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tde_m's avatar
tde_m
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Emulation fails with user-defined data type for a kernel argument

Hello, as far as I understand, it is plausible to use a user-defined data type for a kernel argument. Example: typedef struct{ char my_id; char num_ids; }my_type_t; __kernel void app(co...
  • tde_m's avatar
    tde_m
    Icon for Occasional Contributor rankOccasional Contributor
    6 years ago

    Hi Hiroto,

    so according to the documentation I can pass structure parameters in OpenCL kernels by value.

    But the emulator fails in compiling it (see my first post). Why is this happening?

    This occur even if I disable the automatic alignment by using the packed attribute (in any case, the alignment is 1 byte being the struct composed by 2 chars).

    Thanks

    • Hiroto_K_Intel's avatar
      Hiroto_K_Intel
      Icon for New Contributor rankNew Contributor
      6 years ago

      Hi, tde_m,

      Yes, you are right.

      BTW, could you like to test with -fast-emulator flag ?

      Intel recommends when emulating kernel code, you add -fast-emulator for 18.1 and later.

      https://www.intel.com/content/www/us/en/programmable/documentation/mwh1391807965224.html#hzx1553406416602

      On my side, the code you posted firstly completed compiling successfully.

      Only -march=emulator mode is legacy now and it is possibility that the issue was reported and has been resolved when migrating from lagacy emulator to fast emulator.

      If so, I could not get the answer why, sorry.

    • tde_m's avatar
      tde_m
      Icon for Occasional Contributor rankOccasional Contributor
      6 years ago

      Hello,

      I've tried but the aoc compiler returns with an error message:

      Error: aoc: The Intel(R) Kernel Builder for OpenCL(TM) compiler (ioc64) can not be found

      I'm using Version 18.1.1 Build 263 Pro Edition.

      I've tried also on a different installation and version of the tool (19.1 Pro) and the error is always the same.

    • Hiroto_K_Intel's avatar
      Hiroto_K_Intel
      Icon for New Contributor rankNew Contributor
      6 years ago

      Hello,

      ioc64 is original component in system studio.

      Did you install intel_sdk_for_opencl_setup_<version>.run ?

      It is included in AOCLPro tar package(when uncompressed, it is in components) and when installing by using setup.sh, this run script should be executed.

      (If X11 windows disabled, the installation might fail)

      If not installed, could you please install it and try again ?

      If installed, please check the directory and you can see ioc64 binary.

      the default path as non-root user is here.

      /home/<user_name>/intel/system_studio_2019/opencl/SDK/bin