Intel® Many Integrated Core Architektur

Buyers Remorse

So I can't set up the Xeon Phi in Linux like I need it without it deleting my entire hard drive and I refuse to spend another $3000 just to be able to compile on windows. Now after spending days on the phone with support and getting no help at all I am left with a $2000 piece of crap I can't even use.

 

Buyer beware!

How to get peak performnace in FFT

Hi,

I want to get peak performance using batch FFT. I am giving sample code below that i have written. I have compiled on host using command icc -mkl fftcheck.cpp -o fftchecknew -L/opt/intel/mkl/lib/intel64. Also i have set some environment variables mentioned below.

export  MIC_ENV_PREFIX=MIC

export  MIC_KMP_AFFINITY=scatter,granularity=fine

export  MIC_OMP_NUM_THREADS=240

export MIC_USE_2MB_BUFFERS=64K.

./fftchecknew 512 1024 1024.

Rebuilding MPSS-3.2 (Yocto) release from source

Dear community,

I think I have managed to go some steps forward to rebuild the Intel Xeon Phi MPSS-3.2 release (with Yocto, poky, bitbake ...) to add some required features in our installation. Now I'm stuck at the following with missing source code to rebuild the minimal mpss image:

Offload error: process on the device 0 was terminated by signal 11 (SIGSEGV)

I have the error message: offload error: process on the device 0 was terminated by signal 11 (SIGSEGV)

Compiler flags: 

     icc $(SOURCES) -lOpenCL -fopenmp -O3

Offload code:

void Convolution_Serial_Offload_ExplicitMemCopy(float * pInput, float * pFilter, float * pOutput,

          const int nInWidth, const int nWidth, const int nHeight,

          const int nFilterWidth)

{

Segmentation Fault when using mpirun -f option

Whenever I use the mpirun -f option to run MPI programs on the device, I get a segmentation fault.

[user@node ~]$ echo mic0 > mic0.hosts
[user@node ~]$ mpirun -perhost 1 -n 2 -f mic0.hosts  ./hello
Segmentation fault

However, I am able to run it fine with the -host option or even with the -f option as long as there are no mic devices in the file.

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