190results about How to "Improve memory utilization" patented technology

The invention discloses a distributed file system metadata management method facing to high-performance calculation. The method comprises the following steps of: 1) establishing a catalogue metadata server cluster, a file metadata server cluster and an object storage server cluster; 2) establishing a global counting-based bloom filter in the catalogue metadata server cluster; 3) when the operation request of a client side arrives, skipping to execute step 4) or 5); 4) enabling the catalogue metadata server cluster to respond to the catalogue operation request of the client side to manage the catalogue metadata; and 5) enabling the file metadata server cluster to respond to the file operation request of the client side to manage the file metadata data. According to the distributed file system metadata management method disclosed by the invention, the metadata transferring problem brought by catalogue renaming can be effectively solved, and the distributed file system metadata management method has the advantages of high storage performance, small maintenance expenditure, high load, no bottleneck, good expansibility and balanced load.

A method and apparatus are disclosed that store sequential data units of a data packet received at an input port in contiguous banks of a buffer in a shared memory. Buffer memory utilization can be improved by storing multiple packets in a single buffer. For each buffer, a buffer usage count is stored that indicates the sum (over all packets represented in the buffer) of the number of output ports toward which each of the packets is destined. The buffer usage count provides a mechanism for determining when a buffer is free. The buffer usage count can also indicate a number of destination ports for a packet to perform a multicasting operation. Buffers can comprise one or more groups and each of the groups can comprise a plurality of banks.

The invention discloses a dynamic management method of a DSP data area, comprising the following steps: according the type of object data on a DSP node and the storage requirement of each object data, partitioning the address space of the DSP data area, wherein each partitioned zone corresponds to one memory resource object; building an object data pool in each memory resource object, wherein the size of the data block in the same object data pool is same, and the size of each data block corresponds to the storage requirement of the object data stored in the object data pool; building the relevance of the partitioned zone and the object data pool, and initializing the control information of the object data pool; and performing the distribution and the release of the data block in the object data pool. The method can dynamically manage the memory data area of the DSP according to practical application, is efficient and does not have memory fragments.

The invention discloses a multi-core DSP starting method. The method comprises the steps of S1, arranging an ROM region in a multi-core DSP chip, loading a pre-established start loading program in theROM region, and configuring a peripheral needed to be adopted during chip starting and a starting mode needed to be adopted by the peripheral through a starting mode register, wherein the start loading program comprises multiple starting modes, used for starting the multi-core DSP chip, of multiple peripherals; and S2, after the chip is reset, executing the start loading program by a main core, reading the starting mode register, obtaining the target peripheral needed to be adopted currently and the target starting mode needed to be adopted, loading a user program, and after loading of the user program is finished, enabling other cores to jump to a specified address for starting executing respective user programs in an interrupt mode. The multi-peripheral and multi-mode multi-core DSP starting can be realized; the memory utilization rate and efficiency are high; the application range is wide; and the flexibility is good.

The invention discloses a memory management method and device for a multiprocess system. The memory management method and device for the multiprocess system are used for optimizing a memory management mode of the system and improving the memory utilization rate and the success rate of memory distribution. The memory management method for the multiprocess system comprises the steps that integrated planning of memory blocks is carried out by the memory management device by means of a shared memory pool, application and release of the memory blocks in the memory pool by multiple processes are distinguished according to identification information and mutually exclusive semaphore of the processes, the multiple processes can have access to memory blocks with the same specification without mutual interference, therefore, optimized memory management can be achieved, resource consumption caused by repeated application to an operation system due to the fact that the memory is not sufficient is avoided, a large amount of memory fragmentation is prevented from being generated in the operation system, and the memory utilization rate and the success rate of memory distribution of the system are effectively improved.

The invention relates to a rapid rendering method for a complex indoor scene based on view frustum culling. The method comprises the following steps: firstly, dividing the whole scene into n areas, connecting the adjacent areas by portals, and then determining the position of a view point, performing intersection detection on all geometric modules in an area module and a viewing pyramid, completing the view frustum culling work, and finally computing number of the Portals within a viewable scope, computing a new viewing pyramid, performing the new view frustum culling, and recursing the steps to obtain a node that needs rendering. Experimental results prove that the rendering efficiency can be greatly improved by the indoor scene management method provided by the invention when the indoor shielding rate is high.

The embodiment of the invention discloses an embedded system log recording method and device. According to the method, a total number of files and an upper limit of a file size set by a user are received; generated log information is stored into a target file, and if the target file does not exist, the target file is established first; and when the memory size of the target file exceeds the upper limit, the target file is renamed, and a target file with the original file name is reestablished and used for recording newly generated log information. When the number of all established log files exceeds the total number, one log file not conforming to a preset condition is deleted, all the remaining log files and the target file are renamed according to preset naming rules, and a target file is created again. Logs are recorded in a rolling mode, that is, when the log recording size reaches the upper limit, newly recorded logs will cover oldest logs, and therefore the purposes of increasing the memory utilization rate and prolonging log recording time are achieved.

A data management method and apparatus of a portable terminal improves memory utilization efficiency using a data move/copy function which allows moving or copying the user data preserved in the non-volatile memory region of the memory of a portable terminal. A data management method for a portable terminal includes selecting at least one user data item in response to a selection request. An extended region for backup of the user data item is checked in response to a backup request. Transfer data corresponding to the user data item is created. The transfer data is stored in the extended region as a backup of the user data item.

The invention provides a cluster fine-grained memory management method. The cluster fine-grained memory management method includes: step 1, dividing internal storage into two broad category regions, wherein the first category is a global shared region and responsible for allocating and recovering large objects larger than or equal to a threshold value in size, the second category comprises independent thread local caches for every thread and is used for allocating small objects smaller than the threshold value in size, the thread local cache is composed of multiple block groups, each block group is a free chain table of an internal storage object, blocks in one block group are identical in size, the blocks in different groups are in equal difference in size, and the global shared region comprises a small object distribution region and a global page cache; step 2, performing memory allocation for memory applied by an application program, and starting corresponding allocation modes after the large objects and the small objects are distinguished; step 3, releasing the memory. The cluster fine-grained memory management method is capable of allocating and releasing the large objects and the small objects, particularly suitable for multi-thread applications and high in memory utilization rate.

A computer implemented method for protecting data stored in at least one file from being overwritten by malicious code, comprises: monitoring at least one file stored in a storage device location to detect a request to perform an overwrite operation at least a portion of data of the at least one file; redirecting the overwrite operation to a memory location designated as safe for being overwritten; analyzing the overwrite operation at the memory location to identify an association with malicious code; and outputting an indication of an attempt to overwrite the at least one file by malicious code.

The invention discloses a cache control method in an M2M system. The method comprises the following steps: the system creates an M2M (machine to machine) terminal message cache queue, and adds the generated M2M terminal message cache queue information into cache queue management information; according to the cache queue management information, the system stores a message reported by the M2M terminal into a corresponding M2M terminal message cache queue in a memory cache way and a file cache way, or extracts an M2M terminal message from a corresponding M2M terminal message cache queue. By applying the invention, when providing high efficient and unlimited cache space, a utilization rate of memory also can be raised simultaneously.

The invention relates to a PTN equipment single-disk configuration system and a method based on a common business model, and relates to the field of communication equipment, and the method comprises the steps: a common business model, a matching rule base and a configuration database are initialized; a single disk receives configuration information and splits the configuration information into a plurality of configuration entries, each configuration entry is made to map a plurality of configuration objects; the configuration information of the configuration objects is divided into configuration data and configuration commands, the configuration data is saved in the configuration database, the configuration commands are sent to adjacent lower layer function modules, each layer function module performs adaptation processing on configuration objects and finishes the configuration processing of corresponding configuration commands till the bottom layer, the configuration information is adapted to bit-level data which can be directly written in a chip internal memory or an internal hard table, and the information configured to a single-disk hardware is finished. According to the invention, the redundant backup of the configuration data can be reduced, the CPU memory is saved, and the expansion need of the PTN equipment is met.

The embodiment of the invention discloses a memory management method and device. The method comprises the following steps: when receiving a memory application request of any node program, distributing a memory block to any node program, and marking the memory block into an occupancy state in a memory pool linked list; when receiving a memory release request of any node program, releasing a memory release block according to the memory release request, and marking the memory release block in the memory pool linked list into an idle state; and when the memory release block is a first split block and a second split block corresponding to the first split block is in the idle state, combining the first split block and the second split block into a combined memory block. By releasing the memory block corresponding to the memory release request of any node program, memory fragments generated by an uncertain memory application size are reduced, so that waste of resources is avoided. The node memory can be reasonably utilized by splitting and combining the memory block, so that the memory utilization rate is improved.

The invention discloses a memory allocation management method and a memory allocation management system. The method comprises the following steps: receiving the memory allocation request carried with memory size from an application program; seeking a memory block chain table with node memory size adaptive to needed memory size in a memory block chain table set aiming at the application program; in the sought memory block chain table, when the residual memory size of the node memory relative to the needed memory size is not lower than the preset lower limiting value of the node memory, allocating the memory equal to the needed memory in the node memory of one memory block to the application program, and classifying the residual memory into the target memory block chain table. According to the invention, the residual memory is classified into the target memory block chain table in which the node memory size is equal to the residual memory size, so that the memory fragments generated in the memory allocation process can be reasonably managed, and the memory utilization rate can be effectively increased.

The present invention belongs to the field of the geographic space information processing technology, and relates to a parallel mode grid image slicing method. The method provided by the invention comprises the following steps: the step 1: obtaining an original grid image, and setting a target tile grade and the total number of processes; the step 2: reading meta-data information of the original grid image; the step 3: converting the original grid image to WebMercator projection; the step 4: calculating the max grade and the mix grade of the tiles of the projection conversion result image; the step 5: calculating the range of the tile rank numbers of the projection conversion result image, and establishing an empty tile file; and the step 6: dividing tasks for each process through adoption of a wheel method; the step 7: reading tiles in each task pool one by one through each process, inversely calculating the geographical range with respect to the tiles, calculating the relative position and the size of an intersecting region in the projection conversion result image, and reading the original grid data of the intersecting region into a memory space; and the step 8: writing resampling data in built empty tile file after resampling the original grid data of the intersecting region.

The invention provides a memory management method, device and equipment and a computer readable storage medium. The method comprises the steps of obtaining a to-be-allocated shared memory type of a process request; acquiring a management area address of a shared memory pool corresponding to the to-be-allocated shared memory type from a shared memory chip pre-created in a memory; acquiring memory page configuration information of the shared memory pool from the shared memory chip according to the management area address; and dynamically allocating a shared memory unit for the process from the memory according to the memory page configuration information. According to the invention, the size of the shared memory pool can be zoomed according to actual requirements, so that the memory utilization rate can be improved, and the memory use requirements in actual services can be better met.

The invention discloses a realization method and a device of length-varying field memory of an imbedded database, which comprises: allocating a large memory block as an exclusive memory area of a length-varying field for each datasheet of a database, dividing the memory block into a plurality of BLOCKS with fixed sizes which are connected pre-and post through an index to form a BLOCK chain. When real length of a length-varying field is less than or equals to one BLOCK length, one BLOCK is allocated to store the length-varying field; when real length of a length-varying field is more than one BLOCK length, a plurality of BLOCKS are allocated to form a BLOCK chain to store the length-varying field. The invention can effectively solve the memory fragment problem and improves memory utility rate.

A method, apparatus, and article of manufacture for a multiple index combination system. A query is executed to access data stored on a data storage device connected to a computer. In particular, while accessing one or more single column indexes to retrieve partition invariant designators, multiple bit maps are generated and populated. As directed by the query predicate, the bit maps are combined into a single, global bit map. The global bit map directs the retrieval process to the required rows.

The invention provides a method for data storage, an apparatus and a device. The method comprises: after obtaining the target data to be stored in the memory and the data amount of the target data, according to the data amount, the target capacity specification of the memory block which can contain the target data and has the smallest remaining space is determined from a plurality of capacity specifications of the set memory block. At least one memory block combination with a total capacity not less than a data amount is constructed according to the plurality of capacity specification, the memory block combination comprises at least one memory block with a capacity specification and a number of memory blocks with each capacity specification, and the total numb of memory blocks in the memory block combination is a plurality of; determining a combination of target memory blocks with the smallest total capacity; when the total capacity of the target memory block combination is less than the capacity characterized by the target capacity specification, the target data is stored in a plurality of target memory blocks corresponding to the target memory block combination. The scheme of theinvention can reduce the memory fragmentation in the memory and improve the memory utilization rate.

The invention discloses a large-scale forest scene quick generation method based on space similarity. The method comprises the steps of 1) setting initialization parameters of a large-scale forest simulation scene, and acquiring scene distribution information of visible data and forest space of the whole scene; 2) partitioning the space data of the large-scale forest scene based on a quadtree, and dividing the scene into blocks with the same size; 3) calculating the space similarity of the forest scene; 4) judging the similarity between the scene blocks to quickly obtain biological amounts of plants; and 5) if the similarity between the scene blocks does not reach a certain proportion, calculating a growth model of the scene blocks, determining basic plants according to initial parameter data transmitted by a user, calculating an influence range and the biological amounts of the basic plants, then introducing a three-dimensional tree model into simulation for realizing the forest scene, and displaying a visible result to the user. The method is high in speed and high in precision.