Re: [Starpu-devel] Cannot use OpenCL on CPU

[Nathalie Furmento <nathalie.furmento@labri.fr>]

Could you send the output of the following command:

STARPU_OPENCL_ONLY_ON_CPUS=1 STARPU_OPENCL_ON_CPUS=1 starpu_machine_display

Thanks,

Nathalie

On 14/01/2016 14:26, Berenger Bramas wrote:

Hi Nathalie,

From the command I get the same behavior:

StarPU has found :
2 CPU threads
CPU 0
CPU 1
0 CUDA devices
0 OpenCL devices

topology ...
core 0 PU 0 CPU 0
PU 1
core 1 PU 2 CPU 1
PU 3

bandwidth and latency ...
from/to RAM
RAM 0

RAM 0

I use the svn from commit : r16748 | nfurmento | 2016-01-12 16:08:28 +0100 (mar. 12 janv. 2016)

And I can use OpenCL by hand on my CPU but not with StarPU.

Thanks.

Bérenger Bramas

HiePACS Project

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

---

De: "Nathalie Furmento" <nathalie.furmento@labri.fr>
À: "Berenger Bramas" <berenger.bramas@inria.fr>, starpu-devel@lists.gforge.inria.fr
Envoyé: Jeudi 14 Janvier 2016 14:19:32
Objet: Re: [Starpu-devel] Cannot use OpenCL on CPU

Hi Berenger,

Which version of StarPU are you using? How was it compiled?

If you start starpu_machine_display, what do you get?

Cheers,

Nathalie

On 14/01/2016 14:16, Berenger Bramas wrote:

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

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