30results about How to "Reduce the number of syncs" patented technology

The invention relates to a low-energy consumption sleeping monitoring method synchronous relative to time of a wireless sensor network. The traditional method is high in energy consumption. The method in the invention comprises the following steps: in the stage of creating a relative synchronization table at a new node, broadcasting addition request network packets by the new node firstly to obtain synchronizing information of a neighbourhood node; then estimating clock skew, and linearly fitting multigroup of synchronization information of the neighbourhood node to estimate clock drift; and finally saving the sleeping period of the neighbourhood node, the estimated clock skew and the clock drift into the relative synchronization table; and in the stage of prediction and transmission of data packets of the node, realizing relative synchronization with a target node by the node according to the created relative synchronization table, then predicting the waking time at the next time according to the sleeping period of the node, setting a transmission timer, and finally transmitting data packets by a short permeable when the transmission timer is triggered. According to the invention, the energy overhead for sending the data packets by the node can be saved, and the idle time of a transmitting node is reduced, and the sleeping time of the transmitting node is increased.

The invention relates to a hierarchical wireless sensor network time synchronization method and belongs to a wireless sensor network time synchronization method. The method respectively adopts different synchronization mechanisms aiming at response nodes and ordinary non-response sub nodes and adopts different estimation methods to calculate the clock offset and the clock frequency offset relative to reference nodes; the hierarchical time synchronization method is divided into two stages, namely a hierarchical discovery and sub node collection stage and a time synchronization stage, wherein during the hierarchical discovery and sub node collection stage, a hierarchical structure of a wireless sensor network is established, and the response nodes on each layer are determined through collecting sub node information; during the time synchronization stage, a maximum likelihood estimation method and a least square method are utilized for calculating the clock offset and the frequency offset between the sub nodes and the reference nodes, a clock is further compensated, and by parity of reasoning, the synchronization within a whole network range is finally achieved. The hierarchical wireless sensor network time synchronization method has the advantages that the synchronous message overhead is reduced, and the energy consumption is reduced; the time synchronization accuracy is improved; the expandability is enlarged on aspect of new node addition.

The embodiment of the invention discloses a data synchronous method, a node and a storage service cluster. The method comprises the steps that the node receives a request sent by a client side for obtaining a first object, when the first object and a version number of the first object are stored in the node, the version number of the first object stored in a main node is inquired according to an identifier of the first object of the node, whether the version number of the first object stored in the node is identical with the first version number, inquired from the main node, of the first object is judged from the node, and if not, the first object and the version number of the first object stored in the node are synchronously updated into the first object and the first version number in the main node. Accordingly, when the client terminal needs to read the object, the node determines update of the object by comparing the version number of the object stored in the node with the version number of the object stored in the main node, and synchronously updates the updated object, and therefore times of synchronization of the object can be reduced, and computing resources are saved.

An embodiment of the invention provides a method and equipment for acquiring minimum cut of directed graphs. The method includes respectively partitioning each directed graph into at least two meeting point sub-graphs and at least two source point sub-graphs according to preset strategies; acquiring minimum cut sets of all the meeting point sub-graphs by means of parallel computation, acquiring equivalent meeting points of the directed graphs by the aid of communication between the meeting point sub-graphs, acquiring minimum cut sets of all the source point sub-graphs by means of parallel computation and acquiring equivalent source points of the directed graphs by the aid of communication between the source point sub-graphs; acquiring the minimum cut of the directed graphs according to all connected edges of the equivalent meeting points of the directed graphs and the equivalent source points of the directed graphs. The method and the equipment for acquiring the minimum cut of the directed graphs have the advantages that the minimum cut of the directed graphs are acquired from node sets in forms of the sub-graphs in relations with one another sequentially, accordingly, communication frequencies and synchronization frequencies among active nodes during parallel computation can be reduced, and the performance can be improved.

The invention belongs to the field of software design and relates to a GPU-oriented virtual IO ringbuffer realization method. The method comprises the steps of writing to-be-stored data in a continuous space starting from a head address of a free space of a ringbuffer if the free space of the ringbuffer can store current data when the data needs to be stored in the ringbuffer, and updating write pointer information; if the free space of the ringbuffer cannot store the current data, initiating synchronization operation to ringbuffer IO control (3) by ringbuffer virtual IO control (2), and re-performing data storage operation; when a data transmission startup instruction is received, sending data information stored in the ringbuffer, and after the sending is finished, updating read pointer information in the ringbuffer IO control (3); and when the space is full of the data in the ringbuffer, actively initiating data transmission operation, and after the sending is finished, updating the read pointer information in the ringbuffer IO control (3). According to the method, ringbuffer management of virtual IO is constructed, so that the costs of the ringbuffer in data transmission and space management are reduced, the communication arbitration cost of a host interface of a GPU is reduced, and the utilization efficiency of the host interface of the GPU is improved.

The invention provides a method for synchronously optimizing a network tariff index of an access authentication page. The method comprises the following steps: when a user terminal is successful in access authentication, starting to measure a first network tariff index by an access server, wherein the first network tariff index is the time of online or the Internet traffic; and issuing the first network tariff index to the user terminal at the preset synchronization time, so as to facilitate the user terminal to start to measure according to the first network tariff index. Therefore, according to the technical scheme of the invention, a local measuring instrument is implanted at an access authentication successful page of the user terminal, when the user terminal is successful in access authentication, the access server and the user terminal time synchronously, and necessary data synchronization is only performed when the user terminal authenticates again, is on-line or within a set synchronization cycle, so that the synchronization times of the user terminal and the access server can be greatly reduced, the synchronization pressure of the access server can be alleviated and the user experience can be improved.

The invention relates to a heterogeneous many-core-based LBM parallel optimization method. According to the inventive concept, the invention provides the LBM parallel optimization method for multi-layer grids, which comprises the following steps of: 1, changing a calculation process under the multi-layer grids according to LBM parallel operation characteristics; 2, adopting a two-dimensional division strategy for process task division, and meanwhile designing a corresponding communication strategy according to the division condition; and 3, designing the size of a communication buffer area according to LBM parallel operation characteristics and arranging required data for communication. The method has the specific advantages that the number of times of communication synchronization is reduced according to the characteristics of LBM parallel operation, so that the proportion of CPU vacancy is reduced; the two-dimensional division strategy is adopted in task process division, so that the computational domain boundary can be flexibly adjusted according to the calculated amount on the basis of ensuring correctness, and neat correspondence is not needed; correct calculation can be ensured only through partial data communication, and the communication data volume is reduced. The final effect is the improvement of the speed-up ratio and the speed-up efficiency.

The invention discloses a data synchronization method and device, a storage medium and an electronic device. The method comprises the steps that in the process of running a game task on a game application client side, acquiring a data synchronization request triggered by a key event in the game task, wherein the key event is used for indicating that attribute data of props held by a virtual character controlled by the game application client side changes, and the change amplitude is larger than a target threshold value; and in response to the data synchronization request, performing data synchronization between the game application client and the game application server, so that the attribute data of the props stored in the game application client is consistent with the attribute data of the props stored in the game application server. According to the invention, the technical problem of performance consumption increase caused by frequent data synchronization is solved.

The invention discloses a synchronization method of a multi-DSP (Digital Signal Processor) embedded computer system. According to the invention, role positioning for each DSP of the multi-DSP embeddedcomputer system is completed through dividing a master-slave logic relation for the multi-DSP embedded computer system, the reasonable framework and reasonable workflow design of the system are ensured, the coordination of a control function and an operation function in a system algorithm flow can be realized in an optimal manner, and the operation efficiency of the system is improved. With the support of the logic framework and hardware design, a specific method supporting software synchronization of the multi-DSP embedded computer system is realized. All slave DSPs sends a handshake signalto the master DSP through a Flag I/O after completing the preposition work, the master DSP receives the handshake signals of all slave DSPs and then sends a unified execution command to all slave DSPs, thereby realizing synchronization and simultaneous operation of the multiple DSPs.

The invention discloses an optimization method of parallel communication of SOR, and provides a multiplayer symmetrical SOR iterative method for the problems of communication and synchronization overhead in parallelization of the traditional SOR iterative method, and realizes the parallelization of serial implementation in a high-performance network computing environment by an alternate tiling method. The alternate tiling method comprises the following steps: introducing a time delay technology to improve a region splitting method, realizing the partitioning of a spatial mesh; reordering by mesh tiles, changing the data dependence relation among the mesh tiles, improving the parallelism degree of the execution of the tiles, and greatly reducing the frequency of communication start and synchronization. Therefore, the optimization method has higher parallelization efficiency and better extensibility than the traditional region splitting method and the red-black ordering method.

The invention provides a method and device for realizing a non-branching seamless game world, and the method comprises the steps: calculation logic needing to be executed by each frame in a server ofa multi-player online game is summarized into a plurality of logic types, and a plurality of stages corresponding to a thread pool is determined according to the plurality of logic types, the threadpool in stages is executed according to the plurality of stages in each frame, when one stage starts, the thread pool activates all threads, each thread executes the calculation logic in the logic category corresponding to the current stage, after the calculation logic corresponding to the current stage is executed, whether asynchronous logic data waiting for asynchronous execution exists in a lockless queue of the thread or not is detected; and if yes, the asynchronous logic data is executed to perform data synchronization, and when each thread executes the calculation logic corresponding tothe current stage and each thread does not have the asynchronous logic waiting for asynchronous execution, the next stage is started until the execution of the multiple stages is completed.

The embodiment of the invention discloses an information synchronization method and device, electronic equipment and a computer readable medium. According to one specific embodiment, the method comprises: obtaining a source end database, wherein to-be-synchronized data of the source end database is obtained based on a site, the source end database comprises at least one transaction, and the site is used for identifying the position of the to-be-synchronized data of the transaction; analyzing the to-be-synchronized data into at least one to-be-processed transaction, and determining quantity information of the at least one to-be-processed transaction; and sending the at least one to-be-processed transaction to a to-be-synchronized database in a parallel sending mode based on the quantity information. According to the embodiment, the information synchronization efficiency is improved.