opencl

从OpenCL说开

由 ￣綄美尐妖づ 提交于 2020-02-02 20:00:04
刚弄到一份OpenCL Specification中文版…… 翻译上好乱 = = 不过总的来说还算清晰。 至少对我这种连二把手都算不上的人来说好理解。 不过怎么看OpenCL的Memory Modle和CUDA那么像呢 = = 不知道这么设计的好处主要在哪里。Gobal和Local分开我能理解，Local之间为什么都分成2层？ 别告诉我是学CPU的……这个不和命中率有关系么 = = 其他方面到还是区别挺大的，至少CUDA很少用动态编译之类的 恩，某人是不是就是JIT的？怎么在不同的Platform下二进制都不一样呢？ 这样可不好哦。 话说OpenGPU有个高人写了个文章，还在对照OpenCL规范和CUDA 3.0 编程手册对照中 地址： http://www.opengpu.org/bbs/viewthread.php?tid=2431 就当是广告了吧 ^_^ 有点跑了。而且有点水。就这样吧。 另： 由于Live Writer无法自动打开摘要功能，为了节约版面，以后本人的文章将会尽量减少字数。 我还要将就cnBlogs这个好复杂的发布系统 = = 来源： https://www.cnblogs.com/edge/archive/2010/04/27/1722516.html

Visual studio 14.0 LNK2001 (unresolved external symbol ) with OpenCL

由 一笑奈何 提交于 2020-02-02 16:29:02
问题 I am new to OpenCL. When I tried the examples from the website of Altera, I got several LNK2001 errors as follows Severity Code Description Project File Line Error LNK2001 unresolved external symbol __imp_sprintf hello_world C:\Users\S_KW\OpenCL\hello_world\alteracl.lib(acl_hal_mmd.obj) 1 Error LNK2001 unresolved external symbol __imp___iob_func hello_world C:\Users\S_KW\OpenCL\hello_world\alteracl.lib(acl_hal_mmd.obj) 1 Error LNK2001 unresolved external symbol __imp_fprintf hello_world C:

Visual studio 14.0 LNK2001 (unresolved external symbol ) with OpenCL

由 我的未来我决定 提交于 2020-02-02 16:27:57
问题 I am new to OpenCL. When I tried the examples from the website of Altera, I got several LNK2001 errors as follows Severity Code Description Project File Line Error LNK2001 unresolved external symbol __imp_sprintf hello_world C:\Users\S_KW\OpenCL\hello_world\alteracl.lib(acl_hal_mmd.obj) 1 Error LNK2001 unresolved external symbol __imp___iob_func hello_world C:\Users\S_KW\OpenCL\hello_world\alteracl.lib(acl_hal_mmd.obj) 1 Error LNK2001 unresolved external symbol __imp_fprintf hello_world C:

linux下编译支持opencl的opencv for android

由 末鹿安然 提交于 2020-02-01 11:36:13
主要的步骤其他人已经写过，请参考这篇： https://www.cnblogs.com/hrlnw/p/4720977.html 操作的细节请参考附件的pdf: https://files.cnblogs.com/files/ahfuzhang/opencvwithopencl4androidndk-141129030940-conversion-gate02.pdf.zip 用于测试的代码如下： //jpg2gary.cpp #include <inttypes.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/time.h> #include <opencv2/core.hpp> #include <opencv2/opencv.hpp> #include <opencv2/core/ocl.hpp> #include <fstream> #ifndef P #define P(format, ...) \ do { \ printf("%s %s %d " format "\n", __FILE__, __FUNCTION__, __LINE__, \ ##__VA_ARGS__); \ fflush(stdout); \ } while (0); #endif void

Python-OpenCV解决报错 OpenCL error CL_MEM_OBJECT_ALLOCATION_FAILURE (-4)

由 走远了吗. 提交于 2020-01-26 16:11:11
cv2.error: OpenCV(4.0.0) C:\projects\opencv-python\opencv\modules\core\src\ocl.cpp:5407: error: (-220:Unknown error code -220) OpenCL error CL_MEM_OBJECT_ALLOCATION_FAILURE (-4) during call: clEnqueueWriteBuffer(q, handle=000002028E579EB0, CL_TRUE, offset=0, sz=186432, data=000002023B951860, 0, 0, 0) in function 'cv::ocl::OpenCLAllocator::upload' cap_msmf.cpp (674) SourceReaderCB::~SourceReaderCB terminating async callback 这个错误我解决了一下午，给大家提供几个解决思路 版本不适配问题，出现这个问题时，我既使用了tensorflow_gpu + CUDA，同时也使用了Opencv中的ocl库，即OpenCL。大家跑代码，尤其是轮子的时候一定注意调整版本号。 这个错误对应的warning其实是无关的，SourceReaderCB terminating async

Correct way to setup and tear down an openCL unit test in a test suite?

由 社会主义新天地 提交于 2020-01-25 21:25:07
问题 Quick note: I am using JOCL and Java for my openCL development. I think the calls to openCL that I need will be the same as if I was just using C or C++. My problem is that I want to be able to run each of my tests as if it were the first thing the GPU runs after being initialised. Here is my code: protected cl_context clContext; protected cl_command_queue commandQueue; @Before public void setUp() { clContext = createContext(); cl_device_id devices[] = getGPUDevices(clContext); commandQueue =

Small array stored like variables in a kernel?

由 落花浮王杯 提交于 2020-01-25 18:40:06
问题 In my OpenCL kernel I need to use what should normally be a small array of 4 entries, but because of my concerns over how that array would be stored (probably in a much slower kind of memory than regular variables) I'm instead using 4 separate variables and a switch-case statement to access the correct one based on an index. Is there a way to make a small array of 4 x float4 work as fast and seamlessly as 4 separate float4 variables? Here's what I'm trying to do: my kernel is meant to

how to know pixel color using t_sampler in jocl

由 血红的双手。 提交于 2020-01-25 12:59:04
问题 I want to detect peaks in a binary image using jocl. The definition of my peak is a combinition of colered pixels (shown in the image) how to use t_sampler to know pixel color? const sampler_t smp = CLK_NORMALIZED_COORDS_FALSE | //Natural coordinates CLK_ADDRESS_CLAMP | //Clamp to zeros CLK_FILTER_NEAREST; //Don't interpolate PS: my image is a binary image 来源： https://stackoverflow.com/questions/38340383/how-to-know-pixel-color-using-t-sampler-in-jocl

Zero Copy Buffers using cl_arm_import_memory extension in OpenCL 1.2 - arm mali midgard GPUs

由 女生的网名这么多〃 提交于 2020-01-25 02:48:52
问题 I wish to allocate a vector and use it's data pointer to allocate a zero copy buffer on the GPU. There is this cl_arm_import_memory extension which can be used to do this. But I am not sure wether its supported for all mali midgard OpenCL drivers or not. I was going through this link and I am quite puzzled by the following lines : - If the extension string cl_arm_import_memory_host is exposed then importing from normal userspace allocations (such as those created via malloc) is supported.

Zero Copy Buffers using cl_arm_import_memory extension in OpenCL 1.2 - arm mali midgard GPUs

由 ◇◆丶佛笑我妖孽 提交于 2020-01-25 02:48:47
问题 I wish to allocate a vector and use it's data pointer to allocate a zero copy buffer on the GPU. There is this cl_arm_import_memory extension which can be used to do this. But I am not sure wether its supported for all mali midgard OpenCL drivers or not. I was going through this link and I am quite puzzled by the following lines : - If the extension string cl_arm_import_memory_host is exposed then importing from normal userspace allocations (such as those created via malloc) is supported.
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