103results about How to "Reduce CPU load" patented technology

A system for optimizing data access is provided. The system includes a cluster file system server, a number of cluster file system clients, and a storage system. The storage system includes disk drives organized as paired master disk drive and one or more mirrored disk drives having copies of the data stored on the master disk drive. When a file is needed, the server determines which pair has the needed file, and then determines which disk drive within the pair should be accessed. The determination is made to balance the access load within the pair, and can select to retrieve the file from the drive which is least frequently accessed. The identification of the disk drive to be accessed is then forwarded to the client thereby allowing the client to access the appropriate disk drive to retrieve the file.

Disclosed is a digital video coding system and more particularly technology capable of reducing the load of a CPU (Central Processing Unit) that controls a video coding system for implementing a digital video data compression/decompression standard such as MPEG-1, 2, 4, H.261 or H.263. In a conventional video coding system, the circuit configuration and control method of a variable-length encoder are becoming increasingly complex with the development of a video compression/decompression standard. In a conventional system structure, a complex control operation must be carried out, such that there is a problem in that the load of the CPU controlling the video coding system increases. Thus, the video coding technology is provided to reduce the load of the CPU necessary for controlling a VLC (Variable Length Coding) unit.

This invention discloses a cluster management method for network equipments including the manage orders line users to assign a device as the manage equiopment from the network equipments collecting topology information within the specified hop numbers, the manage orders the line user to decide if it sets up an equipment manage cluster or equipments in the cluster and allocate every member equipment including distributing private IP address and its number, then the equipment will carry out the cluster management.

The invention relates to a distributing type sound-mixing system used in multimedia conferences. The sound-mixing system comprises a voice main server, a voice sub-server and a client end, wherein, the client end is connected with the voice sub-server, the voice sub-server is connected with the voice main server, and the client end comprises a voice collecting module used for transmitting the audio data stream formed during the conversation when talking with conference attendants; a voice sending module used for sending the collected audio data stream to the voice sub-server through real-time transmission protocol in the way of packaging the voice frame; a signal energy calculating module used for calculate the signal energy E after collecting the audio data stream; the voice main server and the voice sub-server used for networks presenting an arborescence shape; the voice main server realizes the final selecting algorithm, and the sub-voice server adopts the initial selecting algorithm. The invention provides a distributing type sound-mixing system which is used in multimedia conference and can reduce the CPU load of the server end and enhance the sound-mixing efficiency.

This invention relates to broadband access field, specially relates to a method by which can make certification to network users and carry out operational management, first build up the network analysis situs of access equipment on the access server, and register the capacity of access equipment; the access equipment sends the basic information of users to the access sever, the access server sends the certification information of users to AAA server, the AAA server confirms this certification of users has passed, sends the passing information and authorization message to the access equipment, after the access equipment receives the authorization message, completes stated action, implements the certification and operational management to users. This method can complete the control for multicast, broadband operation on the bottom layer access equipment.

This invention discloses a method for data transfer between a host memory and a flash memory module through direct memory access (DMA), and a related data-transfer subsystem. In one embodiment, the subsystem comprises a DMA controller, a flash-memory controller, a data buffer for buffering data transferred between the DMA controller and the flash-memory controller, and a status-register group for storing a current status of the data buffer. The DMA controller and the flash-memory controller are configured such that both of them are allowed to update the current status and to detect a change of the current status during the data transfer, so that a substantial part of the data transfer's process is executed through direct interaction between the DMA controller and the flash-memory controller without involving a central processing unit. The subsystem may further comprise a command storing unit for storing command packages for execution by the flash-memory controller.

In the storage-based snapshot creation, a block-selection specifying unit provided on a NAS processing unit specifies a block, which becomes necessary for the generation of snapshot data, to a specified-block analyzing unit within a disk apparatus. Moreover, a disk controller generates the snapshot data on the block specified as the snapshot target, while making an inquiry to the specified-block analyzing unit. This makes it possible to create the snapshot in a storage-capacity reduced manner, and to specify the snapshot creation in a partition, file, or directory unit.

A microcomputer which obtains a rotor position signal from a biphase signal delivered by a resolver mounted on an electric motor according to a rotation phase of a rotor relative to a stator, thereby controlling the motor based on the rotor position signal. The microcomputer includes a digital signal converter which is configured by hardware and converts the biphase signal delivered from the resolver into a digital data position signal, the digital signal converter being mounted on a single chip.

In a memory, a file is stored at discontinuous page addresses. The information thereon is recorded in FAT of the memory. When an application program in a host system performs a read operation for the file, a FAT system refers to the FAT to read out page indexes of the file. Then, the page indexes are stored in a page index buffer included in a memory controller. When a DMAC outputs a read command, a page index transfer sequencer replaces an address part of this read command with the page indexes and outputs page-replaced read commands to the memory.

A method for capturing an image using an image capturing module with multiple pixels configured in a 2-dimensional matrix and a focal plane electronic shutter function which sequentially slides the exposure timing by constant interval by pixel group which is a unit of predetermined number of the pixels while scanning; the method includes an image data input process for detecting shutter operation, obtaining a reference image while skipping one or more of the pixel groups by sequentially sliding the exposure timing by the constant interval, and obtaining a target image while not skipping pixel groups to be captured, a motion data detection process for calculating the motion data of the target image based on the reference image, and a distortion compensation process for compensating for distortion in the target image according to the motion data.

A CPU calculates, based on a frequency command value for driving a motor and on a state quantity of the motor, an output-voltage command value in which only the phase advances while amplitude is constant in each calculation period, without reducing the calculation period. An ASIC reflects the output-voltage command value in a triangular wave signal in a time-series order to compare with each other, and outputs a PWM signal to a switching circuit. Thus, a waveform of an output voltage is made close to a sine wave irrespective of an output frequency being high or low, and a processing load of the CPU is reduced.

When an interval is designated by pushing a specific button at the time of displaying video desiring to be deleted and again pushing the specific button at the time of completing the video desiring to be deleted while reproduced video displayed on a television monitor is viewed, video in the interval from a point in the time when the button is pushed at the first time to a point in time when it is pushed at the second time is deleted. At the time of the next production, only necessary video can be reproduced.

In a client server network, the invention provides improved message routing, useful in sending a plurality of subscriber messages from a single Server published message. The invention provides all the benefits of TCP delivery with most of the efficiency of IP multicast delivery. The invention provides for a Controller associated in the Client Server communication, where the Controller effectively routes the Server message to subscribed Clients. The invention provides efficient distribution of streaming data to one or more consumers in a way that enables easy integration in consuming applications. The invention provides means to implement a Java Message Service (JMS) distribution adapter in hardware. The invention further provides for hardware implementation of various wire protocol transforms.

The invention discloses a data storage method. The method comprises the steps that when a write data request is received, to-be-stored data corresponding to the write data request is subjected to sampling and processing to obtain sample data, information entropy of the sample data is calculated, and whether the to-be-stored data can be compressed or not can be judged according to the information entropy obtained through calculation; if it is judged that the to-be-stored data can be compressed according to the information entropy, the to-be-stored data is compressed and then written into a storage system; if it is judged that the to-be-stored data can not be compressed according to the information entropy, the to-be-stored data is written into the storage system. The invention further provides a data storage device. Accordingly, the problem that when the data is compressed and stored, due to the fact that the data compression efficiency is low and the CPU burden of the system is large,I/O delay is caused is solved.

The invention belongs to the field of radio and satellite navigation simulator and relates to a method of realizing sampling data stream low-delay transmission based on a 10 gigabit Intel network card. The method comprises the steps of (S1) loading a drive program and initializing the 10 gigabit Intel network card; (S2) mapping each caching node in a data caching block queue into memory space of an application program; (S3) sending time mark messages to the 10 gigabit Intel network card every 1 ms at a digital-analogue conversion device end; (S4) after reception of the time mark messages whichare sent every 1 ms is interrupted, parsing timestamp information in the time mark messages by the drive program; (S5) starting to generate sampling data at the 1 ms by the application program when the drive program sets a 1 ms time d arrival mark; (S6) obtaining caching node data based on the timestamp information; (S7) composing an Ethernet transmitting frame based on the caching node data; (S8) assigning a packet head and a packet body to two different DMA transmission descriptors, separately, configuring the DMA transmission descriptors to DMA engine register space of the 10 gigabit Intelnetwork card and starting up data transmission.

The invention provides a dual-stack BFD detection method and a dual-stack BFD detection system. The system comprises a first device and a second device, and a plurality of IPV4 BFD sessions and a plurality of IPV6 BFD sessions are operated between the first device and the second device. The method comprises the steps of detecting whether one IPV4 BFD session and one IPV6 BFD session share the sameport of the first device and the same port of the second device or not, and if yes, associating the IPV4 BFD session with the IPV6 BFD session; if the two BFD sessions associated with each other areboth in the UP state, combining the messages corresponding to the two sessions, that is, sending the BFD messages packaged twice through the IPV4 protocol and the IPV6 protocol to the second device; and using the second device to decapsulate the encapsulated BFD message twice to obtain a BFD message, and then performing IPV4 BFD session processing and IPV6 BFD session processing respectively. Dueto the combining processing of the session messages, the number of the messages can be reduced to 1/2 of the number of the messages in the original technical scheme, so that the network congestion ona communication link can be reduced.

The invention discloses a Linux network card driving controller of a dual-network redundant Ethernet controller. The Linux network card driving controller comprises a system bus protocol control module, a control status register module, a receiving transmission control module, a receiving data buffer zone, a redundant channel switching control module, and a MAC protocol control module. The systembus protocol control module is configured to receive a system bus and is connected with the control status register module and the MAC protocol control module; the control status register module connected with the receiving data buffer zone and the redundant channel switching control module by the receiving transmission control module is used for receiving and sending a GMII interface signal; andthe MAC protocol control module connected with the control status register module and the receiving transmission control module is used for receiving and sending an MII interface signal through a first PHY management module to realize MAC layer protocol control during data communication. According to the invention, the Linux network card driving controller has the high reliability; and accurate and efficient allocation, utilization and recycling of the memory resource buffer zones and descriptors are realized.

The invention relates to a file uploading processing method, a device and a server. If a plurality of message digests are the same message digest, the file status of the file to be uploaded on the server is queried according to the received message digest, wherein, the message digest received for the first time is sent by the first client; according to the file state, if it is judged that the fileto be uploaded needs to be uploaded, only the upload request of the first client is processed, the file to be uploaded is uploaded through the first client, and the file state of the file to be uploaded is displayed on the other clients among the multiple clients. According to the upload request of the file upload, the server processes the input operation of only one file for the same file, and sends only the current upload state of the file to be uploaded to other clients, thereby reducing the burden of the server, saving the system storage resources, reducing the use of the bandwidth, and improving the transmission efficiency.

The application discloses data transmitting and receiving methods and devices. One specific embodiment of the data transmitting method comprises the following steps: transmitting data to be transmitted; randomly generating an encryption length; encrypting the data from a predetermined position till an encryption length reaches the abovementioned encryption length in order to generated encrypted data; generating message header information including the encryption length; and constructing the message header information and the encrypted data into a complete message for transmission. Through the embodiment, the problem of high CPU (Central Processing Unit) occupation rate of a data transmission end is solved. One embodiment of the data receiving method comprises the following steps: acquiring received data; reading the message header information in the data, and extracting a decryption length; and decrypting the data from a predetermined position till a decryption length reaches the abovementioned decryption length in order to generate decrypted data. Through the embodiment, the problem of high CPU occupation rate of a data receiving end is solved.

The invention discloses a 3D printer temperature control system. The 3D printer temperature control system comprises a bus interface module, a register file, a PID operation module and a temperature acquisition module which are sequentially connected, wherein the PID operation module is also connected with a heating module; the temperature acquisition module judges acquired temperature; if the acquired temperature is not out of range, temperature data is sent to the PID operation module; after calculation of the PID operation module is completed, an effective signal and PID control quantity are output to the heating module; the heating module adopts a PWM mode for heating; heating time is controlled by virtue of a PWM method according to the PID control quantity; the PID operation module is divided into four parts, namely scale operation, integration operation, differential operation and PID result operation; PID operation result is completed after six cycles. The 3D printer temperature control system disclosed by the invention has the advantages that PID operation result can be output once every six cycles by virtue of the PID operation module, and the heating module adopts a novel PWM hardware structure, so that real-time property, accuracy and stability of temperature control are effectively improved, CPU load is reduced, and function extension of the 3D printer can be facilitated.

The invention discloses a multimedia resource obtaining method which comprises the steps: a multimedia resource saved in the form of vector points after hash process is stored by a first server uniformly; the first server determines a query point specified by a user and an identifier of a hashing bucket that the query point belongs to according to the request message transmitted by a client, and transmits a notification message carrying the identifier to a second server; and when determining the local existence of the hash bucket saved corresponding to the identifier according to the identifier carried in the notification message, the second server obtains at least one vector point nearest to the query point in the hash bucket and sends the at least one vector points to the client. In this way, operational pressure on the first server is released to a degree, thereby quickening the responding speed of a whole system in providing multimedia resource query service, and further improving user experience. The invention also discloses a communication device and a communication system simultaneously.