SDAccel环境opencl源码在FPGA上_fpga_VHDL/FPGA/Verilog_嵌入式/单片机/硬件编程下载-pudn.com

Getting Started Examples ================================== This page contains examples for users who are new to Xilinx SDx OpenCL Flows. The focus of the examples is towards code optimization for Xilinx devices.The table lists various categories of examples in suggested order which users can follow. __Prerequisites__ - User is familiar with basics of OpenCL flow. - User has gone through SDx tutorial and is familiar with basics of tool functionality and terminology. S.No. | Category | Description --------|-----------|----------------------------------------- 1 | [host][] |OpenCL host code for optimized interfacing with Xilinx Devices 2 | [kernel_to_gmem][] |Kernel to Global Memory Access Optimization. 3 | [kernel_opt][] |Kernel Optimization for performance 4 | [dataflow][] |Kernel Optimization through Macro Level Pipelining 5 | [clk_freq][] |Improving Kernel Clock Frequency through Optimized code. 6 | [debug][] |Debugging and Profiling of Kernel. 7 | [rtl_kernel][] |RTL Kernel Based Examples 8 | [misc][] |OpenCL miscellaneous Examples 9 | [cpu_to_fpga][] |Labs to showcase the cpu to fpga conversion with kernel optimizations. __Examples Table__ Example | Description | Key Concepts / Keywords ---------------|-----------------------|------------------------- [host/concurrent_kernel_execution_ocl/][]|This example will demonstrate how to use multiple and out of order command queues to simultaneously execute multiple kernels on an FPGA.|__Key__ __Concepts__ - Concurrent execution - Out of Order Command Queues - Multiple Command Queues __Keywords__ - CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE - clSetEventCallback() [host/copy_buffer_ocl/][]|This Copy Buffer example demonstrate how one buffer can be copied from another buffer.|__Key__ __Concepts__ - Copy Buffer __Keywords__ - cl::CommandQueue::enqueueCopyBuffer() [host/data_transfer_ocl/][]|This example illustrates several ways to use the OpenCL API to transfer data to and from the FPGA|__Key__ __Concepts__ - OpenCL API - Data Transfer - Write Buffers - Read Buffers - Map Buffers - Async Memcpy __Keywords__ - enqueueWriteBuffer() - enqueueReadBuffer() - enqueueMapBuffer() - enqueueUnmapMemObject() - enqueueMigrateMemObjects() [host/device_query_ocl/][]|This example prints the OpenCL properties of the platform and its devices. It also displays the limits and capabilities of the hardware.|__Key__ __Concepts__ - OpenCL API - Querying device properties __Keywords__ - clGetPlatformIDs() - clGetPlatformInfo() - clGetDeviceIDs() - clGetDeviceInfo() [host/errors_ocl/][]|This example discuss the different reasons for errors in OpenCL and how to handle them at runtime.|__Key__ __Concepts__ - OpenCL API - Error handling __Keywords__ - CL_SUCCESS - CL_DEVICE_NOT_FOUND - CL_DEVICE_NOT_AVAILABLE [host/helloworld_ocl/][]|This example is a simple OpenCL application. It will highlight the basic flow of an OpenCL application.|__Key__ __Concepts__ - OpenCL API [host/host_global_bandwidth/][]|Host to global memory bandwidth test| [host/kernel_swap_ocl/][]|This example shows how host can swap the kernels and share same buffer between two kernels which are exist in separate binary containers. Dynamic platforms does not persist the buffer data so host has to migrate data from device to host memory before swapping the next kernel. After kernel swap, host has to migrate the buffer back to device.|__Key__ __Concepts__ - Handling Buffer sharing across multiple binaries - Multiple Kernel Binaries __Keywords__ - clEnqueueMigrateMemObjects() - CL_MIGRATE_MEM_OBJECT_HOST [host/multiple_devices_ocl/][]|This example show how to take advantage of multiple FPGAs on a system. It will show how to initialized an OpenCL context, allocate memory on the two devices and execute a kernel on each FPGA.|__Key__ __Concepts__ - OpenCL API - Multi-FPGA Execution - Event Handling __Keywords__ - cl_device_id - clGetDeviceIDs() [host/overlap_ocl/][]|This examples demonstrates techniques that allow user to overlap Host(CPU) and FPGA computation in an application. It will cover asynchronous operations and event object.|__Key__ __Concepts__ - OpenCL API - Synchronize Host and FPGA - Asynchronous Processing - Events - Asynchronous memcpy __Keywords__ - cl_event - clCreateCommandQueue - CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE - clEnqueueMigrateMemObjects [host/stream_access_ocl/][]|This is a simple example that demonstrates on how to process an input stream of data for computation in an application. It shows how to perform asynchronous operations and event handling.|__Key__ __Concepts__ - OpenCL API - Synchronize Host and FPGA - Asynchronous Processing - Events - Asynchronous Data Transfer __Keywords__ - cl::event - CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE [host/sub_devices_ocl/][]|This example demonstrates how to create OpenCL subdevices which uses a single kernel multiple times in order to show how to handle each instance independently including independent buffers, command queues and sequencing.|__Key__ __Concepts__ - Sub Devices __Keywords__ - cl_device_partition_property - createSubDevices - CL_DEVICE_PARTITION_EQUALLY [kernel_to_gmem/burst_rw_c/][]|This is simple example of using AXI4-master interface for burst read and write|__Key__ __Concepts__ - burst access __Keywords__ - memcpy [kernel_to_gmem/burst_rw_ocl/][]|This is simple example of using AXI4-master interface for burst read and write|__Key__ __Concepts__ - burst access [kernel_to_gmem/custom_datatype_c/][]|This is simple example of RGB to HSV conversion to demonstrate Custom DATA Type usages in C Based Kernel. Xilinx HLS Compiler Supports Custom Data Type to use for operation as well as Memory Interface between Kernel and Global Memory.|__Key__ __Concepts__ - Custom Datatype __Keywords__ - struct - #pragma HLS data_pack - #pragma HLS LOOP_TRIPCOUNT [kernel_to_gmem/custom_datatype_ocl/][]|This is simple example of RGB to HSV conversion to demonstrate Custom DATA Type usages in OpenCL Based Kernel. Xilinx HLS Compiler Supports Custom Data Type to use for operation as well as Memory Interface between Kernel and Global Memory.|__Key__ __Concepts__ - Dataflow - Custom Datatype __Keywords__ - struct [kernel_to_gmem/full_array_2d_c/][]|This is a simple example of accessing full data from 2d array|__Key__ __Concepts__ - 2D data full array Access [kernel_to_gmem/full_array_2d_ocl/][]|This is a simple example of accessing full data from 2d array|__Key__ __Concepts__ - 2D data full array Access [kernel_to_gmem/gmem_2banks_c/][]|This example of 2ddr to demonstrate on how to use 2ddr DSA. How to create buffers in each DDR.|__Key__ __Concepts__ - Multiple Banks __Keywords__ - max_memory_ports - misc:map_connect - cl_mem_ext_ptr_t - XCL_MEM_DDR_BANK0 - XCL_MEM_DDR_BANK1 - XCL_MEM_DDR_BANKx - CL_MEM_EXT_PTR_XILINX - HLS Interface m_axi bundle [kernel_to_gmem/gmem_2banks_ocl/][]|This example of 2ddr to demonstrate on how to use 2ddr DSA. How to create buffers in each DDR.|__Key__ __Concepts__ - Multiple Banks __Keywords__ - max_memory_ports - misc:map_connect - cl_mem_ext_ptr_t - XCL_MEM_DDR_BANK0 - XCL_MEM_DDR_BANK1 - XCL_MEM_DDR_BANKx - CL_MEM_EXT_PTR_XILINX [kernel_to_gmem/kernel_global_bandwidth/][]|Bandwidth test of global to local memory.| [kernel_to_gmem/memcoalesce_hang_c/][]|This example shows Memory Coalesce Deadlock/Hand situation and how to handle it. User can switch between BAD and GOOD case using makefile variable KFLOW.|__Key__ __Concepts__ - Memory Coalesce - Memory Deadlock/Hang - Multiple Interfaces __Keyword