OpenCL*

Error 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 kernels, I get a script error. On line 2863, character 98,  ":" was expected.

How can I fix the problem?

Thanks in advance

 

 

OpenCL drivers releases and bug report contact

Hello,

My company is in the process of validating our software against Intel OpenCL drivers (Xeon only, not Xeon phi)

We are currently relying on the 5.0.0.57 version for Linux and 5.1.0.25 for Windows.

Windows driver works like a charm, but we are struggling with instabilities using Linux 5.0.0.57 (Like kernels that work on a lot of other platforms (Including Intel's windows 5.1.0.25) crashing in a non deterministic fashion... Sometimes they work fine, sometimes not so good...)

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 this post is not one of those, but my research tells me otherwise. TL;DR clause: there appears to be a problem with get_global_size(dim) from the debugger.

Lets start by defining a simple kernel (emphasis on simple) - set the value of the array element in an in/out buffer to its associated linear index:

Memcpy 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)
{

/* Doing operation of Memcpy */

int2 coord_src = (int2)(get_global_id(0), get_global_id(1));

const sampler_t smp = CLK_FILTER_NEAREST | CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP_TO_EDGE;

uint4 pixel4 = read_imageui(YIn, smp, coord_src);

write_imageui(YOut, coord_src, pixel4);

}

I observe the below stats for Execution units:

Visual 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 project for Windows in C++ and I can build (Configuration: Debug Win32) and run it without any problem.

I have created a session, and Visual Studio always crashes when I try to use following options

Random 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 performance on the GPU compared to the CPU. When doing sequential reads and writes and even random writes, the performance is very similar indicating that both the internals of the chip as well as the memory controller allows the GPU to access the DRAM with the same speed the CPU does.

Linux: 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 Intel NUC5i3RYK. The first NUC is running CentOS 7.1 as described in the 'Intel Media Server Studio 2015 Getting Started Guide'. The second NUC is running a custom embedded Linux created using http://buildroot.uclibc.org/.

The good news:

OpenCL* abonnieren