[gmx-developers] Simplified and updated OpenCL compilation

[Szilárd Páll]

Thanks for the fix, will have a look later.
--
Szilárd


On Thu, Jun 2, 2016 at 5:03 PM, Vedran Miletić <vedran at miletic.net> wrote:
> On 06/01/2016 01:33 AM, Vedran Miletić wrote:
>>
>> Hi,
>>
>> new simplified OpenCL looks nice, aside from one rather minor complaint
>> regarding error reporting. With a broken version of Mesa I get
>>
>> -------------------------------------------------------
>> Program:     gmx mdrun, version 2016-beta2-dev-20160531-2142182-unknown
>> Source file: src/gromacs/gpu_utils/ocl_compiler.cpp (line 470)
>> Function:    _cl_program* gmx::ocl::compileProgram(FILE*, const string&,
>> const string&, cl_context, cl_device_id, ocl_vendor_id_t)
>>
>> Internal error (bug):
>> Failed to compile NBNXN kernels for GPU #AMD TONGA (DRM 3.1.0 /
>> 4.5.5-300.fc24.x86_64, LLVM 3.9.0)
>>   Could not build OpenCL program, error was CL_BUILD_PROGRAM_FAILURE
>>
>> For more information and tips for troubleshooting, please check the
>> GROMACS
>> website at http://www.gromacs.org/Documentation/Errors
>> -------------------------------------------------------
>>
>> Previously I would get some garbage output in place of the
>> CL_BUILD_PROGRAM_FAILURE sentence, which is a very nice improvement.
>> However, I am missing the content from nbnxn_ocl_kernels.cl.FAILED that
>> would contain
>>
>> Compilation of source file failed!
>> -- Used build options: -DWARP_SIZE_TEST=64 -D_AMD_SOURCE_
>> -DGMX_OCL_FASTGEN_ADD_TWINCUT -DEL_EWALD_ANA -DEELNAME=_ElecEw
>> -DLJ_COMB_GEOM -DVDWNAME=_VdwLJCombGeom -DCENTRAL=22
>> -DNBNXN_GPU_NCLUSTER_PER_SUPERCLUSTER=8 -DNBNXN_GPU_CLUSTER_SIZE=8
>> -DNBNXN_GPU_JGROUP_SIZE=4 -DNBNXN_AVOID_SING_R2_INC=1.0e-12f
>> -DIATYPE_SHMEM -I"/usr/local/gromacs/share/gromacs/opencl"
>> --------------LOG START---------------
>> input.cl:59:10: fatal error: 'nbnxn_ocl_kernels_fastgen_add_twincut.clh'
>> file not found
>> input.cl:45:36: note: expanded from macro 'FLAVOR_LEVEL_GENERATOR'
>> ---------------LOG END----------------
>>
>> These lines are not printed in .log file nor stderr. Can they be printed
>> in the log or stderr? I will hopefully need this stuff less and less
>> once Mesa is fixed, but it is still nice to know why is your build
>> failing.
>>
>> Regards,
>> Vedran
>>
>
> Simple change in order of function calls fixes it:
> https://gerrit.gromacs.org/5927
>
>
> Regards,
> Vedran
>
> --
> Vedran Miletić
> vedran.miletic.net
> --
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