CN103365718A - Thread scheduling method, thread scheduling device and multi-core processor system - Google Patents
Thread scheduling method, thread scheduling device and multi-core processor system Download PDFInfo
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Abstract
The embodiment of the invention provides a thread scheduling method, a thread scheduling device and a multi-core processor system. The thread scheduling method comprises the following steps: by receiving a thread request, according to a preset allocation strategy, allocating a thread to an appointed processing core for execution; setting parameter values of a thread affinity function; binding the thread with the appointed processing core so as to confine the thread only to the appointed processing core for execution. Through the thread scheduling method, the thread scheduling device and the multi-core processor system, inter-core switching between multiple threads is avoided, the thread switching expense is reduced, the thread switching time is shortened, and the multi-thread executing efficiency is enhanced.
Description
Technical field
The present invention relates to computer realm, relate in particular to a kind of thread scheduling method, thread scheduling device and multi-core processor system.
Background technology
At present, the Multi-core technology is widely used in the webserver, needs in the software service platform of powerful parallel processing capability such as being applied to large-scale chatroom, search engine etc.
The Multi-core technology refers in multi-core processor system, carries out simultaneously a plurality of threads in the program of single execution and finishes different work.In multi-core processor system, thread on same arithmetic core or the nonidentity operation core can switch mutually, because thread has the storehouse of oneself, when cross-thread switches, need the information such as save routine counter, context pointer, executing state, register group, so that the time overhead that cross-thread switches is larger.Contrast thread switching time on the arithmetic core and the thread switching time between the nonidentity operation core, as can be known, the expense of switching at expense that thread between the nonidentity operation core switches thread on the same arithmetic core.
The social platform widespread uses such as existing multimedia conferencing, large-scale chatroom the Multi-core technology, but, because the thread between the nonidentity operation core switches, or execution thread number unbalanced on the nonidentity operation core, so that some threads are in blocked state for a long time, voice service can not in time be provided, reduce the user and experience.For example: when the professional thread that enters and withdraw from operation when responsible chatroom was in blocked state for a long time, the request that new application adds the chatroom can not in time obtain carrying out, and causes the user to add failure.
Summary of the invention
The embodiment of the invention provides a kind of thread scheduling method, thread scheduling device and multi-core processor system, solve because the thread between the nonidentity operation core switches consuming time long, or execution thread number unbalanced on the nonidentity operation core, cause professional thread and voice thread can't in time obtain the problem of carrying out.
The purpose of the embodiment of the invention is achieved through the following technical solutions:
A kind of thread scheduling method is applicable to multiple core processing system, and described method comprises:
The receiving thread request;
According to default allocation strategy, the processing core that thread is dispensed to appointment is carried out;
The processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.
A kind of thread scheduling device, described thread scheduling device comprises:
Receiver module is used for the receiving thread request;
The thread distribution module is used for according to default allocation strategy, and the processing core that thread is dispensed to appointment is carried out;
The thread binding module is used for the processing core of described thread and the appointment of described thread distribution module is bound, and can only carry out in the processing core of described appointment to limit described thread.
A kind of multiple core processing system, described system comprises: process core and thread scheduling device at least two, wherein,
Described processing core is used for multithreading and carries out;
Described thread scheduling device is used for the receiving thread request; According to default allocation strategy, the processing core that thread is dispensed to appointment is carried out; The processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.
By a kind of thread scheduling method, thread scheduling device and multi-core processor system are provided in the embodiment of the invention, by the receiving thread request, according to default allocation strategy, the processing core that thread is dispensed to appointment is carried out, the parameter value of thread affinity function is set, the processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.Avoid the internuclear switching of multithreading, reduced the thread handover overhead, shortened thread switching time, promoted the execution efficient of multithreading.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use among the embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disposal system structural drawing of a kind of thread scheduling method of providing in the embodiment of the invention;
Fig. 2 is the process flow diagram of a kind of thread scheduling method of providing in the embodiment of the invention;
Fig. 3 is the process flow diagram of the another kind of thread scheduling method that provides in the embodiment of the invention;
Fig. 4 is the synoptic diagram of the thread scheduling device that provides in the embodiment of the invention;
Fig. 5 is the synoptic diagram of the multi-core processor system that provides in the embodiment of the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Multiple core processing system in the embodiment of the invention, describe as an example of four core processors 120 example, as shown in Figure 1, four CPU nuclears are respectively CPU1, CPU2, CPU3 and CPU4, four CPU nuclears are supported multithreading (Simultaneousmultithreading) technology, thread scheduler 110 is responsible for the receiving thread request, and thread is assigned to the upper execution of physics nuclear.
Embodiment one
The embodiment of the invention one provides a kind of thread scheduling method, and take thread scheduler 110 as example, as shown in Figure 2, the method comprises the steps:
Wherein, thread is dispensed to the execution of designated treatment core multiple implementation, and for example: the processing core in appointment creates thread, perhaps, distributes a thread in the thread pool on the processing core of appointment.
Wherein, the processing core that thread is tied to appointment is moved, and can avoid the frequent switching of thread between a plurality of processing cores, can realize by CPU compatibility (affinity) is set.
In the linux kernel, all threads have a relevant data structure, are called task_struct, wherein with compatibility (affinity) degree of correlation the highest be the cpus_allowed bitmask.This bitmask forms (N is integer) by the N position, and is corresponding one by one with N logic processor in the system.For example: the system with 4 physical cpus can have 4.If be provided with given position for given thread, this thread just can move at relevant CPU so.
Linux kernel API provide certain methods, allows the user can revise bitmask or check current bitmask:
Sched_set_affinity () (being used for revising bitmask) is used for realizing the binding of thread and particular CPU;
Sched_get_affinity () (being used for checking current bitmask) is used for checking the CPU that binds with line;
In the present embodiment, can realize binding with CPU by the parameter value that the sched_set_affinity function is set, for example: when mask parameter was 0010, the processing core of expression binding was CPU3, and this mask parameter can be finished by the mode of artificial setting or program automatic setting.
By a kind of thread scheduling method that provides in the embodiment of the invention one, by the receiving thread request, according to default allocation strategy, the processing core that thread is dispensed to appointment is carried out, the parameter value of thread affinity function is set, the processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.Avoid the internuclear switching of multithreading, reduced the thread handover overhead, shortened thread switching time, promoted the execution efficient of multithreading.
Embodiment two
A kind of thread scheduling method is provided in the present embodiment two, and take thread scheduler 110 as example, as shown in Figure 3, the method comprises the steps:
Wherein, in order to reduce the expense of bringing of thread creation and destruction, each is processed core and has created a thread pool in advance.Since in the present embodiment multiple core processing system need to process a large amount of, the chatroom enters frequently, the chatroom is withdrawed from, the operation of voice conversation, it is a large amount of business operation services that thread pool is set up limited several fixedly thread in advance, reduced creating and the destruction required time of thread, thereby improved thread execution efficient.Thread pool creates and belongs to prior art, for example: a thread pool that creates with the C language under the linux system, thread pool is safeguarded a Task-list, each CThread_worker structure is exactly a mission thread.Follow-up concrete operation can with reference to prior art, not repeat them here.
Wherein, step 303 specifically comprises following three kinds of optional modes:
The type of step 303-A, the described thread request of judgement; According to the type of thread request, the arbitrary processing core that thread is dispensed to corresponding types is carried out;
Perhaps,
The loading condition of step 303-B, statistical treatment core; According to described loading condition, described thread is assigned to the lightest processing core of load carries out;
Perhaps,
The type of step 303-C, the described thread request of judgement, and the loading condition of statistical treatment core; According to type and the described loading condition of described thread request, thread is dispensed to corresponding types and the lightest processing core execution of load.
Wherein, the type of the thread request among the step 303-A comprises professional thread request and voice thread request, professional thread request is corresponding with the business processing core, the voice thread request is corresponding with the speech processes core, for example: in multiple core processing system shown in Figure 1, can specify CPU1 is the business processing core, be used for carrying out the threads such as heartbeat detection that enter, withdraw from, detect the client presence of chatroom, because the priority of this part thread is higher, quality influence to chatting service is larger, needs independent processing core to process.Specifying CPU2, CPU3 and CPU4 is the speech processes core, and the voice conversation that is used for chat user is processed.Among the step 303-A, carry out by the processing core that dissimilar professional threads is assigned to corresponding types, can effectively promote the percent of call completed of chatroom, promote the user and experience.
Among the step 303-B, loading condition can comprise the resource utilization of processing core and/or carry out queue length that wherein, resource utilization is for processing its main operational time divided by processing its main operational time and processing core free time sum.
Step 303-C then is the optimum way that combines step 303-A and step 303-B, both can effectively promote the percent of call completed of chatroom, promotes the user and experiences, and can realize again processing the load balancing between the core.
By another kind of thread scheduling method is provided in the embodiment of the invention two, create a thread pool by processing core for each, the receiving thread request, according to default allocation strategy, the processing core that thread is dispensed to appointment is carried out, the parameter value of thread affinity function is set, the processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.Reduce the expense of bringing of thread creation and destruction, avoided the internuclear switching of multithreading, reduced the thread handover overhead, shortened thread switching time, promoted the execution efficient of multithreading.
Embodiment three
The thread scheduling device is provided in the embodiment of the invention three, and as shown in Figure 4, this device comprises:
Receiver module 410 is used for the receiving thread request;
Thread distribution module 420 is used for according to default allocation strategy, and the processing core that thread is dispensed to appointment is carried out;
Thread binding module 430 is used for the processing core of thread and 420 appointments of thread distribution module is bound, and can only carry out in the processing core of described appointment to limit described thread.
Wherein, thread distribution module 420 comprises:
Judging unit 421 is for the type of judging thread request;
Statistic unit 422 is for the loading condition of statistical treatment core;
Allocation units 423, the described loading condition for type and the described statistic unit 422 of the described thread request of judging according to judging unit 421 are added up is dispensed to corresponding types and the lightest processing core execution of load with thread.
The thread scheduling device can also comprise: thread pool creation module 440 is used to each to process core and creates thread pool.
Embodiment four
Multi-core processor system in one is provided in the embodiment of the invention four, and as shown in Figure 5, this multi-core processor system comprises:
Multinuclear is processed core 510 and thread scheduling device 520, wherein,
Multinuclear is processed core 510 and is comprised that at least two are processed core, processes core and is used for the multithreading execution;
Wherein, thread scheduling device 520 specifically can be used for the receiving thread request; Judge the type of described thread request; According to the type of thread request, the arbitrary processing core that thread is dispensed to corresponding types is carried out; The processing core of thread and appointment is bound, can only carry out in the processing core of distributing to limit thread.
Can also be used for the receiving thread request; The loading condition of statistical treatment core; According to described loading condition, described thread is assigned to the lightest processing core of load carries out; The processing core of thread and appointment is bound, can only carry out in the processing core of distributing to limit thread.
Can also be used for the receiving thread request; Judge the type of described thread request, and the loading condition of statistical treatment core; According to type and the described loading condition of described thread request, thread is dispensed to corresponding types and the lightest processing core execution of load; The processing core of thread and appointment is bound, can only carry out in the processing core of distributing to limit thread.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement by hardware, but the former is better embodiment in a lot of situation.Based on such understanding, technical scheme of the present invention is to can embodying with the form of software product in whole or in part that background technology contributes, this computer software product can be stored in the storage medium, such as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
More than the present invention is described in detail, used specific case herein principle of the present invention and embodiment set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a thread scheduling method is characterized in that, is applicable to multiple core processing system, and described method comprises:
The receiving thread request;
According to default allocation strategy, the processing core that thread is dispensed to appointment is carried out;
The processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.
2. method according to claim 1 is characterized in that, the allocation strategy that described basis is default, and the processing core that thread is dispensed to appointment is carried out, and comprising:
Judge the type of described thread request; According to the type of thread request, the arbitrary processing core that thread is dispensed to corresponding types is carried out;
Perhaps,
The loading condition of statistical treatment core; According to described loading condition, described thread is assigned to the lightest processing core of load carries out;
Perhaps,
Judge the type of described thread request, and the loading condition of statistical treatment core; According to type and the described loading condition of described thread request, thread is dispensed to corresponding types and the lightest processing core execution of load.
3. method according to claim 2 is characterized in that, the type of described thread request comprises professional thread request and voice thread request, and described professional thread request is corresponding with the business processing core, and described voice thread request is corresponding with the speech processes core.
4. method according to claim 1 is characterized in that, before the described method, also comprises: process core for each and create a thread pool.
5. a thread scheduling device is characterized in that, described thread scheduling device comprises:
Receiver module is used for the receiving thread request;
The thread distribution module is used for according to default allocation strategy, and the processing core that thread is dispensed to appointment is carried out;
The thread binding module is used for the processing core of described thread and the appointment of described thread distribution module is bound, and can only carry out in the processing core of described appointment to limit described thread.
6. thread scheduling device according to claim 5 is characterized in that, described thread distribution module comprises:
Judging unit is for the type of judging described thread request;
Statistic unit is for the loading condition of statistical treatment core;
Allocation units, the described loading condition for type and the described statistic unit of the described thread request that goes out according to described judgment unit judges are added up is dispensed to corresponding types and the lightest processing core execution of load with thread.
7. according to claim 5 or 6 described thread scheduling devices, it is characterized in that described thread scheduling device also comprises: the thread pool creation module is used to each to process core and creates thread pool.
8. a multiple core processing system is characterized in that, described system comprises: multinuclear is processed the kernel thread dispatching device, wherein,
Described multinuclear is processed core and is comprised that at least two are processed core, and this is processed core and is used for the multithreading execution;
Described thread scheduling device is used for the receiving thread request; According to default allocation strategy, the processing core that thread is dispensed to appointment is carried out; The processing core of described thread and described appointment is bound, can only carry out in the processing core of described appointment to limit described thread.
9. multiple core processing system according to claim 8 is characterized in that, described thread scheduling device is according to default allocation strategy, and the processing core that thread is dispensed to appointment is carried out, and comprising:
Judge the type of described thread request; According to the type of thread request, the arbitrary processing core that thread is dispensed to corresponding types is carried out;
Perhaps,
The loading condition of statistical treatment core; According to described loading condition, described thread is assigned to the lightest processing core of load carries out;
Perhaps,
Judge the type of described thread request, and the loading condition of statistical treatment core; According to type and the described loading condition of described thread request, thread is dispensed to corresponding types and the lightest processing core execution of load.
10. multiple core processing system according to claim 9, it is characterized in that, described multinuclear is processed core and is comprised business processing core and speech processes core, and described business processing core is used for carrying out professional thread, and described speech processes core is used for carrying out the voice thread.
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| CN109586989A (en) * | 2017-09-28 | 2019-04-05 | 阿里巴巴集团控股有限公司 | A kind of state detection method, device and group system |
| US11782756B2 (en) | 2018-04-20 | 2023-10-10 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and apparatus for scheduling processor core, and storage medium |
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| CN112654939B (en) * | 2018-11-15 | 2023-11-21 | 欧姆龙株式会社 | Control system and control device |
| CN109920417B (en) * | 2019-02-18 | 2021-05-18 | 广州视源电子科技股份有限公司 | Voice processing method, device, equipment and storage medium |
| CN109920417A (en) * | 2019-02-18 | 2019-06-21 | 广州视源电子科技股份有限公司 | A kind of method of speech processing, device, equipment and storage medium |
| CN111585999A (en) * | 2020-04-28 | 2020-08-25 | 深圳震有科技股份有限公司 | Data conversion method, system and storage medium |
| CN112346819A (en) * | 2020-11-06 | 2021-02-09 | 无锡江南计算技术研究所 | Container application-oriented network service isolation method |
| CN114090997A (en) * | 2021-11-24 | 2022-02-25 | 北京邮电大学 | Voice instruction process scheduling method and device |
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Application publication date: 20131023 |