Why the same code running on linux and windows differs so much (2X)
Hey: I just have run my opencl kernel on both windows 7 and kbuntu 12.10 that built in an autotool project. the project is developed under linux and then ported to windows using MingW64+Msys. My...
View ArticleAMD Compute-only cards like Tesla, no display port?
Are there AMD OpenCL cards that are purely for compute, no graphics output?I am not interested in the graphics part as these are intended for headless server farms.BTW is there a timeline for non-root...
View ArticleclBuildProgram performance?
I have a problem similar to this topic clBuildProgram performance and limits? I'm trying to compile OpenCL program on my 7850. It is strange that clBuildProgram takes 100s ms.When I using graphic card...
View ArticlePossible problem with atomic_cmpxchg?
Hi guys, I've been trying to write a kernel which multiplies a row vector into a CSR format stored matrix, but it gives a different result each time it runs. The GPU is AMD Radeon™ HD 7970 Graphics....
View ArticleBug- 100% CPU usage when >1 GPU installed & used
normally: 1 gpu installed & used = 1% cpu usageThis is very commonly talked about so its not just me and you likely already know about it.during opencl activity (btc mining) when i had 1 card...
View ArticleHandling event objects for synchronization points
Hello everyone, I'm quite new in the world of OpenCL and i have some things that I don't understand. I hope you can make things clearer.I would like to use some event objects for synchronization points...
View ArticleclEnqueueWriteImage
Hi forum, I created a 3D buffer using the clCreateImage3D(...) and then using the clEnqueueWriteImage(...) to copy the host memory to the device buffer. I am confused abut the computation of the...
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XCloseDisplay and clGetPlatformIDs
i catch segmentation fault in XCloseDisplay(display);If before it i call clGetPlatformIDs(0, NULL, &numPlatforms);I'm doing something wrong, or it's a bug?
View ArticleProblem with selection sort ( using C#.Net and OpenCL )
Hi everyoneI'm a somewhat noob in programming and completely new to OpenCL !I wrote some OpenCL code inside a C# Project ( using some online guide ) . its a selection sort but the problem is it won't...
View ArticleHello, just starting in OpenCL GPGPU for Neural Nets
Hi,I would like to make sure I'm starting on the right foot as I build my workstation and get developing. First the hardware: - Supermicro 7046GT-TRF X8DTG-QF workstation. Last gen pcie 2.0 GPU...
View Articleimage_channel_data_type
Hi forum, The number of bits per element is determined by image_channel_data_type. Is there any mechanism to check if the image type the application is dealing with has the invalid number of bits in...
View Article13.4 -save-temp compiler option doesn't do anything
Hi,Just as I got my system up to date with the latest driver, I noticed that -save-temp option is not doing anything. Is it removed or replaced with something else?OS: win7 64bit (I have to say good...
View ArticleWhich GPU should we buy?
Hi, we are doing some research about the GPU. We will try to implement some algorithms on the GPU. We do not know yet if the algorithmsreally fit for the GPU architecture. I did some research back in...
View ArticleKernel argument corrupted ? (maybe)
Hi, It seems i'm getting a kernel argument corruption,I dont clearly understand why and I can't reproduce it with nvidia cards. Here is the code, it's a small skeleton of ray casting algorithm using a...
View ArticleOpenCL elf kernel binary
Hi, I tried doing cat <kernel binary>, and I could see, AMDIL instruction set, however AMD isa was machine coded. Now, I can replace AMDIL part, with manually modified another IL code. and it...
View ArticleAccess Violation when clGetPlatformIDs is called
I downloaded AMD APP SDK 2.8 for win7 64bit(AMD-APP-SDK-v2.8-Windows-64.exe), and the 9.003 driver for a FirePro W7000 card from AMD website. When I run the samples from AMD APP SDK using VS 2010, for...
View ArticleBitwise OR operation failing when compiling for Tahiti GPU
Hi, I am currently coding part of MD5 algorithm inside a kernel code and I encountered a strange issue and even if I found some workaround for that, I would like to understand the rootcause... I tried...
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...
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OpenCL bug with HD 7790 (Bonaire)
Hello, I am hitting an odd bug running one of my OpenCL kernels on a new HD 7790. This is a kernel that I've verified on a HD 7770, and also on some Fermi and Kepler cards also. After a lot of...
View ArticleAny time schedule about next APP SDK (v2.9?) ?
Hello,Is there any time schedule about the next APP SDK version? It's been about 6 months since the previous version was released. Thank you.
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