clEnqueueMap/UnmapBuffer overheads
Can someone please straighten me out on expected clEnqueueMapBuffer overheads under Haswell?Environment: Windows 7 sp1, VS2013, i7-4770, driver 10.18.14.4170I have my own 768kb buffer which needs to be...
View ArticleHow to link to OpenCL binary library created with clLinkProgram...
Can someone please tell me how to link to the program library created in the following way:lib = clLinkProgram(context, NULL, NULL, "-create-library ", 1, &prog, NULL, NULL, &err);I can happily...
View ArticleWhich SDK do I need to download ? (
Hi, Im running on Intel® Core™ i5-480M Processor , which has internal GPU:Chip Type: intel(R) HD Graphics (Core i5)Dac Type: InternalAdapter String: Intel(R) HD GraphicsBios Information: Intel Video...
View ArticlePrecompiling binaries without Intel hardware
Hi,I have a project using OpenCL code.As part of the packaging we embed the binaries for the OpenCL platforms we want to support. Unfortunatelly without the Intel HD present on the machine we did not...
View ArticleNo GPU for OpenCL on P4600?
GreetingsI'm probably just missing something simple, but I'm having an issue with using the GPU with OpenCL under 64-bit Windows 7 on an Intel Z230 with P4600 graphics. I installed Intel INDE 2015...
View ArticleIntel OpenCL with an NVidia GPU?
Hi all,I saw an earlier post saying that you cant run programs on an Nvidia GPU using Intel OpenCLhttps://software.intel.com/en-us/forums/topic/370060 So I just wanted to ask whether this is still true...
View ArticleMaximum memory for GEN is only 80 MB ?
Is the maximum size for OpenCL only 80 MB ?First, CPU allocates the memory using aligned_malloc(). CPU then does some processing on the memory, then OpenCL kernel is executed on GEN GPU. Before OpenCL...
View ArticleShared memory vs Texture memory
I am writing deinterlacing code in Opencl. I am reading the pixels using read_imageui() API in the local memory.Just like the code at:...
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Wrong calculation results on Intel(R) HD Graphics 4600
Hi,I've found what seems to be a bug in the OpenCL driver for Intel HD 4600 graphics core. The code I am attaching produces correct results on Intel CPU or NVidia GPU OpenCL targets but at the same...
View ArticlePower consumption (Watt)
Hi,I look for a software measurement tool or an API I can include to know my kernel power consumption during execution on GPU. How can I do that?Thanks
View Articletwo similar programs: one finds the gpu, one doesn't.
Hi all, I'm having issues after upgrading from 10.18.10.3621 to 10.18.14 4206, on Lenovo x240 Haswell machine, Win8 and visual studio 2012 with the matching vc++ compiler 11, debug win32 config....
View ArticleLinux: clCreateContext fails on embedded Linux device
Hello everybody,I'm in the process of evaluating the combination of the Intel Media SDK + OpenCL on Linux (using the latest Release of 'MediaServerStudioEssentials2015R6'). For my tests I'm using two...
View ArticleRandom memory read performance difference between GPU and CPU (I7-4770R)?
We are running a simple code doing random reads and sequential write (i.e. gather operation) on both the CPU and GPU part of the I7-4770R (separately, one at a time) and experiencing 4x slower...
View ArticleVisual Studio Community 2013 crashes when building program from Code-builder
I am using Visual Studio Community 2013 Version 12 Update 4 and OpenCL Code Builder 1.4.0.25 on 64-bit laptop (Windows 8.1, Intel Core i5-5200U and GPU HD Graphics 5500).I have created a Code Builder...
View ArticleMemcpy performance using opencl kernel
Hi,I have written a simple memcpy kernel as written below:I am analyzing its performance on GPU using vtune.__kernel void deinterlace_Y(__read_only image2d_t YIn, __write_only image2d_t YOut) { /*...
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Bug in OpenCL Code Builder's Debugger
To start this post off, I would like to say that I do not take the term "bug" lightly - it gets thrown around on the internet often, but usually when someone does not understand the tool set. I hope...
View ArticleError when I run occupancy for kernels
I am using Visual Studio Community 2013 Version 12 Update 4 and OpenCL Code Builder 1.4.0.25 on 64-bit laptop (Windows 8.1, Intel Core i5-5200U and GPU HD Graphics 5500).When I try to run occupancy for...
View ArticleWhich tools are needed to develop openCl code for Intel Iris Pro 6200 Graphics
I want to develop openCl code that will work on Intel Iris Pro 6200 or 6300. I want to know the tools that support openCl for this device.
View ArticleclSetEventCallback Oddity
I suspect there's an aspect of clSetEventCallback that I'm misunderstanding. If you have a look at this simplified code below, you can see a kernel call, followed by a clSetEventCallback. The program...
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