OpenCL Callback freezed in Intel GPU (hangs) - deadlock? pthread_cond_wait
Hello,Expected behavior (only occurs in the CPU, not in the IGPU): 1. The host creates an user event. Then, the host calls a EnqueueKernelNDRange (vector addition) and waits for the user event...
View Articleskipping incompatible OpenCL.lib when searching for -lOpenCL
The path for my OpenCL libraries is:/cygdrive/c/Program Files (x86)/Intel/OpenCL SDK/6.3/lib/x86Accordingly, the line in my Makefile is:LIBS=-L/cygdrive/c/"Program Files (x86)"/Intel/"OpenCL...
View ArticleDoes the intel-drm support the SVM through the IOMMU and PASID?
Hi, I am a newbie on the intel-gfx and tries to use the shared virtual memory which is mentioned in several intel documents (vt-d and Intel-gfx-prm).Following the above two documents,shared virtual...
View ArticleIncompatibility between OpenJDK and Intel OpenCL SDK for CPUs on Linux
I have a Java/Scala application where several threads map and unmap (disjunct) OpenCL buffers at the same time. With OpenJDK and the Intel OpenCL implementation for CPUs it sometimes crashes on Linux...
View Articlewhere is opencl debugger settings in vs 2010?
Dear Forum,I just want to ask a very simple question: where can I find the opencl debugger dialog in visual studio 2010. There is no code builder tab in vs2010 as well as I could not find it under the...
View ArticleOpenCL CPU runtime won't install even if Intel GPU driver doesn't include OpenCL
Take for example SandyBridge Windows 10 inbox driver - 9.17.10.4459. Even if inbox drivers for at least older iGPUs if not all never include an OpenCL CPU runtime, the OpenCL CPU runtime 16.1.1 refuse...
View ArticleInstallation OpenCL 2.0 for Skylake 6200u and Ubuntu 17.10 (Kernel 4.10)
Hi,from https://software.intel.com/en-us/articles/opencl-drivers#latest_linux_driver I downloaded OpenCL™ 2.0 GPU/CPU driver package for Linux* (64-bit) and there is a patch for Linux Kernel 4.7...
View ArticleIntel Open Sources OpenCL Deep Neural Network Library for Intel GPUs
Intel Open Sources OpenCL Deep Neural Network library for Intel GPUsThe Intel Compute Library for Deep Neural Networks (clDNN) is an open source performance library for Deep Learning (DL) applications...
View ArticlePerformance of OpenCL devices: Intel CPU vs. Intel HD graphics vs. NVIDIA...
*** Performance of OpenCL devices: Intel CPU vs. Intel HD graphics vs. NVIDIA Quadro K1000M ***
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structs and compiler optimizations
Hello,I have a question concerning the usage of structs. My current kernel accesses two buffers using a struct in the following way:struct pair { float first; float second; }; inline const float...
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Can't get default device queue after clRetain* and clRelease
Hi,I can't get default device queue using clGetCommandQueueInfo(.., CL_QUEUE_DEVICE_DEFAULT, ..) if before that command I increase and decrease reference counter of that default device queue. I get...
View ArticleOpenCL overhead on empty kernel
Hello,I am currently comparing my own implemention of GEMV in OpenCL to the MKL. I am benchmarking very small input sizes like 2x64 for example. On my system the MKL runs around 0,001ms for this input...
View ArticleApollo Lake (Broxton) Legacy Mode -- what to assume when programming?
I see that an 18 EU Apollo Lake SKU like the N4200 may appear as either 3 sub-slices of 6 EUs (with 6 hardware threads per EU) *or* as 2 virtual sub-slices of 9 EUs.As a developer, what should my...
View ArticleAbout AVX512 OpenCL CPU support for Core i9 7900x and Intel OpenCL 2017 release
Hi,just seeing reviews of Intel 7900x seems has new AVX512 instructions and each core has 2 AVX512 FMA units at least on Core i9 there is a doubt if 7800x and 7820x has only 1FMA AVX512..anyway seems...
View ArticleXeon Phi (Knights Landing) on Ubuntu 17.04 with OpenCL
Hi!I wanted to ask the help of the community (or corporate devs) to debug an issue with running OpenCL apps on Knights Landing processors on an Ubuntu Server 17.04. The OS installs fine (some hardships...
View ArticlePossible bugs in GT2 Desktop driver
Hi,I have discovered several cases where programs compiled and executed on HD Graphics Haswell GT2 Desktop produce different output to on other OpenCL implementations. Please see attached bug reports,...
View ArticleOpencl implementation of convert_char()
I am using Intel core i7 6820HQ CPU and integrated graphics 530 to run an opencl application.When I perform convert_char() on overflowed results, I get different results in CPU and GPU.E.g...
View ArticleCode builder OpenCL 2.0 Unable to assign pipe variable
The following OpenCL 2.0 kernel compiles in code builder using the OpenCL code builder eclipse plug in. But it does not seem possible to assign pipe to the variable out. __kernel void example...
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INVALID_KERNEL_ARGS bug when using SPIR-V kernels
Hello together,I am encountering a bug, when I try to use SPIR-V kernels with more than 1 parameter with the Intel® SDK for OpenCL™ Applications 2016 R3. Tested on 2 different platforms: OS: Ubuntu...
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