opencl

How to pass a list of strings to an opencl kernel using pyopencl?

由 给你一囗甜甜゛ 提交于 2019-12-01 09:48:29
问题 How to pass list of strings to an opencl kernel the right way? I tried this way using buffers (see following code), but I failed. OpenCL (struct.cl): typedef struct{ uchar uc[40]; } my_struct9; inline void try_this7_now(__global const uchar * IN_DATA , const uint IN_len_DATA , __global uchar * OUT_DATA){ for (unsigned int i=0; i<IN_len_DATA ; i++) OUT_DATA[i] = IN_DATA[i]; } __kernel void try_this7(__global const my_struct9 * pS_IN_DATA , const uint IN_len , __global my_struct9 * pS_OUT){

how to create do offline compilation in opencl and create its binary?

由 元气小坏坏 提交于 2019-12-01 08:46:44
In online compilation of OpenCl, we have to do... program = clCreateProgramWithSource(context, 1, (const char **)&source_str, (const size_t *)&source_size, &ret); But, for offline creation of program for opencl.. program = clCreateProgramWithBinary(context, 1, &device_id, (const size_t *)&binary_size, (const unsigned char **)&binary_buf, &binary_status, &ret); where binary_buf is... fread(binary_buf, 1, MAX_BINARY_SIZE, fp); Hence in offline compilation, we can skip the clBuildProgram step, which makes this step faster. (Is this approach correct, that we can re-use again and again that binary

How to type-cast char* to int* in openCL

由 佐手、 提交于 2019-12-01 07:42:15
问题 Can any one tell me how to typecast a char* pointer to int* in OpenCL kernel function?? I tried ((int*) char_pointer) but it is not working. 回答1: You have to qualify the pointer with the correct address space, I think. If you don't specify the address space, __private is assumed, but your source pointer seems to be a __global pointer (from your comment), so the address spaces are incompatible. So try to use (__global int*) instead of just (int*) . 回答2: Stuff the pointers in a union,

OpenCL float sum reduction

由 最后都变了- 提交于 2019-12-01 06:43:48
I would like to apply a reduce on this piece of my kernel code (1 dimensional data): __local float sum = 0; int i; for(i = 0; i < length; i++) sum += //some operation depending on i here; Instead of having just 1 thread that performs this operation, I would like to have n threads (with n = length) and at the end having 1 thread to make the total sum. In pseudo code, I would like to able to write something like this: int i = get_global_id(0); __local float sum = 0; sum += //some operation depending on i here; barrier(CLK_LOCAL_MEM_FENCE); if(i == 0) res = sum; Is there a way? I have a race

how to create do offline compilation in opencl and create its binary?

由 白昼怎懂夜的黑 提交于 2019-12-01 06:34:43
问题 In online compilation of OpenCl, we have to do... program = clCreateProgramWithSource(context, 1, (const char **)&source_str, (const size_t *)&source_size, &ret); But, for offline creation of program for opencl.. program = clCreateProgramWithBinary(context, 1, &device_id, (const size_t *)&binary_size, (const unsigned char **)&binary_buf, &binary_status, &ret); where binary_buf is... fread(binary_buf, 1, MAX_BINARY_SIZE, fp); Hence in offline compilation, we can skip the clBuildProgram step,

Deploying OpenCL application?

由 回眸只為那壹抹淺笑 提交于 2019-12-01 06:26:47
I am currently learning OpencL and am finding it somewhat difficult to understand how it actually works. I am using MinGW compiler with ATI APP SDK. When I run the target I get error message I have not placed any OpenCL.dll in the same folder as my application. Now searching a bit on Windows I can find this dll in C:/Windows/SysWOW64 C:/Windows/System32/DriverStore/... C:/Windows/System32 C:/Program Files(x86)/AMD APP SDK /... So my question is how should I deploy my application? Should I distribute OpenCL.dll with my application? The reason why your application can't find clReleaseDevice is

My opencl test does not run much faster than CPU

由 浪子不回头ぞ 提交于 2019-12-01 06:02:39
问题 I am trying to measure the execution time of GPU and compare it with CPU. I wrote a simple_add function to add all elements of a short int vector. The Kernel code is: global const int * A, global const uint * B, global int* C) { ///------------------------------------------------ /// Add 16 bits of each int AA=A[get_global_id(0)]; int BB=B[get_global_id(0)]; int AH=0xFFFF0000 & AA; int AL=0x0000FFFF & AA; int BH=0xFFFF0000 & BB; int BL=0x0000FFFF & BB; int CL=(AL+BL)&0x0000FFFF; int CH=(AH+BH

Deploying OpenCL application?

由 跟風遠走 提交于 2019-12-01 05:21:03
问题 I am currently learning OpencL and am finding it somewhat difficult to understand how it actually works. I am using MinGW compiler with ATI APP SDK. When I run the target I get error message I have not placed any OpenCL.dll in the same folder as my application. Now searching a bit on Windows I can find this dll in C:/Windows/SysWOW64 C:/Windows/System32/DriverStore/... C:/Windows/System32 C:/Program Files(x86)/AMD APP SDK /... So my question is how should I deploy my application? Should I

is it possible to execute OpenCL code on ARM CPU (Cortex-a7) using the Mali OpenCL SDK?

由 会有一股神秘感。 提交于 2019-12-01 04:58:37
问题 Mali OpenCL SDK allows executing opencl code on the Mali GPU. Is it possible to execute OpenCL code on ARM CPU (Cortex-a7) using the Mali OpenCL SDK? 回答1: Not at present - ARM have only publicly released drivers that support OpenCL on Mali GPUs. However, a couple of months ago they passed conformance for OpenCL running on an ARM CPU, so one might expect that this will be possible in the future: (from the Khronos conformant products page) ARM Limited 2014-06-13 OpenCL_1_1 Linux 3.9.0 with ARM

Does NVidia support OpenCL SPIR?

由 荒凉一梦 提交于 2019-12-01 03:54:44
I am wondering that whether nvidia supports spir backend or not? if yes, i couldn't find any document and sample example about that. but if not, is there a any way to work spir backend onto nvidia gpus? thanks in advance Since SPIR builds on top of OpenCL version 1.2, and so far Nvidia has not made any OpenCL 1.2 drivers available, it is not possible to use SPIR with Nvidia GPUs. As mentioned in the comments, Nvidia has made PTX available as intermediate language (also based on LLVM IR). One could consider translating SPIR into PTX but I don't know how realistic that would be. Other vendors
订阅 opencl