[Starpu-devel] Cannot use OpenCL on CPU

[Berenger Bramas <berenger.bramas@inria.fr>]

Hello,

I am using OpenCL on CPU (mainly for development purpose)

StarPU was able to detect my CPU (Intel® Core™ i7-4610M CPU @ 3.00GHz × 4) as an OpenCL device until lately.

The following code is compiled well:
==================================================

#include <starpu.h>

#include <iostream>

#include <vector>

#include <unistd.h>

#ifndef STARPU_USE_OPENCL

#error StarPU must support opencl

#endif

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

    setenv("STARPU_NCPU","0",1);

    setenv("STARPU_NOPENCL","1",1);

    setenv("STARPU_OPENCL_ONLY_ON_CPUS","1",1);

    setenv("STARPU_OPENCL_ON_CPUS","1",1);

    setenv("STARPU_DISABLE_ASYNCHRONOUS_OPENCL_COPY","1",1);

    setenv("STARPU_OPENCL_PIPELINE","0",0);

    std::cout << "STARPU_MAJOR_VERSION " << STARPU_MAJOR_VERSION << std::endl;

    std::cout << "STARPU_MINOR_VERSION " << STARPU_MINOR_VERSION << std::endl;

    std::cout << "STARPU_MAXOPENCLDEVS " << STARPU_MAXOPENCLDEVS << std::endl;

    unsigned ret;

    struct starpu_conf conf;

    ret = starpu_conf_init(&conf);

    assert(ret == 0);

    ret = starpu_init(&conf);

    assert(ret == 0);

    starpu_pause();

    std::cout << "starpu_worker_get_count " << starpu_worker_get_count() << std::endl;

    std::cout << "starpu_cpu_worker_get_count " << starpu_cpu_worker_get_count() << std::endl;

    std::cout << "starpu_opencl_worker_get_count " << starpu_opencl_worker_get_count() << std::endl;

    starpu_resume();

    starpu_shutdown();

    return 0;

}

==================================================

But at execution I get:
==================================================

$ ./Tests/Debug/testOpenCLCPU
STARPU_MAJOR_VERSION 1
STARPU_MINOR_VERSION 3
STARPU_MAXOPENCLDEVS 8
[starpu][starpu_initialize] Warning: StarPU was configured with --enable-debug (-O0), and is thus not optimized
[starpu][starpu_initialize] Warning: StarPU was configured with --enable-spinlock-check, which slows down a bit
[starpu][starpu_initialize] Warning: StarPU was configured with --enable-verbose, which slows down a bit
[starpu][starpu_initialize] Warning: StarPU was configured with --with-fxt, which slows down a bit
[starpu][load_bus_latency_file_content] loading latencies from /home/berenger/.starpu/sampling//bus/berenger-HP-ProBook-640-G1.latency
[starpu][load_bus_bandwidth_file_content] loading bandwidth from /home/berenger/.starpu/sampling//bus/berenger-HP-ProBook-640-G1.bandwidth
[starpu][_starpu_init_machine_config] No worker found, aborting ...
==================================================

Thanks for the help.

Bérenger Bramas

HiePACS Project

Tel (05 24 57) 40 76
INRIA BORDEAUX Sud Ouest