42results about How to "Improve Parallel Processing Efficiency" patented technology

A parallel data processing method based on multiple graphic processing units (GPUs) is provided, including: creating, in a central processing unit (CPU), a plurality of worker threads for controlling a plurality of worker groups respectively, the worker groups including one or more GPUs; binding each worker thread to a corresponding GPU; loading a plurality of batches of training data from a nonvolatile memory to GPU video memories in the plurality of worker groups; and controlling the plurality of GPUs to perform data processing in parallel through the worker threads. The method can enhance efficiency of multi-GPU parallel data processing. In addition, a parallel data processing apparatus is further provided.

The invention discloses a method, a device and a mobile terminal for checking the impact of cache file deletion. The method includes: obtaining a program to be checked, and obtaining a set of click paths and a set of cache paths corresponding to the program to be checked, wherein the set of click paths includes: Multiple click paths, the cache path set includes multiple cache paths, each click path set corresponds to a cache path; obtains a cache path to be verified in the cache path set, and deletes the cache path to be verified in the cache path to be verified file; simulate clicking on the program to be verified according to the click path corresponding to the cache path to be verified; and obtain the deletion effect of the cache file to be verified according to the running result of the program to be verified. The method of the embodiment of the present invention can realize automatic detection of whether the deleted cache file has an influence on the program only by simply adding equipment, thereby improving the parallel processing efficiency and reducing the labor cost.

The invention relates to a configurable matrix register unit for supporting multi-width single instruction multiple data stream (SIMD) and multi-granularity single instruction multiple threads (SIMT). The configurable matrix register unit comprises a matrix register and a control register SR; the matrix register of which the size is N*N is divided into M*M blocks, wherein N is a positive integer and is the power of 2, and M is an integer which is more than or equal to 0 and is the power of 2; the block modes of the matrix register and the multi-thread numbers simultaneously processed by a vector processing unit are recorded in the control register; and the width of the control register is log2C+log2T, wherein C is the number of the number of the block modes of the matrix register, and T is the number of multi-thread modes which can be processed by a vector processor. The configurable matrix register unit has the advantages that: the principle is simple; the configurable matrix register unit is simple and convenient to operate; the block size and the thread number can be configured flexibly; the access to vector data in the mode of multi-width SIMD and multi-granularity SIMT is supported at the same time and the like.

The invention relates to the field of parallel computation application technology and the field of high-performance scientific computation, in particular to an octree parallel construction method for visual reconstruction of CT slice data with a TB-level data processing ability. According to the method, octree parallel construction is performed based on an MPI+OpenMP parallel programming model by use of the characteristics of mesh generation of original volume data, non-dependency of octree node data, etc. based on the scheme of "construction on demand-Branch on need Octrees, BONOs" according to actual three-dimensional size of the volume data; on the one hand, waste of computation resources and storage resources and I / O expenditure in the construction process are reduced; and on the other hand, rapid octree data structure construction of the TB-level CT slice data is realized by means of parallel computation, and the MPI+OpenMP parallel programming technology meets the requirement for rapid construction of an octree data structural body of the TB-level CT slice data under different resolution requirements. The method has a good parallel speedup ratio and good parallel efficiency.

The invention discloses a method for maintaining a distributed dynamic two-layer forwarding table, including the training, query and aging process of the forwarding table. The training of the forwarding table includes: S1) external input of true random numbers; S2) receiving source address and Virtual local area network SA_vlan; S3) Hash the true random number and SA_vlan to calculate the address to be written; S4) The signal instruction of the entry corresponding to the address is transmitted downward; S5) If the entry to be written is set If it is invalid, the entry will not be written, otherwise, write SA_vlan into the entry in the sel circuit; S6) Hash the destination address DA_vlan and the true random number to obtain the address of the entry, and then read out the address to be queried forwarded port. Multiple small forwarding tables in the present invention adopt the same hash calculation rule, and form different hash maps with different true random numbers, so as to obtain a load rate much higher than that of a unified forwarding table, and greatly save FPGA Precious BRAM resources inside.

The invention provides an automobile chassis with an accumulated snow ball compressing transmission device, and belongs to the technical fields of environmental protection, mechanical transmission, road accumulated snow removal equipment and the like. An opening is formed in an automobile chassis body, the accumulated snow ball compressing transmission device is installed in the opening, and is composed of a snow ball integrating unit, an accumulated snow ball ejecting unit, an inclined plane transmission unit, a rolling wheel set, a snow ball integrating driving unit, a snow ball ejecting driving unit, a rolling wheel set driving unit and an accumulated snow ball collection unit. According to the automobile chassis with the accumulated snow ball compressing transmission device, the functions of transmission and collection of accumulated snow can be realized.