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c0d3x

Member

From: Berlin

Registered: 2016-05-01

Posts: 7

clCreateContext Segmentation fault on arch linux with intel i7cpu

Hi,

The Subject describes my problem by the facts i know about it. I am totaly newbe to this topic and can not figure out whats the problem because in my simple testprogramm the cl device and version is printed out correctly but creating a context results in segfault.

I have allready try to build in 32bit mode but same result.

I attached the simple test programm and the corresponding cmake file that i used to build.

my installed packages are the following

intel-opencl-runtime 1:16.1-1
   OpenCL runtime for Intel Core and Xeon processors

intel-opencl-sdk 2016-5
   Intel SDK for OpenCL Applications

ocl-icd 2.2.9-1
   OpenCL ICD Bindings

opencl-headers 2:2.1.20151224-1
   OpenCL (Open Computing Language) header files

my simple testprogramm gives infos about the cpu as follows:

Using platform : Intel(R) OpenCL

Using device : Intel(R) Core(TM) i7 CPU L 640 @ 2.13GHz

OpenCL version : OpenCL C 1.2

here is the test program

#include <iostream>

#define __CL_ENABLE_EXCEPTIONS
#include <CL/cl.hpp>

int main(int argc, char** argv)
{

    std::vector<cl::Platform> all_platforms;
    cl::Platform::get(&all_platforms);

    if(all_platforms.size()==0){
        std::cout<<" No platforms found. Check OpenCL installation!\n";
        exit(1);
    }

    cl::Platform default_platform=all_platforms[0];

    //get default device of the default platform
    std::vector<cl::Device> all_devices;
    default_platform.getDevices(CL_DEVICE_TYPE_ALL, &all_devices);

    if(all_devices.size()==0){
        std::cout<<" No devices found. Check OpenCL installation!\n";
        exit(1);
    }

    cl::Device default_device=all_devices[0];

    std::cout << "Using platform  : " << default_platform.getInfo<CL_PLATFORM_NAME>()<<"\n";
    std::cout << "Using device    : " << default_device.getInfo<CL_DEVICE_NAME>() <<"\n";
    std::cout << "OpenCL version  : " << default_device.getInfo<CL_DEVICE_OPENCL_C_VERSION>() <<"\n";

    try {
        cl_context_properties cps[3] = {
               CL_CONTEXT_PLATFORM,
               (cl_context_properties)(all_platforms[0])(),
               0
           };

        cl::Context context(CL_DEVICE_TYPE_CPU, cps);

    } catch(cl::Error error) {
        std::cout << error.what() << "(" << error.err() << ")" << std::endl;
    }

    return 0;
}

and here the cmake file

project(OpenCLTest)
cmake_minimum_required(VERSION 2.8.12)

set(CMAKE_CXX_STANDARD 11)

find_package(OpenCL REQUIRED)

include_directories(${OpenCL_INCLUDE_DIRS})

link_directories(${OpenCL_LIBRARY})

aux_source_directory(. SRC_LST)

add_executable(${PROJECT_NAME} ${SRC_LST})

target_link_libraries(${PROJECT_NAME} ${OpenCL_LIBRARY})

chaffdog

Member

Registered: 2011-10-10

Posts: 7

Re: clCreateContext Segmentation fault on arch linux with intel i7cpu

I can't offer any help but I today I have an identical problem (segfault in clCreateContext) using intel-opencl-sdk 2016-5.  My host code is written in C using CL/cl.h.  Using beignet I do not have the segfault but my kernel code does not appear to run.  Also completely new to openCL but I'll post back if I find a solution.

c0d3x

Member

From: Berlin

Registered: 2016-05-01

Posts: 7

Re: clCreateContext Segmentation fault on arch linux with intel i7cpu

now i am using the AMD-APP SDK that works, also with c, but it would be nice to get this intel sdk running.

greetings

LandoR

Member

Registered: 2014-04-23

Posts: 16

Re: clCreateContext Segmentation fault on arch linux with intel i7cpu

installing ncurses5-compat-libs solved the problem for me