Phtrhead + offload

Chen__Xin — Sat, 31 Jan 2015 01:49:08 GMT

Hi I create a new thread and lanch offload code in this thread but I get this error code

offload error: cannot get function handles on the device 8117264 (error code 14)
The code likes as followings:

host code

if (pthread_create(&d_thread, NULL, RunDevice, d_data))
     {
       printf("\nCannot create device thread!\n");
       return;
     }

thread code

void *RunDevice(void *ptr)
{

   //Allocate memory in Phi
#pragma offload_transfer target(mic:0) in(udata:length(2*height*width) ALLOC)
#pragma offload_transfer target(mic:0) in(fdata:length(DATASEGMENT*height*width) ALLOC)
printf("here4\n");
   double t0 = WhenCPU();
#pragma offload target(mic:0) nocopy(udata:length(2*width*height) REUSE) nocopy(fdata:length(DATASEGMENT*width*height) REUSE)
    {
      tvdenoise_d(udata,fdata,width, height, mu, lambda, outerIter);
    }
double t00 = WhenCPU();
printf("First running time = %f\n", t00 - t0);

}

what happens?

This looks like a pthread

jimdempseyatthecove — Sat, 31 Jan 2015 13:56:43 GMT

This looks like a pthread issue on the host.

Insert #if 0...#endif in the body of your RunDevice (and anywhere else you have offloads).

Essentially conditionalize out all the MIC code.

Then compile the program, and see if you get the same error. If you do then you are likely linking in the wrong library.

Jim Dempsey

topic Phtrhead + offload in Software Archive

Phtrhead + offload

This looks like a pthread