Max Read Bandwidth of Trinity APU
Hi, I have got a bandwidth question. I got an A10-5800k Trinity APU and I use OpenCL with the integrated GPU Radeon HD 7660D.Also, I use the Asus F2 A85-M Pro motherboard and 4x 8GB 1866 MHz ram. OS is...
View ArticleDoes Radeon HD7670M supporting OpenCL?
Hi, i got a Radeon HD6520G + HD7670M Dual Graphics laptop, and I need OpenCL support to BitCoin, can I install SDK or something to fix it?
View ArticleHow to implement cl_khr_icd?
Hi, I want to run my application on both intel CPU and nvidia GPU. As I read some other posts, I clearly understood that I need 2 SDK for this configuration so I chose : AMD SDK and NVIDIA SDK. A part...
View ArticleCALtargetEnum
Well I need a newer "list" of CAL-target-IDs. Inside current AMD_Accelerated_Parallel_Processing_OpenCL_Programming_Guide.pdf at page 230 is: typedef enum CALtargetEnum {CAL_TARGET_600 = 0, /**<...
View Articlenative kernel - example
Hi folks, I am sure if i missed it or not, i have not found any examples of native kernels so far in any book. Can any one point me to any ? How they differ between OpenCL kernels and native kernels ....
View ArticleIs it possible to pass a kernel an array of memory buffers as an argument ?
I have a for loop (host side) which calls the same kernel many times, such that for each call an input and output buffers are passed as kernel arguments.Using the AMD profiler, it turns out that there...
View ArticleHow implementation treats NULL in local workgroup dims ?
For example, let suppose I have kernel with global size of 1024 (single dim). And pass NULL as local workgroup dim.Also let suppose my GPU has 20 CUs.How implementation will distribute 1024/64=16...
View ArticleVideo Card for Linux
I am using Ubuntu 12.04, and I recently tried OpenCL and PyOpenCL on GTX 680, HD 7790 and HD 7870 XT. The Nvidia linux driver for GTX 680 works, but slowly (cannot run at full clock). The AMD driver...
View ArticleDMA with AMD A10 APU?
I have a functioning OpenCL application right now that uses 2 command queues so that I can run a kernel and DMA transfer data concurrently. It works with multiple systems that use discreet GPUs (NVidia...
View ArticleBacktrack 5 problem with ATI drivers
I have a problem with the graphics ATI Radeon HD 5450 can not seem to install the driver on BackTrack 5 R3. I do everything right, but we only report an error that does not support graphic .. I took...
View Articleopencl program to find sum of array
hi....i need to write sum of array opencl program for my thesis.........i studied reduction example form amd samples..........i have no idea why my code is giving wrong output.......please someone help...
View ArticleAMD 79xx GPUs skip kernel execution for certain indices
I'm experiencing a strange problem that occurs on 7950 and 7970 cards, but does not happen on 5850 and 6870. My application processes images in tiles. For each tile a series of OpenCL kernels is...
View ArticleCat13.4: How to avoid the high CPU load for GPU kernels?
Hi, since 13.4 and 13.5 beta, my OpenCL GPU program consumes ~80% of one CPU core while in clFinish, waiting for a string of GPU kernels and a final clEnqueueReadBuffer. My main thread looks like...
View ArticleAMD Radion Mobility 5870 low level details
Hello,I am looking for the lowest level hardware details that I can get for some GPGPU research that I am doing.I have seen the specs for the hardware and I'd like to know more than they tell me.For...
View ArticleOffline OpenCL compilation on Linux
We compile OpenCL code offline and ship applications with precompiled binaries for supported devices. Building is done on a virtual machine that obviously does not have AMD hardware. However, prior to...
View Articlesubmit-to-start latency
With nothing in the queue, my typical kernels have a 1/2 to 1 millisecond latency between CL_PROFILING_COMMAND_SUBMIT and CL_PROFILING_COMMAND_START.This makes up for a large amount of my total run...
View ArticleOpenCL context creation
Hi forum, For OpenCL - OpenGL interoperability, i believe you need to create the GL context first before initializing the OpenCL context. And i am doing the same , but i failed the create the OpenCL...
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Concurrent kernel execution between CPU and GPU
Hi. I am trying to verify simple heterogenous computing using a CPU and a GPU using OpenCL. The Kernel function is a simple BLAS level 1 saxpy (single-precision, scalar multplication and vector...
View ArticleWhat's wrong with this file?
THIS CODE IS FROM A PROGRAM CALLED BLENDER CYCLES...IT WORKS...BUT DOESN'T WORK WITH THE AMD OPENCL COMPILER,...IN THE BLENDER COMMUNITY SOME BELIEVE THAT THIS CODE IS PROGRAMMED USING CUDA SYNTAX,...
View ArticleWrite to GPU persistemt memory vs copy from pinned memory -what better?
I need to pass few arrays of size <~128kB to GPU. Cause CPU should only write these arrays and not read them, I think that 2 ways possible1) create buffers on GPU with AMD_PERSISTENT flag. Map them...
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