topic Thank you for reporting this in OpenCL* for CPU

Help me!,compile opencl error for mic

hu_m_ — Sat, 30 Aug 2014 15:46:43 GMT

Help me!

compile my opencl code for cpu is ok.

icpc -o ArrayAdd -L/opt/intel/opencl-1.2-4.5.0.8/lib64 -L/opt/intel/opencl-1.2-4.5.0.8/libmic -I/opt/intel/opencl-1.2-4.5.0.8/include/ -I/opt/intel/opencl-1.2-sdk-4.4.0.134/include/ -lOpenCL -lrt ArrayAdd.cpp

but i compile it for mic,some errors:

icpc -mmic -o ArrayAddmic -L/opt/intel/opencl-1.2-4.5.0.8/lib64 -L/opt/intel/opencl-1.2-4.5.0.8/libmic -I/opt/intel/opencl-1.2-4.5.0.8/include/ -I/opt/intel/opencl-1.2-sdk-4.4.0.134/include/ -lOpenCL -lrt ArrayAdd.cpp

error:
x86_64-k1om-linux-ld: skipping incompatible /opt/intel/opencl-1.2-4.5.0.8/lib64/libOpenCL.so when searching for -lOpenCL
x86_64-k1om-linux-ld: cannot find -lOpenCL

why???

thanks

my mic info

micinfo
MicInfo Utility Log
Copyright 2011-2013 Intel Corporation All Rights Reserved.

Created Sat Aug 30 11:15:17 2014

System Info
  HOST OS   : Linux
  OS Version  : 2.6.32-358.el6.x86_64
  Driver Version  : 3.3-1
  MPSS Version  : 3.3
  Host Physical Memory : 65909 MB

Device No: 0, Device Name: mic0

Version
  Flash Version    : 2.1.02.0390
  SMC Firmware Version : 1.16.5078
  SMC Boot Loader Version : 1.8.4326
  uOS Version    : 2.6.38.8+mpss3.3
  Device Serial Number : ADKC24801867

Board
  Vendor ID    : 0x8086
  Device ID    : 0x225c
  Subsystem ID    : 0x2500
  Coprocessor Stepping ID : 3
  PCIe Width    : Insufficient Privileges
  PCIe Speed    : Insufficient Privileges
  PCIe Max payload size : Insufficient Privileges
  PCIe Max read req size : Insufficient Privileges
  Coprocessor Model : 0x01
  Coprocessor Model Ext : 0x00
  Coprocessor Type : 0x00
  Coprocessor Family : 0x0b
  Coprocessor Family Ext : 0x00
  Coprocessor Stepping : B1
  Board SKU    : B1PRQ-7110 P/X
  ECC Mode    : Enabled
  SMC HW Revision : Product 300W Passive CS

Thank you for reporting this

Jeffrey_M_Intel1 — Tue, 02 Sep 2014 06:51:14 GMT

Thank you for reporting this issue. We're investigating and will reply soon.

I suppose you configured your

Alexey_B_Intel1 — Tue, 02 Sep 2014 07:12:30 GMT

I suppose you configured your Intel Compiler to generate 'native MIC' executable and you should configure it for host.

It should be something like: source /opt/intel/composerxe/bin/compilervars.sh intel64

Hi,

Yuri_K_Intel — Tue, 02 Sep 2014 08:49:37 GMT

Hi, To run your OpenCL code on MIC you DON'T need to compile it differently/specifically for MIC. You should compile it as usual (as in your first example) and you should query available devices with clGetDeviceIDs and select the one with CL_DEVICE_TYPE_ACCELERATOR type inside your host program. In your second example you use '-mmic' flag which means - compile a native program (just a regular C/C++, not an OpenCL) for running on MIC. Thanks, Yuri

hu_m_ — Tue, 02 Sep 2014 09:09:26 GMT

thanks Jeffrey ， thanks Aleksey ，

thanks Yuri，I know your solution.

You think openCL has a similar method as openMP for MIC,offload and naive? or OpenCL has not naive method for mic?

I'm not sure I understand the

Yuri_K_Intel — Tue, 02 Sep 2014 10:00:50 GMT

I'm not sure I understand the question. And I guess you mean native (not naive). From OpenCL point of view MIC is an accelerator device (of CL_DEVICE_TYPE_ACCELERATOR type). And any OpenCL program consists of: - host part (platform/device selection, context/queue creation, program creation/build, data preparation and exchange with device, etc); - kernel part (OpenCL C program which performs calculations on device). When clBuildProgram is called on the host it builds the kernel part and creates an executable for specific device. In this case it will create an executable for MIC. This executable will be native (in some sense) for MIC, but there is no such concept in OpenCL and you have to create this executable by means of OpenCL API as I described. Thanks, Yuri

hu_m_ — Tue, 02 Sep 2014 12:51:49 GMT

thanks Yuri again,I tried according to what you said ,it works.

another different question, can we think MIC is a multicore CPU,in this way ,maybe we can run a opencl parallel Program in MIC,just

as openCL for CPU? because mic has its OS.