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Option "-z defs" is no longer needed to detect missing symbols in code targeting Intel MIC Architecture at link time

Prior to Intel® Compiler 15.0 in the offload compilation model, the binaries targeting the Intel MIC Architecture were generated as dynamic libraries (.so). Dynamic libraries do not need all referenced variables or routines to be resolved during linking as these can be resolved during load time. This behavior could mask some missing variable or routine in the application resulting in a failure during load time. In order to identify and resolve all missing symbols at link time, option "-z defs" must be provided to the linker.

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  • Linux*
  • Server
  • C/C++
  • Fortran
  • Intel® Parallel Studio XE
  • Intel® Parallel Studio XE Composer Edition
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  • Cluster-Computing
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    Poor speed up in Phi

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    export MIC_ENV_PREFIX=XEONPHI
    export XEONPHI_KMP_PLACE_THREADS=60C,4t/30C,2t......
    export XEONPHI_KMP_AFFINITY=compact,granularity=fine

    Code:

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    Hey,

      I got automatic offload running for MATLAB and was able to test matrix multiplication and some LAPACK functions running on the Phi. However, I was wondering if it was possible to run element-wise operations on the Phi, for example:

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    B=rand(10000,10000);

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    Hi,

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    Code:

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    Hello,

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    At long last I am making my CentOS boot stick and copying BIOS versions to another stick.   Hopefully the magic smoke will not escape...

    1 Primary Physical Box -3-4 mics -  2-3 small Projects, 4-6 remote users not terribly concurrent.

    Some R, some Pynum, some C++ a bit of this a dash of that...

    XEN -> and then carve up a stack of administrative servers and development vms?

    Centos -> VMWare>

    Something else...

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    $mpicc test.c -o test -mmic

    /usr/bin/ld: skipping incompatible /opt/intel//impi/5.0.3.048/mic/lib/libmpifort.so when searching for -lmpifort
    /usr/bin/ld: skipping incompatible /opt/intel//impi/5.0.3.048/mic/lib/libmpifort.a when searching for -lmpifort
    /usr/bin/ld: cannot find -lmpifort
    collect2: ld returned 1 exit status

    Please help me out.

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