes this agreement to realize that clock mainly contains three kinds of modes synchronously for a long time: in wireless clock, time server and the local area network (LAN) synchronously.No matter which kind of mode realizes Network Time Protocol, and its mode of operation all can be selected, and mainly also has three kinds: master/passive symmetric pattern, Client and broadcast mode.
Along with the increase of telecommunications industry to the high-performance server demand, proposed at present to give the server that is applied in telecommunications industry to formulate the standard of an advanced telecommunication computing structure (ATCA, Advanced TelecommunicationsComputing Architecture).By a system management module (SMM, System Management Module) the whole machine frame of unified management, can move an operating system based on the server of ATCA standard in each veneer, also can be by operating system of a plurality of veneers operations.
In actual applications, move an independently operating system on general each veneer of server based on the ATCA standard, so a plurality of the operation system clocks occurred.Each the operation system clock is all managed independently at present, does not accomplish truly that a plurality of the operation system clocks are synchronous.Fig. 1 has provided a structural representation that meets the server of ATCA standard, and referring to Fig. 1, system management module and Baseboard Management Controller (BMC, Baseboard Management Controller) are finished management and control to all devices on the veneer jointly.Basic input output system (BIOS on the veneer, Basic Input Output System) and cmos memory (CMOS, Complementary Metal OxideSemiconductor) finish management and control jointly to system start-up on the veneer and system time.CMOS is a read-write RAM chip, is a kind of battery-powered memory that uses in present most computer, and some configurations that in store current computer system start-up needs comprise the system for computer time.
In the prior art, before each veneer os starting based on the ATCA framework, from CMOS, be written into earlier the time initial value, behind the veneer os starting, the interrupt signal of beating with the timer of veneer of single board system clock is a benchmark, revise the single board system time if desired, can in the BIOS start-up course, enter the time of the configurator modification CMOS of BIOS, the initial value that changes the veneer operating system loading system time changes the system time of veneer, also can directly revise the system time of veneer behind os starting, this mode has also changed the time of CMOS indirectly.
In sum, in a plurality of veneers that prior art is managed based on the server of ATCA standard, each single board system time is managed independently, do not consider each single board system between the time synchronously, must cause the professional fiducial time on a plurality of single board systems inconsistent, the system time that meets each operating system that the server of ATCA standard manages can't carry out some comparisons or interoperability, so in the prior art, can't be realized synchronously.
Summary of the invention
The invention provides a kind of synchronous method and system of clock for a long time that realize, in order to solve prior art in the server system that meets the ATCA standard, the system time of each operating system can't be realized synchronous problem.
The inventive method is applied to meet the server system of advanced telecommunication computing structure standard, and the method comprising the steps of:
A, veneer obtain the server system time from system management module;
B, described server system time of veneer are set to the single board system time.
Described steps A is specially:
Before A1, the veneer os starting, the basic input output system of veneer is obtained the server system time from system management module.
Described steps A 1 specifically comprises step:
The basic input output system of A1-1, veneer is sent request, and the system time of the system management module send server of request server is given described veneer;
A1-2, described system management module send the system time of described server to the basic input output system of described veneer;
The basic input output system of A1-3, described veneer is kept at the system time of described server in the internal memory of described veneer.
Described step B is specially:
When B1, veneer os starting, the described server system time is set to the single board system time.
Described step B1 is specially:
During the veneer os starting, the operating system of veneer is obtained the system time of server from internal memory, and this time is set to the single board system time.
Described steps A is specially:
Behind A2, the veneer os starting, the finger daemon in the veneer obtains the server system time from system management module.
Also comprise step before the described steps A 2:
A2-0, judge that finger daemon sends the time obtain the request of server system time and whether arrives, if, execution in step A2, otherwise continue execution in step A2-0.
Described steps A 2 specifically comprises step:
Behind A2-1, the veneer os starting, finger daemon sends the server system time request of obtaining to system management module;
A2-2, described system management module send the described server system time to described veneer.
Described step B is specially:
The operating system of B2, described veneer is upgraded the described single board system time according to this time.
Also comprise step before the described step B2:
B2-1, judge whether to receive the system time of described server, if, then carry out step D4, otherwise, carry out step D2;
B2-2, described finger daemon wait for that described system management module issues the response of the system time of server;
B2-3, judge that finger daemon waits for that whether the time of described response surpass maximum latency, if, then carry out step C, otherwise, carry out step D2;
B2-4, the system time of described server is stored in the internal memory of veneer.
Described method also comprises step:
Behind C, the veneer os starting, the finger daemon in the veneer obtains the server system time from system management module;
The operating system of D, described veneer is upgraded the described single board system time according to this time.
Also comprise step before the described step C:
C0, judge that finger daemon sends the time obtain the request of server system time and whether arrives, if, execution in step C, otherwise continue execution in step C0.
Also comprise step before the described step D:
D1, judge whether to receive the system time of described server, if, then carry out step D4, otherwise, carry out step D2;
D2, described finger daemon wait for that described system management module issues the response of the system time of server;
D3, judge that finger daemon waits for that whether the time of described response surpass maximum latency, if, then carry out step C, otherwise, carry out step D2;
D4, the system time of described server is stored in the internal memory of veneer.
Described step C specifically comprises step:
Behind C1, the veneer os starting, finger daemon sends the server system time request of obtaining to system management module;
C2, described system management module send the described server system time to described veneer.
System of the present invention comprises system management module and veneer, and described veneer comprises basic input-output system unit, memory cell and operating system unit;
Described basic input-output system unit is used for before the os starting of described operating system unit, obtains the server system time from described system management module;
Described memory cell is used to store the described server system time;
Described operating system unit is used for obtaining the described server system time from described memory cell, and this time is set to the single board system time.
Described veneer also comprises:
The finger daemon unit is used for obtaining the server system time from described system management module, and described server time is stored in the memory cell.
Described finger daemon unit comprises:
First judging unit, be used for according to predetermined cycle time, whether the time that judgement is obtained the request of server system time to described system management module transmission arrives, and when arrive in cycle time, asks described system management module send server system time to give described veneer;
Second judging unit is used to judge whether to receive the response of described system management module send server system time, if, then the described server system time is stored in the described memory cell, otherwise, wait for described response;
Whether the 3rd judging unit is used to judge the time of waiting for described response above maximum latency, if then Request System administration module send server system time is given described veneer, otherwise, wait for described response.
The present invention program, in each single board system that the server that meets the ATCA standard is managed, Network Time Protocol is introduced in the ATCA server, go to realize that by the inter-sync mode of the local area network (LAN) of NTP each system time is synchronous, before the veneer os starting, the BIOS of each veneer obtains the system time of server from the system management module of server by the IPMB bus, and this time be set to the initial value of single board system time, tentatively guaranteed the initial value of each single board system time and server system time synchronously; By on each veneer, finger daemon being set, behind the veneer os starting, veneer periodically obtains the system time of server from the system management module of server by finger daemon, and according to this renewal single board system time time, further guaranteed the synchronous of each single board system time and server system time, the system time that has solved each operating system that meets the ATCA server in the prior art can't be realized synchronous problem;
In addition, the running of finger daemon of the present invention is not subjected to the influence of operating system of the system management module of server, the system management module of server is handled the request of described finger daemon by out-band method, even the operating system of system management module not operation is got up, veneer still can obtain the system time of server, makes the influence that is not subjected to the operating system of server synchronously of each single board system time.
Description of drawings
Fig. 1 meets the structural representation of the server of ATCA standard for prior art;
Fig. 2 is the schematic flow sheet of the inventive method;
Fig. 3 is the schematic flow sheet of the inventive method specific embodiment;
Fig. 4 is the structural representation of system of the present invention;
Fig. 5 is the structural representation of system of the present invention specific embodiment.
Embodiment
Overall thought of the present invention is, before single board system starts, the BIOS of veneer obtains the system time of server from the system management module of server by Intelligent Platform Management Bus, this time of the operating system of veneer is set to the single board system time, thereby has tentatively guaranteed the synchronous of each system time; After single board system started, the finger daemon of veneer periodically obtained the system time of server from the system management module of server, and the operating system of veneer is upgraded the described single board system time according to this time, had further guaranteed the synchronous of each system time.
Referring to Fig. 2, the embodiment of the inventive method may further comprise the steps:
Before S201, the veneer os starting, the basic input output system of veneer is obtained the server system time from system management module;
Wherein, described basic input output system is obtained the server system time by Intelligent Platform Management Bus from system management module;
When S202, veneer os starting, the described server system time is set to the single board system time.
Wherein, described server has been introduced Network Time Protocol, and the synchronous mode in the employing local area network (LAN) realize described single board system time and described server system time synchronously, so, local area network (LAN) is made of the system management module and the described veneer of described server, the system management module of described server is the time source server, each veneer is a client, adopt the pattern of client/server, the system time of veneer can only be synchronous by the system time of system management module, and can not reverse sync, avoided occurring chaotic synchronously;
Because every veneer all is such acquisition time, their time reference is the same, but also can be regularly and the time calibration of system management module, so has guaranteed that the system time of all veneers is synchronous;
In addition, user for system management module, can login the system time that this system management module is revised its server by the mode of serial ports or Telnet, can also go calibration by the standard time on the system time of server and the network and revise by Internet.
Fig. 3 is the flow chart of an embodiment of the inventive method, referring to Fig. 3, realizes that the concrete steps of the inventive method embodiment are as follows:
Before S301, the veneer os starting, the basic input output system of veneer is to the system time request of the system management module send server of server;
The system time of S302, described system management module send server is given described veneer;
S303, judge whether to receive the system time of described server, if, execution in step S304 then, otherwise, execution in step S301;
S304, described system time is stored in the internal memory of described veneer;
S305, when the os starting of described veneer, the operating system of described veneer is obtained the described server system time from described internal memory, this time is set to the initial value of described single board system time.
Wherein, CMOS canned data on each veneer no longer comprises temporal information, that is to say that the temporal information that needs when BIOS starts is to send request by the IPMB bus to system management module, be handed down to BIOS by system management module response and the system clock of oneself, this meets the IPMB agreement.Because the clock that obtains of each BIOS all obtains from system management module, so the system clock of each veneer remains the consistency with the clock of described system management module.The system time initial value that is written into during os starting on the veneer is the clock that obtains of BIOS just, so guaranteed the time synchronized on each veneer basically.
But through behind the above-mentioned several steps, can not guarantee that each system time is synchronous forever, because beating of system clock is that interrupt signal with timer is a benchmark, may after operation a period of time veneer and system management module appear, or the situation that asynchronism(-nization) goes on foot between the veneer, such as the battery has run down or timer is not-time on certain veneer, the clock of this veneer certainly just and the asynchronism(-nization) of system management module and other veneer go on foot.Even and the same model of timer chip on each veneer, its interrupt signal is sent frequency and can not be guaranteed in full accord, may have difference through long-play, go to guarantee the synchronism of each system time, specifically comprise step so the present invention can also comprise the step of timing verification:
S306, judge that finger daemon sends the time obtain the request of server system time and whether arrives, if, then carry out step S307, otherwise, proceed step S306;
Judged whether to send the time of time request the cycle time that described finger daemon is set when setting up finger daemon according to the user to described system management module, time is less than just continues to wait for and judge whether arrive cycle time, be that finger daemon just sends once request to system management module at set intervals, the Request System administration module issues the server system time to veneer;
Set according to actual needs by the user cycle time wherein.
S307, finger daemon are given veneer to the request of system management module send server system time with Request System administration module send server system time;
Wherein, described system management module is by with the outer described request of mode treatment step S307;
Described out-band method, for the running of the part of server system without operating system, be and the operation of operating system independent that the function mode of this part is called out-band method.Even do not move by the function operating system that out-band method is realized, still can realize these functions;
In the present invention, out-band method is embodied in system management module, the finger daemon that gets up along with the operating system on the veneer, system management module is given in the request of can regularly sending, if this time, the operating system of system management module was not moved, it also can be by handling these requests with outer mode, and the sending system time is given veneer, and this system time is the time of the CMOS on the server.
S308, described system management module send the system time of described server to described veneer;
S309, judge whether to receive the system time of described server, if, then carry out step S312, otherwise, carry out step S310;
S310, described finger daemon wait for that described system management module issues the response of the system time of server;
S311, judge that finger daemon waits for that whether the time of described response surpass maximum latency, if, then carry out step S307, otherwise, carry out step S310;
Because lose when described request message may transmit on the IPMB bus, finger daemon can't obtain time response, so this time, finger daemon need resend the time request.
S312, the system time of described server is stored in the internal memory of veneer;
The operating system of S313, described veneer is obtained the described server system time from described internal memory, and this time is set to the single board system time.
Referring to Fig. 4, realize that system of the present invention comprises: system management module 401 and veneer 402;
Wherein, described veneer 402 comprises basic input-output system unit 4021, memory cell 4022, operating system unit 4023.
Basic input-output system unit 4021, be used for before the os starting of described veneer 402, obtain the system time of the server that described system management module 401 managed by Intelligent Platform Management Bus, and this time is stored in the described memory cell 4022;
The operating system unit 4023 of described veneer is used for obtaining from described memory cell 4022 system time of described server, and this time is set to the initial value of the system time of described veneer 402.
Because beating of system clock is that interrupt signal with timer is a benchmark, may after operation a period of time veneer and system management module appear, or the situation that asynchronism(-nization) goes on foot between the veneer, in order further to guarantee the synchronous of each system time, system of the present invention can also comprise finger daemon unit 4024;
Described finger daemon unit 4024 is used for behind the os starting of described veneer 402, asks the system time of described system management module 401 send servers to give described veneer 402, and this time is stored in the described memory cell 4022.
Wherein, Network Time Protocol is introduced in the server, the server that described system management module 401 is managed meets the ATCA standard, described system management module 401 and described veneer 402 constitute a local area network (LAN), described system management module 401 is time source servers, described veneer 402 is clients, and in this way, the system time of realizing veneer 402 is synchronous with the server system time of system management module 401.
Fig. 5 referring to Fig. 5, realizes that the embodiment of system of the present invention comprises system management module 501 and veneer 502 for a specific embodiment of system of the present invention;
Wherein, described veneer 502 comprises: basic input-output system unit 5021, internal memory 5022, operating system unit 5023;
Described basic input-output system unit 5021, be used for before the os starting of described veneer 502, obtain the system time of the server that described system management module 501 managed by Intelligent Platform Management Bus, and this time is stored in the described internal memory 5022;
The operating system unit 5023 of described veneer be used for obtaining the described server system time from described internal memory 5022, and this time is set to the initial value of the system time of described veneer 502.
Because beating of system clock is that interrupt signal with timer is a benchmark, may after operation a period of time veneer and system management module appear, or the situation that asynchronism(-nization) goes on foot between the veneer, in order further to guarantee the synchronous of each system time, system of the present invention can also comprise finger daemon unit 5024; Described finger daemon unit 5024 is used for after the system start-up of described veneer 502, periodically asks the system time of described system management module 501 send servers to give described veneer 502, and this time is stored in the described internal memory 5022; Wherein said periodicity is meant that finger daemon just sends request to described system management module at set intervals, asks its system time that issues server, and set when setting up finger daemon for the user cycle time wherein, for example 10 seconds or 15 seconds.
Described finger daemon unit 5024 comprises: first judging unit 50241, second judging unit 50242 and the 3rd judging unit 50243;
First judging unit 50241 in the described finger daemon unit 5024, be used to judge whether the system time of Request System administration module 501 send servers arrives for the time of described veneer 502, arrived, then send request, the system time of Request System administration module 501 send servers to described system management module 501;
In addition, veneer can also offer the interface that the user sets described cycle time, by user's setting cycle time according to actual needs;
Described second judging unit 50242, be used to judge whether to receive the response that described system management module 501 sends the system time of described server, if then the system time with described server is stored in the described internal memory 5022, otherwise, continue to wait for described response;
Described the 3rd judging unit 50243, whether the time that is used to judge described wait is above maximum latency, if then send the time request to described system management module 501 again, otherwise 4 continue to wait for described response;
Wherein said maximum latency is set when setting up finger daemon by the user, and veneer can also offer the interface that the user sets described maximum latency, sets described maximum latency according to actual needs by the user.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1, a kind of synchronous method of clock for a long time that realizes is applied to meet the server system of advanced telecommunication computing structure standard, it is characterized in that the method comprising the steps of:
Before A, the veneer os starting, the basic input output system of veneer is obtained the server system time from system management module;
B, veneer single board system time are set to the described server system time.
2, the method for claim 1 is characterized in that, described steps A 1 specifically comprises step:
The basic input output system of A1-1, veneer is sent request, and the system time of the system management module send server of request server is given described veneer;
A1-2, described system management module send the system time of described server to the basic input output system of described veneer;
The basic input output system of A1-3, described veneer is kept at the system time of described server in the internal memory of described veneer.
3, method as claimed in claim 1 or 2 is characterized in that, described step B is specially:
When B1, veneer os starting, the single board system time is set to the described server system time.
4, method as claimed in claim 3 is characterized in that, described step B1 is specially:
During the veneer os starting, the operating system of veneer is obtained the system time of server from internal memory, and the single board system time is set to the system time of server.
5, method as claimed in claim 3 is characterized in that, described method also comprises step:
Behind C, the veneer os starting, the finger daemon in the veneer obtains the server system time from system management module;
The operating system of D, described veneer is upgraded the described single board system time according to this time.
6, method as claimed in claim 5 is characterized in that, also comprises step before the described step C:
C0, judge that finger daemon sends the time obtain the request of server system time and whether arrives, if, execution in step C, otherwise continue execution in step C0.
7, method as claimed in claim 5 is characterized in that, also comprises step before the described step D:
D1, judge whether to receive the system time of described server, if then the system time with described server is stored in the internal memory of veneer, otherwise, carry out step D2;
D2, described finger daemon wait for that described system management module issues the response of the system time of server;
D3, judge that finger daemon waits for that whether the time of described response surpass maximum latency, if, then carry out step C, otherwise, carry out step D2.
8, method as claimed in claim 5 is characterized in that, described step C specifically comprises step:
Behind C1, the veneer os starting, finger daemon sends the server system time request of obtaining to system management module;
C2, described system management module send the described server system time to described veneer.
9, a kind of synchronous system of clock for a long time that realizes is characterized in that comprise system management module and veneer, described veneer comprises basic input-output system unit, memory cell and operating system unit;
Described basic input-output system unit is used for before the os starting of described operating system unit, obtains the server system time from described system management module;
Described memory cell is used to store the described server system time;
Described operating system unit is used for obtaining the described server system time from described memory cell, and the single board system time is set to the described server system time.
10, system as claimed in claim 9 is characterized in that, described veneer also comprises:
The finger daemon unit is used for obtaining the server system time from described system management module, and described server time is stored in the memory cell.
11, system as claimed in claim 10 is characterized in that, described finger daemon unit comprises:
First judging unit, be used for according to predetermined cycle time, whether the time that judgement is obtained the request of server system time to described system management module transmission arrives, and when arrive in cycle time, asks described system management module send server system time to give described veneer;
Second judging unit is used to judge whether to receive the response of described system management module send server system time, if, then the described server system time is stored in the described memory cell, otherwise, wait for described response;
Whether the 3rd judging unit is used to judge the time of waiting for described response above maximum latency, if then Request System administration module send server system time is given described veneer, otherwise, wait for described response.
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| CN101119171B (en) * | 2007-09-14 | 2011-04-06 | 中兴通讯股份有限公司 | Clock synchronous system and method of advanced telecommunication computer system |
| CN101217380B (en) * | 2008-01-18 | 2010-12-08 | 中兴通讯股份有限公司 | An ATCA machine dimensions frame and machine dimensions frame system |
| CN102652407A (en) * | 2009-12-18 | 2012-08-29 | 日本电气株式会社 | Transmission system, transmission device, receiving device, transmission method, and computer program |
| CN102752065B (en) * | 2012-06-29 | 2015-09-09 | 华为技术有限公司 | A kind of method for synchronizing time and system |
| EP3272135A4 (en) * | 2015-03-12 | 2018-11-07 | Startimes Communication Network Technology Co. Ltd | Location based services audio system |
| CN105955910B (en) * | 2016-04-29 | 2018-07-24 | 中国人民解放军国防科学技术大学 | A kind of time service method towards high-density server system of soaring |
| CN106951027A (en) * | 2017-03-29 | 2017-07-14 | 郑州云海信息技术有限公司 | A kind of system and method for the BMC time managements of blade server |
| CN110297518A (en) * | 2019-06-20 | 2019-10-01 | 合肥联宝信息技术有限公司 | A kind of method of time measurement, device, storage medium and electronic equipment |
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